Answer :
Final answer:
To convert 70 grains of KNO3 to grams, multiply by the conversion factor 0.06479891 grams/grain. To convert grams of KNO3 to moles, divide by the molar mass of KNO3 (101.1 grams/mole).
Explanation:
To convert 70 grains of potassium nitrate (KNO3) to grams, we need to know that 1 grain is equal to 0.06479891 grams. So 70 grains is equivalent to:
70 grains x 0.06479891 grams/grain = 4.5379287 grams (rounded to 4.54 grams)
To convert grams of KNO3 to moles, we need to know the molar mass of KNO3, which is approximately 101.1 grams/mole. Therefore:
4.54 grams x (1 mole/101.1 grams) = 0.0448 moles (rounded to 0.045 moles)
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https://brainly.com/question/16248089
To convert 70 grains of potassium nitrate to grams, multiply by 0.06479891 to get 4.5359237 grams. Then, using the molar mass of KNO3 (101.1 g/mol), divide the mass in grams by the molar mass to get approximately 0.04487 moles of KNO3.
The question asks for the conversion of grains of potassium nitrate (KNO3) to grams and then to moles of KNO3. The first step is to know the conversion factor from grains to grams. It is widely accepted that 1 grain is equal to 0.06479891 grams. Using this conversion, we can calculate the mass of 70 grains of KNO3 in grams:
70 grains * 0.06479891 grams/grain = 4.5359237 grams of KNO3
Next, to convert grams to moles, we need to use the molar mass of KNO3, which is the sum of the atomic masses of potassium (K), nitrogen (N), and three oxygen (O) atoms. The molar mass of KNO3 is approximately 101.1 g/mol. Now we can find the number of moles of KNO3:
Moles of KNO3 = mass (g) / molar mass (g/mol) = 4.5359237 grams / 101.1 g/mol ≈ 0.04487 moles of KNO3
