An element has an atomic number of 92 and a mass number of 234. how many neutrons does the element have? 192 142 92

Answers

Answer 1

Answer: the atomic number of an element is characteristic to that element. Atomic number is the number of protons of that element.
Mass number is the sum of protons and neutrons of the element.
since protons and neutrons have a mass of 1 unit each, they together make up the mass of the element.
atomic number - number of protons - 92
mass number - number of neutrons + protons = 234
number of neutrons = mass number - atomic number
neutrons = 234 - 92 = 142
answer is 142

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Which is the formula for the functional group in an amine?

Answers

An 'amine' is an organic compound primarily composed of carbon(C), hydrogen(H) and nitrogen (N).

Ammonia is a molecule in which the N atom is attached to 3 H atoms, in addition there is a lone pair of electrons on the central N atom. Amines are essentially derivatives of ammonia where one of more H atoms have been replaced by an alkyl (R) or aryl(Ar) group

For example:

R-NH2 == primary amine

R2-NH == secondary amine

R3N == tertiary amine

The amine functional group is R-NH2, 2 or 3 hydrogen atoms have been replaced by organic groups R, forming primary amine, secondary amine and tertiary amine.

hope this helps!

A piece of sodium metal can be described as

Answers

A piece of sodium metal can be described as a soft silvery white metal that is highly reactive and can sometimes cause explosions. This is the reason why it doesn't occur naturally as an isolated metal. Instead, different sodium containing compounds undergo different processes to isolate the sodium metal.

Answer:

D. a pure substance and an element.

Explanation:

IM JUST HIM

Calculate the number of moles of bromobenzene, magnesium, and benzophenone that you will use in this experiment. You will need to look up the molecular weights of each substance and the density of bro. A) Bromobenzene B) Magnesium C) Benzophenone D) None of the above

Answers

Final answer:

To calculate the number of moles in an experiment, you need to know the mass of the substance and its molecular weight. The number of moles is then found by dividing the mass by the molecular weight. This applies to any substance, including bromobenzene, magnesium, and benzophenone.

Explanation:

To calculate the number of moles of bromobenzene, magnesium, and benzophenone you will use in the experiment, we first need the molecular weights of each substance. The molecular weights determined from experimental data are crucial to this calculation. The number of moles of a compound is equal to the mass of the compound divided by its molecular mass. For example, if we consider a substance like benzene, the molecular formula is C6H6 which is derived from its empirical formula CH, and the ratio of the elements within it. Let's say you have 'm' grams of bromobenzene, 'n' grams of magnesium, and 'p' grams of benzophenone. Also, let the molecular weights of bromobenzene, magnesium, and benzophenone be 'M', 'N', and 'P' respectively. Then the number of moles of bromobenzene would be m/M, of magnesium would be n/N, and of benzophenone would be p/P. To get the exact values, you would need the specific weights of these substances in your experiment. Remember to ensure that the weights are in grams (for mass) and g/mol (for molecular weight) since the number of moles is a dimensionless quantity.

Learn more about calculating moles here:

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Why can't you turn pancakes back into the ingredients

Answers

Answer:

With pancakes, the chemical reaction is between a leavening agent – such as baking soda & baking powder – & an acidic ingredient – such as buttermilk – producing tiny bubbles of carbon dioxide gas. These bubble form throughout the pancake, and are trapped as the batter cooks and solidifies

Explanation:

since there is a chemical reaction the pancakes cant be changed back into the ingredients after done.

Answer:

heat is added making it a chemical change

Explanation:

Compare the shape and volume of solids, liquids and gases.

Answers

Solids have both fixed volumes and fixed shapes.
Liquids have fixed volumes, but their shapes depend upon the containers in which they are held.
Gases have neither fixed volumes nor fixed shapes, and expand to fill their containers.

What is the salt produced when calcium hydroxide, Ca(OH)2, reacts with phosphoric acid, H3PO4, in a neutralization reaction?

Answers

Explanation:

A neutralization reaction is a reaction in which two different compounds combine together and result in the formation of salt and water.

Foe example, $Ca(OH)_(2) + H_(3)PO_(4) \rightarrow Ca_(3)(PO_(4))_(2) + 6H_(2)O$

Therefore, salt of calcium phosphate $Ca_(3)(PO_(4))_(2)$ is formed along with formation of water when compounds $Ca(OH)_(2)$ and $H_(3)PO_(4)$ react together.

$3Ca(OH) _(2) +2H _(3) PO _(4)$ ⇒ $6H _(2) O+Ca _(3)(PO _(4)) _(2)$
Calcium phosphate. Which is your Ca3(PO4)2.

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The design of a new computer processor requires that electric current be carefully controlled. Why might an engineer want to use a metalloid when designing a new computer processor?