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k0ka [10]
3 years ago
15

I need help PLEASEEEEEEEEEEEEEEE 20 points baes

Chemistry
1 answer:
Kryger [21]3 years ago
7 0

not sure but h = hydrogen and o = oxygen

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How many water molecules are in a block of ice containing 0.500 mol of water (H2O)?
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Answer:

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Explanation:

Step 1: Given data

Moles of water (n): 0.500 mol

Step 2: Calculate the molecules of water present in 0.500 moles of water

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Is paper catching on fire a physical or chemical change?
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What is the molarity of a solution of 4.50 g
Andrews [41]

Answer:

M = 0.23 M

Explanation:

Given data:

Molarity of solution = ?

Mass of NH₄Br = 4.50 g

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Solution:

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Formula:

Molarity = number of moles of solute / L of solution

Number of moles of NH₄Br:

Number of moles = mass/molar mass

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What is the physical state of element chromium
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Answer:

Solid metal.

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3 years ago
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