mole & gram conversion (elements)
step 1) find the molar mass. step 2) if grams desired, take moles and multiply by molar mass. if moles desired, take grams and divide by molar mass.
a. how many grams are in 4.5 moles of aluminum (al)?
(molar mass of al is 26.98 g/ mole)
4.5 moles × 26.98 grams/moles = 121.41 grams al
b) how many moles are in 90 grams of phosphorus (p)?
(molar mass of p is 30.97 g/ mole)
90 grams × moles/30.97 grams = 261.54 moles p
1) how many moles are in 125 grams of silver (ag)?
2) how many grams are in 5.4 moles of copper (cu)?
3) how many moles are in 50 grams of neon (ne)?
4) how many grams are in 120 moles of calcium (ca)?
5) how many moles are in 30 grams of phosphorus (p)?
6) how many grams are in 38 moles of chromium (cr)?
7) how many moles are in 35 grams of cobalt (co)?
8) how many grams are in 300 moles of arsenic (as)?
9) how many moles are in 20 grams of phosphorus (p)?

Question

Accepted Answer

### Problem 1: How many moles are in 125 grams of Silver (Ag)?
# Explanation:
## Step1: Recall the formula for moles from grams.
The formula is $ \text{Moles} = \frac{\text{Grams}}{\text{Molar Mass}} $. The molar mass of Ag is 107.87 g/mol.
## Step2: Substitute the values into the formula.
We have 125 grams of Ag. So, $ \text{Moles} = \frac{125\ \text{g}}{107.87\ \text{g/mol}} \approx 1.16\ \text{mol} $.
# Answer:
Approximately 1.16 moles.

### Problem 2: How many grams are in 5.4 moles of Copper (Cu)?
# Explanation:
## Step1: Recall the formula for grams from moles.
The formula is $ \text{Grams} = \text{Moles} \times \text{Molar Mass} $. The molar mass of Cu is 63.55 g/mol.
## Step2: Substitute the values into the formula.
We have 5.4 moles of Cu. So, $ \text{Grams} = 5.4\ \text{mol} \times 63.55\ \text{g/mol} = 343.17\ \text{g} $.
# Answer:
343.17 grams.

### Problem 3: How many moles are in 50 grams of Neon (Ne)?
# Explanation:
## Step1: Recall the formula for moles from grams.
The formula is $ \text{Moles} = \frac{\text{Grams}}{\text{Molar Mass}} $. The molar mass of Ne is 20.18 g/mol.
## Step2: Substitute the values into the formula.
We have 50 grams of Ne. So, $ \text{Moles} = \frac{50\ \text{g}}{20.18\ \text{g/mol}} \approx 2.48\ \text{mol} $.
# Answer:
Approximately 2.48 moles.

### Problem 4: How many grams are in 120 moles of Calcium (Ca)?
# Explanation:
## Step1: Recall the formula for grams from moles.
The formula is $ \text{Grams} = \text{Moles} \times \text{Molar Mass} $. The molar mass of Ca is 40.08 g/mol.
## Step2: Substitute the values into the formula.
We have 120 moles of Ca. So, $ \text{Grams} = 120\ \text{mol} \times 40.08\ \text{g/mol} = 4809.6\ \text{g} $.
# Answer:
4809.6 grams.

### Problem 5: How many moles are in 30 grams of Phosphorus (P)?
# Explanation:
## Step1: Recall the formula for moles from grams.
The formula is $ \text{Moles} = \frac{\text{Grams}}{\text{Molar Mass}} $. The molar mass of P is 30.97 g/mol.
## Step2: Substitute the values into the formula.
We have 30 grams of P. So, $ \text{Moles} = \frac{30\ \text{g}}{30.97\ \text{g/mol}} \approx 0.97\ \text{mol} $.
# Answer:
Approximately 0.97 moles.

### Problem 6: How many grams are in 38 moles of Chromium (Cr)?
# Explanation:
## Step1: Recall the formula for grams from moles.
The formula is $ \text{Grams} = \text{Moles} \times \text{Molar Mass} $. The molar mass of Cr is 52.00 g/mol.
## Step2: Substitute the values into the formula.
We have 38 moles of Cr. So, $ \text{Grams} = 38\ \text{mol} \times 52.00\ \text{g/mol} = 1976\ \text{g} $.
# Answer:
1976 grams.

### Problem 7: How many moles are in 35 grams of Cobalt (Co)?
# Explanation:
## Step1: Recall the formula for moles from grams.
The formula is $ \text{Moles} = \frac{\text{Grams}}{\text{Molar Mass}} $. The molar mass of Co is 58.93 g/mol.
## Step2: Substitute the values into the formula.
We have 35 grams of Co. So, $ \text{Moles} = \frac{35\ \text{g}}{58.93\ \text{g/mol}} \approx 0.59\ \text{mol} $.
# Answer:
Approximately 0.59 moles.

### Problem 8: How many grams are in 300 moles of Arsenic (As)?
# Explanation:
## Step1: Recall the formula for grams from moles.
The formula is $ \text{Grams} = \text{Moles} \times \text{Molar Mass} $. The molar mass of As is 74.92 g/mol.
## Step2: Substitute the values into the formula.
We have 300 moles of As. So, $ \text{Grams} = 300\ \text{mol} \times 74.92\ \text{g/mol} = 22476\ \text{g} $.
# Answer:
22476 grams.

### Problem 9: How many moles are in 20 grams of Phosphorus (P)?
# Explanation:
## Step1: Recall the formula for moles from grams.
The formula is $ \text{Moles} = \frac{\text{Grams}}{\text{Molar Mass}} $. The molar mass of P is 30.97 g/mol.
## Step2: Substitute the values into the formula.
We have 20 grams of P. So, $ \text{Moles} = \frac{20\ \text{g}}{30.97\ \text{g/mol}} \approx 0.65\ \text{mol} $.
# Answer:
Approximately 0.65 moles.

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QUESTION IMAGE

Question

Explanation:

Problem 1: How many moles are in 125 grams of Silver (Ag)?

Step1: Recall the formula for moles from grams.

Step2: Substitute the values into the formula.

Step1: Recall the formula for grams from moles.

Step2: Substitute the values into the formula.

Step1: Recall the formula for moles from grams.

Step2: Substitute the values into the formula.

Answer:

Problem 2: How many grams are in 5.4 moles of Copper (Cu)?