Gases<span> in the </span>atmosphere<span> such as carbon dioxide </span>do<span> what the roof of a </span>greenhouse does. Earth's<span> surface warms up in the sunlight. At night, </span>Earth's surface cools, releasing the heat back into the air. The gases involved in the greenhouse effect are carbon dioxide<span>, </span>methane<span>, </span>nitrous oxide<span>, </span>halocarbons<span>, chlorofluorocarbons, </span>water vapor<span>, and </span>ozone<span>. These gases are all in Earth's atmosphere.</span>
Answer:
The mass percent of gold in the rock is 2.500 %
Explanation:
Step 1: Data given
Mass of the rock = 12000 grams
Mass of gold = 300.0 grams
Step 2: Calculate mass %
Mass % = mass of gold / mass of gold
Mass % = (300.0 grams / 12000 grams) * 100 %
Mass % = 2.500 %
The mass percent of gold in the rock is 2.500 %
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Answer:
Substance 1 and 3.
Explanation:
The following data were obtained from the question:
Substance >>>>> chemical formula
1 >>>>>>>>>>>>>> C2H6O
2 >>>>>>>>>>>>>> C8H18
3 >>>>>>>>>>>>>> CH3CH2Br
4 >>>>>>>>>>>>>> C4H10O
Next, we shall determine the number of carbon in each substance as follow:
Substance 1 (C2H6O):
Number of carbon atom = 2
Substance 2 (C8H18)
Number of carbon atom = 8
Substance 3 (CH3CH2Br)
Number of carbon atom = 1 + 1 = 2
Substance 4 (C4H10O)
Number of carbon atom = 4
From the above illustrations,
Substance 1 and 3 has the same number of carbon atom
The answers is 67 don’t ask me I don’t know but trying to get free points
