Density Practice
Answer the following questions about density.
1) Density is based on the
and the
of a material
2) A material with a low density tends to
I
3) A material with a high density tends to
4) Bobbing for apples is a game where people try to bite apples from a bucket of water. While in the
water, the apples float. Which is less dense, the apples or the water?
5) A cannonball rolls off of a pirate ship and sinks to the bottom of the ocean. Which was more dense, the
cannonball or the ocean water?

Answer:

20

Explanation:

The atomic number is just the number of protons in an atom. So if the atom has 20 protons, the atomic number is also 20.

Answer:

What letter on the graph corresponds to both liquid water and steam? D

Explanation:

Liquid water exists between 0 and IOO degrees Celcius.

Answer:

1.2 miles

Explanation:

Answer:

Yes , covalency fails to explain the formation of BeCl₂ and PCl₅.

Explanation:

covalent bonds are formed between two atoms  by sharing of outermost electrons in order to attain octet for attaining stability . To octet means to attain 8 electrons in their outermost orbit .

BeCl₂ :

Be has two electrons in its outermost orbit and each of Cl has 7 electrons .

Each of Cl shares one electron each with each of two electrons of Be . Cl atoms attain 8 electrons as octet . But Be attains only 4 electrons ( 2 of Be and 2 from Cl atoms ) . Hence octet of Be is not attained . So covalency fails in the formation of BeCl₂ .

PCl₅ :

P has 5 electrons in the outermost orbit . Each of these electrons shares with one  electron from  each of Cl atoms . Thus Cl attains octel state ( 8 electrons ) but P attains 10 electrons ( 5 + 5 ) , 5 of P and 5 from 5 Cl atoms .

Hence Octet of P is not attained . Hence covalency fails in the formation of PCl₅ .

Answer:

The calorie is a unit of energy widely used in nutrition. For historical reasons, two main definitions of calorie are in wide use. The small calorie or gram calorie (usually denoted cal) is the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin). The large calorie, food calorie, or kilocalorie (Cal, calorie or kcal) is the amount of heat needed to cause the same increase in one kilogram of water. Thus, 1 kilocalorie (kcal) = 1000 calories (cal). By convention in food science, the large calorie is commonly called Calorie (with a capital C by some authors to distinguish from the smaller unit). In most countries, labels of industrialized food products are required to indicate the nutritional energy value in (kilo or large) calories per serving or per weight.

Explanation:

Answer:

different versions of existing forms

Explanation:

Answer:

A. Able to be lost or gained in chemical reactions.

Explanation:

Only electrons are lost or gained.

Able to be lost or gained in chemical reactions. Hence, option A is correct.

An atom contains a central nucleus surrounded by one or more electrons.

A chemical reaction is not created or destroyed, it simply moves electrons from one atom to another, and does not change the nucleus of the atoms. The total mass of the matter remains conserved in any chemical change.

Hence, option A is correct.

Learn more about atoms here:

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Answer:

5.22 x 10^-5

Explanation:

5.22 x 10^-3 x 10^-2 = 5.22 x 10^-5

Answer:

A box

Explanation:

In quantum mechanics, the atom is metaphorically described as a box. In fact, the Schrödinger wave equation is based on the three dimensional box metaphor of the atom.

Thus, a box provides a convenient treatment of the atom as it represents the fundamental components of the problem of atomic structure, hence the answer.

C. A box

Thus, the correct option is C.

Learn more:

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Answer:

The final volume of gas is 9.19 L.

Explanation:

Given that,

Volume = 10.0 L

Initial pressure = 1.50 atm

Final pressure = 1240 mmHg

We need to calculate the final volume of gas

Using formula of ideal gas

[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]

[tex]V_{2}=\dfrac{P_{1}V_{1}}{P_{2}}[/tex]

Where, P₁ = initial pressure

P₂ = final pressure

V₁ = initial volume

Put the value into the formula

[tex]V_{2}=\dfrac{1.50\times10\times760}{1240}[/tex]

[tex]V_{2}=9.19\ L[/tex]

Hence, The final volume of gas is 9.19 L.

Answer:

1.  C

2.  C

3.  A

4.  C

5.  True

6.  C

Explanation:

1. C  The answer is conduction because the heat was transferred through direct contact.

2. C  The answer convection because the heat was transferred through a medium (liquid/gas).

3. A  The answer is conduction because the heat was transferred through direct contact.

4. C  The answer is radiation because the heat was transferred through thermal emission.

5. True.  This is because the air that is warmed rises, causing the cool air to replace it.  You can picture it like the scenario in question 2.

6. C  

Answer:

b

Explanation: i did the quiz

Answer:

Explanation:i’m not sure.

Answer:

We write 50,000 in scientific notation,

it is written as 5 x 10⁴.

Hope it helps.

Answer: 5×10^4

Explanation:

scientific notation: a×10^b, where should be 0<a<10

Step 1. Count the zeros

There are in total 4 zeros in 50000, so we write the exponent as 10^4

Step 2. Look at the number left

The number left is 5, which technically should be the [a] in the expression. But first, we need to check whether or not is it in the proper range of [a].

0<5<10, is it true? YES

So the final expression should be 5×10^4

Hope this helps!! :)

Please let me know if you have any question

Answer:

15,000 mg

Explanation:

1 gram=1000 mg

15 gm=15,000 mg

chemical potential energy, thermal energy, electrical energy, sound energy

Explanation:

the coal is chemical potential energy because it is just sitting there, the coal fueled power plant is thermal energy because it is using the heat from the coal to work the power plant, that is then turned into electrical energy, which then goes to the radio which displays sound energy

Answer:

Plastic is a insulator that is why it is used

Explanation:

So wires or metal is a conductor and if you put a conductor as coating then it will conduct plastic coating is for protection because it does not conduct electricity or let it pass through that is why you don't get shocked but if coating was metal then it would conduct and you would get shocked.

Answer:

plastics don't conduct any electricity whatsoever, so plastic is actually used in a wide variety of applications where their insulating, or "protecting" properties are needed. PVC is the most common insulator for electric wiring, I know, because my dad's friend works in electrical and that's what he mainly uses in his line of work, but anyway. yeah, so, plastic materials such as PVC also helps with the prevention of electrical shock. obviously if you were to touch a bare electrical wire you would either be in for a long hospital stay or a coffin. lol um so yeah materials such as PVC are very good and are always used in electrical wiring to not only prevent electrical shock, but to also to provide an insulator and is good for use in high temperatures.

~hope i helped uwu n have a nice rest of ur day~

lots of love,

    lee

Answer: one thing you may notice when you touch metal is a small electric shock, and depending on the temperature, it could be hot, or cold.

Answer:

It can mean "boardwalk" or a "board of a school."

~Mia Sedillo~

Answer:

A. discuss the issue with your instructor.

Explanation:

If a lab experiment is not completed then one should discuss it with their instructor because instructor guides how to perform the experiment and also gives instructions to avoid any mis-happening during experiment.

No one should perform any experiment without their instructor in school or college as it can be dangerous to experiment with chemicals or other experimental devices without any supervision.

Hence, the correct option is "A".

Answer:the cation can't be drived from an acid

Explanation:

Example

HCL+MgOH2=MgCl2+H2O

The cation in the salt magnesium chloride is magnesium which is derived from the base and the anion chlorine from the acid hydrochloric acid. The same is true in water.

Please can you add as brainleist please!!!!!!!!!!!!!!!!!!!!

Answer:

Explanation:

The density of a substance can be found by using the formula

From the question

mass of air = 1.2 g

volume = 4,555 mL

Substitute the values into the above formula and solve for the density

That's

= 0.0002634

We have the final answer as

Hope this helps you

The "super-hot" earth's core is important because it generates the magnetic field around the earth. it also helps control evolution.

Answer:

An increase in temperature will result in increase in the average kinetic energy of the reacting particles(atoms). Which will therefore increase the frequency of their collision....

Using collision theory

The reaction rate increases......

Answer:

A Law

Explanation:

A scientific law talks about a law which has been observed and found to be always true but does not explain the reason behind it or the underlying causes which makes such an event to occur.

For example the law of conservation of energy states that energy can neither be created or destroyed, but can be converted from one form to another or transferred from one object to another.

In this law there is no reason why this happens and doesn’t state the causative factors.

Your question has been heard loud and clear.

Both scientific laws and scientific theories are not based on hypothesis.

Because , scientific laws are proven and so they are real not hypothetical.

Whereas scientifc theories can be hypothetical.

Thank you

Answer:

liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation and separation of various components of crude oil. This method works because the liquids in the mixture have different boiling points.

Explanation:

please give 5 star

Answer:

c. 32.0 mL

Explanation:

Buret can measure upto one tenth of a mL . That means it can measure upto one decimal point of a mL . Out of given measurement 32.0 mL reads upto one decimal point of mL so this reading seems to be the reading taken of a liquid in a buret.

Answer:

FDA

Explanation:

Answer:

FDA

Explanation: it right ;)

Answer:

CO2 (g)

Explanation:

In solids the interatomic or intermolecular space is least . It is most pronounced in gases . That is why inter molecular or interatomic attraction is least in gases . That is why gas flows .

Hence , when we try to compress a gas , due to inter molecular space , it is most likely to get compressed . It will be least compressed when we try to compress a solid because of lack of intermolecular space .