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2 years ago

Explain at particle level whether seawater is a pure substance or a mixture

Chemistry

1 answer:

otez555 [7]2 years ago

7 0

Answer:

Seawater is a mixture of many different substances. Some of these substances can be observed when the water in seawater evaporates and leaves behind salt. Water, H2O, is a pure substance, a compound made of hydrogen and oxygen.

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A 800g/cm³ boulder has a density of 8g/cm³ what is the volume

kirill [66]

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2 years ago

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If you are using 3.00% (mass/mass) hydrogen peroxide solution and you determine that the mass of solution required to reach the

Maurinko [17]

Answer:

0.004522 moles of hydrogen peroxide molecules are present.

Explanation:

Mass by mass percentage of hydrogen peroxide solution = w/w% = 3%

Mass of the solution , m= 5.125 g

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$w/w\% = \frac{x}{m}\times 100$

$3\%=\frac{x}{5.125 g}\times 100$

$x=\frac{3\times 5.125 g}{100}=0.15375 g$

Mass of hydregn pervade in the solution = 0.15375 g

Moles of hydregn pervade in the solution :

$=\fraC{ 0.15375 g}{34 g/mol}=0.004522 mol$

0.004522 moles of hydrogen peroxide molecules are present.

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3 years ago

How to balance the equation Mg2+HO2=Cu3O+H2<br><br>

Mariulka [41]

I think the answer is 2Mg + H2O4 = Cu12O4 + 2H

I’m really not sure though so it might be wrong… I’m not the best at balancing equations lol

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2 years ago

How is 0.00069 written in scientific notation?

vfiekz [6]

6.9 x 10^-4 would be .00069 written in scientific notation

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3 years ago

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ANEK [815]

Igneous rocks are found where plates diverge, as lava rises and fills the gap between the plates. Igneous rocks also form where plates converge. The subducting plate melts as it sinks into the crust of the Earth, and the melt rises into the overriding plate forming volcanoes.

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