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3 years ago

2. Using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest

Chemistry

1 answer:

Savatey [412]3 years ago

4 0

Answer: 24.309amu

Explanation:

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What were the success and failures that came to Boyle’s excitements?

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To always try and never give up

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4 years ago

The air pressure for a certain tire is 109 kPa. What is this pressure in atmospheres?

Len [333]

1.08 atm is the pressure for a certain tire in atmosphere.

<u>Explanation:</u>

One kilo pascal (1 kPa) corresponds to 1000 pascal. Another common unit used for pressure is atmosphere (symbolised as ‘atm’). 1 atm refers the standard atmospheric pressures and corresponds to 760 mm Hg and 101.3 kPa. Atmospheric pressures are commonly referred as square inches (psi)/ pounds.

$1 \mathrm{atm}=101.3 \mathrm{kPa}=101,325 \mathrm{Pa}=760 \mathrm{mm} \mathrm{Hg}=760 \text { torr }=14.7 \mathrm{lb} / \mathrm{in}^{2}(\mathrm{psi})$

Given:

The air pressure for a certain tire = 109 kPa

We need to find pressure in atmospheres

So, we know,

1 atm = 101.3 kPa

Hence,

$\frac{109 \mathrm{kPa}}{1} \times \frac{1 \mathrm{atm}}{101.3 \mathrm{kPa}}=1.076=1.08 \mathrm{atm}$

1.08 atm is the pressure for a certain tire in atmosphere.

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4 years ago

g Multidrug resistance can make it difficult to treat cancer successfully with chemotherapy. What causes multidrug resistance in

alexandr1967 [171]

Answer:

Chemotherapy drugs and other toxins are actively pumped out of cancer cells by transmembrane proteins.

Explanation:

Drugs inside the cell can be inactivated by oxidation and / or conjugation with glutathione, such as glutathione S-transferases, playing an important role in detoxification. However, conjugation is not enough for drug elimination. And this is where the GS-X pumps appear. Transporter proteins, such as Mrp protein, act as GS-X pumps. The PgP, Mrp and Bcrp proteins function as expulsion pumps, thus reducing the intracellular accumulation of drugs, causing resistance in cancer cells.

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3 years ago

6. You have a sample of H2Ois, with a mass 23.0 grams at a temperature of 46.0

anygoal [31]

Answer: I think it would be -23

Explanation:

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3 years ago

How long is a hard boiled egg good for in the refrigerator?.

dedylja [7]

Answer:

Hard-boiled eggs can be preserved up to 7 days in the refrigerator.

Explanation:

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2 years ago