The empirical formula of styrene is CH; the molar mass of
styrene is 104.14 g/mol.
How...
The empirical formula of styrene is CH; the molar mass of
styrene is 104.14 g/mol.
How many H atoms are present in a 4.825g sample of styrene? ___ H atoms
(Give your answer in e format. For example 12014 = 1.2014e+05)
A compound with the empirical formula CH2 has a molar mass of 98
g/mol. What is the molecular formula for this compound? 2-A
compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its
empirical formula? 3-The molecular mass of the compound is 132 amu.
What is the molecular formula? 4What is the empirical formula of a
compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and
77.39% oxygen (O) by mass? 5What is the empirical formula...
1. The molar mass of a compound is 126 g/mol, and it's empirical
formula is C2H2O. What is compound's molecular formula?
2. A compound consist of 26.18g Si and 29.82g O. Calculate its
empirical formula?
3. Calculate the empirical formula of the compound that consist
of 70.4%F and 29.6%O.
Styrene's empirical formula is CH. What mass of styrene contains
4.61 × 1021 atoms of carbon? The molar mass of styrene
is 104 g/mol.
A. 0.0995 g
B. 0.796 g
C. 0.0612 g
D. 0.0919 g
E. 0.00766 g
How many moles of hexachlorobenzene,
C6Cl6, are in 4.05 g of
C6Cl6?
A. 0.0142 mol
B. 0.0293 mol
C. 0.0189 mol
D. 1.15 × 103 mol
E. 0.0563 mol
ow many molecules are there in 122 g of benzoic acid,
C7H6O2?...
Chem Question - Gases
Molar Mass N = 14.01 g/mol
Molar Mass H2O = 18.016 g/mol
Vapor Pressure of Water at 25 C is 23.76 torr
Vapor Pressure of Water at 65 C is 187.54 torr
(Show all work and calculations, include units in
answer. If calculations must be used in several parts, rounding
should be made to 6 decimal points to ensure accuracy. Final
Answers can be rounded to 3 decimal points.)
A syringe filled with air can be...
The formula for methane is CH4 and it’s molar mass is
16.04 grams/mol.
(a) How many moles of methane are in 2.750 grams of methane?
(b) How many molecules of methane are in a 11.5 mole sample?
How many g of MgCl2 (molar mass = 95.21 g/mol) have to be
dissolved to give 100 g of an aqueous solution that boils at 101.50
degree C?
A) 279g
B) 27.9g
C) 95.2g
D) 93.0g
E) 9.30g
Ethanol, C2H5OH (molar mass = 46 g/mol) is mixed with methanol,
CH3OH (molar mass = 32 g/mol) to make an ideal solution at a given
temperature. If 5.00 g of ethanol and methanol are mixed, what is
the resulting vapor pressure of the solution? (the vapor pressure
at the same temperature for pure ethanol is 44.5 mm Hg and pure
methanol is 88.7 mm Hg)