# How many grams of Co are there in a sample of Co that contains the same number of moles as a 45.6 gram sample of Cr?

The atomic weight of **Cr** is **52.0** g/mol

**1. Convert grams of Cr to moles of Cr:**

moles **Cr** = **45.6** g **Cr**1 mol = **0.877**
mol **Cr****52.0** g

**Multiply by moles per gram. Grams cancel out.**

The atomic weight of **Co** is **58.9** g/mol

**2. To convert 0.877 moles of Co to grams of Co:**

grams **Co** = **0.877** mol **Co****58.9** g =
**51.7** g **Co**

1 mol

**Multiply by grams per mole. Moles cancel out.**

**Note** that since the atomic weight of **Co** is
**larger** than the atomic weight of **Cr**, the mass of the
same number of moles is also **larger**.

### A sample of Se weighs 20.5 grams will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams?

A sample of Se weighs 20.5 grams. Will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams? (more, less): _______ Calculate the mass of a sample of V that contains the same number of atoms. _______ grams of V Answer: Since the atomic weight of V is smaller than the atomic weight of Se, each atom will have a smaller mass, and the sample will weigh…

### Which sample contains the greatest number of atoms a sample of Mn that contains 3.29E plus 24 atoms or a 5.18 mole sample of you?

Which sample contains the greatest number of atoms. A sample of Mn that contains 3.29E+24 atoms or a 5.18 mole sample of I? The sample of _____ contains the greatest number of atoms. Answer: In order to compare the two samples, it is necessary to express both quantities in the same units. Since the question was phrased in terms of atoms, it is convenient to convert moles of I to atoms of I. The conversion…

### How many grams of S are there in a sample of S that contains the same number of moles as a 96.3 gram sample of B?

The atomic weight of B is 10.8 g/mol 1. Convert grams of B to moles of B: moles B = 96.3 g B1 mol = 8.91 mol B10.8 g Multiply by moles per gram. Grams cancel out. The atomic weight of S is 32.1 g/mol 2. To convert 8.91 moles of S to grams of S: grams S = 8.91 mol S32.1 g = 286 g S 1 mol Multiply by grams per mole. Moles…

### Which sample contains the greatest number of atoms a sample of Al that contains 8.18E plus 23 atoms or a 5.16 mole sample of S?

Which sample contains the greatest number of atoms. A sample of Al that contains 8.18E+23 atoms or a 5.16 mole sample of S? The sample of______ contains the greatest number of atoms. Answer: In order to compare the two samples, it is necessary to express both quantities in the same units. Since the question was phrased in terms of atoms, it is convenient to convert moles of S to atoms of S. The conversion factor…

### How do you find the number of moles of each element in a compound?

Aside from a few of the ultra-high-molecular-weight polymers I can't imagine a single molecule that had a mole of anything in it. But since you asked... 1. Figure out how many grams a mole of the compound weighs. Easy one: a mole of water weighs 18 grams - two grams worth of hydrogen, 16 grams of oxygen. 2. Now determine the mass of the sample you have. Our sample has a mass of 990 grams…

### How do you calculate the amount of moles in a sample?

Assuming that you are trying to find the number of moles in an elemental sample, you would take the mass of the sample, and divide by the atomic weight of the substance. This will give you the number of atoms. You this divide this by Avogadro's number (6.0221415 x 1023). This will give you the number of moles in the sample. I even saw a mole once, but it was chased under the porch by…

### How many moles of atoms are there in 28 grams of methane CH4?

The formula for methane shows that each molecule of it contains 5 atom: 1 carbon atom and 4 hydrogen atoms. The gram molecular mass of methane is 16.04. Therefore, 28 grams of methane contains 28/16.04 moles of methane and 5 times this number, or 8.7, "moles of atoms", to the justified number of significant digits.

### Determine the empirical formula of the following compound if a sample contains 5.28g Sn and 3.37g F?

### When carbon is burned in the presence of oxygen the carbon and oxygen combine to prodon dioxide if you start w 6 grams of carbon and 16 grams of oxygen and they react completely how many grams of car?

the equation of this reaction is C + O2 = CO2 (s) (g) (g) according to this reaction 1mol of Carbon react with same number of moles of Oxygen. and this combination gives 1mol of CO2 as result. so first we have to find the number of moles in the weight we are going to use. 12 grams of carbon contains 1mol so 6 grams of carbon contains ( 1/12 )*6 = 0.5mol 32 grams…

### Number of moles and number of atoms in a 214 gram sample of silver?

A gram to mole conversion needs to have an atomic mass. Silver's atomic mass is 107.9 grams. You take the number of grams, multiply it by the number of moles (one in this case) and divide it by the atomic mass. 214 g Ag / (107.9 g) = 1.98 moles Ag Then you convert it to number of atoms. You can skip a step when converting grams to atoms if you have already calculated the…