3 years ago

Using the particle theory how do ice cubes form inside a freezer?

1 answer:

6 0

Answer:

The ice cube which was solid has turned into the liquid water because the air temperature is warmer than the freezers. Which means the ice particles gather heat energy from the warmer air. Therefore the ice particles have enough energy to break apart (melt)into smaller particle arrangements.

Explanation:

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HNO2+ F- <—> HF + NO2 in the reverse reaction HF is a/an

ANEK [815]

<span>In the reverse reaction HF is a reactant.</span>

8 0

3 years ago

How many moles of air are there in a human lung with a volume of 2.4 L at STP? Explain your answer

ollegr [7]

One mole of any gas at STP is about 22.4 liters (even for mixtures). This number comes from the ideal gas equation by setting n=1 and STP conditions:
V=nR/P =1 mole x 0.08206Latm/molK x 237K/1atm = 22.4L

so jsut divide: 893L/22.4L/mole = 39.9 moles

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3 years ago

The rate of disappearance of HBr in the gas phase reaction 2HBr(g) → H2 (g) I2 (g) is 0.190 M s-1 at 150°C. The rate of appearan

Sunny_sXe [5.5K]

Answer:

The rate of appearance of hydrogen gas is 0.095 M/s.

Explanation:

Rate of the reaction is the change in concentration of of any one of the reactants or products per unit time.

$2HBr(g)\rightarrow H_2 (g) I_2 (g)$