On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29% for 69Ga and 39.71% for 71Ga . What is the atomic mass of gallium for this location?The mass of 69Ga is 68.7200amu . The mass of 71Ga is 70.9200amu .

Answers

Answer 1

Answer: To solve this, we multiply the each mass of the isotope by the percentage of abundance of each isotope.

average molecular weight = 0.6129(68.72amu) + 0.3971(70.92) = 70.28 amu

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A researcher is using a particle accelerator in an expriment studying isotopes. How can the researcher change on isotope into a different isotope of the same element?

Which of the following types of radiation can be shielded by piece of paper or fabric

Answers

There are 3 major types of radiation. The Alpha, Beta and Gamma radiation. It is the Alpha radiation that can be stopped by a piece of paper or fabric. Beta on the other hand can be stopped by plastic or a thin sheet of metal and Gamma by a piece of aluminum foil or lead.

Which reaction occurs at the cathode in an electrochemical cell?(1) combustion (2) neutralization (3) oxidation (4) reduction

Answers

The correct answer is option 4. The reaction occurring in the cathode is a reduction reaction. No matter what type of electrochemical cell it is, electrolytic or voltaic, oxidation reaction always happen in the anode while reduction always happens in the cathode.

Is Jesus Christ real??

Answers

I don't understand how this is a chemistry Question but if you ask me I will tell you yes he is and that he died for us so that we can be saved from ourselves

yes i think he is real but it is what you think

3.50 L of 0.200 M hydrochloric acid is prepared using 12.0 M HCl(aq) stock solution to which water is added. What volume of the stock solution
is required?

a. 7.00 mL
b. 8.40 mL
c. 17.1 mL
d. 58.3 mL

Answers

Answer:

Explanation:

To determine the volume of the stock solution required to prepare 3.50 L of 0.200 M hydro chloric acid, we can use the formula:

M1V1 = M2V2

where:

M1 = concentration of the stock solution

V1 = volume of the stock solution

M2 = desired concentration of the diluted solution

V2 = desired volume of the diluted solution

Let's substitute the given values into the formula:

M1 = 12.0 M

V1 = ?

M2 = 0.200 M

V2 = 3.50 L

Now we can solve for V1:

12.0 M x V1 = 0.200 M x 3.50 L

V1 = (0.200 M x 3.50 L) / 12.0 M

V1 = 0.0583 L

To convert the volume from liters to milliliters, we multiply by 1000:

V1 = 0.0583 L x 1000 mL/L

V1 = 58.3 mL

Therefore, the volume of the stock solution required is 58.3 mL.

So, the correct answer is d. 58.3 mL.

To determine the volume of the stock solution required, we can use the formula:

Molarity1 x Volume1 = Molarity2 x Volume2

Where Molarity1 and Volume1 represent the initial concentration and volume, and Molarity2 and Volume2 represent the final concentration and volume.

Given:

Molarity1 = 12.0 M

Volume1 = ?

Molarity2 = 0.200 M

Volume2 = 3.50 L

Plugging in the values into the formula, we have:

12.0 M x Volume1 = 0.200 M x 3.50 L

Simplifying the equation, we can solve for Volume1:

Volume1 = (0.200 M x 3.50 L) / 12.0 M

Volume1 ≈ 0.0583 L

To convert this to milliliters, we multiply by 1000:

Volume1 ≈ 58.3 mL

Therefore, the volume of the stock solution required is approximately 58.3 mL.

The closest answer option is d. 58.3 mL.

I hope this explanation helps! Let me know if you have any further questions.

What is kinetic energy? A. the energy an object has due to its motion B. the energy derived from chemical reactions C. the energy an object has due to its position D. the energy an object releases as heat

Answers

Answer: Option (a) is correct.

Explanation:

When an object moves from its initial position, it acquires some energy. This energy is called kinetic energy, as it is governed by the motion of an object.

The formula to calculate kinetic energy is as follows.

kinetic energy = $\frac {1}{2}mv^(2)$

where,

m = mass of object

v = velocity of object

Thus, it is concluded that kinetic energy is the energy an object has due to its motion.

The energy an object possesses due to its motion.

A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?

Answers

15 protons and 15 electrons, but 17 neutrons.

Having 17 neutrons (not even to the # of protons) would result in a radioactive isotope. An isotope is when the neutrons in the nucleus aren't equivalent to the protons.

The symbol of radionuclide would be : An isotope

Hey there

We know that a radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons.

The answer is isotope. Atoms that have the same number of protons but different numbers of neutrons are called isotopes.

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