When a helium atom is stripped of its two electrons, what's left are two protons and two neutrons. This "electron-less" atom is sometimes called a(n)a. quark.
b. beta particle.
c. alpha particle.
d. helium isotope.

Answers

Answer 1

Answer: alpha particle. You will see these in nuclear chemistry due to the fact that this is one of the type of radio active decay.

I hope this helps.

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When [OH-] changes from 10-9 to 10-11 in a solution: Kw = [H+][OH-]

What is the [H+] after the change?

Answers

According to the fact that [H+]*[OH-] is always equal Kw $= 1x10^(-14)$ , you can easily find concentration of [H+] by changing from $1*10^(-9)$ to $1*10^(-11)$
H increases, Kw is constant, therefore $10^-14 / 10^-11 = 10^-3.$
And you will have $Hence [H+] = 10^-3$ where pH is 3

Answer:

Explanation:

Give the formula for the alkane containing 100 hydrogens.

Answers

Answer: The alkane containing 100 hydrogens will be $C_(49)H_(100)$

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms.These are called as alkanes. The general formula for these hydrocarbons is $C_nH_(2n+2)$

As given number of hydrogen atoms is 100, therefore the value of (2n+2) = 100

2n = 98

n = 49

Thus the formula for the alkane containing 100 hydrogens will be $C_(49)H_(100)$

Final answer:

The alkane containing 100 hydrogens has the formula C49H100.

Explanation:

The formula for the alkane containing 100 hydrogens can be determined using the general formula for alkanes, which is CnH2n+2. To find the value of n, we can set up an equation:

100 = 2n + 2

Simplifying this equation, we get:

n = 49

Therefore, the formula for the alkane containing 100 hydrogens is C49H100.

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A desiccant is another name for a water molecule TRUE FALSE

Answers

Definitely, the answer is false. A desiccant is a substance used in order to absorb moisture in the surroundings. It is a hygroscopic material that removes humidity since humidity will aid in the degradation or destruction of materials which are sensitive to moisture.

2. Which of the following is the best definition of half-life for a radioactive substance?O A. Half of the amount of time required for all of the radioactive atoms to decay.
O B. The amount of time required for half of the radioactive atoms to decay.
O C. The amount of time required for each radioactive atom to decay halfway.
O D. All of the above.

Answers

Answer:

The amount of time required for each radioactive atom to decay halfway.

Explanation:

In radioactivity, which is the spontaneous emission of radiations from the nucleus of an unstable atom, each atom has a specific term called HALF-LIFE and is denoted by t1⁄2. Half-Life of an atom represents the amount of time it takes the nucleus of that atom to decay by half.

Therefore, based on the definitions given in the question, "The amount of time required for each radioactive atom to decay halfway" best describes HALF-LIFE.

- The first definition is wrong because it is NOT HALF THE AMOUNT OF TIME but half the amount of the atom while the second definition is wrong because it is NOT ALL THE ATOMS but a specific atom. Each atom has its own specific half-life.

Final answer:

The best definition of half-life for a radioactive substance is the amount of time required for half of the radioactive atoms to decay.

Explanation:

The best definition of half-life for a radioactive substance is:

B. The amount of time required for half of the radioactive atoms to decay.

The half-life is a characteristic property of a radioactive substance and represents the time it takes for half of the original amount of radioactive atoms to decay. It is independent of the amount of substance present and can be used to determine the rate of decay. For example, if the half-life of a substance is 10 days, after 10 days, half of the original amount will remain, after 20 days, a quarter will remain, and so on.

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What is the Celsius temperature of 1 mole of a gas that has an average kinetic energy of 3,866 joules?

Answers

Temperature can be calculated using the average kinetic energy. The ideal gas equation is being related to the average molecular kinetic energy.

PV = nRT
PV = (2/3) N(0.5mv^2)

By substituting and simplifying, we eventually get the equation.

KE = (3/2)RT
T = 3866 x 2 / 8.3145 x 3 = 309.98 K or 36.83 degrees Celsius

Calculate the mass in grams of 7.88 mol of RbMnO4