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3 years ago

PLEASE HELP!! ASAP!! WILL MARK BRAINLIEST!!!

Chemistry

1 answer:

sdas [7]3 years ago

7 0

Answer:

Alkali metals are soft and have low melting points.

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Given the balanced equation: 2KClO₃ ---> 2KCl + 3O₂ How many moles of O₂ are produced when 4.0 moles of KCl are produced?

Verizon [17]

Answer:

The answer to your question is 6.0 moles of O₂

Explanation:

Data

2KClO₃ ⇒ 2KCl + 3O₂

moles of O₂ = ?

moles of KCl = 4

Process

To find the number of moles of O₂, use proportions and cross multiplication.

Use the coefficients of the balanced equation.

2 moles of KCl ----------------- 3 moles of O₂

4 moles of KCl ----------------- x

x = (4 x 3) / 2

-Simplification

x = 12/2

-Result

x = 6 moles of O₂

-Conclusion

When 4,0 moles of KCl are produced, 6.0 moles of O₂ will be produced.

6 0

2 years ago

Nitrogen dioxide gas is formed by reaction of nitrogen monoxide gas and oxygen gas

NeTakaya

Answer:

For the formation of nitrogen dioxide, the reactants used are nitrogen monoxide and oxygen gas. 2 moles of nitrogen monoxide gas react with 1 mole of oxygen gas to produce 2 moles of nitrogen dioxide gas.

Explanation:

3 0

2 years ago

Radio waves, which travel at the speed of light, are used to communicate with satellites in space. If a message from flight cont

Burka [1]

Answer:

Is this on edgenuity or some type of virtual school Lmk and then i could help !

Explanation:

7 0

3 years ago

Listed below are the amounts of mercury (in parts per million, or ppm) found in tuna sushi sampled at different stores. The s

LenaWriter [7]

Answer:

• The 90% inverval estimate of the mean amount of mercury in the population is [0.420 ppm, 1.252 ppm].

Explanation:

1) Data:

• μ = 0.836 ppm

• σ = 0.253 ppm

• z = ?

• 90% confidence interval estimate of the mean = ?

2) Finding Zo for Pr = 90%

The symmetry of the standard normal distribution implies that, for the 90% confidence interval, 5% of the values (area) are above Zo and 5% are below = - Zo.

Using technology (statistic software) or a table of the standard normal probability, you find that for Pr ≥ 0.05 means Zo ≥ 1.6045.

And, by symmetry, Pr ≤ 0.05 means Zo ≤ -1.6045.

3) Calculate the limits of the interval:

• Formula: z = ( X - μ) / σ

• Upper limit: X = zσ + μ = 1.645 (0.253 ppm) + 0.836 ppm = 1.252 ppm.

• Lower limit: X = zσ + μ = -1.645 (0.253ppm) + 0.836 = 0.420 ppm.

Then, the 90% inverval estimate of the mean amount of mercury in the population is [0.420 ppm, 1.252 ppm] ← answer

3 0

3 years ago

In what way are all sound waves and light waves similar?

SashulF [63]

So sound waves, and light waves. Well they are both waves, they can be reflected/refracted.

5 0

3 years ago

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