Why do you need to acidify a solution ?

Answers

Answer 1

Answer: To acidify a solution would help it be closer to the neutral state (7 pH) if basic.

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What is a solid formed from liquid reactants during chemical reaction
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What is the principle called of the conservation of matter?
Layers of rock containing fossils, like the layers illustrated here, are MOST LIKELY composed of ______________ rocks. A) igneous B) sedimentary C) metamorphic D) crystallized

Write this number in standard notation.
1.986 x 10negative exponent 6 or 1.986 x 10^6

Answers

Answer:

$0.000001986$

Explanation:

We have the number $1.986*10^(-6)$ . Standard notation would basically be this number without the $10^(-6)$ part.

To get rid of this part, we need to move the decimal point 6 places to the left (we go left because it's negative 6, indicating division).

So, when we move the decimal point 6 places to the left, the resulting number is: $0.000001986$ , with 5 zeros after the decimal point before a nonzero number.

Thus, the answer is $0.000001986$ .

What takes longer to melt a small quantity or a large quantity?

Answers

Answer:

A large quantity

Explanation:

A large quantity will take much longer to melt compared to a small quantity of the same matter.

The rate of melt of a substance is particularly a function of the nature of the substance and the amount of energy supplied to it.

If we assume that we are dealing with different quantities of the same substance, then the one that has more mass will melt faster because less energy would be required to change its state.

A large quantity of matter will take more time to melt.

Zinc has the chemical symbol Zn and the atomic number 30. How many protons, neutrons, and electrons does an atom of zinc-69 have?A. 30 protons, 39, neutrons, 39 neutrons
B. 39 protons, 30 neutrons, 30 neutrons
C. 39 protons, 30 neutrons, 39 electrons
D. 30 protons, 39, neutrons, 30 electrons

Answers

Answer:

D. 30 protons, 39 neutrons, 30 electrons

Explanation:

The atomic number (Z) is the number of protons (p) in the nucleus. Since

Z = 30, p = 30.

In a neutral atom, the number of electrons (e) equals the number of protons. Since p = 30, e = 30.

The mass number (A) is the number of protons plus the number of neutrons (n).

A = p + n

For an atom of zinc-69,

69 = 30 + n Subtract 30 from each side and transpose

n = 39

Zinc has the chemical symbol Zn and the atomic number 30. D. 30 protons, 39, neutrons, 30 electrons

What is Zinc

Zinc has the chemical symbol Zn, and its atomic number is 30. This means that every atom of zinc contains 30 protons in its nucleus.

An atom of zinc-69 (Zn-69) is one that contains:

- 30 protons (since zinc has an atomic number of 30).

- 39 neutrons (subtract the atomic number from the mass number: 69 - 30 = 39).

- 30 electrons (in a neutral atom, the number of electrons is equal to the number of protons).

So, the correct option is option d 30 protons, 39 neutrons, 30 electrons.

Learn more about Zinc from

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There are seven major levels of classification. Kingdom and Phylum are just two of the levels. Which of the following are also major levels of classification?Choose all answers that are correct.

A.Class

B.Order

C.Family

D.Level

Answers

A) The class and C) Family would be the only accurate option. Here are the levels from largest to smallest: kingdom, phylum, class, order, family, genus and species.

What is the difference between fats and oils? A. Oils are lipids and fats are proteins.

B. At room temperature, fats are solid and oils are liquid.

C. Fats are lipids and oils are carbohydrates.

D. Fats are triglycerides and oils are waxes.

Answers

Answer:

B. At room temperature, fats are solid and oils are liquid.

Explanation:

Fats and oils are one of the the three macronutrients (the other two are protein and carbohydrates).

However, fats and oils are different from each other: fats are mainly obtained from animals, while oils are mainly obtained from vegetable sources.

The major difference between fats and oil is that fats are composed of high amounts of saturated fatty acids which makes them solid at room temperature, while oils are composed of mainly unsaturated fatty acids which makes them liquid at room temperature.

Note that: in daily use the two terms may be used interchangeably.

It is B. When at room temperature fats are solid and oils are liquids.

Multiply 3.2 mm times 5 mm and express the answer to the correct number of significant figures.