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xxMikexx [17]
3 years ago
9

Which statement is true about molarity and percent by mass? (3 points)

Chemistry
2 answers:
lakkis [162]3 years ago
5 0

Answer:  The correct option is, They are different units of concentration.

Explanation: Molarity : It is defined as the number of moles of solute present in one liter of solution.

Usimov [2.4K]3 years ago
3 0

Answer: They ate different units of concentration

Explanation: I took the test

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Bingel [31]
The moon phases maybe? Can I see the passage possibly?
8 0
3 years ago
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What is the mass of 2.30 mol of oxygen gas, O2 ?
ruslelena [56]

Answer:

0.165

Explanation:

Feel free to let me know if this is wrong because I have seen the question before but cannot really remember!

3 0
3 years ago
How many protons and neutrons are in the nucleus of isotope with mass of 68.926 amu?
Sidana [21]
There are 30 protons and 39 neutrons in the nucleus.

This must me the isotope of an element with an atomic mass close to 69 u.
The only candidates are Zn and Ga.
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Ga has a gallium -69 isotope with mass 68.925 u.
The isotope is probably _{30} ^{69}Zn.
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4 0
3 years ago
Write any 4 reactions of compounds or element with water.​
jarptica [38.1K]

Answer:

A common characteristic of most Alkali Metals is their ability to displace H2(g) from water. This is represented by their large, negative electrode potentials. In this event, the Group 1 metal is oxidized to its metal ion and water is reduced to form hydrogen gas and hydroxide ions. The general reaction of an alkali metal (M) with H2O (l) is given in the following equation:2M(s)+2H2O(l)⟶2M+(aq)+2OH−(aq)+H2(g)(1)

Explanation:

6 0
3 years ago
What is the [ch3co2-]/[ch3co2h] ratio necessary to make a buffer solution with a ph of 4.34? ka = 1.8 × 10-5 for ch3co2h?
xeze [42]
According to Henderson–Hasselbalch Equation,

                                    pH  =  pKa + log [Acetate] / [Acetic Acid]

As,
           pKa = -log Ka
           pKa = -log (1.8 × 10⁻⁵)
           pKa =  4.74
So,
                               pH  =  4.74 + log [Acetate] / [Acetic Acid]

                                  4.34  =  4.74 + log [Acetate] / [Acetic Acid]

                        4.34 - 4.74  = log [Acetate] / [Acetic Acid]

                                 -0.40  =  log [Acetate] / [Acetic Acid]

Taking Antilog on both sides,

               [Acetate] / [Acetic Acid]  =  0.398
5 0
3 years ago
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