Answer: There are 5 significant figures in 10.006L
Explanation: Since there is a decimal point, all the digits after the decimal point also count as significant figures. Below is a key to help yu out:
Not Significant:
- Leading zeroes(in decimal): example- 0.0023= 2 sig figs
- Trailing zeroes with no decimal point: example- 2300= 2 sig figs
Significant:
- middle zeroes: example- 4003= 4 sig figs
-trailing zeroes with decimal point: example- 23.00= 4 sig figs
How can a fire be extinguished?
Answer:
Answer below!
Explanation:
A fire can be extinguished by many forms like fire extinguisher, but the main is water. Water can extinguish fire.
THANK U
Answer:
The preferred method for extinguishing class “A” fires is to remove the heat. Water is the most common agent, but others such as dry chemical, halon, halogenated agents and foam can be used effectively. A class “B” fire involves flammable liquid or gas.
Explanation:
PLEASE HELP WITH CHEM CLASS!!!!!
Please please please !! Explain depth. Please !!!!
Answer:
The answers to your questions are given below
Explanation:
1. KClO3 => Potassium trioxochlorate (V)
Thermal decomposition of KClO3.
When we heat potassium trioxochlorate (V), KClO3, it will slip into two producing potassium chloride, KCl and oxygen gas, O2 as shown below:
2KClO3(s) —> 2KCl(s) + 3O2(g)
Note: the above reaction will occur faster and at a lower temperature in the presence of manganese (iv) oxide as catalyst.
2a. Determination of the number protons and neutrons in Nitrogen–14.
Nitrogen–14 has the following:
Mass number = 14
Atomic number = 7
Proton =?
Neutron =?
Atomic number of an atom is simply the proton number. Therefore,
Proton = Atomic number
Atomic number = 7
Proton = Atomic number = 7
Proton = 7
Mass number = Proton + Neutron
Mass number = 14
Proton = 7
Neutron =?
14 = 7 + Neutron
Collect like terms
Neutron = 14 – 7
Neutron = 7
Therefore, Nitrogen–14 has 7 protons and 7 neutrons.
2b. Determination of the number protons and neutrons in Nitrogen–15.
Nitrogen–15 has the following:
Mass number = 15
Atomic number = 7
Proton =?
Neutron =?
Atomic number of an atom is simply the proton number. Therefore,
Proton = Atomic number
Atomic number = 7
Proton = Atomic number = 7
Proton = 7
Mass number = Proton + Neutron
Mass number = 15
Proton = 7
Neutron =?
15 = 7 + Neutron
Collect like terms
Neutron = 15 – 7
Neutron = 8
Therefore, Nitrogen–15 has 7 protons and 8 neutrons.
6. Many changes have been made to atomic theory since Daltons time.
A. List the key difference between modern atomic theory and dalton's atomic
theory
B. What important aspect of scientific theories is illustrated by these differences
Answer:
A. Modern atomic theory is, of course, a little more involved than Dalton's theory but the essence of Dalton's theory remains valid. ... Also, there are different kinds of atoms (differing by their masses) within an element that are known as "isotopes", but isotopes of an element have the same chemical properties.
B. The explanation becomes a scientific theory. In everyday language a theory means a hunch or speculation. Not so in science. In science, the word theory refers to a comprehensive explanation of an important feature of nature supported by facts gathered over time.
Help plz this was due 2 days ago but I don’t understand it at all
Answer:
4 mile : 253440 inches
0.004 grams : 1.814 grams
56 miles/hour : 82.133 feet per second
4.5 ml : 0.45 centilitre
34.g/ml : 74.9571691 lb/liter
30 lb: 480 ounces
Explain how and why a drop of syrup can spread through the water in a beaker without stirring?
Answer:
See the answer below
Explanation:
A drop of syrup would spread through water because water molecules interact and dissolve the syrup molecules and the molecules of the syrup randomly diffuse into the water from the region of higher concentration to the region of lower concentration till they become evenly distributed in the water.
Once the molecules become evenly distributed into the water, an equilibrium is established and there is no longer net movement.
Read the following statement.
Changes must occur at a structural level in order to be considered chemical.
Which detail from the article provides the BEST example to support this statement?
A
For instance, a block of wood may feel rough when you run your finger across it but rubbing the wood with sandpaper smooths the surface so it no longer feels rough.
B
A piece of metal may be heated in a fire until it glows, but the metal is the same material before heating and after cooling.
C
Think about ice melting into water, and then water being heated up and turning into steam.
D
The creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
Answer:
D
Explanation:
A new substance must form in a chemical change. structure, properties and composition must change in a chemical change.
The creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
What is reaction?Reaction is defined as a process in which one or more substances are also called as reactant, are convert to one or more different substance known as product.
There are basically five types of reaction
Combustion reactionDecomposition reactionNeutralization reactionPrecipitation reactionSynthesis reactionA new reaction must have chemical change as well as physical change such as structure, properties and composition.
Thus, the creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances.
To learn more about reaction, refer to the link below:
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BRAINLIEST TO FIRST ANSWER I JUST NEED HELP my teacher refuses to help me so I just want to know im doing this right pretend the ones with slashes are fractions 0.56kg = ? mg 0.56kg x 1000 g/1 kg x 1000 mg/1 g = 560,000 mg bro im so confused also heres the problem if that's hard to understand i just want to know im doing it right
Answer:
0.56kg=?mg
0.56kg x (1000 g/1kg) X (1000mg/1g) = 560,000mg
Explanation:
You got it right. Great Job!
three examples of polysaccharides
Answer:
starch
Cellulose
glycogen
Hope this help :)
what is the radius of earth 6378000 meters in scientific notation
Answer:
[tex]6.378*10^{6}m[/tex]
Explanation:
we have zeroes so that can be
[tex]6378*10^{3} m[/tex]
and we can continue moving the decimal point three more times
[tex]6.378*10^{6}m[/tex]
what is burning considered ?
A. physical change
B.chemical change
C.none of the above
D.all of the above
Which of the following substances is more likely to dissolve in water? Which of the following substances is more likely to dissolve in water? HOCH2CH2OH O || CH3(CH2)9CH CCl4 CHCl3 CH3(CH2)8CH2OH
Answer:
HOCH₂CH₂OH
Explanation:
You generally assume that polar dissolves polar and nonpolar dissolves nonpolar. Since water is polar, we are looking for a polar molecular.
This cancels out CH₃(CH₂)₉CH and CCl₄.
You are left with CHCl₃, CH₃(CH₂)₈CH₂OH, and HOCH₂CH₂OH. You would pick the third option since it is the most polar.
The compound HOCH2CH2OH having two O - H groups is more likely to interact with water.
A substance is soluble in water if it is capable of interacting in an electrostatic interaction. Water can form hydrogen bonds with other molecules that posses polar O - H bonds.
Hence, looking at the options provided in the question, we will observe that the compound HOCH2CH2OH having two O - H groups is more likely to interact with water.
Learn more: https://brainly.com/question/9743981
What are 3 benefits of being a part of the microgrid?
Answer:
1.Improves electric reliability.
2.Enhance recovery.
3.Promotes clean energy.
Explanation:
Some people suffering from the darkness still had their lights from facilities with microgrids.Power outages they can be dangerous.Microgrids keep the power flowing by disconnecting.It also generate possibly batteries then the microgrids customers are served until power is restored on the Central grid.
A rock has a mass of 211 grams and occupies a volume of 72 centimeters cubed what is it density?
Answer:
Density = 2.9 g/cm³Explanation:
The density of a substance is given by
[tex]Density(\rho) = \frac{mass}{volume} [/tex]From the question
The mass of the stone is 211 g
It's volume is 72 cm³
Substitute the values into the above formula and solve for the density
That's
[tex]Density(\rho) = \frac{211}{72} [/tex]Density = 2.930
We have the final answer as
Density = 2.9 g/cm³Hope this helps you
How many millimeters (mm) are in 25 meters? Also, pick the choice that shows the correct math work.
O Q025 mm; because 25 m x
1 m
1.000 mm
= 0.025 mm
1.000 mm
O 25.000 mm; because 25 m x = 25,000 mm
1 m
25.000 mm; because 25 m X
100 mm
= 2500 mm
1 m
O 0.025 mm; because 25 m x
1 m
100 mm
= 0.25 mm
Answer:
25000 mm: because 25 m × 1000 mm /1 m = 25000 mm
Explanation:
We can convert 25 m to millimetre (mm) by doing the following:
Recall:
1 m = 1000 mm
Therefore,
25 m = 25 m × 1000 mm /1 m = 25000 mm
25 m = 25000 mm
Thus, 25 m is equivalent to 25000 mm
what is mean by exhaustible natural resources of list some
Answer:
enr are those resources which are present in limited quality and can be use completely used up by human activities are called enr .example coal petrol
What period is the atom in?
1.
What group is the atom in?
What is the name of this atom?
What other atom would have similar
properties to the atom?
Will this atom conduct electricity well?
Answer:
Put these atoms in order from most negative overall charge to least negative
overall charge.
11 Atom X: 104 protons, 102 electrons
11 Atom B: 24 protons, 18 electrons
1 Atom Q: 15 protons, 16 electrons
11. Atom P: 7 protons, 10 electrons
Explanation:
What period is the atom in?
1.
What group is the atom in?
What is the name of this atom?
What other atom would have similar
properties to the atom?
Will this atom conduct electricity well
explain the reason for classifying the periodic table into blocks
Answer:
The long form of the periodic table divides the elements into four major blocks known as s, p, d, and f.
The period to which a given element belongs can easily be determined from its electron configuration. Based on electron configurations, the periodic table can be divided into blocks denoting which sublevel is in the process of being filled.
Hope it helps.
An experiment looking at structures smaller than a cell would most likely employ a
a. dissecting microscope
b. transmission electron microscope
c. scanning electron microscope
d. compound light microscope
Answer:
In a conventional optical microscope, objects less than about 200 nanometers apart cannot be distinguished from one another. ... Although electron microscopes produce a detailed image of very small structures, they cannot provide an image of the proteins that make up those structures.
Answer:
b. transmission electron microscope
Explanation:
how many particles are their in 2.080 moles
Answer:
There are 1.253*10²⁴ particles in 2.080 moles
Explanation:
Avogadro's number is called the number of particles that make up a substance (usually atoms or molecules) that can be found in the amount of one mole. In other words, Avogadro's number is the number of molecules that one mole of any substance contains. Its value is 6.023 * 10²³ particles per mole.
So, you can apply a rule of three as follows: if 1 mole has 6.023*10²³ particles, then 2.080 moles, how many particles does it have?
[tex]amount of particles=\frac{2.080 moles*6.023*10^{23}particles }{1 mole}[/tex]
amount of particles= 1.253*10²⁴ particles
There are 1.253*10²⁴ particles in 2.080 moles
describe the energy inputs and outputs for the campfire. Use the law of conservation of energy to construct a valid qualitative equation that includes all the input and output energies involved.
Answer:
The essence including its particular subject is outlined in the following portion mostly on clarification.
Explanation:
The energy throughout the campfire comes from either the wood's latent chemical energy until it has been burned to steam up and launch up across the campfire. The electricity generation for something like a campfire seems to be in the context including its potential chemical energy which is contained throughout the firewood used only to inflame the situation.The energy output seems to be in the different types of heat energy radiating across the campfire, laser light generated off by the blaze, and perhaps a little number of electrical waves, registered throughout the firewood cracking whilst they combust throughout the blaze.and,
chemical energy ⇒ heat energy + light energy + sound energy
A graduated cylinder has 3.5 liters of oil. How many milliliters of oil is available in the graduated cylinder? O 3.5 mL O 3500 mL O 35 mL 350 mL
Answer:
3500 Ml
Explanation:
1 liter is equal to 1000 milliliters
3.5 liters is equal to 3500 milliliter
The water displacement method is used to find the mass of an
irregularly-shaped solid object.
Answer: True
Explanation:
I did the problem online
The mass and the density of the irregularly shaped objects can be measured and estimated by the water displacement method. Thus, the statement is true.
What is the water displacement method?The water displacement method has been defined as the method that measures and estimates the volume and mass of objects that are irregular in shape and can be done by submerging the object in a solution like water.
The water pushed out can be used to measure the mass and the volume of the object if the density is already known. It uses fluid displacement to measure the mass of irregularly shaped objects. Anyone quantity must be known so as to estimate the mass of the object.
Therefore, the statement about the water displacement method to calculate the mass of irregular shapes is true.
Learn more about the water displacement method, here:
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Your question is incomplete, but most probably your full question was, The water displacement method is used to find the mass of an irregularly-shaped solid object. (True or false)
Questions below :) These ones are fairly easy :P
Answer:
See below.
Explanation:
1. The water here is the solvent, and the 'sugar and fruit specific chemicals' are considered the solute. That is as the solute is the component dissolved in the solvent.
2. The collision theory states that the greater the collisions, the greater the rate of reaction. When powdered sugar is placed in the water (solvent) it occupies more surface area, resulting in more collisions that speed up the rate of reaction, compared to a cube of sugar - that occupies less surface area. Therefore, the powdered sugar dissolved faster.
3. Molarity describes the number of moles of a substance per unit of volume. The standard unit of volume is liter, giving you the standard units (mol/l). Molality describes the number of moles per unit of mass, typically kilograms (mol/kg).
The concentration of a solution can be given in moles of solute dissolved per kilogram of solvent for molality, and moles of solute dissolved in liters of solvent for molarity. Molality is generally used for concentration.
12 points
What's the difference between a hypothesis and a theory?
A. Theory" is another word for "fact;" "hypothesis" is another word for "guess."
B. Hypothesis can't be proven; theories can.
C. Theories have been confirmed through tests; hypotheses haven't.
D. Theories contain many hypotheses; a hypothesis only contains one theory.
Answer:
C. Theories have been confirmed through tests; hypotheses haven't.
Explanation:
In simple terms, a theory is something that has been studied, tested, and validated with results whereas a hypothesis is when one "guesses" or "assumes" about something with no prior tests. In short, a hypothesis can be best understood as just a proposal while theory can be taken as a validated result.
Through various trials and tests, a theory arrives whereas a hypothesis can be the initial stage of the testing. For example, in saying that "My hypothesis is that this metal cannot bend" is just assuming or expressing one's opinion. But when the metal is tested and a definite result is found, then that becomes a theory.
So, we can say that a theory is a confirmed result after tests while a hypothesis is not tested or confirmed with a definite result.
Thus, the correct answer is option C.
X
Which process is a chemical change?
A burning a match
B. boiling water
OC melting ice
OD. breaking glass
How does publishing in scientific journals help ensure that science leads to
reliable results?
Answer:
it helps prove the fact or opinion and test that and archive it
Find the density of a block with a length of 8.0 cm, a width of
4.0 cm, a height 2.0 cm, and a mass of 32 g. Would this block
float or sink in water?
Answer:
Density = 0.5 g/cm³Explanation:
Density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
From the question
mass = 32g
To find the density we must first find the volume of the block
From the question the block is a cuboid
Volume of cuboid = length × width × height
length = 8 cm
width = 4 cm
height = 2 cm
Volume of block = 8 × 4 × 2 = 64 cm³
Substitute the values into the above formula and solve for the density
That's....
[tex]Density = \frac{32}{64} \\ = \frac{1}{2} [/tex]
We have the final answer as
Density = 0.5 g/cm³
The block will float because it's density is less than the density of water which is
1 g/cm³
Hope this helps you
Answer:
d= 0.5 g/ cm³
The block will float in water.
Explanation:
The density of an object can be found using the following formula:
[tex]d=\frac{m}{v}[/tex]
where [tex]m[/tex] is the mass and [tex]v[/tex] is the volume. We know the block has a mass of 32 grams. We don't know the volume, therefore we must calculate it.
Let's assume the block is a cube. The volume of a cube can be found using the following formula.
[tex]v=l*w*h[/tex]
The length is 8 cm, the width is 4 cm and the height is 2 cm.
[tex]l= 8 cm \\w= 4cm \\h= 2cm[/tex]
[tex]v= 8 cm * 4 cm * 2cm[/tex]
[tex]v=32 cm^2 * 2cm[/tex]
[tex]v= 64 cm^3[/tex]
Now we know the volume and can substitute it into the formula, along with the mass.
[tex]d=\frac{m}{v}[/tex]
[tex]m= 32 g\\v= 64 cm^3[/tex]
[tex]d=\frac{32 g}{64 cm^3}[/tex]
Divide 32 grams by 64 cubic centimeters.
[tex]d= 0.5 g/cm^3[/tex]
The density of the block is 0.5 grams per cubic centimeter. The density of water is 1.0 g/cm³. Any object with a density that is less than 1 will float in water. 0.5 is less than 1, so this object will float in water.
what mass of silver has a volume of 105.0 cm^3? The density of silver is 10.50 g/cm^3
Answer:
mass = 1102.50 gExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
Making mass the subject we have
mass = Density × volumeFrom the question
Density of silver = 10.50 g/cm³
Volume = 105 cm³
Substitute the values into the above formula and solve for the mass
That's
mass = 10.5 × 105
We have the final answer as
mass = 1102.50 g
Hope this helps you
difference between speed and velocity
Answer:
speed is a scalar quantity and velocity is a vector quantity.
Speed is distance/time and velocity is displacement/time
Answer:
Velocity is vector and speed is scalar
Explanation:
7) All of the following are
external factors of the
photosynthesis EXCEPT*
O A. Light intensity
O B .Temperature
O c. Chlorophyll content
O D .Oxygen
Answer:
D. Oxygen
Explanation:
External factors of photosynthesis
Light intensityTemperatureChlorophyll contentCarbon dioxideImmediate product
GlucoseByproduct
OxygenHope this helps ;) ❤❤❤