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zhenek [66]
3 years ago
6

I dont know what it is

Chemistry
2 answers:
Lisa [10]3 years ago
8 0
Carbon
Hydrogen
Oxygen
Nitrogen 
Sulfur
Sodium
Phosphorus
Iron
Calcium
marysya [2.9K]3 years ago
5 0
Carbon
calcuim
iron
hydrogen
iodine
nitrogen
oxygen
phosphorus
sulfur
The letters are the symbols for those elements
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Which description accurately represents a water molecule? (1 point)
bagirrra123 [75]

The description which accurately represents a water molecule is slightly negative oxygen pole, slightly positive hydrogen poles.

Water is a polar molecule. This means that the molecule has a dipole moment.

The polarity of water arises from the difference in electronegativity between hydrogen and oxygen.

Hence, in water molecule, oxygen is slightly negative and hydrogen is slightly positive thereby resulting in a dipole.

Learn more: brainly.com/question/10904296

7 0
3 years ago
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Which of the following is the best example of potential energy?
AveGali [126]

Answer:

A car stopped at the top of a hill

Explanation:

Potential energy is the energy that is stored in an object due to its position relative to some zero position.

therefore, the answer is the first option

=> A car stopped at the top of a hill

hope this helps and is right :)

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3 years ago
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Convert the following to moles 34.0g NH3
Reika [66]
First we must find the relative formula mass of NH3:
14+(1x3) = 17
Now we use the formula moles(n)= mass(g)/Mr
From substitution we get 34.0/17 = 2

The answer is 2M (M for Moles)
6 0
4 years ago
Need help please With this.
Brums [2.3K]

Answer:question 3:(W)

question 4:(c)

Source:trust me bro

6 0
3 years ago
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"The combustion of ethylene proceeds by the reaction C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) When the rate of disappearance of O2 i
Julli [10]

Answer:

The rate of  disappearance of C_2H_4 is 0.0766 M/s.

Explanation:

C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(g)

Rate of the reaction = R

R=-\frac{1}{1}\frac{d[C_2H_4]}{dt}=-\frac{1}{3}\frac{d[O_2]}{dt}

[te]R=\frac{1}{2}\frac{d[CO_2]}{dt}=\frac{1}{2}\frac{d[H_2O]}{dt}[/tex]

Rate of disappearance of O_2 =0.23 M/s

Rate of disappearance of O_2=3\times R

0.23 M/s=3\times R

R =0.07666 M/s

Rate of disappearance of C_2H_4=1\times R

\frac{d[C_2H_4]}{dt}=1\times 0.23 m/s=0.0766 M/s

The rate of  disappearance of C_2H_4 is 0.0766 M/s.

7 0
4 years ago
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