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Chemical Composition
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Questions (196)
Determine the percent composition of sodium hydrogen carbonate.
Na H C O3 1*22.999 1*1.008 1*12.011 3*15.999 22.999 1.008 12.011
1 answer
asked by
duane
534 views
According to the principle of electrical neutrality, a water sample must have the same number of anions and cations. Assuming
2 answers
asked by
Caleb
514 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)
2 answers
asked by
Anonymous
539 views
If the percentage of arsenic is 76% and the percentage of oxygen is 24% how do I calculate the chemical composition of the oxide
1 answer
asked by
Laura
520 views
What is the ratio of carbon atoms to hydrogen atoms in the compound 2CH2 = C2H4?
A. 1 to 9 B. 9 to 1 C. 3 to 6 F. 6 to 3
3 answers
asked by
Peter
512 views
Which of Earth's layers has the same chemical composition as the mesosphere?(1 point)
Responses inner core inner core lithosphere
1 answer
asked by
taylor swift
67 views
In a 100g sample of water, determine the amount of weight that
is attributed to Hydrogen and to Oxygen. i found the mass ratio
2 answers
asked by
lisa
507 views
How do I find the percent composition of
H2O: 20.14grams C2O4: 51.64grams Fe 3+: 11.34grams K^+: 15.06 grams and the empirical
4 answers
asked by
LT
496 views
Determine the amount of potassium chloride in each of the following solutions: 21.7g of a solution containing 1.10% KCl by mass.
1 answer
asked by
Kelsey G
487 views
How many grams of oxygen are there in 100.0 grams of water? What percentage of the mass of water is oxygen?
2 answers
asked by
Jack
472 views
Calculate the number of H Atoms present in 0.125 g CH3OH
2 answers
asked by
Alisa
476 views
Which cannot be broken down chemically or physically into a simpler substance between sugar, salt, seawater, and copper?
2 answers
asked by
Jenny
479 views
two-thirds of the atoms that make up H2S are hydrogen. What percentage of the weight of hydrogen sulfide is the weight of the
2 answers
asked by
Anonymous
465 views
A sample of seawater contains 0.000245 g of sodium chlorate per mL of solution How much sodium chloride is contained in 50.0 mL
2 answers
asked by
Anonymous
468 views
calculate the percentage composition of water in Na3PO4 * 7 H2O
1 answer
asked by
yen
470 views
need five differences between compounds and molecules......
got only one that is ;A molecule is formed when two or more atoms
1 answer
asked by
leena
473 views
Trichloromethane consists of10.05% carbon 0.83% hydrogen and 82.12% chlorine.Its relative molar mass is 119.5% .Find its
3 answers
asked by
Morgane
441 views
express this mass as a percentage of the weight of your sample of plant food. this is the % of elemental phosphorous in the
4 answers
asked by
Buzz
448 views
Household bleach is 5.25% NaOCl. What mass of NaOCl would be found in a .5 kg sample of bleach?
1 answer
asked by
Mary
451 views
The compound X4C3 contains 15.03% carbon. What is the chemical symbol for X ?
1 answer
asked by
joan
435 views
1. The percent composition by mass for peroxyacylnitrate (PAN) is:19.8% C,2.5% N, and the rest is oxygen. Determine the
1 answer
asked by
irfan
435 views
Which of earths layers has the same chemical composition as the mesosphere
A. Asthenosphere. B. Inner core. C. Lithosphere D.
1 answer
asked anonymously
59 views
The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and
53.4% O and its molecular mass was determined by
1 answer
asked anonymously
43 views
Is blood a compound or mixture?
1 answer
asked anonymously
18 views
describe the following
compound and mixture
1 answer
asked anonymously
39 views
Sugar is made of carbon, hydrogen, and oxygen atoms. Which statement below best describes sugar?(1 point)
Responses An element
1 answer
asked by
not.bta.eli
99 views
What is the percent composition of H in C6H12O6 ?
Responses 40% 40% 53% 53% 7% 7% 12%
1 answer
asked anonymously
15 views
What is the percent composition of O in C6H12O6 ?
Responses 53% 53% 40% 40% 16% 16% 7%
1 answer
asked anonymously
15 views
What is the percent composition of H in H2O
1 answer
asked anonymously
11 views
Sugar is made of carbon, hydrogen, and oxygen atoms. Which statement below best describes sugar?(1 point)
Responses An element
1 answer
asked by
ANSWER CORRECTLY
24 views
22.57% sulfur, 45.06% oxygen and the remaining element as sodium. What is the total number of moles of sodium that is present in
1 answer
asked anonymously
11 views
Find the percentage composition of sodium phosphate
1 answer
asked anonymously
16 views
Calculate the molecular weight, wt.% element in a crust and wt.% oxide in a crust for the given information below.
SiO2
1 answer
asked anonymously
12 views
Table 1. Percent Composition Data of the Explosive Material
% C % H % N % O Location Empirical Formula Compound Identity 24.25
1 answer
asked anonymously
7 views
Passenger
% C % H % N % O Location Empirical Formula Compound Identity 1 80.46 10.15 9.39 -- Blood
1 answer
asked anonymously
5 views
% C
% H % N % O Location Empirical Formula Compound Identity 80.46 10.15 9.39 -- Blood C8H12N2O3 caffeine 81.80 6.11 -- 12.09
1 answer
asked anonymously
10 views
find only 8 using this info
Table 2. Percent Composition Data of the Compounds Found in or with the Passenger’s Bodies
1 answer
asked anonymously
9 views
identify all 8 passengers
Table 2. Percent Composition Data of the Compounds Found in or with the Passenger’s Bodies Passenger
1 answer
asked anonymously
7 views
A compound found in crude oil consists of 93.71% C and 6.29% H by mass. The molar mass of the compound is 128 g/mol. What is its
1 answer
asked anonymously
16 views
What information is required to determine the percent composition of a compound?
1 answer
asked anonymously
8 views
Find the percentage composition of calcium in the following compound, round to the nearest hundredth of a percent.
1 answer
asked anonymously
6 views
Review the graphic and select the best response based on that data.
a Elements making up the human body are worth about $600. b
1 answer
asked anonymously
7 views
What formula do you use define percent composition of mass
1 answer
asked by
Alicia
8 views
Water is made up of ________.
1 answer
asked anonymously
4 views
answer each
QUESTION 1 How does the scanner show that different materials have different chemical compositions? ¼ QUESTION 2
1 answer
asked by
meep
1 view
How does the scanner show that different materials have different chemical compositions?
1 answer
asked by
hekur
1 view
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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