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Katyanochek1 [597]
3 years ago
11

Beryllium, magnesium and calcium all are located in the alkaline earth group. Which of these characteristics do these elements h

ave in common? A) They each have similar densities. B) They each have a similar melting point. C) They each form similar compounds when combined with oxygen. D) They each have their valence electrons in the same energy level.
Chemistry
1 answer:
Elanso [62]3 years ago
4 0
<h2>Its <u>(C)</u> I guessed it and got it wrong just so I can give the answer away.</h2>
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CaCO3 → CaO + CO2 Calculate the theoretical yield of Calcium Oxide if 24.8 grams of Calcium Carbonate decomposes. Calculate the
RideAnS [48]

Answer:

Theoretical yield: 13.9 g

Percent yield: 94 %

Explanation:

The reaction is:

CaCO₃ → CaO + CO₂

We see that the reaction is correctly balanced.

1 mol of calcium carbonate can decompose to 1 mol of calcium oxide and 1 mol of carbon dioxide.

We convert the mass to moles: 24.8 g . 1mol / 100.08g = 0.248 moles

As ratio is 1:1, 0.248 moles of salt can decompose to 1 mol of oxide.

We convert the moles to mass: 0.248 mol . 56.08g /1mol = 13.9 g

That's the theoretical yield.

To determine the percent yield we think:

(Determined yield / Theoretical yield) . 100 → (13.1 / 13.9) . 100 = 94 %

5 0
2 years ago
Science problem please help
masha68 [24]
The answer to your question number 5 is b
8 0
3 years ago
Read 2 more answers
Fill the three 3d subshells with the specified number of electrons.
lana66690 [7]

1. 5 electrons.

3d^{5}

  • Therefore, the 3d subshells blanks will be like this:
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2. 6 electrons.

3d^{6}

  • The 3d subshells blanks will be:
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3. 7 electrons.

3d^{7}

  • The 3d subshells blanks will be:
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Hope you could understand.

If you have any query, feel free to ask.

8 0
2 years ago
Noin
OLga [1]

Answer:

Gravity is the answer.

5 0
3 years ago
Can anyone help me with any of the questions
Dafna11 [192]
Use the chart to help you look carefully at the numbers and the volumes to figure the questions out hope this helps
7 0
3 years ago
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