How can you tell if an electric charge is present?

1 answer:

7 0

If an element is written with a plus (+) or minus (-) symbol in the superscript then the element is either an anion or cation ( ion)

Ex : H₂ -----> stable or elemental form

Na⁺------> Cation

Cl⁻------> Anion

Technically an atom have positive charge when it loses its valence electrons and negative charge when it gains electrons.

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How many molecules are contaiined in 125 grams of water, H2O?

vladimir1956 [14]

Answer:

Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g . 2.7144moles H2O ⋅6.022⋅1023molec.

Explanation:

7 0

2 years ago

Honeybee venom is a solution that contains formic acid, which gives the venom an approximate ph of 5.0. which substance is more

Genrish500 [490]

Those substances which has pH less than 5 are more acidic than Honeybee Venom. Some of them are listed below along with their pH scale,

1) <span>Acid rain and Tomato Juice has a pH of 4.

2) Soda and Orange Juice has a pH of 3.

3) Vinegar and Lemon Juice has pH of 2.

4) Gastric acid has a pH of 1.

5) Battery Acids have pH of zero.</span>

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3 years ago

Is it difficult or easy to obtain hydro power

Paha777 [63]

Answer:yes

Explanation:

cause yes

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2 years ago

A student is adding DI water to a volumetric flask to make a 50% solution. Unfortunately, he was not paying attention and filled

dalvyx [7]

Answer:

His results will be skewed because there was more water than stock solution. Which would cause the percentage solution to be less than 50% therefore the density would be less than the actual value.

Explanation:

The solution will have percentage less than that of 50%. Therefore the density would be less than the actual value.

Suppose there should be 50 mL of the solution, and he added 60 mL. So 10 mL of the solution is added more.

Suppose the mass of the solute is m.

Originally, the density is = $\frac{m}{50}$ $\left(\frac{\text{mass}}{\text{volume}}\right)$