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2 years ago

12

PLZ HELP IT BEING TIMED!!!!!! PLZ ANSWER!!!!!

1 answer:

Wittaler [7]2 years ago

6 0

Answer:

YIKES. a bit late. Answers include 1, 2, 3

Explanation:

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Please help me out !!

raketka [301]

27Hq)+3816(7/ 23q09)

8 0

2 years ago

Which of the following compounds are soluble in aqueous solutions? Select ALL that are soluble.

sattari [20]

<h3>Answer:</h3>

K₂S
CaSO₄ (slightly soluble in water)
Pb(ClO₄)₂

<h3>Explanation:</h3>

Mg(OH)₂ and CoCO₃ are insoluble in water.
Solubility rules are used to determine whether a compound will be soluble or not soluble in aqueous form.
K₂S is soluble in aqueous solutions as all salts of Potassium are soluble in water.

Calcium (ii) sulfate is slightly soluble in water.
Hydroxides are insoluble in water except, KOH, NaOH and NH₄OH.and Barium hydroxide. Therefore, Mg(OH)₂ is an insoluble hydroxide.

CoCO₃ is insoluble since carbonates are insoluble except K₂CO₃, Na₂CO₃ and (NH₄)₂CO₃. .

Pb(ClO₄)₂ is soluble because all perchlorates are soluble.

7 0

3 years ago

Use what you know about relative dating to choose the correct answers from the drop-down menus. Ethan determines that layer B is

AURORKA [14]

Answer: yes

Explanation: no

5 0

2 years ago

Read 2 more answers

Where does the force that helps sediment become sedimentary rock come from?

Sidana [21]

Answer:

I think it's compaction I'm not sure

5 0

2 years ago

Read 2 more answers

Does anyone know the answers for these

Alexeev081 [22]

Answer: 1. 0.045moles

2. 2.10 grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

1. $\text{Number of moles of zinc nitrate}=\frac{8.51g}{189.36g/mol}=0.045moles$

2. Mass of $C_2H_4=moles\times {\text {Molar mass}}=0.075moles\times 28.05g/mol=2.10g$

4 0

2 years ago