1. Calculate formula mass
Calcium carbonate has chemical formula CaCO3.
Its formula mass is 40.1 + 12.0 + 3(16.0) = 100.1
2. Apply formula to calculate number of moles of CaCO3
Amount of CaCO3
= mass/formula mass
= 50/100.1
= 0.50mol
Dissolve 50 g of potassium carbonate in 100 mL of water at 20 0C.
2.02atm
It would seem that because calcium and oxygen are in equal molar ratio for this compound that it would be 50 percent. But that is incorrect, because they each have differing molar masses. Oxygen has a molar mass of 16.000 and calcium has a molar mass of 40.078. So calcium is 40.078/56.078, which is 71.47 percent.
The formula of (unhydrated) barium nitrate is Ba(NO3)2. This means, among other things, that each mole contain one mole of barium atoms, two moles of nitrogen atoms, and six moles of oxygen atoms. Thus, the molar mass of this compound is 137.327 + 2(14.007) + 6(15.999) = 261 grams, to three significant digits. 50 moles will then be fifty times this or 1.3 kilograms, to the justified number of significant digits.
The daily recommended intake of calcium for both male and female adults 19-50 years of age is 1,000 mg or 1 gram. Experts suggest that individuals in their teens and twenties, especially women, should be sure to get enough calcium during this time due to the fact that this is the period that calcium bone deposition begins to decline.
Carbonatite is an igneous rock composed of more than 50% Calcium Carbonate.
This number is 50 atoms.
1.503 x 10 ^ 24 atoms
we know, 50 mM = 50/1000 moles per litre = 0.05 moles no. of moles = weight in grams/ weight of one mole weight of one mole of sodium acetate (CH3COONa) = 83g per mole no. of moles = 50/1000 = 0.05 moles thus weight in grams = 0.05*83 = 4.15 g
CaCO3+ 2 HNO3 = Ca(NO3)2+H2CO3Molecular Weight 100 206Weight's) 50 xAnswer:x = 206*50/100 = 103 g
it contains at least 50% calcium carbonate it has cracks and joints it is permeable (allows water to past through)
CaCO3 -----> CaO + CO2 - Calcium carbonate has a MWt of 100 so 50 g is half a mole so 0.5 moles of CaO MWt 56 and so 28g produced and Carbon Dioxide is MWt 44 so 22g produced.
Calcium is 40g per mole (according to the periodic table,) so 50/40=1.25 moles.
Silica.
The salt used to construct bone is ...Hydroxyapatite (calcium phosphate and calcium carbonate)Other than the salt, which is 50% of the bone, it is also 25% water, and 25% collagen fibers, which are what gives bone its tensile strength.
To convert grams to moles you need mercury's atomic mass: 200.59 grams/mole. You can then take your measurement and divide it by the atomic mass to get moles.Grams ÷ Atomic mass = Moles50.15 grams ÷ 200.59 grams = 0.2500 moles Hg
0.758 moles of NH3 is the amount of moles in 50 grams of NH42SO4.