Question

How many grams of ammonia (NH3) are there in 1.19 mol of the compound?

What is the mass (in grams) of 9.23 × 1024 molecules of methanol (CH3OH)?

How many atoms of phosphorus are in 8.20 mol of copper(II) phosphate?

How many moles of N are in 0.215 g of N2O?

Answer #1

Grams of ammonia (NH3) are there in 1.19 mol of the compound:

mole= weight / Molecular weight

weight= mole x molecular weight= 1.19 mol x 17 g/mol=
**20.23 g is the weight of ammonia.**

the mass (in grams) of 9.23 × 1024 molecules of methanol (CH3OH):

1 mole of methanol = 6.022 x 10^{23} molecules of
methanol

X mole of methanol= 9.23 × 10^{24} molecules of
methanol

so, after cross multiplication X= 15.327 moles of methanol

use, mole= weight / Molecular weight

weight= mole x molecular weight= 15.327 mol x 32.04 g/mol =
**491.077 g of methanol**

1.A chemist requires 0.240 mol Na2CO3 for a reaction. How many
grams does this correspond to? 2.How many grams of potassium oxide
(K2O) are there in 0.502 moles? 3.How many moles of carbon monoxide
(CO) are in 18.3 g of the compound? 4.How many atoms are there in
80.3 g of potassium dihydrogen phosphate (KH2PO4)? 4.A sample of
C3H8 has 9.52 × 1024 H atoms. How many carbon atoms does the sample
contain and What is the total mass of...

1)
are present in 3.12 moles of
carbon monoxide ?
atoms of carbon.
2. How many MOLES of oxygen are present in 8.18×1021molecules of carbon monoxide ?
moles of oxygen.
1. How many MOLECULES of phosphorus trichloride are present in 4.17 moles of this compound ?
molecules.
2. How many MOLES of phosphorus trichloride are present in 9.62×1022 molecules of this compound
?
moles.
2)
1. How many ATOMS of carbon are present in 5.72 grams ofcarbon
monoxide ? atoms...

1. How many grams of fructose (molar mass = 180.16 g/mol) are
there in 7.240 x 1024 fructose molecules?
2. How many grams is 5.584 moles of
Cu3(PO4)2?

1- How many grams of H2S contain the same number of molecules as
13.9 g of BH3?
2- how many moles of n atoms are contained in 12 mol n2o5?
3- Refer to the periodic table and determine how many grams of
sulfur contain the same number of atoms as 8.99 grams of
phosphorus.
________g

1) How many grams of NH3 can be produced from 4.48 mol of N2 and
excess H2.
Express your answer numerically in grams.
2) How many grams of H2 are needed to produce 11.93 g of
NH3?
Express your answer numerically in grams.
3)How many molecules (not moles) of NH3 are produced from
4.38×10−4 g of H2?
Express your answer numerically as the number of molecules.

(a) How many moles of ammonium ions are in 0.552 g of ammonium
carbonate? mol
(b) What is the mass, in grams, of 0.0279 mol of iron(III)
phosphate? g
(c) What is the mass, in grams, of 4.98 1023 molecules of
aspirin, C9H8O4? g
(d) What is the molar mass of a particular compound if 0.087 mol
weighs 6.48 g? g/mol

What is the formula for copper(II) phosphate? Capitalization and
punctuation count!
How many atoms of phosphorus are in 5.40 mol of copper(II)
phosphate?

1)How many moles of N are in 0.237 g of N2O?
2)What is the average mass of a single phosphorus atom in
grams?
3)A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is
its empirical formula?
4)The molecular mass of the compound is 132 amu. What is the
molecular formula?

(a) How many moles of ammonium ions are in 0.807 g of ammonium
carbonate?
(b) What is the mass, in grams, of 0.0445 mol of iron(III)
phosphate?
(c) What is the mass, in grams, of 2.48 1023 molecules of
aspirin, C9H8O4?
(d) What is the molar mass of a particular compound if 0.060 mol
weighs 5.34 g?

hydrogen gas, H2, reacts with nitrogen gas,N2, to form
ammonia gas , NH3 according to the equation...
3H2+N2 --->2NH3
1.how many grams of NH3 can be produced from 3.42 mol
of N2 and excess H2
2. how many grams of H2 are needed to produce 14.93 g of NH3
?
3. How many molecules (not moles) of NH3 are produced from
6.04*10^-4 g of H2 ?

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