2 years ago

What is the pH of a solution whose [H⁺] is 2.7 x 10⁻⁴ M?

Chemistry

1 answer:

Firdavs [7]2 years ago

3 0

Answer:

Here is the solution..Hope it helps:)

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Which element is more reactive in water? -Na -Mg

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Answer:

sodium

Explanation:

sodium is the second most reactive. Magnesium being the least reactive

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3 years ago

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What property did mosely use to organize the periodic table?

zhenek [66]

Answer:

nitrogen i think but not sure

Explanation:

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3 years ago

The thin outer layer of Earth, called the crust, contains only 0.50 percent of Earth's total mass and yet is the source of almos

Rzqust [24]

Answer:

The mass of silicon in kilograms in Earth's crust is $7.2729\times 10^{21} kg$ .

Explanation:

Mass of Earth = $5.9\times 10^{21} tons$

(1 ton= 2000 lb)

(1 lb =453.6 g)

1 ton = 2000 × 453.6 g =907,200 g

Mass of Earth = $5.9\times 10^{21}\times 907,200 g=5.3524\times 10^{27} g$

Percentage of earth crust = 0.50%

Mass of earth crust = M

$0.50\%=\frac{M}{5.3524\times 10^{27}}\times 100$

$M=2.6762\times 10^{25} g$

Percentage of the silicon in Earth's crust = 27.2 %

Mass of silicon in in Earth's crust = m

$Si\%=\frac{m}{M}\times 100$

$27.2\%=\frac{m}{2.6762\times 10^{25} g}\times 100$

$m = 7.2792\times 10^{24} g=7.2729\times 10^{21} kg$

1000 g = 1 kg

The mass of silicon in kilograms in Earth's crust is $7.2729\times 10^{21} kg$ .

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3 years ago

When Aluminum foil is added to a solution of Copper (II) chloride (blue color solution), the following reaction occurs.

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Which of the following is a prokaryote that contains a cell wall, cell membrane, and flagellum?

Reil [10]

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Bacteria

Explanation:

hope this helps please gimme brainliest

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3 years ago