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Fantom [35]
3 years ago
5

What is the total number of moles of hydrogen gas contained in 9.03 x 10^23 molecules

Chemistry
2 answers:
Mrac [35]3 years ago
5 0
Answer is 1.2 x 1024 atoms. Explanation: Divide 9.03 x 1023 by 6.02 x 1023 to find the number of moles of hydrogen gas. 9.02 / 6.02 = 1.5 moles (remember the numerator and denominator each contain 10 to the 23, so this cancels out. 1 mole equals 6.02 x 1023 molecules).
Lilit [14]3 years ago
3 0

Answer:

The answer is 1,5 moles of H2

Explanation:

Let's start from the definition of the Avogadro's number. The Avogadro's number is 6,02 x 10^{23} and means that, for any compound, we have 6,02 x 10^{23} molecules for each mol. So, in that way, we can write the following expression:

9,03*10^{23} molecules H2* \frac{1 mol H2}{6,02 * 10^{23} molecules H2}

The result is: 1,5 moles of H2

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How many grams of sodium acetate are in solution in the third beaker?
Kipish [7]

Answer:

46g of sodium acetate.

Explanation:

The data is: <em>Precipitation from a supersaturated sodium acetate solution. The solution on the left was formed by dissolving 156g of the salt in 100 mL of water at 100°C and then slowly cooling it to 20°C. Because the solubility of sodium acetate in water at 20°C is 46g per 100mL of water, the solution is supersaturated. Addition of a sodium acetate crystal causes the excess solute to crystallize from solution.</em>

The third solution is the result of the equilibrium in the solution at 20°C. As the maximum quantity that water can dissolve of sodium acetate at this temperature is 46g per 100mL and the solution has 100mL <em>there are 46g of sodium acetate in solution. </em>The other sodium acetate precipitate because of decreasing of temperature.

I hope it helps!

6 0
3 years ago
Cole is working with radioactive particles and has set up a shield made of aluminum for protection. Which of the following will
koban [17]

Answer:

C.) Alpha, beta, and gamma particles

Explanation:

A dense shield of aluminium can protect Cole from all the listed types of radiation produced from the radioactive particles.

A radioactive protector has very unique and specie ability to contain and prevent the movement of radiations of any types from going into the body.

The strongest and most penetrating radiations are the gamma rays. Any material that can prevent the movement of these rays can halt alpha and beta particles too.

An aluminium shield is made up of multiple layers of aluminium stacked together and it provides enough resistance.

6 0
3 years ago
Read 2 more answers
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gulaghasi [49]

Answer:

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3 0
3 years ago
Can someone please help, 20 points <br> Draw 3-ethyl-2,4-dimethyl octanoic acid
Brilliant_brown [7]

3-ethyl-2.4-dimethyl-octanoic acid

6 0
3 years ago
Forces between similar molecules are said to be
podryga [215]

Answer:

Forces between similar molecules are said to be <em>cohesive</em> while those between different types of molecules are said to be <em>adhesive</em>.

Water 'beads' due to its strong <em>cohesive</em> forces. The meniscus of water in a glass tube is <em>concave</em> because the <em>adhesive</em> forces are strong.

Explanation:

The water in a tube has stronger adhesive forces between the water and glass molecules, so the cohesive forces between water molecules are weaker. That makes the water 'ascend' through the tube, giving a concave form of the meniscus. Another example is mercury, which is the opposite. In this case, the cohesive forces are stronger than the adhesive ones, thus the meniscus is convex.

4 0
3 years ago
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