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pogonyaev
2 years ago
5

You have a substance with a length of 2 cm, width of 3 cm, and a height of 4 cm. Its density is known to be .5 g/cm3. What is th

e mass of the sample you have?
Chemistry
1 answer:
borishaifa [10]2 years ago
4 0

Answer:

12 grams

Explanation:

D = m/V

0.5g/cm^3 = m/(2*3*4)

\frac{0.5g}{cm^3} = \frac{m}{24cm^3}

m = 12g

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Lead can be prepared from galena [lead(II) sulfide] by first roasting the galena in oxygen gas to form lead(II) oxide and sulfur
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Answer:

a) Step 1:

2PbS(g)+3O_2(g)\overset{roasting}\rightarrow 2PbO(s)+2SO_2(g)

Step 2:

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Explanation:

a)

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Step 1:

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2PbS(g)+3O_2(g)\overset{roasting}\rightarrow 2PbO(s)+2SO_2(g)..[1]

Step 2:

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Balanced equation of step 2:

2PbO(s)+PbS(s)\overset{\Delta }\rightarrow 3Pb(l)+SO_2(g)..[2]

b)

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3PbS(s)+3O_2(g)\rightarrow 3Pb(l)+3SO_2(g)

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hope that helped</span>
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