3 years ago

How are the number of protons represented in the periodic table?

Chemistry

2 answers:

Vadim26 [7]3 years ago

6 0

Answer:

Explanation:

Sav [38]3 years ago

5 0

Answer:

The atomic number represents the number of protons

Explanation:

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A 10.0 gram sample of Fe contains how many miles of Fe

Dafna1 [17]

Answer:

1.7857 moles

Explanation:

moles=mass/Mr

10/56=1.7857

moles of iron =1.7857

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2 years ago

Make a good chain with arrows include these organisms white shark,bacteria,kelp,sun,sea urchin,otter

MakcuM [25]

Sun to kelp

kelp to sea urchin

sea urchin to otter

otter to shark

kelp,sea urchin,otter,shark to bacteria

bacteria back to kelp

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2 years ago

For the reaction represented by the equation  2Fe + O2 → 2FeO, how many moles of iron oxide will be produced from 8.00 mol of ir

STatiana [176]

Answer:

8.00 moles.

Explanation:

The ratio of Fe to FeO is 2:2 = 1:1, so 8 moles are produced.

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3 years ago

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AnnyKZ [126]

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3 years ago

How many grams of CaCl₂ should be dissolved in 500.0 mL of water to make a 0.20M solution of CaCl₂?

Butoxors [25]

0.2M means 0.2mol CaCl2/1L solution.

This question didn't give us a density of the solution so needs an assumption that the solution has equal volume to water.

xmol/0.5L=0.2M
x = 0.1

0.1mol of CaCl2 is needed. Ca=40g/mol, Cl=35.5g/mol.
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8 0

3 years ago