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liq [111]
2 years ago
8

I really need help with the first two fill in the blanks

Chemistry
1 answer:
postnew [5]2 years ago
3 0
Not sure about the first one , but the second one is ONE
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How many electrons does an atom of chromium have
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Answer: 24 electrons
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3 years ago
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What is the average atomic mass of hafnium given the following abundance information on the isotopes?
Goryan [66]

Answer:

178.55

Explanation:

176 × 0.05+ 177 × 0.19 + 178 × 0.27 + 179 × 0.14 + 180 × 0.35 = 178.55

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2 years ago
A chemical equation does not give information about what
Lana71 [14]

A chemical equation does not give information about the following:

  • It usually does not give the "state of the substances". There are three states: Solid(s), liquid(q) and gas(vap).
  • The chemical equation does not show whether it is complete or incomplete.
  • The "speed of the reaction" is not mentioned.
  • The "concentration of the substance" whether it is diluted or concentrated is not mentioned.
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3 years ago
How is a pair of molecular orbitals formed?
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When two atoms combine, the overlap of their atomic orbitals produces molecular orbitals. 
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3 years ago
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Look at the equation CO2 + H2 = CO + H20.
sergejj [24]

Answer:

CO is considered as a product.

Explanation:

A general chemical equation for a combination reaction follows:

To write a chemical equation, we must follow some of the rules:

The reactants must be written on the left side of the direction arrow.

A '+' sign is written between the reactants, when more than one reactants are present.

An arrow is added after all the reactants are written in the direction where reaction is taking place. Here, the reaction is taking place in forward direction.

The products must be written on the right side of the direction arrow.

A '+' sign is written between the products, when more than one products are present.

For the given chemical equation:

are the reactants in the reaction and  are the products in the reaction.

Hence, CO is considered as a product.

3 0
2 years ago
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