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Alisiya [41]
3 years ago
14

Density Practice

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
4 0

Answer:

1) mass and volume

2)  float.

3) Sink

4) Apples

5) Cannonball

Explanation:

1) Density is based on the mass and volume of a material.

2) A material or an object with low density than water or liquid tends to float.

3) A material or an object with high density than water or liquid tends to sink.

4) The apples in the water have less density as they are floating in the water.

5) The cannonball is more dense than the ocean water and the ball sink in the less density water.

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a 3.50L sample of neon gas has a pressure of .950atm at 20c what would the volume be if the pressure increased to 1.50atm and th
ehidna [41]

Answer:

V_2=2.22L

Explanation:

Hello,

In this case, we use the Boyle's law which allows us to understand the volume-pressure behavior as an inversely proportional relationship:

P_1V_1=P_2V_2

Thus, solving for the final volume, once the pressure changes, we obtain:

V_2=\frac{P_1V_1}{P_2}=\frac{3.50L*0.950atm}{1.50atm}  \\\\V_2=2.22L

Best regards.

8 0
4 years ago
Explain why a total lunar eclipse appears red.<br> I
DochEvi [55]

Answer:

During a total lunar eclipse, the Earth lies directly between the sun and the moon, causing the Earth to cast its shadow on the moon.

Explanation:

4 0
3 years ago
A combustion reaction occurs between one molecule of methane (CHa) and two molecules of oxygen (O2).
SCORPION-xisa [38]

The total number of atoms make up the products :

D) 1 carbon, 4 hydrogen, and 4 oxygen

<h3>Further explanation </h3>

Complete combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.

If O₂ is insufficient there will be incomplete combustion produced by CO and H and O

Hydrocarbon combustion reactions (especially alkanes)

For combustion of methane (CH₄) and two molecules of oxygen (O₂).

\tt CH_4+2O_2\rightarrow CO_2+2H_2O

The number of atoms make up the products

CO₂ : 1 carbon, 2 oxygen

2H₂O : 4 hydrogen , 2 oxygen

4 0
3 years ago
Copper was the first metal to be produced from its ore because it is the easiest to smelt, that is, to refine by heating in the
Ganezh [65]

Answer:

57.48%

Explanation:

Calculate the mass of 1 mole of malachite:

MM Cu = 63.55

MM O = 16.00

MM H = 1.01

MM C = 12.01

(Cu_{2}(OH)_{2}CO_{3})

A mole of malachite has:

2 moles of Cu

5 moles of O

2 moles of H

1 mole of C

MW Malachite = 2*MM(CU) + 5*MM(O) + 2*MM(H) + 1 *MM(C)

MW Malachite = 2*63.55 + 5*16.00 + 2*1.01 + 1*12.01

MW Malachite = 221.13

Mass of Cu in a mole of Malachite = 2*MM(CU) = 127.1

Now divide the mass of Cu by the mass of Malachite

%Cu = \frac{127.1}{221.13} =0.5748=57.48%

7 0
4 years ago
A substance that is made up of two or more elements is called ____.
Art [367]
A compound or a mixture.
If it is two or more elements are mixed, it is a mixture. If two or more elements are chemically reacted, it is a compound ( example FeS)
Hope this helps.  
6 0
3 years ago
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