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IrinaK [193]
3 years ago
6

What is the difference between magma and lava?

Chemistry
1 answer:
arlik [135]3 years ago
7 0

Answer:

the answer is A. Magma is molten rock within the earth; Lava is molten rock on the earth's surface

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Iron filings can be separated from a mixture with sulfur by using a magnet.
lbvjy [14]
The answer is A. True
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3 years ago
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If 20 grams of Zinc phosphate reacts with excess hydrochloric acid and produces 18 grams of Zinc chloride what is the percent yi
fenix001 [56]

Answer:

Y=85\%

Explanation:

Hello!

In this case, since we know the balanced chemical reaction, we are first able to realize there is a 1:3 mole ratio between zinc phosphate and zinc chloride; it means that we can first compute the moles of the desired product via stoichiometry:

n_{ZnCl_2}=20gZn_3(PO_4)_2*\frac{1molZn_3(PO_4)_2}{386.11gZn_3(PO_4)_2}*\frac{3molZnCl_2}{1molZn_3(PO_4)_2}=0.16gZnCl_2

Next, since those moles are associated with the theoretical yield of zinc chloride, we obtain the corresponding mass:

m_{ZnCl_2}^{theoretical}=0.16molZnCl_2*\frac{136.29gZnCl_2}{1molZnCl_2} =21gZnCl_2

Finally, we compute the percent yield by diving the actual yield (18 g) by the theoretical yield:

Y=\frac{18g}{21g}*100\%\\\\Y=85\%

Best regards!

4 0
3 years ago
Cells, Cell Division)
zalisa [80]

Answer:

c is wrong

Explanation:

8 0
3 years ago
If 25 mol of C8H18 are available, how many mol of CO2 can be produced
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Answer:

200 mol

Explanation:

2C8H18+25O2=16CO2+18H2O

2 mol → 16 mol

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X=25×16÷2=200

7 0
3 years ago
What is the mass of a rectangular cube with dimensions of 3 cm x 2 cm x to 10 cm and a density of 10 g/cm^3
marta [7]

d=m/V so m=Vd

m=60cm^3 * 10g/cm^3=600g

3 0
3 years ago
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