6. Using the rules of significant figures, calculate the following:
6.167 +52
5.10
A) 11.4
B) 12
C) 11
D) 63
E) 11.41

Answers

Answer 1

Answer:

A. 3

B . 2

C. 2

D. 2

E. 4 significant figures


Related Questions

Question 7
Which of the following discoveries led to the development of the quantum mechanical model?
A electrons occupied different energy levels around the nucleus
B
atoms of gases combined to form compounds in whole-number ratios
Cmost alpha particles passed through gold foil without hitting matter
D cathode rays could be bent by a magnetic field

Answers

Idk bro this is wack cause no one answering my stuff either

In hot sunlight, dry sand heats up more than ocean water. What principles of heat and thermal energy does this difference demonstrate?

Answers

Answer:

1) Heat capacity

2) Thermal Conductivity

3) Heat reflection

Explanation:

The heat capacity of a body is the heat required to raise the temperature of the given mass of the body by 1° C.

The heat capacity = Mass × Specific heat capacity

Given that the mass of the ocean, which covers 70% of the Earth's surface has a much larger mass than a given unit of sand and that the specific heat capacity for the water (4,200 J/(kg·°C)) is much more than that of the sand (800 J/(kg·°C)), the heat required to raise the temperature of the mass of sand by 1°C is much less than the heat required to raise the temperature of the temperature of the ocean by 1°C

Therefore, the sand will have a higher temperature than the ocean when exposed to the same Sunlight

2) The ocean has a thermal conductivity of 0.5 W/(m·°C) the thermal conductivity of sand is 2.05 W/(m·°C), therefore, sand takes heat from the Sun faster than the ocean which also increases its temperature

3) The albedo, of the ocean is more than that of the sand so the ocean absorbs more of the Sun's heat than the sand but very little of the heat is conducted.

Which of the following are pure substances?
table salt, NaCl
water, H20
Oxygen, 02
elements
compounds
all of the above

Answers

NaCl, H2O and O2 are all pure substance since it cant be separated.

When a high mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse

Answers

Answer:

i guess it explodes

Explanation:

Answer:

carbon

Explanation:

Which of the following questions cannot be answered by science? How does color of light affect the mating behaviors of bees? How does soil pH affect the productivity of fruit trees? How does temperature affect the amount of oxygen able to dissolve in water? How do contrasting colors affect the quality of a painting?

Answers

Answer: How do contrasting colors affect the quality of a painting

Answer:

The answer is D.

Explanation:

I just took the test. :)

Part One: Calculate the molarity of Ba2+ in an aqueous solution that contains 1.7 g of Ba(OH)2 in 0.75 L of solution.
Answer in units of mol/L.

Part Two: What is the molarity of H3O+?
Answer in units of mol/L.

Answers

Explanation:

Ba(OH)2 ==>  Ba2+  +  2OH-

1.7 g = 0.008172796 moles Ba(OH)_2

1:1 for Ba2+ = 0.008172796 moles / .15L = 0.054M

2:1 for OH- = 0.016345593 moles / .15L = 0.109M

Kw = [H+] x [OH-] = 10^{-14}

10^{-14} / 0.109 = 9.2×10^{-14}  = [H+]

Imagine that Ana has a block made of pure gold. If she cuts this block into two equal pieces, pick the statement that best describes the resulting pieces.

Answers

Answer:

The density of each piece is the same as that of the original block.

Explanation:

Options

The mass of each piece is the same as that of the original block.

The weight of each piece is the same as that of the original block.

The density of each piece is the same as that of the original block.

The volume of each piece is the same as that of the original block.

The correct answer would be that the density of each piece is the same as that of the original block.

The density is the ratio of the mass of a substance to the volume of the substance. This ratio is constant for all substances because the mass of any object varies proportionally with the volume of the object. The more the mass increases, the more the volume also increases, and vice-versa.

Answer:

The answer is, C. funnel

Explanation:

Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?

Answers

Answer:

Formation of intermolecular hydrogen bonding between water molecules and molecules of n-butanol

Explanation:

Low molecular weight alcohols are miscible with water in all proportions. The reason for this is that, when a low molecular weight alcohol is dissolved in water, intermolecular hydrogen bonds are formed between the low molecular weight alcohol and water molecules.

Low molecular weight alcohols such as n-butanol contain the polar -OH group which interacts with water via hydrogen bonding.

Answer:

n-Butanol molecules surround water molecules.

Explanation: its correct on ed gen uity

What is 0.00034 in exponential form

Answers

Answer:

3.4  ×  10 ^− 4

Explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Which has a larger density a large brick or a small brick? why?

Answers

Answer:

15.2

Explanation:

the chemical reaction in chemistry libretto texts.

Answer:

Neither

Explanation:

Density is independent of size. Basically, the density of an object isn't determined by it's size.

If two objects are made of the same exact material, they will have the same exact density, regardless of the size.

So, the large brick and the small brick will have the same density, as long as they are made from the same type of brick material.

what is the difference between deep water and shallow water waves???

Answers

Answer:

The change from deep to shallow water waves occurs when the depth of the water , d , becomes less than one half of the wavelength of the wave, λ....A wave with a longer wavelength travels at higher speed . In contrast , shallow - water waves show no dispersion . Their speed is independent of their wavelength .

Hope this helps :)

In an ocean ecosystem,the difference between deep water and shallow water waves is that  waves in water deep enough so that the bottom has no effect on them are termed deep-water waves, whereas waves most affected by the bottom are called shallow-water waves.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Learn more about ecosystem,here:

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How might you measure the amount of energy in the world's largest rice cake?

Answers

Answer:

kindly check the explanation section.

Explanation:

The largest rice cake in the world was discovered in the year 2007 in South Korea with a weight of 8,113 lb. The amount of energy in the World's largest rice cake can be determined by using the formula below:

The energy in kJ =[ mass of water] x [specific heat capacity of water] x [change in temperature].

In order to determine experimentally in the laboratory and make use of the formula above. The first thing[STEP ONE] to do is to measure the mass of the rice cake and record it.

STEP TWO: measure a known amount of water in a boiling tube.  

STEP THREE: Heat the rice cake until it catches fire with a Bunsen flame.

STEP FOUR: Use the rice cake that has already caught fire in step three above and use it to heat the water in step two until the fire burns out.

Repeat the process for three to four times and record your observations under the following headings;

[1]. Mass of cake, [2]. Temperature  of water  before  burning, [3]. Temperature  of water after  burning and Temperature  increase per  gram of the rice cake.

Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, and the average height of the falls is about 50 m. Knowing that the gravitational potential energy of falling water per second = mass (kg) × height (m) × gravity (9.8 m/s2), what is the power of Niagara Falls? How many 15 W LED light bulbs could it power?

Answers

Answer:

The power of Niagara falls is 1,176 Mega Watts

The number of 15 Watt bulbs it can power is 8,400,000 bulbs

Explanation:

The rate at which the water falls given as the mass flow rate = 2,400,000 kg/s

The height from which the water falls = 50 m

The gravitational potential energy (potential energy PE.) of falling water = Mass (kg) × height (m) × gravity (9.8 m/s²)

The mass of water that falls per second = 2,400,000 kg

PE. = 2,400,000 kg × 50 m × 9.8 m/s² = 1,176,000,000 Joules

The power = The rate at which the energy is generated = The amount in kg of water that fall from the height per second × The height × Acceleration due to gravity

The power = 2,400,000 kg/s × 50 m × 9.8 m/s² = 1,176,000,000 Watts

The power of Niagara falls = 1,176,000,000 Watts = 1,176 Mega Watts

The number of 15 Watt bulbs it can power = 1,176,000,000/15 = 78,400,000 bulbs

The number of 15 Watt bulbs it can power = 8,400,000 bulbs.

Explain the brosted lowery Concept of Acid & Bases with the help of example? I will brainlist you for the correct answer.

Answers

Answer:

•A Brønsted-Lowry acid is any substance (molecule or ion) that can donate a hydrogen ion ( H+ ).

•A Brønsted-Lowry base is any species that can accept a hydrogen ion ( H+ ).

Explanation:

*example based on the picture*

Take the following reaction for example:

Hydrochloric acid ( HCl ) is the Brønsted-Lowry acid because it donates a hydrogen ion. Ammonia ( NH3 ) is the Brønsted-Lowry base because it accepts the hydrogen ion.

The Brønsted-Lowry theory also introduces the concept of conjugate acid-base pairs. A conjugate acid-base pair are two species that differ by a ( H+ ) ion.

Based on the reaction above, the ammonium ion( NH+4 ) is the conjugate acid of the base ammonia and the chloride ion ( Cl− ) is the conjugate base of hydrochloric acid.

Hope this helps !

which of the following is a physical property?
a. flammability
b. heat of combustion
c. solubility
d. toxicity

Answers

Answer:

C. Solubility

Explanation:

Solubility. A physical property does not change the chemical compostion. Solubility can be observed, unlike the others.

Answer: c. solubility

Explanation: hope this helps

Example #2: Ajet is traveling at 80 m/s when it starts to approach
a runway. It is able to land and park in 10 s. What is its
acceleration?

Answers

Answer:

-8 m/s^2

Explanation:

The formula for acceleration is:

a= v^2 - v^1/t

a= acceleration

v^2- final velocity which in this case would be 0 since the jet comes to a stop.

v^1= original velocity which is 80 m/s.

t=time or 10s

Substitute the letters for the numbers and you get this:

a= 0 - 80/10

0 - 80= -80

-80 divided by 10 is -8.

Hope this helps! :)

What is the parent isotope when Cl-33 is formed during a beta decay?

Answers

Answer:

33/16 S

Explanation:

In beta decay, the atomic number of the daughter nucleus increases by one unit while the mass of the daughter nucleus remains the same as that of the parent nucleus.

Hence, if we know that a beta decay has occurred, then the parent nucleus must have the same mass as its daughter nucleus but have an atomic number that is less than that of the daughter nucleus by only one unit, hence the answer above.


Three models of atomic theory are illustrated in the image. Place them in chronological order.
A)
A, B, C
B)
BAC
CAB
D)
CBA

Answers

CAB we started out thinking it was all over the place and slowly figured out how it was aligned

Help on this question.

Answers

Density= mass/volume

D=25/25

D= 1  g/cm^3

what are the fundamental particles of an atom

Answers

Protons, neutrons, and electrons are the fundamental subatomic particles.

Which term represents the movement of molecules from an area of lower concentration to one of higher concentration with carrier molecules, using energy?

Answers

Answer:

Active transport

Explanation:

Active transport is defined as the movement of ions or molecules from a region of lower concentration into a region of higher concentration by the use of energy. Two examples of active transport include the uptake of glucose in human intestine and the absorption of mineral ions into plant roots.

Active transport requires energy because it involves the movement of molecules against an existing concentration gradient.

Explain the need of the term avarage atomic mass

Answers

Answer:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotopе). An element does not have an absolute atomic mass.

Hope this helps :)

What is the volume of a liquid with a density of 1.5 g/L and a mass
of 78 grams?

Answers

Answer:

d =

m

V

m = d×V

V =

m

d

DENSITY

Density is defined as mass per unit volume.

d =

m

V

Example:

A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density?

Step 1: Calculate the volume

V = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³

Step 2: Calculate the density

d =

m

V

=

433

g

200

c

m

³

= 2.16 g/cm³

MASS

d =

m

V

We can rearrange this to get the expression for the mass.

m = d×V

Example:

If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass?

m = d×V = 500 mL ×

1.11

g

1

m

L

= 555 g

VOLUME

d =

m

V

We can rearrange this to get the expression for the volume.

V =

m

d

Example:

What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.

Step 1: Convert kilograms to grams.

14.83 kg ×

1000

g

1

k

g

= 14 830 g

Step 2: Calculate the volume.

V =

m

d

= 14 830 g ×

1

c

m

³

19.32

g

= 767.6 cm³Explanation:

Which statement best explains why the overall charge on an atom is zero? The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud. The positive charge of the protons in the nucleus equals the negative charge in the electron cloud. The negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud. The negative charge of the protons in the nucleus equals the positive charge in the electron cloud.

Answers

the positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud

Answer:

B on egde

Explanation:

Identify the number of significant figures in each of these measurements of an object length: a. 76.48 cm b. 76.47 cm c. 76.59 cm

Answers

All of the measurements have 4

The number of significant figures in each of these measurements of an object's length: a. 4  b. 4 c. 4.

What are significant figures?

The significant figures are the digits or numbers from zero to nine which are used to signify and specify the reporting of the measurement having uncertain digits.

Starting zero is not significant, decimal is not significant, ending zero after the decimal is significant and ending zero before and without decimal is not significant.

Therefore, a. 76.48 cm = 4 b. 76.47 cm c. = 4 76.59 cm = 4 are the number of significant figures in each of these measurements of an object's length.

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Justin B. Believes that the temperature lowering during the fall months is what causes the color of the leaves to change. He set up an experiment wherein he placed some plants in 80 degrees rooms and some in 60 degree rooms. He observed the color of the leaves for a total of 1 month. At the end of the month Justin observed that 3/4 of the plants in the 60 degree temperature had begun to change colors and only 1/4 of the plants in the 80 degree temperature began to change colors.

Answers

Answer:

This question is incomplete, the remaining part of the question is:

What is the control group, independent variable and dependent variable?

Control group: Plants placed in 80 degree rooms

Independent variable: Change in temperature

Dependent variable: Change in color of leaves

Explanation:

The independent variable in a scientific experiment is the variable that the experimenter controls or manipulates in order to bring about a change in the dependent variable. In this experiment, the variable manipulated by Justin B is the TEMPERATURE CHANGE.

On the other hand, a variable is said to be dependent if it is the variable that responds to a change made to the independent variable or rather it is the outcome. In this experiment, Justin B is trying to see the outcome on the color change in leaves when exposed to a low temperature, hence, COLOR CHANGE IN LEAVES is the dependent variable.

Control group of an experiment is the group that receives no experimental treatment. It is the group the experimenter considers normal and hence is comparing with his experimental group. In this experiment, Justin B believes the leaves change color in a low temperature, hence, he placed some plants in a lower temperature (60 degree) in order to compare them with when the plants are placed in a higher temperature (80 degree). As far as this experiment is concerned, the plants placed in 80 degrees temperature are believed by Justin B not to undergo color change, hence, they are the CONTROL GROUP while the group he placed in 60 degrees temperature are what he is interested in, making them the EXPERIMENTAL GROUP

13. To refine aluminum from its ore, aluminum oxide is electrolyzed to form aluminum and oxygen. At which electrode does oxygen form?
O A. Both the anode and the cathode
OB. Anode
O C. Cathode
OD. Neither electrode

Answers

Answer:

I think B

Explanation:

Answer:

Anode

Explanation:

WHAT IS THE CHEMICAL FORMULA FOR WATER

Answers

Answer:

are you a kid bruh xd

Explanation:

H2O

Answer:

[tex]\huge\boxed{H_{2}O}[/tex]

Explanation:

Water is made up of two elements => Hydrogen and Oxygen

There are two hydrogen and one oxygen

So,

The chemical formula for water is:

=> H₂O

Convert 205 L to ul.

Answers

Answer: 205000000 microliter

Hope this helps!

Answer:

2.05 x 10⁸ uL

205000000 uL

Explanation:

Step 1: Find the conversion

1 liter (L) = 1 x 10⁶ microliters (uL)

Step 2: Set up dimensional analysis

[tex]205 L(\frac{1(10)^6uL}{1L} )[/tex]

Step 3: Multiply and cancel out units

Liters and Liter cancel out.

We are left with uL

205(1 x 10⁶) = 2.05 x 10⁸ uL or 205000000 uL

A neutral solution is neither acid nor base. True or False

Answers

Answer:

true

Explanation:

Other Questions
4 pointsAccording to Thomas Jefferson, what was the purpose of the United Statesgovernment?O A. to reject taxationB. to defeat foreign powersC. to secure the rights of its peopleD. to enforce and strengthen patriotism write a letter to the editor of daily paper on political vigilantism 2. Perform the following operations to find the terms to complete the blanks.- 1Part A: (a - 1)(1 + a + a) =- 49Part B: [(x - y) + 7][(x - y) - 7] =(y2 3x)Part C: -5(3y+ - 4y2 + 7x)(y2 3x) =+ 105x2= -15y +Part D: (3m - 2n)3 = (9m2 - 12mn +4n?).= 27m3 -+- 8n3 Find the distance between the pair of points.(-6, -20) and (-17, -22) Plz help idk which one it is In Spanish, use the vocabulary you have studied to answer the following questions. Please use the yo form of the verbsin your response.Note: Remember, right now your Spanish vocabulary is limited. Your responses do not need to reflect what you wouldsay if you were answering in English. There's no set length for your answer, and it's better to say a small amountcorrectly than to try to say many things, that you may not have covered, Incorrectly.1. Qu estudias en la escuela?2. Qu deseas estudiar?3. Qu haces cuando no estudlas? Functions of the organ systems of the body. Classify each of the following physiological functions with the correct body system.A. Receives sensory input B. Helps regulate metabolism C. Produces hormones D. Produces gametes E. Maintains posture F. Differs in males and femalesG. Supports the body H. Initiates motor output I. Produces heat J. Produces blood cells 1. Skeletal System 2. Muscular System 3. Nervous System 4. Endocrine System 5. Reproductive System Reset n/12 = 300 n = pls help again Select the correct answer. A bottlenose dolphin is 10 feet below sea level. Then it begins to dive at a rate of 9 feet per second. What is the equation of the line that represents its elevation, y, after x seconds? 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A. an argument among the main characters B. what the characters say and how they interact while talking C. a prediction about the end of a story D. a conclusion you make based on information given in the text Marcus, feeling stressed out from work, decided to search for a meditation app for his phone that would help him relax during the day. One app, CalmDown, appeared to be promising. It didn't have any reviews yet and looked to be a brand-new app, so he decided to try it out. He downloaded the app to his phone and opened it up. The first screen required he enter in his name and email address. At the very bottom of the screen it had some small writing, but Marcus didn't notice it and hit the continue button.Had Marcus clicked on the link at the bottom of the screen, he would have seen the following:The second screen stated "Three-day trial version- Free! $59.99 annual fee thereafter." Marcus was annoyed that the app would cost him almost $60 but figured he would set a reminder on his phone to cancel the app before the trial period expired so he wouldn't get charged. Plus, he wanted to see the app in action. If it was actually worth the price, he wouldn't mind paying the annual fee. He clicked "Continue" and put in his bank card information on the next screen. The following screen asked Marcus a series of questions about his stress level and what he felt caused stress in his life. He clicked "high" and "work" as the level and cause. He then completed the first CalmDown meditation in the app, but was not impressed with its functionality. Deciding he would cancel his subscription immediately, he went into the profile settings to try to find the cancel option but couldn't. He searched every possible place on the app but didn't see a way to cancel the subscription. Marcus decided to try to find the app's developer through their website, but a quick search didn't turn up anything. Already stressed and becoming more frustrated, Marcus decided to contact the app store. They informed him that he should be able to go into his app store account and cancel the subscription there. However, when Marcus went there, he didn't see the app as an option or as a subscription. Thinking that maybe his subscription didn't process, he just deleted the app from his phone.Marcus didn't give the app or the subscription any more thought, becoming increasingly more distracted by the amount of stress at work. Four months later, Marcus was looking at his bank account online and noticed it was lower than it should have been. He began reviewing the charges and noticed multiple charges for $59.99 to a merchant named "CDgotU." He immediately remembered the app and contacted his bank to dispute the charges. 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