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3 years ago

What are the redox reactions that take place?

Chemistry

1 answer:

Afina-wow [57]3 years ago

5 0

Answer:

Zinc metals was oxidized ,zinc ions were reduced

Explanation:

The zinc atoms lose electrons and becomes oxidized . And zinc ions gain electrons (becomes reduced)

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Where do elements in the human body tend to be located on the PERIODIC TABLE? (NOT PERCENTAGES PLEASE)

Ghella [55]

Answer:

Oxygen, Carbon, Hydrogern, Nitrogen, Sulfur, and Chlorine are all non-metals

Calcium, Potassium, Sodium, and Magnesium are all metals

Explanation:

8 0

3 years ago

What do cations and anions form?

melomori [17]

Answer: Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. The electrostatic attraction between the positives and negatives brings the particles together and creates an ionic compound, such as sodium chloride.

7 0

3 years ago

Calculate the molar concentration of HA (90.2 g/mol) in a solution that has a specific gravity of 1.24 and is 64% HNO3 (w/w).

ser-zykov [4K]

Answer:

Explanation:

Hello,

In this case, considering the given specific gravity we are to compute the density of the 64% HNO3 solution:

$\rho=1.24*1g/mL=1.24g/mL$

In such a way, since the given solution of nitric acid is 64 % by mass, we've got:

$\frac{64gHNO_3}{100g\ solution}$

Thus, by using the previously computed density and the molar mass of HA (90.2 g/mol) we can compute the required molar concentration as follows:

$M=\frac{(100g-64g)HA}{100g\ solution}*\frac{1.24g\ solution }{1mL \ solution}*\frac{1000mL\ solution}{1L\ solution}*\frac{1molHA}{90.2gHA} \\\\M=4.95M$

Regards.

8 0

3 years ago

Which of the following statements are true of acids and bases?

gtnhenbr [62]

A. Acids increase the number of OH- ions in a solution. FALSE
B. Bases increase the number of OH- ions in a solution. TRUE
C. Acids increase the number of H+ ions in a solution. TRUE
D. Bases increase the number of H+ ions in a solution. FALSE

8 0

3 years ago

What mass of iron is formed when 10 grams of carbon react with 80 grams of iron iii oxide?

yKpoI14uk [10]

Answer:

55.85 grams of Fe is formed.

Explanation:

Identify the reaction:

2Fe₂O₃ + 3C → 4Fe + 3CO₂

Identify the limiting reactant, previously determine the mol of each reactant

(mass / molar mass)

10 g / 12 g/m = 0.83 moles C

80 g / 159.7 g /m = 0.500 moles Fe₂O₃

2 moles of oxide need 3 moles of C, to react

0.5 moles of oxide, will need ( 0.5 . 3)/ 2 = 0.751 mol

I have 0.83 moles of C, so C is the excess.

The limiting is the oxide.

3 mol of C need 2 mol of oxide to react

0.83 mol of C, will need (0.83 . 2)/ 3 = 0.553 mol of oxide, and I only have 0.5 (That's why Fe₂O₃ is the limiting)

Ratio is 2:4 (double)

If I have 0.5 moles of oxide, I will produce the double, in the reaction.

1 mol of Fe, will be produce so its mass is 55.85 g

5 0

3 years ago