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2 years ago

What is an atomic number

Chemistry

2 answers:

klemol [59]2 years ago

8 0

Answer:

the number of protons is called the atomic number

hope it helps you buddy

denis23 [38]2 years ago

4 0

Answer: number of protons in an atom

Explanation:

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How many atoms of Mg are present in 97.22 grams of Mg?

Hitman42 [59]

Answer:

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Explanation:

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3 years ago

Need Help On This...Thanks

ollegr [7]

13) "..From the ___" My guess would be Sun since it says solar later in the question. Then an example of solar energy would be flashlights, thermostats (etc..)

14) Mechanical

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2 years ago

You are riding a bicycle. If you apply a forward force of 125 N, and you and

GenaCL600 [577]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

When 8 moles of lithium metal react with excess oxygen gas, how many moles of lithium oxide can be produced? 4Li + O2 → 2Li2O

IgorLugansk [536]

4li + o2 ----> 2li2o
8 x

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2 years ago

Read 2 more answers

Write balanced net ionic equations and the corresponding equilibrium equations for the stepwise dissociation of the triprotic ac

Elza [17]

Answer:

$H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^{-}(aq); \ Ka_1$

$H_2PO_4^{-}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^{-2}(aq); \ Ka_2$

$HPO_4^{-2}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^{-3}(aq); \ Ka_3$

Explanation:

Hello!

In this case, since the phosphoric acid is a triprotic acid, we infer it has three stepwise ionization reactions in which one hydrogen ion is released at each step, considering they are undergone due to the presence of water, thus, we proceed as follows:

$H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^{-}(aq); \ Ka_1$

$H_2PO_4^{-}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^{-2}(aq); \ Ka_2$

$HPO_4^{-2}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^{-3}(aq); \ Ka_3$

Moreover, notice each step has a different acid dissociation constant, which are quantified in the following order:

Ka1 > Ka2 > Ka3

Best regards!

3 0

2 years ago