Chloral hydrate has the formula <span>C2H3Cl3O2
mass of carbon : 12
mass of Cl : 35.5
mass of hydrogen : 1
mass of oxygen : 16
So, molar mass of chloral hydrate = 2(12) + 3(1) + 3(35.5) + 2(16) = 165.5 gm
1 mole contains </span><span>6.02 x 10^23 molecules
Thus, mass of one molecule = 165,5 / (</span><span>6.02 x 10^23) = 2.75 x 10^-22 gm
therefore, mass of 500 molecules is equal to:
500 x 2.75 x 10^-22 = 1.37 x 10^-19 gm</span>
Answer:
Explanation:
Mole = no. Molecules/6.02×10^23
Mole = (2.4×10^25)/(6.02×10^23)
Mole = 39.87mole
Molar mass of NaHCO3 is
= 23 + 1 + 12 + 3(16)
= 84g/mol
Mole = mass/molar mass
Mass = Mole × molar mass
Mass = 39.87 × 84
Mass= 3348.84g
Answer:
The answer to your question is 330 g of CHO
Explanation:
Data
Calories needed = 2200 kcal/day
CHO = 60%
Proteins = 15%
Fats = 25%
Grams of carbohydrates needed = ?
Process
1.- Calculate the number of calories in 60% of 2200 kcal
2200 kcal ---------------- 100%
x --------------- 60%
x = (60 x 2200) / 100
x = 1320 kcal
2.- Calculate the grams of CHO
1 g of CHO ---------------- 4 kcal
x ---------------- 1320 kcal
x = (1320 x 1) / 4
x = 1320/4
x = 330 g of CHO