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2 years ago

Which two terms describe the pH scale

2 answers:

8 0

Answer: a term used to describe a solution that has a value below 7 on the ph scale. ... pH 7 is neutral which is exactly in between acidic and alkaline. Alkalinity is anthing ... What is the pH scale in terms of acids and bases? it is a scale that ... The pH scale is logarithmic; the difference between two units is x10.

Explanation: it's just that simple

KengaRu [80]2 years ago

6 0

Answer:

 pH scale is a device used to measure the concentration of Hydrogen ions (H+) in the solution.

Explanation:

pH scale measurement ranges from 0 to 14 and most arrangements do fall inside this range, in spite of the fact that it's conceivable to get a pH beneath 0 or over 14.

Of which 0 to 6.9 is acidic , 7 is neutral , and 7.1 to 14 is basic. Anything underneath 7.0 is acidic, and anything above 7.0 is basic, or essential.

So By using ph scale the acidic and basic nature of the solution can be measured.

So the terms used are acidity and basicity.

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How many atoms of hydrogen are there in 18g of water ?

Bingel [31]

Answer:

They are 1.204×10^24 atoms of hydrogen present in 18 grams of water. In order to calculate this,it is necessary to compute the number of hydrogen moles present in the sample.

6 0

2 years ago

When comparing the two chair conformations for a monosubstituted cyclohexane ring, which type of substituent shows the greatest

Aleksandr [31]

Answer:

See the explanation

Explanation:

In this case, we have to keep in mind that in the monosubstituted product we only have to replace 1 hydrogen with another group. In this case, we are going to use the methyl group $CH_3$ .

In the axial position, we have a more steric hindrance because we have two hydrogens near to the $CH_3$ group. If we have more steric hindrance the molecule would be more unstable. In the equatorial positions, we don't any interactions because the $CH_3$ group is pointing out. If we don't have any steric hindrance the molecule will be more stable, that's why the molecule will the equatorial position.

See figure 1

I hope it helps!

6 0

2 years ago

How many particles of Na are there in 1.43g of a molecular compound with a Molar mass of 23g?

Olin [163]

Answer:

3.74 x 10²² particles

Explanation:

Given parameters:

Mass of compound = 1.43g

Molar mass of compound = 23g

Unknown:

Number of particles of sodium = ?

Solution:

To find the number of particles of Na in the compound, we need to obtain the mass of sodium from the total mass given;

Mass of sodium = $\frac{molar mass of Na}{molar mass of compound} x mass of sample$

= $\frac{23}{23} x 1.43g$

= 1.43g

Now find the number of moles of this amount of Na in the sample;

Number of moles = $\frac{mass}{molar mass}$ = $\frac{1.43}{23}$ = 0.062mole

Now;

1 mole of substance = 6.02 x 10²³ particles

0.062 mole of substance = 0.062 x 6.02 x 10²³ particles

= 3.74 x 10²² particles

7 0

2 years ago

Four properties of water are listed. It reacts with halogens to form oxygen gas as one of the products. It is transparent and ta

Bezzdna [24]

Chemical property is the property of the substances that describes the ability of the substance to involve in chemical reactions. Physical property is that which does not change the chemical composition of the substances. The following properties of water that it is transparent and tasteless in its pure form and it freezes at a temperature of $0^{0}C$ are physical properties as they simply indicate the change in physical state without any change in chemical composition of water.

The other two properties that water reacts with halogens to form oxygen gas as one of the products and water decomposes to form hydrogen and oxygen are chemical properties as the chemical composition of water changes in the given reaction.

Therefore the correct answer is b. 1 and 4

8 0

3 years ago

In what situation can a mixture always be called a solution

Zolol [24]

A mixture can be called as a solution when the mixture is homogeneous

4 0

3 years ago

Which two terms describe the pH scale​

Which two terms describe the pH scale