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2 years ago

A car traveling at 30 m/s comes to a stop in 5 seconds. What is the acceleration of this car?

Chemistry

2 answers:

aliina [53]2 years ago

5 0

Answer:

6m/s brainliest?

Explanation:

Bess [88]2 years ago

4 0

Answer:

6 m/s

Explanation:

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Which of the following is an irreversible physical change?

Yuliya22 [10]

Answer:

b) sharpening a pencil

Explanation:

If you melt lead, boil water, or dissolve sugar in water, you can return all of them back to their original state. If you sharpen a pencil, you can't reattach the shavings as they were originally.

3 0

3 years ago

How do scientists do background research on topics they have question about

Aliun [14]

They use information from other things that relate to that topic and then use that to do their research

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3 years ago

Determine how many gmol, kmol, and lbmols there are in 50 kilograms of n-hexane.

Artist 52 [7]

Answer: 581 gmol

0.581 kmol

$1.28\times 10^{-3}lbmol$

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{50\times 1000g}{86g/mol}=581mol$

1. The conversion for mol to gmol

1 mol = 1 gmol

581 mol= $\frac{1}{1}\times 581=581gmol$

2. The conversion for mol to kmol

1 mol = 0.001 kmol

581 mol= $\frac{0.001}{1}\times 581=0.581kmol$

3. The conversion for mol to lbmol

1 mol = $2.2\times 10^{-3}lbmol$

581 mol= $\frac{2.2\times 10^{-3}}{1}\times 581=1.28\times 10^{-3}lbmol$

3 0

3 years ago

Why the size of Na+ is smaller then Na <br><br>

Rufina [12.5K]

Because Na+ has less electrons than Na which means Na+ will be a smaller atom (give me brainliest please)

5 0

3 years ago

I’m screwed omg i totally forgot I have school today and forgot to do this someone help me rq I’ll brainlist plslsls be awake ju

zlopas [31]

Answer:

Zn + O2 = ZnO

Mg + O2 = MgO

Cu + O2 = CuO

Al + O2 = Al2O3

Explanation:

7 0

2 years ago