Given :
Measurements [tex]4.5\ cm\times 2000.0\ cm\times 4\ cm[/tex] .
To Find :
The multiplication using significant figures .
Solution :
We know , the least number of significant figures in any number of the problem determines the number of significant figures in the answer.
So , significant figure( S.F) in 4.5 cm is 2 .
S.F in 2000.0 cm is 5 .
S.F in 4 cm is 1 .
So , minimum S.F is 1 .
Therefore , S.F of their product is 1 .
Now , multiplying them we will get :
[tex]M=4.5\times 2000.0\times 4 \ cm^3\\\\M=36000\ cm^3[/tex]
Now , converting 36000 in 1 significant digit .
First we will write it in exponential 2 S.F form.
[tex]3.6\times 10^4 \ cm^3[/tex]
Now , to convert 3.6 into 1 S.F we should round off this .
So , round off 3.6 we will get 4 .
Therefore , The multiplication using significant figures is [tex]4\times 10^4\ cm^3[/tex] .
Hence , this is the required solution .
Question 2
How many significant figures does the number have?
23.0702
You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by
Answer:
All of the above
Explanation:
This is correct
10g sugar is dissolved in 90g water.The density of the solution is 1.09g/ml.Calculate mass/volume percentage concentration of the solution.
Please answer asap!! how does the density of an object identify the material the object is made from?
Answer:
If you were to divide any object into small pieces of unit volume, the density would be the mass of each small piece. Everything is made up of molecules, which in turn are made up of atoms. So every object is created from the aggregation of atoms and molecules.
:)
which should I choose?
Answer:
liquid
Explanation:
thank me
how many grams of oxygen are in 25 grams of sugar?
Answer:
13 grams of Oxygen
Explanation:
Step 1: Find molecular formula of sugar
C₁₂H₂₂O₁₁
Step 2: Convert moles of oxygen present to grams
1 mol O = 16 g O
11 mol O = 176 g O
Step 3: Find molar mass of sugar
C - 12.01 g/mol
H - 1.01 g/mol
O - 16.00 g/mol
12.01(12) + 22(1.01) + 11(16.00) = 342.34 g/mol C₁₂H₂₂O₁₁
Step 4: Set up dimensional analysis
[tex]25 gC_{12}H_{22}O_{11}(\frac{176 gO}{342.34gC_{12}H_{22}O_{11}} )[/tex]
Step 5: Multiply/Divide and cancel out units
Grams of C₁₂H₂₂O₁₁ and grams of C₁₂H₂₂O₁₁ cancel out.
We are left with grams Oxygen
25/342.32 = 0.073031(176) = 12.8535 grams Oxygen
Step 6: Simplify
We only have 2 significant figures in this problem. Thus,
12.8535 = 13 g O
2. Briefly describe how the law of conservation of mass was developed.
Answer:
History of the Law of the Conservation of Mass
The ancient Greeks first proposed the idea that the total amount of matter in the universe is constant.This law states that, despite chemical reactions or physical transformations, mass is conserved that is, it cannot be created or destroyed within an isolated system.
Explanation:
What is the connection between Archimedes and the Mass-Volume lab
Answer:
Explanation:
This question is not very clear, however, going by the key words in the question, Archimedes' principle shows a relationship between mass and volume.
Archemedes' principle states that when a body is fully or partially immersed in fluid, it is acted upon by an upward force which is equal to the weight of the fluid displaced by the body.
The volume displaced here can be determined using the formula
Density of liquid = mass displaced ÷ volume
Hence, volume = mass displaced ÷ density of liquid
If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is
decreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2
Answer: P1V1 + P2V2
Explanation:
Is the following statement a fact,, opinion, or theory? Why?
Scrambled eggs are better for breakfast than cereal. I can stay full longer if I eat eggs.
Answer:
i think opinion cause you could be saying in my opinion, scrambled eggs are better for breakfast than cereal.
What has more kinetic energy, the floor or a computer?
Answer:
Computer.
Explanation:
The computer is moving more than the floor, at least, it's moving when people are typing on it.
Which skill involves creating representations of complex objects or processes? A. classifying B. predicting C. making models D. evaluating (this is probably really easy, but my mind is going blank)
Answer:
C. making models
Explanation:
Making models facilitates constructing depictions of complex objects or practices that enable students to practice and understand how things work which can not be observed and measured directly. Model making needs abstract thinking about the tools and material used, spatial thinking, and well-organized idea of the project to create complex objects.
Plz answer these questions :
Answer: 2) see below
3) 2AgCl → 2Ag + Cl₂
Explanation:
2)
Step 1: Crushing & Grinding CuFeS₂(s)→ CuFeS₂(s)
Step 2: Froth Flotation CuFeS₂(s)----> CuFeS₂ (l)
Step 3: Roasting 2CuFeS₂(l) + 3O₂(g) → 2FeO(s) + 2CuS(s) + 2SO₂(g)
Step 4: Converting matte to blister Cu₂S(l) + O₂(g) → 2Cu(l) + SO₂(g)
Step 5: Anode Casting Cu(l) → Cu(s)
Step 6: Electrolytic Refining Cu(s) → Cu(s)
Anode: Cu(s) → Cu₂ + (aq) + 2e-
Cathode: Cu2 + (aq) + 2e- → Cu(s)
see diagram below for illustration of steps
3) When silver chloride (solid) is exposed to sunlight, it decomposes into silver (solid) and chlorine (gas).
The equation is written as: [tex]2AgCl_{(s)}\xrightarrow{\text{sunlight}}}2Ag_{(s)}+Cl_{2(g)}[/tex]
Something about chemistry, is there such thing of mixing items to create medicine. If so what is it called? Medical chemistry?
Answer:
Drug compounding is often regarded as the process of combining, mixing, or altering ingredients to create a medication tailored to the needs of an individual patient.
PLZ HELP!!! ILL MARK BRAINLIEST!!! Would you consider the practice of "ghost hunting” to be closer to science or pseudoscience, based on the information provided in the article? Provide two examples to support your answer.
Answer:
I would consider the practice of "ghost hunting” to be closer to pseudoscience than science because the work described in the article mostly lacks process and is subjective. In the article, people looking for evidence of ghosts do not set up controlled experiments with repeated trials. Instead, they take several measurements and make guesses about what might be causing the results they see. The people in the article also base conclusions on observations such as feeling a "heavy presence” or a "sudden chill.” These are subjective observations.
Explanation:
Answer:I would consider the practice of "ghost hunting” to be closer to pseudoscience than science because the work described in the article mostly lacks process and is subjective. In the article, people looking for evidence of ghosts do not set up controlled experiments with repeated trials. Instead, they take several measurements and make guesses about what might be causing the results they see. The people in the article also base conclusions on observations such as feeling a "heavy presence” or a "sudden chill.” These are subjective observations.
Explanation:
A rock occupies a volume of 20.0 cm3 and has a mass of 54 grams. What is its density?
Answer:
Density = 2.7 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]From the question
mass = 54 g
volume = 20 cm³
Substitute the values into the above formula and solve for the density
That's
[tex]Density = \frac{54}{20} [/tex]We have the final answer as
Density = 2.7 g/cm³Hope this helps you
HELP ASAP!! 15 PTS!! Match each of the unknown ions to its appropriate description.
1. B+
2. A−
3. D2+
4. C2−
a. A nonmetal that gained one electron
b. A metal that lost one electron
c. A nonmetal that gained two electrons
d. A metal that lost two electrons
Answer:
1 and a
2 and b
3 and c
4 and d
Explanation:
+ = gained
- = lost
when there is a two it has two electrons
I also had a high school friend check my accuracy
HOPE THIS HELPS!!!! :)
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Answer:
The answer above is wrong. Under explanation it is correct.
Explanation:
1. c
2. b
3. a
4. d
I took my test and got it wrong using above answers, but these are correct! ; /
gold has a density of 19.3 g/ml. if you have 4.0 grams of gold, what is the volume of the sample
Answer: The volume is 37.0 cm3Au
Explanation:
Answer:
4.825 mL
Explanation:
19.3 g/mL * 1/4.0 g = 4.825 mL
Classify the following pieces of matter:
bronze
pure water
tap water
trail mix
Answer:
bronze - solid
pure water - liquid
tap water - liquid
trail mix - solid
Explanation:
There are 4 classes of matter based on the characteristics of their molecules:
SolidsLiquidsGasesPlasmaThe molecules in solids are tightly packed together and are more or less fixed about a point with very little of no movement. The molecules in liquids are less tightly packed and are able to take the shape of their containers. The molecules in gases are loosely packed and compressible. They can take the shape of containers as well as expand to a container due to their loosely packed molecules.
Plasma molecules neither have shape nor volume but are able to produce both magnetic and electric currents as well as respond to electromagnetic fields.
Hence bronze has all the characteristics of a solid, pure and tap water both have the characteristics of a liquid, while trail mix can be considered a solid.
Return all unused chemicals to their original containers true or false
Answer:
no
Explanation:Unused chemicals are never returned to their original containers because you will be contaminating the chemical. Dispose of unused chemicals in the proper containers.
Which of the following are examples of plasmas?
Answer:
i will tell some examples of plasmas they are:
1.lightning
2.solar wind
3.welding arcs
4.stars(including the sun)
5.the earths's ionosphere
Answer: which of the following are examples of plasmas?
Choices: 1. Ice cubes 2. Tails of comets 3. A gas fire 4. The ionosphere 5. A neon sign 6. A flashlight
Explanation:
The Answer: is 2. Tails of comets 4. The ionosphere 5. A neon sign
How does increased temperature affect the amount of salt, carbon, and other substances able to dissolve in the ocean? What are the resulting effects?
Answer:
For solid salts that are soluble in the sea water, as the sea water temperature rises, the solubility of the salt in the water increases. The accompanying increase in the kinetic energy of solvent water molecules with the increase in the temperature of the seawater results in the increase in the number of solute salt inter-molecular bonds being broken by the energetic solvent molecules resulting in increasing solubility of the solids
However, for gases, the increase in temperature of the sea water results in a decrease in the solubility of all gases. The process is also explainable by the kinetic theory such that a rise in temperature of the gas seawater solution increases the kinetic energy of both the solvent water and the solute gas. The higher energy gases are moving much faster and are then then able to separate from the less mobile liquid gas combination.
The resulting effects
1) The surface (topmost) hotter portions of the sea have fewer living organisms
2) Fishes that come to the surface frequently gas for air by bringing their head above water
3) Most of the life forms are located deep within the sea
4) Formation of water movement cycles within the ocean and polar water bodies
5) Mechanical nature of the sea compared to fresh water bodies
Explanation:
PLZ HELP!!! ILL MARK BRAINLIEST!!! You read an article written by an amateur ghost hunter. It includes the following paragraph. I spent one night in the home. As soon as I entered it, I got a sudden chill, as if someone didn’t want me there. As I walked through the hall, I felt a heavy presence all around me. I measured a large amount of energy coming from the upstairs bedroom. I believe there is a ghost in the home. This ghost hunter claims that there is a ghost in the home. Is this a scientific claim? Why or why not?
No, it is not a scientific claim. If a ghost hunter catches a voice on video like ghost hunters do you can either believe it or not. Ghosts are more of a i believe it you dont have to type of thing becasue they have not been scientifically proven to exist.
What is the mass of 15 moles of carbon atoms? Round your answer to the nearest hundredth
In order to convert the moles of a substance to grams, you will need to multiply the mole value of the substance by its molar mass. More commonly written for this application as: where, is the molar mass of the substance.
Hope this helped
:)
what is the latin name for this plant
Answer:
plantae
Explanation:
if you look up the Latin it says plantae
Answer:
"Cactus", wich is a member of the plant family Cactaceae.
What is the solution for x in the equation? -3x + 7x − 8 = 34 + 9x − 2
Answer:-8
Explanation:
edmentum
The solution for the given linear equation can be solved by simplifying the equation. The value of x is obtained as - 8.
What is linear equations?Linear equations are the equations which shows a linearity with a second expression which is similar to the first but having different mathematical operations and signs.
By solving linear equations we can solve for the unknown value of x. The value of x can be obtained by taking the whole expression to one side and which is having a constant value.
Given, - 3x + 7x - 8 = 34 + 9x -2.
= 4x - 8 = 32 + 9x
= 4x - 8 - 9x = 32
-5x = 40
x = - 40/5 = - 8.
Hence, solution of the given equation is -8.
To find more on linear equations, refer here:
https://brainly.com/question/29739212
#SPJ2
Convert 186282 miles hour into meters per second
Answer:83275.50528m/s
Explanation:
What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?
A scientist placed a sample of lithium into a container of water. The scientist observed the lithium floating and making a buzzing sounf ad gas bubbles were forming arounf it. Which conclusion is BEST supporter by this observation? A) Dissolved gases were released. B) A chemical change took place. C) Water was vaporized. D) The lithium was dissolved by the water.
Answer:
b
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Answer:
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Explanation:
ncs njevt hibveynvuirn2uivnwru8cnajoncuiwrnf24nvojwnvojwnfjr2nfln24f8u1elkcjo2joc2rjkf
Is Coca Cola a homogeneous mixture
Answer:
Yes
Explanation:
Coca Cola is a homogenous mixture, just like sugar, salt, and more. Hope this helps!
Answer: Yes
Explanation: Coca cola is a homogeneous mixture because the syrup and water are mixed evenly throughout the solution. For example, an unopened soda in a bottle has a uniform composition and is a homogeneous mixture. Once you open the bottle, bubbles appear in the liquid. The bubbles from carbonation are gasses, while the majority of the soda is liquid. An opened can of soda is an example of a heterogeneous mixture.
Hope this helps^^