Please answer all of the questions 1. There are moles in 9.01 x 10^23 atoms.

none of the above

15

0.150

1.50

2. How many sulfur atoms are present in 41.8 moles of sulfur?

Question 2 options:

2.52 x 10^25 S atoms

6.94 x 10^29 S atoms

1.44 x 10^24 S atoms

4.18 x 10^25 S atoms

3.How many moles would 1.00 x 10^23 molecules of methane (CH4) represent?

Question 3 options:

1.66 moles

0.166 moles

0.0166 moles

none of the above

4.How many moles of iron (Fe) are in a sample of 7.91 x 10^23 atoms of iron?

Question 4 options:

1.31 mol Fe

0.761 mol Fe

7.91 mol Fe

47.6 mol Fe

5.How many oxygen atoms are present in 2.28 moles of nitric acid, HNO3?

Question 5 options:

7.39 x 10^23 O atoms

4.119 x 10^23 O atoms

4.12 x 10^24 O atoms

1.37 x 10^24 O atoms

Which is a characteristic of mixtures?

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume