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4vir4ik [10]
3 years ago
7

Question 5 of 10

Chemistry
1 answer:
vitfil [10]3 years ago
5 0

Answer:

A

Explanation:

A option is correct .

you cannot create energy neither you can destroy it but you can only convert into other form

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How many electrons are shared in the Lewis structure
Diano4ka-milaya [45]
Hey there,

Answer:

4 valence electrons.

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3 years ago
What is the hydrogen ion concentration of a solution with a pH 5? *
nekit [7.7K]

Answer:

In the same way, a solution with a pH of 5 contains 10-5mol/l of hydrogen ions, a solution with a pH of 6 contains 10-6mol/l of hydrogen ions, while the solution with a pH of 7 contains 10-7mol/l of hydrogen ions.

Explanation:

5 0
3 years ago
The pen on seismograph swings freely.
Sever21 [200]
This statment is false, the pen on a seismograph does not swing freely.
7 0
3 years ago
Convert 55.6 km to m <br> show equation
crimeas [40]

Explanation:

1 km = 1000m

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5 0
3 years ago
Read 2 more answers
What mass of natural gas (CH4) must you burn to emit 264 kJ of heat?
mariarad [96]
The heat released by cpmolete the combustion of organic products with oxygen is called heat of combustion.

Here 1 mol of CH4 realesed 802.3 KJ

To emit 264 kJ you multiply you need (1 mol of CH4/802.3 kJ)* 264 kJ = 0.329 mol of CH4

The molar mass, MM, of CH4 is 12 g/mol + 4*1g/mol = 16 g/mol

The to obtain the mass multiply the number of moles times the molar mass:

mass = n * MM = 0.329mol * 16g/mol = 5.26 grams

Answer: 5.26 grams



7 0
2 years ago
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