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

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.