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Rashid [163]
3 years ago
8

The + symbol, on the products side, in a chemical equation means

Chemistry
1 answer:
malfutka [58]3 years ago
7 0

Explanation:

Used to separate one reactant or product from another

If it's helpful ❤❤

THANK YOU

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Who was given name black hole​
marin [14]

Answer:

John Archibald Wheeler

3 0
3 years ago
Tiny sacs in the lungs where gas exchange takes place are called ____?
SSSSS [86.1K]

Answer:

Alveoli

Explanation:

I hope this helps you.

8 0
3 years ago
Read 2 more answers
A 1.0 M H2S solution has a pH = 3.75 at equilibrium. What is the value of Ka?
MrRa [10]
The answer is 3.16*10-8
7 0
3 years ago
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You need to produce a buffer solution that has a pH of 5.50. You already have a solution that contains 10 mmol (millimoles) of a
balandron [24]

Answer:

56.9 mmoles of acetate are required in this buffer

Explanation:

To solve this, we can think in the Henderson Hasselbach equation:

pH = pKa + log ([CH₃COO⁻] / [CH₃COOH])

To make the buffer we know:

CH₃COOH  +  H₂O  ⇄   CH₃COO⁻  +  H₃O⁺     Ka

We know that Ka from acetic acid is: 1.8×10⁻⁵

pKa = - log Ka

pKa = 4.74

We replace data:

5.5 = 4.74 + log ([acetate] / 10 mmol)

5.5 - 4.74 = log ([acetate] / 10 mmol)

0.755 = log ([acetate] / 10 mmol)

10⁰'⁷⁵⁵ = ([acetate] / 10 mmol)

5.69 = ([acetate] / 10 mmol)

5.69 . 10 = [acetate] → 56.9 mmoles

6 0
3 years ago
Zn-64 = 48.63%
Ann [662]

Answer:

A = 65.46 u

Explanation:

Given that,

The composition of zinc is as follows :

Zn-64 = 48.63%

Zn-66 = 27.90%

Zn-67 = 4.10%

Zn-68 = 18.75%

Zn-70 = .62%

We need to find the  average atomic mass of the given element. It can be solved as follows :

A=\dfrac{48.63\times 64+27.90\times 66+4.1\times 67+18.75\times 68+0.62\times 70}{100}\\A=65.46\ u

So, the average atomic mass of zinc is 65.46 u.

5 0
2 years ago
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