Chemistry

Chemistry, 24.10.2019 00:00, eviepack

Which mathematical relationship should you use to convert moles of a substance into grams? mass in grams = number of moles · molar mass in g/mol mass in grams=number of molesmolar mass in g/mol mass in grams=molar mass in g/molnumber of moles mass in grams = molecular weight · molar mass in g/mol

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Chemistry, 28.09.2019 02:10, Sylnatius6736

4. al2o3 (s) + 6hcl (aq) → 2alcl3 (aq) + 3h20(1) find the mass of alcl3 that is produced when 10.0 grams of al2o3 react with 10.0 g of hci moar mass alqo3 102 gm imol al2o3 = 0.098 moles molar mass of hcl = 36, 5gr/mol #of moles #6l =0,274 moles mole of al2 oz 6 mol of hc 01274 x2 = 0.0913 moles alc3=13,5 6 i mass alco3 = 12, 193gm. 5. how many grams of the excess reagent in question 4 are left over?

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Chemistry, 09.10.2019 16:10, keaganaplin

Pressure and temperature affect the amount of space between gas molecules, which affects the volume and, therefore, the density of the gas since density=massvolume the molar mass of a substance, however, is a constant and can be used to identify an unknown gas sample. molar mass is found by dividing the mass of a sample (in grams) by the number of moles in that sample. the number of moles of gas can be calculated using the ideal gas law pv=nrt which can be rearranged as n=pvrt given the number of moles of a gas and its molar mass, you can calculate the mass of the gas. since density is equal to the ratio of the mass and volume, you can then divide by the volume to find density. alternatively, you can use the ratio n/v from the ideal gas equation where n is the number of moles and v is the volume, and convert from moles per unit volume to grams per unit volume using molar mass part a calculate the density of oxygen, o2, under each of the following conditions: stp 1.00 atm and 30.0 ∘c express your answers numerically in grams per liter. enter the density at stp first and separate your answers by a comma. view available hint(s) density at stp, density at 1 atma t m and 30.0 ∘c = nothing g/l part b to identify a diatomic gas (x2), a researcher carried out the following experiment: she weighed an empty 3.1-l bulb, then filled it with the gas at 1.20 atm and 25.0 ∘c and weighed it again. the difference in mass was 4.3 g . identify the gas.

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Chemistry, 25.10.2019 17:43, shekinahconnoll3904

If you are given the mass of a substance sample in grams, what is the first step you should take to determine how many representative particles are in that sample? find the molar mass of the substance convert the grams to particles convert the mass to moles convert the moles to particles

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Chemistry, 01.11.2019 19:31, smariedegray

How is stoichiometry used to calculate the mass of a substance? o a. unit conversion factors are used to convert between units of grams and moles. o b. oxidation numbers are used to convert from moles of one molecule to moles of another molecule. o c. subscripts in chemical formulas are used to calculate amounts of substances. o d. percent contributions are used to convert between molar mass and mass. submit

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