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ss7ja [257]
2 years ago
10

How is friction a good thing and a bad thing?

Chemistry
1 answer:
Alenkinab [10]2 years ago
6 0
1. It stops objects from sliding endlessly.
2. It's the reason why we're able to walk

Bad:
1. Decreases efficiency since some energy is wasted and turns to heat
2. Damages equipment/objects like when you slide it on the floor
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When NH3(g) reacts with N2O(g) to form N2(g) and H2O(g), 105 kcal of energy are evolved for each mole of NH3(g) that reacts. Wri
Ganezh [65]

Answer : The balanced chemical equation is,

2NH_3(g)+3N_2O(g)\rightarrow 4N_2(g)+3H_2O(g)+210kcal

Explanation :

Balanced chemical equation : It is defined as the number of atoms of individual elements present on the reactant side must be equal to the number of atoms of individual elements present on product side.

The given unbalanced chemical reaction is,

NH_3(g)+N_2O(g)\rightarrow N_2(g)+H_2O(g)+105kcal

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of individual elements are not balanced.

In order to balanced the chemical reaction, the coefficient 2 is put before the NH_3, the coefficient 3 is put before the N_2O\text{ and }H_2O and the coefficient 4 is put before the N_2.

The energy evolved in this reaction = 105Kcal\times 2=210Kcal

Thus, the balanced chemical reaction will be,

2NH_3(g)+3N_2O(g)\rightarrow 4N_2(g)+3H_2O(g)+210kcal

7 0
3 years ago
Helium has a density of 1.79 x 10-4 g/mL at standard temperature and pressure. A balloon has a volume of 6.3 liters. Calculate t
sukhopar [10]
To find the mass you divide multiply volume and density..

Density = 1.79 x 10^-4     Volume = 6.3

(1.79 x 10^-4 )(6.3) =  <span>1.1 x 10^-3 g
</span>
7 0
3 years ago
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Methane reacts with oxygen to produce carbon dioxide and water,What are the products? A. methane and water. B. oxygen and carbon
EleoNora [17]
D, carbon dioxide and water. Methane and oxygen PRODUCE carbon dioxide and water in their reaction. 
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3 years ago
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Mezoic era began 252m years ago and ended 6.6m years ago.
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3 of the largest mass extinction occurred at this era. One which include the dinosaurs.
I hope this helped. :)
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3 years ago
What is the scientific method describes as nonlinear
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Scientists often repeat one or more steps several times.
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3 years ago
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