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1 year ago

What is the molarity of a solution containing 56 grams of LiF in 959 mL of solution?

Chemistry

1 answer:

andrezito [222]1 year ago

7 0

Answer:

2.25 M <========= I do not see this in your selection of answers !

Explanation:

Mole weight of Li F

( from periodic table ) = 6.94 + 18.998 = 25.938 gm/mole

56 gm / ( 25.938 gm /mole) = 2.15899 moles

2.15899 mole / (.959) L = 2.25 M

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HNO3 + S --> H2SO4 + NO Now identify the element oxidized and the element reduced. Which element is oxidized? Which element i

OleMash [197]

Answer: S is getting oxidized, N is getting reduced and O and H undergo no oxidation or reduction

Explanation:

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when oxidation number of a species decreases.

For the given chemical reaction:

$HNO_3+S\rightarrow H_2SO_4+NO$

On the reactant side:

Oxidation number of H = +1

Oxidation number of N = +5

Oxidation number of O = -2

Oxidation number of S = 0

On the product side:

Oxidation number of H = +1

Oxidation number of N = +2

Oxidation number of O = -2

Oxidation number of S = +6

As the oxidation number of S is increasing from 0 to +6. Thus, it is getting oxidized. Similarly, the oxidation number of N is decreasing from +5 to +2. Thus, it is getting reduced.

The oxidation numbers of O and H remain the same on both sides of the reaction. Thus, they are neither getting oxidized or reduced.

Hence, S is getting oxidized, N is getting reduced and O and H undergo no oxidation or reduction

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2 years ago

What is the hardest mineral listed here? A. quartz B. calcite C. gypsum D. corundum

a_sh-v [17]

The answer would be D. The only minerals harder than corundum is diamond.

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3 years ago

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13. Which could be true about an unknown sample with a pH of 7? (2 points)

laiz [17]

The best and most correct answer among the choices provided by your question is the first choice or letter A.

A ph of 7 contains only water.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

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What is the relationship between chemical equilibrium and the rates of forward and reverse reaction?

Nataly_w [17]

Answer:

Explanation:

the rate of a forward process must be exactly balanced by the rate of the reverse process.

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16. As he developed his periodic table, Mendeleev grouped the elements lithium,

Aleonysh [2.5K]

Answer:

the reactivity and the valence electrons

Explanation:

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you can go on to further explain what valence electrons are, explain what the group numbers are associated with the valence electrons and how valence electrons effect reactivity. further this, talk about how the three elements have the same number of valence electrons and therefore were grouped together

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