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uysha [10]
3 years ago
15

Melting water is an example of a physical change because (3 points)

Chemistry
1 answer:
ladessa [460]3 years ago
3 0
The water changes state.
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An ethylene gas torch requires 300 L of gas at 0.8 atm. What will be the pressure of the gas if ethylene is supplied by a 200.0
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Answer:

1.2 atm

Explanation:

Given data

  • Volume of the gas in the tank (V₁): 200.0 L
  • Pressure of ethylene gas in the tank (P₁): ?
  • Volume of the gas in the torch (V₂): 300 L
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If we consider ethylene gas to be an ideal gas, we can find the pressure of ethylene gas in the tank using Boyle's law.

P_1 \times V_1 = P_2 \times V_2\\P_1 = \frac{P_2 \times V_2}{V_1} = \frac{0.8atm \times 300L}{200.0L} = 1.2 atm

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The specific heat of aluminum is 0.897j/(g•°C). If a 22.6 g sample of aluminum is heated from 25°C to 250°C, then how much heat
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Q=mcat

=(22.6)(.897)(250-25)

4,561.245 or 4.5 * 10^-3

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How many moles of atoms are contained in 15.7 g of Bromine
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15.7 g / 79.9 g = 0.196 moles of atoms
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Explanation:

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