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3 years ago

Zinc nitrate can be produced by reacting an acid and a metal oxide.

Chemistry

1 answer:

strojnjashka [21]3 years ago

4 0

Answer:

The acid is Nitric Acid and the metal zinc

Explanation:

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What is the purpose of adding base in the aldol condensation reaction? choose the best answer.

Paladinen [302]

Base is used in aldol condensation reaction

because it is an organic reaction to form enolate ion, the OH bond present in base help to remove Acidic hydrogen of enolate ion.

6 0

3 years ago

Write a balanced half-reaction for the oxidation of chromium ion Cr + 3 to dichromate ion Cr 2 O − 2 7 in basic aqueous solution

SOVA2 [1]

Answer:

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l) + 6 e⁻

Explanation:

In order to balance a half-reaction we use the ion-electron method.

Step 1: Write the half-reaction

Cr³⁺(aq) = Cr₂O₇²⁻(aq)

Step 2: Perform the mass balance, adding H₂O(l) and OH⁻(aq) where appropriate

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l)

Step 3: Perform the electric balance, adding electrons where appropriate

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l) + 6 e⁻

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3 years ago

A compound contains 70.0 or iron and 30.1 oxygen what is its empirical formula

Ratling [72]

Answer:

The empirical formula would be Fe2o3

Explanation:

you first take the grams or the percent of each element, then transform them from grams to moles.

After getting the number of mols you want to divide each mol by the lowest number of mol.

EX) for this problem the number of moles of Fe(iron) would be 1.253 mol and the moles for the oxygen would be 1.881 mol... so you take the lowest, 1.253, and divide both to get what's called a mol fraction.

1.253/ 1.253 =1Fe

1.881/ 1.253= 1.5

now we want a whole number since we're finding the formula of a compound... and since there is a 1.5 you would multiple that by 2 giving you 3 for oxygen and giving you 2 for iron.

then these whole numbers will give you the subscripts that's needed for your empirical formula :)

- Hope this helps!!!

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4 years ago

Nguyên tố A có nguyên tử khối nặng gấp 4 lần nguyên tử oxi. A là

Lisa [10]

Answer:

di ko gets haha yawa ka jj

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3 years ago

How do scientists do background research on topics they have question about

Aliun [14]

They use information from other things that relate to that topic and then use that to do their research

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4 years ago