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3 years ago

How many molecules of O2 are there in 2.0 moles of oxygen?

Chemistry

1 answer:

nignag [31]3 years ago

5 0

28 molecul are in mol of ox

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The correct name for HIO2?

valentinak56 [21]

Answer:

iodous acid

Explanation:

iodous acid would also be known as HIO2

6 0

2 years ago

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0144 0.0144 M solution. The pH of the resulting solution i

alexdok [17]

Answer:

The value of dissociation constant of the monoprotic acid is $1.099\times 10^{-3}$ .

Explanation:

The pH of the solution = 2.46

$pH=-\log[H^+]$

$2.46=-\log[H^+]$

$[H^+]=0.003467 M$

$HA\rightleftharpoons H^++A^-$

Initially

0.0144 0 0

At equilibrium

(0.0144-x) x x

The expression if an dissociation constant is given by :

$K_a=\frac{[A^-][H^+]}{[HA]}$

$K_a=\frac{x\times x}{(0.0144-x)}$

$x=[H^+]=0.003467 M$

$K_a=\frac{0.003467 \times 0.003467 }{(0.0144-0.003467 )}$

$K_a=1.099\times 10^{-3}$

The value of dissociation constant of the monoprotic acid is $1.099\times 10^{-3}$ .

3 0

3 years ago

A spherical balloon initially contains 25m3 of helium gas at 20o C and 150 kPa. A valve is now opened and the helium is allowed

Tpy6a [65]

Find the attachment for complete solution

6 0

2 years ago

1.) What are the two broad categories that elements can be divided into?

hoa [83]

Answer:

1) Metals and nonmentals

2) Elements: Oxygen ( $O_{2} \\$ ) , Nitrogen ( $N_{2}$

3) Compounds: Carbon Dioxide $CO_{2}$ , Methane $CH_{4}$ , Nitrogen Dioxide $NO_{2}$

Explanation:

5 0

3 years ago

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go

alexira [117]

<u>Answer: </u>The correct answer is Silver.

<u>Explanation:</u>

Specific heat of fusion is defined as the amount of heat which is required to raise the temperature of 1 gram of a substance to 1°C. It is generally expressed in kJ/mol

We are required to find the substance which require more heat. For that we need to know the specific heat of all the substances.

The substance which have the highest specific heat, will require more heat.

The specific heat of the given substances are:

Silver = 11.3 kJ/mol

Sulfur = 1.7175 kJ/mol

Water = 5.98 kJ/mol

Lead = 4.799 kJ/mol

The specific heat of silver is the highest and hence, will require more heat.

Hence, the correct answer is silver.

7 0

2 years ago