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2 years ago

Grtdggddgdggrsggrgrgd

Chemistry

1 answer:

n200080 [17]2 years ago

7 0

Answer:

wut??

Explanation:

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The homologous chromosomes form fairs.

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How many molecules are there in 31.8 moles of water?

Murljashka [212]

Answer:

$31.8\ moles = 1.91 * 10^{25}\ molecules$

Explanation:

Given

31.8 moles of water

Required

Determine the number of molecule

In standard units: 1 molecule of water is:

$1\ mole = 6.022 * 10^{23}\ molecules$

Multiply both sides by 31.8

$31.8 * 1\ mole = 31.8 * 6.022 * 10^{23}\ molecules$

$31.8\ moles = 31.8 * 6.022 * 10^{23}\ molecules$

$31.8\ moles = 191.4996 * 10^{23}\ molecules$

Express 191.4996 as a standard form

$31.8\ moles = 1.914996 * 10^2 * 10^{23}\ molecules$

Apply law of indices:

$31.8\ moles = 1.914996 * 10^{2+23}\ molecules$

$31.8\ moles = 1.914996 * 10^{25}\ molecules$

Approximate:

$31.8\ moles = 1.91 * 10^{25}\ molecules$

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A student inflates a balloon with helium then places it in the freezer. The student should expect

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Answer:

The frozen balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.

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What is the chemical name for Iridium(V) Oxide?

goblinko [34]

Answer: Iro2

Explanation:

Iro2 compound name

Iridium(IV) oxide

Names

Chemical formula IrO2

Molar mass 224.22 g/mol

Appearance blue-black solid

Density 11.66 g/cm3

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