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3 years ago

1. What are the sources of water on Earth?

Chemistry

2 answers:

Lesechka [4]3 years ago

4 0

Rivers, oceans, lakes, ponds

Vinil7 [7]3 years ago

4 0

Ice caps, Glaciers, & Permanent Snow

Oceans, Seas, & Bays

Ground water

Fresh Water

Atmosphere (rain)

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What is the trend in electronegativity for elements on the periodic table? It decreases across a period and increases down a gro

lilavasa [31]

It increases across a period and decreases down a group. A good way to remember this is that fluorine is the most electronegative atom, and it's to the top right of the table.

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4 years ago

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DochEvi [55]

Na 1+ misses 1 electron

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3 years ago

Which of the following units is best when measuring the length of an object?

podryga [215]

Answer:metres

Explanation:It would be best to measure the length of an object in metric system such as millimeter, centimeter, mere etc..

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3 years ago

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Why air is classified as a mixture

Vika [28.1K]

Answer:

See explanation

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3 years ago

What is the concentration of the barium hydroxide solution if 50.0 mL of a 0.425 M HNO3 solution is required to neutralize a 36.

fomenos

The molarity of Barium Hydroxide is 0.289 M.

Explanation:

We have to write the balanced equation as,

Ba(OH)₂ + 2 HNO₃ → Ba(NO₃)₂ + 2 H₂O

We need 2 moles of nitric acid to react with a mole of Barium hydroxide, so we can write the law of volumetric analysis as,

V1M1 = 2 V2M2

Here V1 and M1 are the volume and molarity of nitric acid

V2 and M2 are the volume and molarity of Barium hydroxide.

So the molarity of Ba(OH)₂, can be found as,

$$ M2 = \frac{V1 \times M1}{2 \times V2}$

$$M2 = \frac{50 \times 0.425 }{2 \times 36.8}$

= 0.289 M

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3 years ago