CHEMISTRY HIGH SCHOOL

The density of an object is defined as mass per unit volume. Mathematically we write that: D = M/V. Rearrange this expression for: (a) M = ? (b) V = ?

Answers

Answer 1
Answer: The density of an object is defined as mass per unit volume. This can be rearranged to determine the mass or the volume of an object. For mass, the expression of density is rearranged to: M = VD. For the volume, the density is rearranged to: V = D/M.

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What is the definition of a Double Displacement Reaction?

Answers

Answer:

A double displacement is a type of chemical reaction that in which the reactant ions exchange places to form new products

Explanation:

I took the quiz

Answer:

When two different atoms or groups of atoms are exchanged, then it is a double displacement reaction.

How many shells will transition metals use to bond with other elements? (site 2)

Answers

Transition metals can use the 2 outermost shells to bond with other elements.

A fruit and oatmeal bar contains 142 nutritional calories. Convert this energy to calories

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Answer is: a fruit and oatmeal bar contains 142000 calories.
A nutritional calorie, or kilocalorie, is equal to 1000 calories.
E = 142 kcal · 1000 cal/kcal.
E = 142 000 cal.
Calorie (cal), or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius.
One small calorie is approximately 4.2 joules.
A calorie is a unit of energy.

Final answer:

142 nutritional calories (Cal) are equal to 142,000 calories (cal) since one nutritional Calorie is equivalent to 1000 scientific calories (cal).

Explanation:

To convert 142 nutritional calories to calories, you need to understand the relationship between the two units. In nutrition, when we say 'calories', we actually mean 'kilocalories' (kcal). One nutritional calorie (with an uppercase C) is equal to one kilocalorie (kcal), and one kilocalorie is equivalent to 1000 calories (with lowercase c).

Therefore, 142 nutritional calories (Cal) are equivalent to 142,000 calories (cal).

The conversion formula is as follows:
142 Cal * 1000 = 142,000 cal

How many molecules is .360 mol of water

Answers

2.168 x 10²³ is the answer :D

Isomers have different molecular formulas. t/f

Answers

Answer:

False

Explanation:

Isomers are chemicals with the same molecular formula, but different structures.

Which element has the greatest average atomic mass?

Answers

The awnser is Hydrogen. It had the greatest average atomic mass
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