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3 years ago

Which the following statement ia correct for the equation shown here

Chemistry

1 answer:

Shkiper50 [21]3 years ago

7 0

B.

As you can see both NO and NH3 have 4 moles therefore it is 4:4 between the molecules or in other words a 1:1 ratio in simplest forms

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A mileage test is conducted for a new car model. Thirty randomly selected cars are driven for a month and the mileage is measure

Leni [432]

Answer: $(27.81,\ 29.39)$

Explanation:

Given : Sample size : n= 30 , it means it is a large sample (n≥ 30), so we use z-test .

Significance level : $\alpha: 1-0.95=0.05$

Critical value: $z_{\alpha/2}=1.96$

Sample mean : $\overline{x}=28.6$

Standard deviation : $\sigma=2.2$

The formula to find the confidence interval is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

i.e. $28.6\pm (1.96)\dfrac{2.2}{\sqrt{30}}$

i.e. $28.6\pm 0.787259889321$

$\approx28.6\pm 0.79=(28.6-0.79,28.6+0.79)=(27.81,\ 29.39)$

Hence, the 95% confidence interval for the mean mpg in the entire population of that car model = $(27.81,\ 29.39)$

4 0

3 years ago

Pls Help me I am stuck on this question.

kolbaska11 [484]

Answer:

compound is the answer

4 0

3 years ago

Molecules can exist as: A)solids B) liquids C) gases D) all of the above

DerKrebs [107]

I believe it is D. Hope this helps you!

6 0

3 years ago

How does Arizona's climate relate to the air and ocean currents?

harkovskaia [24]

Answer: In Arizona, climate change is already making deadly heat waves, droughts and wildfires across the state worse. These impacts have real costs on Arizonans' health and economy, including heat-related deaths, higher electricity bills, crop losses and more.

Explanation:

https://www.edf.org/climate/costofinaction- this is where I gathered this info. Not mine. But I hope it helps!

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3 years ago

What are two systems that use radio waves

Goshia [24]

Mobile radio communication
Broadcasting
Navigation systems

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3 years ago

Which the following statement ia correct for the equation shown here​

Which the following statement ia correct for the equation shown here