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nikklg [1K]
3 years ago
15

What mass of magnesium hydroxide is required to create a 441 mL solution with a pH of 12.52?

Chemistry
1 answer:
marshall27 [118]3 years ago
4 0

Answer:

0.423g

Explanation:

akording to mass = concetration x volume

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Rosa drew a flow chart of the carbon cycle.
Lisa [10]

The correct Answer is A.

The Flow chart of the Carbon Cycle, will look as follows:

1. Carbon dioxide in the atmosphere.

2. Producers undergo photosynthesis (in this process plants among other producers like algae, use CO2 to produce energy).

3. Consumers eat producers (a primary level of consumer like a rabbit eats the producers or plants).

4. Decomposers return Carbon to the soil and release waste.

And the  cycle continues again, by going back to step 1.

7 0
2 years ago
Read 2 more answers
How much positive charge is in 0.7 kg of lithium? with each atom having 3 protons and 3 electrons. The elemental charge is 1.602
hichkok12 [17]

Explanation:

As a neutral lithium atom contains 3 protons and its elemental charge is given as 1.602 \times 10^{-19} C. Hence, we will calculate its number of moles as follows.

          Moles = \frac{mass}{\text{molar mass}}

                     = \frac{0.7 \times 1000 g}{7 g/mol}

                     = 100 mol

According to mole concept, there are 6.023 \times 10^{23} atoms present in 1 mole. So, in 100 mol we will calculate the number of atoms as follows.

        No. of atoms = 100 \times 6.023 \times 10^{23}

                               = 6.023 \times 10^{25} atoms

Since, it is given that charge on 1 atom is as follows.

                     3 \times 1.602 \times 10^{-19}C

                    = 4.806 \times 10^{-19}C

Therefore, charge present on 6.023 \times 10^{25} atoms will be calculated as follows.

    6.023 \times 10^{25} atoms \times 4.806 \times 10^{-19} C

            28.95 \times 10^{6}C

Thus, we can conclude that a positive charge of 28.95 \times 10^{6}C is in 0.7 kg of lithium.

3 0
2 years ago
The atomic mass is equal to what?​
dsp73

Answer:

The mass number

Explanation:

I hope this helps.

4 0
3 years ago
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NaOH  + H2SO4 =
mariarad [96]
2NaOH+H_2SO_4\Rightarrow\ Na_2SO_4+2H_2O\\
NaOH+HNO_3\Rightarrow\ NaNO_3+H_2O\\
Cu(OH)_2+2HCl\Rightarrow\ CuCl_2+2H_2O\\
Cu(OH)2+H_2SO_4\Rightarrow\ CuSO_4+2H_2O\\
Cu(OH)_2+2HNO_3\Rightarrow\ Cu(NO_3)_2+2H_2O
3 0
2 years ago
Are the activities exothermic or endothermic?​
Alexandra [31]

Answer:

The first 5 are exothermic reaction because heat is in product means heat is evolved or given out.

And last no reaction shows that heat is required so last reaction is endothermic reaction.

Explanation:

And heat is evolved in exothermic reaction and heat is absorbed in endo thermic reaction

6 0
3 years ago
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