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Tanya [424]
3 years ago
12

Which of these is an example of a physical change? Question options: melting a substance breaking chemical bonds forming chemica

l bonds nuclear decay
Chemistry
2 answers:
bogdanovich [222]3 years ago
8 0
Breaking chemical bonds
kherson [118]3 years ago
4 0
Your answer is Breaking chemical bonds. Hope this helps
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a weather balloon is filled with 200L of helium at 27 degree Celsius and 0.950 atm. What would be the volume of the gas at -10 d
Charra [1.4K]

<u>Answer:</u> The volume when the pressure and temperature has changed is 1332.53 L

<u>Explanation:</u>

To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law. The equation follows:

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1,V_1\text{ and }T_1 are the initial pressure, volume and temperature of the gas

P_2,V_2\text{ and }T_2 are the final pressure, volume and temperature of the gas

We are given:

P_1=0.950atm\\V_1=200L\\T_1=27^oC=[273+27]K=300K\\P_2=0.125atm\\V_2=?L\\T_2=-10^oC=[273-10]K=263K

Putting values in above equation, we get:

\frac{0.950atm\times 200L}{300K}=\frac{0.125\times V_2}{263K}\\\\V_2=1332.53L

Hence, the volume when the pressure and temperature has changed is 1332.53 L

5 0
3 years ago
An experiment is carried out to determine how different pH values of soil will affect the growth of tomato
Aleks [24]

Answer:

How high the plants grow in the different soils.  

Explanation:

The dependent variable is what happens as a result of what the experimenter changes.  

The experimenter could measure how high the plants grow when placed in soil with different pH values.

5 0
4 years ago
Why is hexane soluble in methanol
kap26 [50]
Hexane<span> would be non-polar and since water is a polar solvent it wouldn't be </span>soluble<span>in water. ... Because it is totally non polar while water is exactly the opposite being very polar. The old saying says like </span>dissolves<span> like. </span>
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Which of the following best describes how an electron moves when it absorbs or releases exact amounts of energy?
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B.The electron moves between orbital levels.
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3 years ago
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What is the name of the compound CrPO4 • 5H2O?
aksik [14]
Chromium phosphate pentahydrate
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3 years ago
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