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likoan [24]
3 years ago
15

Pls help fast!!! Test due soon!

Chemistry
2 answers:
vova2212 [387]3 years ago
8 0

Answer:

14

Explanation:

the number of protons (17) -the atomic mass (27) = 14 which is the number of electrons

Firlakuza [10]3 years ago
4 0

Answer:

13

Explanation:

your wellcome

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0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unkno
AnnZ [28]

Answer:

56 %

Explanation:

The percent dissociation of a weak acid can be defined as:

Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%

We are given all the required data to <u>calculate the percent dissociation</u>:

0.42 mol / 0.75 mol * 100 % = 56 %

The percent dissociation is 56%.

3 0
3 years ago
Match the following associations. 1. + ΔHexothermic endothermic 2. E2 &lt; E¹exothermic endothermic 3. energy is absorbed exothe
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Explanation:

When heat is absorbed by reactants in a chemical reaction then the reaction is known as endothermic reaction.

Whereas when heat is released by reactants in a chemical reaction then the reaction is known as exothermic reaction.

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2. When E_{2} < E_{1}, this means energy of products is less than the energy of reactants. Therefore, it is exothermic in nature.

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4 0
3 years ago
Empirical Formula of P3O4H2?
puteri [66]

Answer:

H2 P4 O1. Explanation: In order to calculate the Empirical formula , we will assume that we have started with 10 g of the compound.

Explanation:

3 0
3 years ago
Consider the following reaction where Kp = 2.01 at 500 K: PCl3(g) + Cl2(g) PCl5(g) If the three gases are mixed in a rigid conta
alekssr [168]

Explanation:

Kp remains constant (if T=const.).

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B. Kc > Qc then 1,3 are T. 2,4,5 are F.

C. Qp > Kp then 1.3.4 are T. 2,5 are F.

7 0
4 years ago
Brainliest get's +20 points!
gizmo_the_mogwai [7]

Answer:

i think thats correcr!

Explanation:

6 0
3 years ago
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