2 years ago

The rate at which a chemical reaction occurs cannot be changed. (True or False)

Chemistry

1 answer:

frozen [14]2 years ago

8 0

The answer is false.

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A copper atom has a mass of 1 06 times 10^-22 g and a penny has a mass of 2.5 g. Use this information to answer the questions be

amm1812

Answer:

Mass of 1 mole of copper is 63.83 g.

0.03916 moles of copper atoms have a mass equal to the 2.5 grams of copper penny.

Explanation:

Mass of 1 copper atom,m = $1.06\times 10^{-22} g$

$1 mole = 6.022\times 10^{23} atoms$

Mass of 1 mole of copper :

= $6.022\times 10^{23} atoms\times 1.06\times 10^{-22} g=63.83 g$

Mass of 1 mole of copper = 63.83 g

Mass of copper penny = 2.5 g

Atomic mass of copper = 63.83 g/mol

Moles of copper in 2.5 g of copper penny:

$\frac{2.5 g}{63.83 g/mol}=0.03916 mol$

0.03916 moles of copper atoms have a mass equal to the 2.5 grams of copper penny.

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3 years ago

What five elements make up 99% of living things

MA_775_DIABLO [31]

Answer:

oxygen, carbon, hydrogen, nitrogen, and sulfur

Explanation:

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2 years ago

At sea level, a kilogram weighs approximately:

Marysya12 [62]

The answer would be b, or 2

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3 years ago

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1. Patient is admitted with neck injury which has resulted in a loss of function in their thyroid.

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3 years ago

Does anyone know what Hydrogen's oxidation state would be if it was acting as an anion non-metal?

Ilia_Sergeevich [38]

Answer:

yeah,The oxidation state of an atom does not represent the "real" charge on that atom, or any other actual atomic property.Hydrogen has OS = +1, but adopts −1 when bonded as a hydride to metals or metalloids. Oxygen in compounds has OS = −2. This set of postulates covers .

Explanation:

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2 years ago