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Lana71 [14]
3 years ago
8

If the check after the substitution of the answer doesn't work, does that mean that the result is incorrect for equation with va

riables on both sides
Mathematics
1 answer:
Alecsey [184]3 years ago
8 0
I don't understand what your point is. Mind posting a picture or something?
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How much heat in kJ is released when nitrogen and hydrogen react as below to form 100.g ammonia heat equals-92.2kj
tresset_1 [31]

100g of ammonia releases 271.18 kJ of heat.

<u>Explanation:</u>

Given:

N₂ reacts with H₂

The reaction is:

2N₂ + 3H₂ → 2NH₃ + 92.2 kJ

According to the balanced reaction:

2 X 17g of ammonia releases 92.2 kJ of heat

34g of ammonia releases 92.2 kJ of heat

100g of ammonia will release = \frac{92.2}{34} X 100 kJ of heat

                                                 = 271.18 kJ

Therefore, 100g of ammonia releases 271.18 kJ of heat.

8 0
3 years ago
Using the image, find the distance between the points given on the graph.
Yuliya22 [10]

Answer:

3 units

Step-by-step explanation:

using the distance formula

6 0
3 years ago
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Add the integers.<br> -6 + (-4) =( ?<br> B-2<br> C 2<br> D 10
lina2011 [118]
Answer:
-6 + -4 = -10
3 0
3 years ago
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twice the sum of a number and 2 is equal to three times the difference of the number and 3. Find the number
Lana71 [14]
2(x+2)=3(x-3)
2x+4=3x-9
2x=3x-13
-x=-13
x=13

The number is 13
3 0
3 years ago
She works as a waitress at a local Emerald Monday restaurant. Her regular hourly wage is $15.50. She regularly works 40 hours pe
lina2011 [118]

Answer:

Her regular weekly pay is $62 and her annual salary is $3100.

Step-by-step explanation:

Given that her hourly wage=$15.50 / hour

As she works 40 hours per week, so her weekly pay = 15.50 x 40 = $62/ week.

If she works 50 weeks each year, so her yearly pay = 62x50=$3100 /year.

Hence, her regular weekly pay is $62 and her annual salary is $3100.

8 0
3 years ago
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