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Alisiya [41]
3 years ago
13

Question 1: Which of the following is an example of an exothermic chemical reaction?

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

Answer:

the answer is D

Explanation:

the reason how ik this is that i already did this test so yea

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If we react 30 grams of ethane (C2H6 ) with 320 grams of oxygen, how many grams of carbon dioxide would we make
V125BC [204]

The mass of carbon dioxide that would be made by reacting 30 grams C2H6 with 320 grams O2 will be 80 grams

From the balanced equation of the reaction:

2C_2H_6+7O_2---4CO_2+6H_2O

The mole ratio of C2H6 to O2 is 2:7.

  • Mole of 30 grams C2H6 = mass/molar mass

                                        = 30/30

                                       = 1 mole

  • Mole of 320 grams O2 = 320/32

                                       = 10 moles

Thus, C2H6 is the limiting reactant.

Mole ratio of C2H6 to CO2 according to the equation = 1:2

Since the mole of C2H6 is 1, the equivalent mole of CO2 would, therefore, be 2.

Mass of 2 moles CO2 = mole x molar mass

                                    = 2 x 44

                                      = 88 grams

More on stoichiometric calculations can be found here: brainly.com/question/8062886?referrer=searchResults

6 0
3 years ago
Which of the following is NOT how compounds are formed?
cricket20 [7]
Compounds are not formed by accepting electrons. Number 1 and 3 are correct.
5 0
3 years ago
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answer answer answer answer answer answer answer answer answer answer answer answer answer answer answer answer answer answer an
ollegr [7]

Answer:

I believe it would be c

Explanation:

the cold an or warm air has no effect the plant must be on it original source

7 0
3 years ago
Read 2 more answers
PLS HELP ME WILL MARK YOU AS BRAINLIEST
kap26 [50]

Answer:  

D

Explanation:

7 0
3 years ago
Which use of iron is due to its chemical properties?
tangare [24]

Answer:

A is the correct answer

Explanation:

if I'm wrong I'm very sorry

5 0
3 years ago
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