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melamori03 [73]
3 years ago
9

How many valence electrons does each of the following atoms have?

Chemistry
1 answer:
Zolol [24]3 years ago
6 0
Which atoms?  ~~~~~~~~~~~~~~~~~~~~~~~~~`
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Calculate the mass percent of oxygen in CO2<br> (Work shown)
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Answer:

mass \: of \: CO _{2}  = (12 + (16 \times 2)) = 44 \: g \\ mass \: of \: oxygen \: in \: CO _{2} = (16 \times 2) = 32 \\ \% \: of \: oxygen =  \frac{32}{44}  \times 100\% \\  = 72.7\%

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The volume of an irregular solid can be found from its displacement in a known volume of water.
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The volume of an irregularly shaped solid can be determined from the volume of water it displaces. A graduated cylinder contains 19.9 mL of water. When a small piece of galena is added, it sinks and the volume increases to 24.5 mL

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3 years ago
Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.
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Sodium phosphate is chemical compound composed of atoms connected with chemical bonds.

Pure substance is made of only one type of atom (element) or only one type of molecule (compound), it has definite and constant composition with distinct chemical properties.

Pure substances can be separated chemically, not physically, that is difference between pure substances and mixtures.

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What is an advantage of using natural gas rather than a coal burning power plant?
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Answer:

I hope it helps u

Explanation:

The advantages of using natural gas rather than coal are the following,

  • Natural gas is present in large amount than coal.
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6 0
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