The "kilogram" was defined as the mass (not weight, but similar) of one liter of water (i.e. one cubic decimeter of water) at standard temperature and pressure. There are 1 thousand cubic decimeters in a cubic meter (or 1 million cubic centimeters), so a a cubic meter of water would have a mass of 1 million grams, or 1,000 kilograms, or 1 metric ton.
This value will change when the water is not at room temperature and normal atmospheric pressure.
This is why the kilogram definition is now related to a prototype made of iridium and platinium.
The molar mass of methane (CH4) is approximately 16.04 g/mol.
The molar mass of CaCN2 = 80.1021 g/mol
Atomic weight of carbon: [12,0096; 12,0116]. Atomic weight of chlorine: [35,446; 35,457]. The molar mass of chlorine is greater; rounded 35,45 g/mol.
To find the molar mass of methane (CH4), sum up the atomic masses of all the atoms in the molecule: (1 hydrogen atom x 4) + (1 carbon atom) = 4 g/mol (hydrogen) + 12 g/mol (carbon) = 16 g/mol. Therefore, the molar mass of methane (CH4) is 16 g/mol.
Well, isn't that just a happy little question! To find the percent by mass of carbon in C3H8, you first need to calculate the molar mass of carbon in C3H8, which is 3 times the molar mass of carbon. Then, you divide the molar mass of carbon by the molar mass of C3H8 and multiply by 100 to get the percent by mass. Just remember, there are no mistakes in chemistry, only happy accidents!
The molar weight of methane (CH4) is approximately 16.04 g/mol.
The molar mass of methane (CH₄) is approximately 16.04 g/mol.
The molar mass of methane (CH4) is approximately 16 g/mol.
The molar mass of methane (CH4) is approximately 16.04 g/mol.
The standard enthalpy of combustion for methane is -890 kJ/mol.
To find the number of moles in 0.289 g of methane, first calculate the molar mass of methane (CH4), which is approximately 16 g/mol. Next, divide the given mass (0.289 g) by the molar mass to obtain the number of moles. Therefore, 0.289 g of methane is equivalent to 0.289 g / 16 g/mol ≈ 0.018 moles of methane.
The molar mass of methane (CH4) is 16 g/mol. Therefore, four moles of methane would have a mass of 64 grams.
The molar mass of methane (CH4) is approximately 16.04 grams per mole.
The molar mass of CaCN2 = 80.1021 g/mol
I was using the formula that is molar mass/22.4 that results in g/l. My outcome for methane (CH4) was 16.0426/22.4= .7162 g/L. I wanted that result in g/ml so after converting the units i came to the answer of .000716 g/ml. Keeping in mind that these calculations were at Standard temperature and pressure. 1atm and 25 degrees celcius. Can anybody give me feedback and let me know that this information is correct?
The atomic (molecular) weight of a substance is its molar mass.
The molar weight of H2O (water) is approximately 18.015 g/mol.