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4 years ago

Why don’t vegetable oil and water mix?

Chemistry

1 answer:

alexdok [17]4 years ago

5 0

Answer:

Because oil is less dense than water, it will always float on top of water, creating a surface layer of oil.

Explanation:

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A substance made up of only one type of atom would be a

mezya [45]

Answer:

Element

Explanation:

Because elements can be made with only one atom the rest of the answers cant be

4 0

3 years ago

A 0.4272 g sample of an element contains 2.241 x 10 ^21 atoms . what is the symbol of the element?

grin007 [14]

Answer:

Likely $\rm In$ (indium.)

Explanation:

Number of atoms: $N = 2.241 \times 10^{21}$ .

Dividing, $N$ , the number of atoms by the Avogadro constant, $N_A \approx 6.023 \times 10^{23} \; \rm mol^{-1}$ , would give the number of moles of atoms in this sample:

$\begin{aligned} n &= \frac{N}{N_{A}} \\ &\approx \frac{2.241 \times 10^{21}}{6.023 \times 10^{23}\; \rm mol^{-1}} \approx 3.72 \times 10^{-3}\; \rm mol \end{aligned}$ .

The mass of that many atom is $m = 0.4272\; \rm g$ . Estimate the average mass of one mole of atoms in this sample:

$\begin{aligned}M &= \frac{m}{n} \\ &\approx \frac{0.4272\; \rm g}{3.72 \times 10^{-3}\; \rm mol} \approx 114.82\; \rm g \cdot mol^{-1}\end{aligned}$ .

The average mass of one mole of atoms of an element ( $114.82\; \rm g \cdot mol^{-1}$ in this example) is numerically equal to the average atomic mass of that element. Refer to a modern periodic table and look for the element with average atomic mass $114.82$ . Indium, $\rm In$ , is the closest match.

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3 years ago

Claims • Evidence • Reasoning Make a claim about along which type of tectonic plate boundary this fault would be common. Provide

kiruha [24]

I believe thats a divergent boundary, it occurs when two tectonic plates move away from each other. also causing earthquakes from the two moving against each other?

3 0

2 years ago

A 57.9 g sample of glass is cooled by 27.0°C. How much heat does it release?

liberstina [14]

Explanation:

A 57.9 g sample of glass is cooled by 2.70'C how much heat does it release

1560

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3 years ago

When you have asthma will there be fewer oxygen molecules in your body then normal?

Alex17521 [72]

Answer:

How Asthma Affects Your Body. Asthma is a disease that affects the airways of your lungs. With asthma, your airways' lining tends to always be in a hypersensitive state characterized by redness and swelling (inflammation). It's similar to how your skin becomes red, irritated and sensitive after a sunburn.

Explanation:

3 0

3 years ago