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Sunny_sXe [5.5K]
3 years ago
11

a mole of carbon dioxide (co2) has 12.0 grams of carbon (c) and 32.0 grams of oxygen (o). what is the percent composition of car

bon in carbon dioxide?
Chemistry
1 answer:
Pachacha [2.7K]3 years ago
7 0
The moles of the elements need to calculated first
C  = 12 / 12 = 1
02 = 32 / 16 = 2
then...
%composition of carbon = 100 x (1/2)
% composition of carbon = 50%
hope that helps<span />
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An isotope of hydrogen commonly referred to as heavy water is​
muminat

Answer:

Heavy water is a compound that is made up of oxygen and deuterium, a heavier isotope of hydrogen which is denoted by ‘ 2 H’ or ‘D’. Heavy water is also called deuterium oxide and is denoted by the chemical formula D 2 O.

Density: 1.107 g/mL

Dipole moment: 1.87 D

Heavy Water (Deuterium Oxide): D2O

Molecular Mass: 20.02 grams/mole

Explanation:

5 0
3 years ago
Which of the following ions would represent the ion of an element from Group 2A?
Margaret [11]
The best and most correct answer among the choices provided by the question is the fourth choice or letter D.
 <span>A2+ would represent the ion of an element from Group 2A</span>

I hope my answers has come to your help. God bless and have a nice day ahead!
8 0
4 years ago
Read 2 more answers
In the periodic table below, shade all the elements for which the neutral atom has a valence electron configuration of ns2np3 ,
Lorico [155]
Answer is: chemical elements<span> in </span>group 15<span> of the </span>periodic table have <span>neutral atom with a valence electron configuration of ns</span>²<span>np</span>³<span>.
</span>Nitrogen: [He] 2s² 2p³.
Phosphorus: [Ne] 3s² 3p³.
Arsenic: <span>[Ar] 3d</span>¹⁰ 4s² 4p³.
Bismuth: <span>[Xe] 4f</span>¹⁴ 5d¹⁰ 6s² 6p³.
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5 0
4 years ago
For scientific notation, when i move the decimal to the left the the exponent get bigger or smaller?
xeze [42]
I'm not sure what you mean. Besides, I feel like you're talking math.
But anyways, if you have 120 let's say
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if you have 125000
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The number of times you go left the decimal, I guess exponent increases
So yea
3 0
3 years ago
Which correctly lists the following in order of increasing entropy? i. 1 mol of HCl (g) at 50 ° C ii. 1 mol of NaCl (s) at 25 °
MaRussiya [10]

Answer:

ii. < iv. < i. < iii.

Explanation:

Hello,

At first, the entropy is lower in solid-phase systems since their particles are molecularly closer. Next, by knowing that the higher the temperature, the higher the entropy, the gaseous HCl at 25 ºC occupies the second place. After that, it is clear 2 moles of HCl have more entropy than just 1 since the larger the amount of mater the higher the entropy.

Best regards.

7 0
3 years ago
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