Questions LLC
Login
or
Sign Up
Ask a New Question
Chemical Composition
Page 3
Questions (196)
How many oxygen atoms are in the compound below:
Cu3(PO4)2 a 2 b 4 c 6 d 8
1 answer
asked by
jax
82 views
What is a formula that gives information about proportion of atoms in a molecule?
1 answer
asked anonymously
20 views
Which is least affected by chemical weathering
A chair made of plastic A bridge made of iron rods A statue made of marble A pile
1 answer
asked by
Stephen
43 views
An unknown organic compound is 40.00% C, 6.67% H and 53.33% O by mass. The formula weight of the unknown is 90.0g/mole. Find the
3 answers
asked by
Chelsea
1,425 views
Monosodium glutamate (MSG), a food-flavor enhancer, has been blamed for “Chinese Restaurant Syndrome,” the symptoms of which
4 answers
asked by
Sara
1,371 views
The mass % of H in methane (CH4) is ?
How would i solve this?
2 answers
asked by
Amy~
1,258 views
A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be what?
2 answers
asked by
Kortney
1,232 views
What is the mass percent of nitrogen in ammonium carbonate, (NH4)2CO3?
2 answers
asked by
leona
1,095 views
Imagine there is a tank of unknown gas that contains 53.31% carbon, 35.51% oxygen, and 11.18% hydrogen by mass. At 35.0 °C and
4 answers
asked by
A
1,095 views
Mothballs are composed of a chemical called naphthalene which has a formula of C10H8
a) what is the mass of a single naphthalene
2 answers
asked by
Kiana
1,082 views
sometimes,instead of percentage composition, you will have the composition of a mass sample. using the actual mass of the
2 answers
asked by
tula
994 views
A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is
3 answers
asked by
Anonymous
997 views
jewelry marked 14 karat gold is 14/24 pure gold. what is the percent
4 answers
asked by
Joseph
963 views
Sodium hydrogen carbonate NaHCO3, also called baking soda, is an active ingredient in some antacids used for the relief of
1 answer
asked by
duane
966 views
Chalk contains calcium,carbon and oxygen in the ratio 10:3:12.Find the percentage of carbon in a chalk and in a stick of chalk,
3 answers
asked by
Ashish
937 views
whats the chemical composition of steam?!?
2 answers
asked by
MARGARiTA
889 views
What is the approximate depth integrated particulate DMSP quantity (in micromolar m-2) to 30 m? The DMSP at 30 m is
3 answers
asked by
Lizzy
892 views
A compound is 54.52% C, 9.15% H, and 36.32% O by mass. What is the empirical formula?
The molecular mass of the compound is 132
2 answers
asked by
Jerry
886 views
What it the percentage of sulfur in copper(I) sulfide, Cu2S
2 answers
asked by
Tierney
874 views
How do I find how many grams of CH3COOH are present in cm^3 of vinegar? Also, how many moles of CH3COOH are present in 2.5 cm^3
2 answers
asked by
Steven
879 views
Gunpowder contains 75%nitre and10% sulphur.find the amount of gunpowder which carries 9 kg nitre . what amount of gunpowder
5 answers
asked by
alan
838 views
A compound contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has density of
1 answer
asked by
K
863 views
'Imagine there is a tank of unknown gas that contains 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. At 35.0 °C and
1 answer
asked by
samuel
859 views
1.A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molecular mass of 110 g/mol. Determine the
3 answers
asked by
Timmy
1,789 views
NaCL is composed of 39.3% Na and 0.7%. Calculate the mass of Na in 0.375gm salt.
1 answer
asked by
Twynna Andrews
759 views
Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2)
4 answers
asked by
Anonymous
790 views
I have a chemical composition of As2O3. How do I calculate the mass of oxygen that combines with 1 mol of arsenic to form the
1 answer
asked by
bex
768 views
Compare the chemical composition of methane and ethanol to carbon dioxide. Which one can be said to be the complete oxidation of
2 answers
asked by
sandy
744 views
How many grams of oxygen are there exactly in 100.0 g of carbon dioxide?
2 answers
asked by
Tony
722 views
Is H2O an element, compound, or mixture?
1 answer
asked by
b
13 views
Is NaCl an element, compound, or mixture?
1 answer
asked by
b
28 views
Is NaCl + H2O an element, compound, or mixture?
1 answer
asked by
b
15 views
Chemical analysis of a gaseous compound shows its composition to be 36.4% carbon, 57.5% fluorine, and 6.1% hydrogen. A sample of
1 answer
asked by
Jeaninne
704 views
Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of nitrogen and 2.00 g of hydrogen. if a sample of ammonia
2 answers
asked by
Kelsey Walenciak
660 views
Explain how the formulas for H2O and NaCl provide different information about the composition of these two compounds.
What I
2 answers
asked by
Anonymous
655 views
Baking soda consists mostly of a single chemical. Look up what it is, its molecular weight and density, and determine the number
3 answers
asked by
Diana Merritt
610 views
you are given samples of two pure compounds, one of which is a gas and one of which is a liquid at room temperature. by
2 answers
asked by
Lucy J.
621 views
What is the empirical formula of the compound with a mass percent composition of 70.0% Fe and 30.0% O? (Type your answer using
3 answers
asked by
sarah
572 views
I don't understand how to answer this questions. I thought molecular weight was adding up the atomic weight of each element in a
2 answers
asked by
Holly Y.
575 views
The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below:
2 1/4 cups all-purpose
2 answers
asked by
Dora
595 views
Fingernail polish is mainly acetone (C3H6O) and has a density of 0.788gcc.
A. HOW MANY GRAMS OF ACETONE ARE IN A O.5L BOTTLE B
2 answers
asked by
Leslie
571 views
Determine the percentage composition of each of the following compounds
a) NaCl b) AgNO3 c) Mg(OH)2 for NaCl i got na=23/135=0.17
2 answers
asked by
john
579 views
how do i calculate %of arsenic and oygen by mass and chem composition of the oxide
that has been formed 0.702 sample of
1 answer
asked by
mickey
590 views
Calculate the mass percent composition of carbon in the following carbon compound.
C_8H_13O_5N I got 0.4729 as an answer but it's
3 answers
asked by
Mely
566 views
A 2.85 g sample of an unknown chlorofluorocarbon is decomposed and produces 558 mL of chlorine gas at a pressure of 756 mmHg and
2 answers
asked by
cj
573 views
If the arsenic is 76% and oxygen is 24% how would I calculate the chemical composition of of the oc=xide of arsenic that has
1 answer
asked by
bex
552 views
What is the percent composition of each element in ammonium nitrate?
2 answers
asked by
Angel
527 views
How is percent composition calculated?
A. Dividing the mass of each element in the compound by the total mass of the compound and
2 answers
asked by
shana
543 views
I'm confused on how to do these. Please show and explain how to do these. Test/quiz may be tomorrow. Pop Quiz!!!
How do you
3 answers
asked by
Amanda
523 views
What is the difference between compounds, mixtures, and elemennts? Better off what do all of them mean? DO you know what type of
2 answers
asked by
Mary
503 views
Pages
1
2
3
4
Parent Categories (16)
Atomic Structure
Chemical Compounds
Chemical Reactions
Chemistry
Earth Layers
Earth Science/Atmosphere
Earth's Layers
elements and compounds
Human Anatomy
Ingredients
Layers of the Earth
Marine Biology
Materials
Oceanography
Organic Chemistry
Water chemistry