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3 years ago

Never heard of this!!

Chemistry

1 answer:

Ksivusya [100]3 years ago

7 0

Answer:

See explanation

Explanation:

a) u= 60 m/s, v= 45 m/s, t = 7 secs

From;

v = u + at

a = v - u/t

a= 45 - 60/7

a = -2.14 m/s^2

u = 200 m/s

v= 235 m/s

t = 30 secs

v = u + at

a = v-u/t

a = 235 - 200/30

a= 1.17 m/s^2

i) Acceleration = 3 - 1/2-0 = 2/2 = 1 m/s^2

ii) The slope between 2 and 5 is zero because velocity was not changing with time.

iii) Within the time between 2 and 5 the speed remained at 3 m/s

iv) the slope between 5 and 8 is 2 - 3/8 - 5 = -1/3 = -0.33m/s^2

v) The negative slope means that velocity is decreasing with time(deceleration).

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Pentanitrogen heptachloride formula

Marianna [84]

Answer:

Explanation:

this is the answer hope it helps!(:

4 0

3 years ago

Use the unbalanced equation NH3+O2=NO+H2O to find the mole ratio between NO and H2O

Leona [35]

Answer:

For every 4 moles of NO created, 6 moles of H2O are created so the ratio is 4:6

Explanation:

You just need to balance the equation.

NH3 + O2 -> NO + H2O

1. I started with hydrogen; there's 3 on the left and 2 on the right. Multiply them together to find a number they both go into (3×2=6, but in this case 6 hydrogen on each side does not work so I doubled it so there is 12 hydrogen on each side).

This will bring you to this:

4NH3 + O2 -> NO + 6H2O

2. Now get equal amounts of nitrogen on each side. There's 4 nitrogen on the left side, and 1 on the right. Multiply the right by 4. Then you will have this:

4NH3 + O2 -> 4NO + 6H2O

3. Last thing you need to do is have the same amount of oxygen on both sides. On the left you have 2 and on the right you have 10. Get the left to 10 by multiplying it by 5.

Balanced: 4NH3 + 5O2 -> 4NO + 6H2O

In word form, for every reaction between 4 moles of ammonia and 5 moles of oxygen, 4 moles of nitric oxide and 6 moles of water will be created.

I hope this helps!

5 0

3 years ago

When the temperature of the air is 25°C, the velocity of a sound wave traveling through the air is approximately

Vitek1552 [10]

Answer ; The correct answer is : 346 m/s .

Sound is a type of longitudinal wave , which is produced when a matter compress or refracts .

Speed of sounds depends on factors like medium , density , temperature etc .

Effect of Temperature on speed of sounds :

When the temperature increases , molecules gains energy and they starts vibrating and with higher temperature vibration becomes fast . So the waves of sounds can travel faster due to faster vibrations . Hence , speed of sounds is directly proportional to the temperature or speed of sounds increases with increase in temperature .

The speed of sounds at 0⁰C is 331 $\frac{m}{s}$