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Liula [17]
3 years ago
13

Many radioactive atoms that have large masses undergo radioactive decay by releasing a particle that is identical to a helium-4

nucleus
Chemistry
1 answer:
alexira [117]3 years ago
3 0
I think its a half life.
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If you have a 200.0 gram sample of carbon, how many moles of carbon do you have? A. 200.0 B. 17.0 C. 16.66 D. 12.01
lukranit [14]

Answer:

B. 17.0.

Explanation:

Hello!

In this case, considering that based on the atomic mass of the carbon atom, which means that 1 mole of carbon weights 12.01 grams, we can set up the following proportional factor to compute the moles of carbon in 200.0 grams:

200.0gC*\frac{1molC}{12.01gC}\\\\17.0molC

Thus, the answer would be B. 17.0.

Best regards!

7 0
3 years ago
Koby decides to change the amount of vinegar. He will keep the amount of baking soda constant at ½ teaspoon. He will run three t
Wittaler [7]

Answer: When baking soda and vinegar are combined, a new substance is produced. The carbon dioxide gas soon foams up in the mixture. Carbon dioxide, water, and sodium acetate are generated when sodium bicarbonate and acetic acid react.As Kobe adds additional baking soda and vinegar, the reaction will also become stronger.

Explanation: <em>well to be completely honest I don't see any answer choices so I'm going to assume that this is a writing question</em>

5 0
3 years ago
Sea water, a solution composed of a variety of salts dissolved in water. The salt is the . Soda water, a solution composed of ca
VladimirAG [237]

Answer:

In sea water;

The salt is the solute while the water is the solvent

In soda water;

The water is the solvent, the carbon dioxide is the solute

In air;

The nitrogen is the solvent while the oxygen and the other substances in small amounts are the solutes

Explanation:

A solution is a homogeneous mixture of two or more substances which includes a solvent and a solute. A solute in a solution is dissolved in the solvent of the solution.

Therefore, the solvent is the major part of a solution as it takes in the solvent to form the solution.

In sea water, a solution with a high concentration of salts

The salt is the solute while the water is the solvent

In soda water,  which is a mixture of CO₂ in water,

Here we have in the soda solution, the water is the solvent while the carbon dioxide is the solute

The water is the solvent, the carbon dioxide is the solute

Air a solution made up by a mixture of Nitrogen 78%, oxygen 21%, and small amount of water carbon dioxide and argon

The nitrogen is the solvent while the oxygen and the other substances in small amounts are the solutes.

8 0
3 years ago
A sample of oxygen gas at a pressure of 0.656 atm and a temperature of 27.2 °C, occupies a volume of 10.7 liters. If the gas is
sladkih [1.3K]

Answer:

The correct answer is 0.536 atm.

Explanation:

The formula to use to solve the given question is,

P1V1 = P2V2

Based on the given information, the initial pressure (P1) of the oxygen gas is 0.656 atm, the initial volume (V1) is 10.7 L. The new volume (V2) given is 13.1 L, there is a need to find the new pressure of the gas (P2).

Now putting the values in the above equation we get,

0.656 atm * 10.7 L = P2 * 13.1 L

P2 = 0.656 atm*10.7 L/13.1 L

P2 = 0.536 atm

3 0
3 years ago
What would be your reaction to a claim that a new element had been discovered, and it fit between tin (Sn) and antimony (Sb) in
Anton [14]

Answer:

As explained

Explanation:

My reaction will be positive and I will feel elated that a new elements has been discovered as this will be a modification of the earlier claim by berzelius and the likes that there are over 106 known elements ; Metal, Non Metals and Metalloids.

However, fitting the new discovered element in between Tin and antimony may be an issue, as the physical properties of the new elements has to be known, its melting point, metals or non metals as this is paramount to be able to classify the elements. if the elements fits in between tin and antimony, it is an indication that the elements is mot likely a metal or non-mental and may belong to group IVB or VB. Another issue is, the discoverer will have to create his own periodic table to be able to stand in with the discovery of Dimitriy Mendelev.

8 0
4 years ago
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