classify the materials based on their composition rock, clear liquids, peppercoms, concrete, salt, oxygen, birdseed, plant
1 answer:
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Answer:
1) 262 grams
Explanation:
Mg = 24.305g
O = 16g
H = 1
24.305 +2(16)+2(1) = 58.305 g
×
Answer: -
0.0583 g and 2.064 x 10²⁰ molecules of ammonia are released when a commercial refrigeration unit accidentally releases 7.68 x 10¹ mL of ammonia gas at STP
Explanation: -
Volume of ammonia gas released = 7.68 x 10¹ mL
= 76.8 mL
=
= 0.0768 L
We know that at STP standard temperature and pressure,
22.4 L of a gas has 6.02 x 10²³ molecules of ammonia.
0.0768 L of a gas is occupied by
= 2.064 x 10²⁰ molecules of ammonia
Molar mass of NH₃ = 14 x 1 + 1 x 3 = 17 g.
At STP, we know
22. 4 L of ammonia has 17 g of ammonia.
0.0768 L of ammonia has
=0.0583 g of ammonia.
∴ 0.0583 g and 2.064 x 10²⁰ molecules of ammonia are released when a commercial refrigeration unit accidentally releases 7.68 x 10¹ mL of ammonia gas at STP
Answer:
,
,
,
Explanation:
The four most abundant minerals in the continental crust are, ,
,
,
.
The percentages are
is called quartz
is called corundum
is called calcium oxide or quick lime
is called magnesium oxide or magnesia