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4 years ago

How many moles are in 9.8 grams of calcium

Chemistry

1 answer:

elixir [45]4 years ago

3 0

Answer:

0.24 moles.

Explanation:

number of moles = mass of sample /mass of 1 mole

9.8g /40.08g = 0.2445 moles <3

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What do you know about Relative Dating

gizmo_the_mogwai [7]

<span>it tells you the sequence in which events occurred, not how long ago they occurred.</span>

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3 years ago

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Bond [772]

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Explanation:

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3 years ago

Given the following balanced equation, determine the rate of reaction with respect to [O2]. If the rate of formation of O2 is 7.

murzikaleks [220]

Answer: The rate of the loss of $O_3$ is 0.52M/s

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

$2O_3(g)\rightleftharpoons 3O_2(g)$

Rate of disappearance of $O_3$ = $-\frac{1d[O_3]}{2dt}$

Rate of formation of $O_2$ = $+\frac{1d[O_2]}{3dt}$

$-\frac{1d[O_3]}{2dt}=+\frac{1d[O_2]}{3dt}$

Rate of formation of $O_2$ = $7.78\times 10^{-1}M/s$

Thus Rate of disappearance of $O_3$ = $\frac{2d[O_2]}{3dt}=\frac{2}{3}\times 7.78\times 10^{-1}M/s=0.52M/s$

8 0

4 years ago

Can somebody give me a simple answer for this question

erik [133]

Answer:

The electron cloud keeps the surronds the atom like abubble and the orbit is what the electrons go around

Explanation:

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3 years ago

What is the mass of 5.35×1021 platinum atoms?

inysia [295]

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4 years ago