Please check each of these mole statements. Correct me if I'm wrong!

1. 59g of hydrochloric acid (HCL)=____moles
I got 1.6 moles

2. 4.6 moles of sodium hydroxide (NaOH)=___ grams
I got 184 grams

3. 35.0 of sulfuric acid (H2SO4)=__ f.u sulfuric acid
I got 2.15x10^25th power molecules

4. 3.4x10^24th power formula units of sodium chloride=____g
I got 330 g

5. 5.6 moles of calcium hydroxide=____g
I got 319 g

6. 1 magnesium atom=_____g
I got 3.986x10^-23rd power

1 is ok.

2 is ok but if your prof is picky about the number of significant figures you may want to adjust this.
3. Is that 35.0 GRAMS. If so I get the 2.15 but I don't agree with the exponent.
4 same comment about s.f.
5 I used 74 x 5.6 and didn't get 318
6. I used 24.3 and didn't get that. You must have used 24.

Remember that with problems like this answers can't agree unless both of us use the same set of numbers. It's always good when doing problems like this to show what numbers you used.

Let's go through each statement to check if the calculations are correct:

1. 59g of hydrochloric acid (HCl) = ____ moles
To find the number of moles, we can use the formula:

moles = mass / molar mass

The molar mass of HCl is approximately 36.5 g/mol. Therefore, dividing 59g by 36.5 g/mol gives us:

59g / 36.5 g/mol ≈ 1.62 moles

So the correct answer is approximately 1.62 moles, not 1.6 moles.

2. 4.6 moles of sodium hydroxide (NaOH) = ___ grams
To find the mass, we can use the formula:

mass = moles x molar mass

The molar mass of NaOH is approximately 40.0 g/mol. Therefore, multiplying 4.6 moles by 40.0 g/mol gives us:

4.6 moles x 40.0 g/mol = 184 grams

So the calculation for this statement is correct.

3. 35.0 g of sulfuric acid (H2SO4) = __ formula units of sulfuric acid
To find the number of formula units, we need to convert grams to moles using the molar mass of sulfuric acid. The molar mass of H2SO4 is approximately 98.1 g/mol. Therefore, dividing 35.0g by 98.1 g/mol gives us:

35.0g / 98.1 g/mol ≈ 0.357 moles

To convert moles to formula units, we can use Avogadro's number, which is approximately 6.022 x 10^23 formula units/mol. Multiplying 0.357 moles by 6.022 x 10^23 formula units/mol gives us:

0.357 moles x (6.022 x 10^23 formula units/mol) ≈ 2.15 x 10^23 formula units

So the answer is approximately 2.15 x 10^23 formula units, not 2.15 x 10^25 formula units.

4. 3.4 x 10^24 formula units of sodium chloride = ____ grams
To find the mass, we can divide the number of formula units by Avogadro's number and multiply it by the molar mass of sodium chloride. The molar mass of NaCl is approximately 58.5 g/mol. Therefore, dividing 3.4 x 10^24 formula units by 6.022 x 10^23 formula units/mol and multiplying it by 58.5 g/mol gives us:

(3.4 x 10^24 formula units) / (6.022 x 10^23 formula units/mol) x 58.5 g/mol ≈ 330.83 grams

Therefore, the answer is approximately 330.83 grams, not 330 grams.

5. 5.6 moles of calcium hydroxide = ____ grams
To find the mass, we can use the formula:

mass = moles x molar mass

The molar mass of Ca(OH)2 is approximately 74.1 g/mol. Therefore, multiplying 5.6 moles by 74.1 g/mol gives us:

5.6 moles x 74.1 g/mol ≈ 415.36 grams

The correct answer is approximately 415.36 grams, not 319 grams.

6. 1 magnesium atom = ____ grams
To find the mass of 1 magnesium atom, we need to know the atomic mass of magnesium in grams. The atomic mass of magnesium is approximately 24.3 g/mol. Therefore, we can divide 24.3 g/mol by Avogadro's number to find the mass of 1 magnesium atom:

(24.3 g/mol) / (6.022 x 10^23 atoms/mol) ≈ 4.04 x 10^-23 grams

So the calculation for this statement is correct.

To summarize:
1. 59g of hydrochloric acid (HCl) is approximately 1.62 moles, not 1.6 moles.
2. 4.6 moles of sodium hydroxide (NaOH) is 184 grams.
3. 35.0g of sulfuric acid (H2SO4) is approximately 2.15 x 10^23 formula units, not 2.15 x 10^25 formula units.
4. 3.4 x 10^24 formula units of sodium chloride is approximately 330.83 grams, not 330 grams.
5. 5.6 moles of calcium hydroxide (Ca(OH)2) is approximately 415.36 grams, not 319 grams.
6. 1 magnesium atom is approximately 4.04 x 10^-23 grams.