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AnnyKZ [126]
3 years ago
14

7. If the atomic number of an element is 6 and its mass number is 14, how many

Chemistry
1 answer:
Jet001 [13]3 years ago
3 0

Answer:

14-6

8

so 8 is the answer because atomic number is number of protons and atomic mass is sum of protons and neutrons so to find the number of neutrons we will subtract proton number with the atomic mass.

Thanks

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2C_H. + 702 — 400, + 6H2O
astra-53 [7]

Balanced Eqn

2

C

2

H

6

+

7

O

2

=

4

C

O

2

+

6

H

2

O

By the Balanced eqn

60g ethane requires 7x32= 224g oxygen

here ethane is in excess.oxygen will be fully consumed

hence

300g oxygen will consume  

60

⋅

300

224

=

80.36

g

ethane

leaving (270-80.36)= 189.64 g ethane.

By the Balanced eqn

60g ethane produces 4x44 g CO2

hence amount of CO2 produced =

4

⋅

44

⋅

80.36

60

=

235.72

g

and its no. of moles will be  

235.72

44

=5.36 where 44 is the molar mass of Carbon dioxide

hope this helps

6 0
3 years ago
Why are space probes and other unmanned crafts more commonly used for space investigations than space crafts with crews of astro
Crank
All of these are correct.
4 0
3 years ago
What type of bond does sodium and bromine form?
vitfil [10]
Sodium is a metal and bromine is a nonmetal so they form an ionic compound
nonmetals and nonmetals form covalent compounds
7 0
3 years ago
Complete the paragraph below. Do it using your Science journal or notebook
svetlana [45]

Answer:

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3 0
3 years ago
. The dissolving process is exothermic when the energy
Serhud [2]

Answer:

A

Explanation:

The dissolving process depends on the interaction between solute and solvent (solvation) and the breaking up of the intermolecular bond between solutes. The former is exothermic in nature, while the later is endothermic. Energy is released when solute-solvent particles interact. When this energy exceeds the energy required to break intermolecular bonds between the solute particles, dissolution is exothermic.

8 0
3 years ago
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