Question

how many grams of P4 (123.88g/mol) would contain the same number of atoms as 154 g S8 (256.48 g/mol)?

which of the foloowing will lead to an increase in the kinetic energies of photoelectrons emitted when the light is incident on metal surface?

Answer #1

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

How many grams of sodium contain the same number of atoms as
12.4 g of potassium? Using correct significant figures.

In the production of iron metal, a mixture of 228g P4 (MW=154
g/mol) and 205g Cl2 (MW=71 g/mol) are heated together the following
reaction takes place to form PCl5 (MW=208 g/mol): P4(g)+10
Cl2(g)---> 4PCl5(g).
a) what is the limiting reactant?
b) How many grams of PCl5 can be produced?
c) If 157 g of Pcl5 is actually obtained what is the percent
yield of the reaction?

1- How many moles of N2O5 contain the same number of nitrogen
atoms as exactly 19 mol of NO2?
2- How many grams are contained in 0.900 mol of calcium
phosphate, Ca3 (PO4)2?
3- Ga
Number of electrons =_______ electrons
Number of protons = _________protons
4- element number 79
Number of electrons = _____electrons
Number of protons = ______protons
5- What are the symbol and name for an element whose average
atoms have a mass that is 59.6% of the...

1.
How many grams are contained in 2.00 mol of neon atoms
2. Calculate the number of moles of sulfur represented by
1.81x10 24exponent atoms of sulfur
3. 3.4x10-5exponent moles of Na2co3 to grams

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...

13. Aluminum oxide
a. a MW of 101.96 g/mol. How many
moles of ALUMINUM would be in 10200 g aluminum oxide?
b. a MW of 101.96 g/mol. How many grams of
aluminum oxide would be in 100 moles aluminum oxide?
c. a MM of 102 g/mol. How many
oxygen atoms would be in 204 g aluminum oxide?
d. What is the mass of oxygen in 204 g aluminum
oxide?

How many grams of calcium gluconate (MW = 430) will contain the
same number of milliequivalents of calcium as 2 10-grain tablets of
calcium lactate (MW = 218)? Round your final answer to the nearest
thousandth.

1. How many moles of atoms are contained in 21.0 g of
Br2 ?
2. 1.28 x 1024atoms of S. (Calculate the number of
grams)
3. How many atoms are contained in (5 molecules
CH3COOH) and (12.0 mol H2O)
4. calculate the number of grams of hydrogen in 8.44 mol
H2SO4
5. A. What is the element of ( 65.2 g sample of a
compound containing 36.8 g silver, 12.1 g chlorine, and the rest,
oxygen)
B. compound containing 38.0...

16. How many liters of a 2.5% solution of sucrose would contain
the same number of grams of sugar as 3.75 L of a 6.0% sucrose
solution?
17. A hydrated compound has an analysis of 18.29% Ca, 32.37% Cl
and 49.34% H2O. What is its formula?
18. Antibiotics are complex organic chemicals which have the
ability to destroy or inhibit the growth of microorganisms such as
bacteria and viruses. Aureomycin is an antibiotic which contains
55.2% C, 26.7% O, 5.85%...

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