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kvv77 [185]
3 years ago
13

A gold nugget has a volume of 20.0 cm3 and its density is 19.3 g/cm3. What is the mass of the gold nugget?

Chemistry
2 answers:
Mariulka [41]3 years ago
8 0

Answer:

mass of the gold nuggets = 386 grams

Explanation:

Density is the mass of a substance divided by it volume. Density compares the amount of matter in a substance to it volume. It talks about how tightly packed molecules of substance are compacted together. It is the ratio of mass per volume. The S.I unit of a density is kilogram per cubic meters. it can also be represented as gram per cubic centimeters.

Mathematically ,

density = mass/volume

mass of nugget = ?

density of the nugget = 19.3 g/cm³

volume of the nugget = 20.0 cm³

density = mass/volume

Make mass the subject of the formula

mass = density × volume

mass = 19.3 × 20

mass = 386 grams

Mass talks about how much matter a substance contain .It can be measured in grams or kilograms

salantis [7]3 years ago
5 0
Density * Volume = Mass

Now we substitute the values in.

19.3 g/cm^3 + 20 cm^3 = 386 g

Mass = 386 g
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3 years ago
Briefly describe the action of hardwater with soap​
morpeh [17]

Answer:

The correct answer is - hard water reacts to form the calcium or magnesium salt of the organic acid of the soap.

Explanation:

Soaps are made up of fatty acids or oils by treating with strong alkali and are salts of sodium and potassium. Hard water, on the other hand, has a high concentration of minerals in comparison to soft water. When hard water and soap are mixed together the salts of the minerals like Ca2+ and Mg2+ ions present in hard water react with fatty acids of the soap.

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4 0
2 years ago
Determine the molar mass of Ze(NO3)2. (Ze=55.85 N=14.01 O=16.00) *<br> Help
Arturiano [62]

Answer:

179.87 g/mol

Explanation:

First you need to determine the number of each elements in the molecule.  This information comes from the molecular formula.  

Ze(NO3)2 tells us that there is 1 Ze atom and 2 NO3 anions per molecule.  each NO3 anion will have 1 nitrogen and 3 oxygens.  Due to that, one molecule of Ze(NO3)2 will have 1 atom of Ze, 2 atoms of nitrogen (N), and 6 atoms of oxygen (O).

Next you need to add all of the individual atom's molar masses to get the over all molar masses.  The molar masses of each element is in the question but it can also be found on the periodic table.

molar mass of Ze(NO3)2 = 55.85g/mol + (14.01g/mol*2) + (16.00g/mol*6)

molar mass of Ze(NO3)2 = 179.87 g/mol

I hope this helps.

5 0
2 years ago
A package of chocolate instant pudding contains 2640 mg of sodium. how many grams of sodium are in the pudding?
alexgriva [62]

Answer:

2.640

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4 0
1 year ago
78.9 + 890.43 - 21 = 9.5 x 10^2
maria [59]

948 or 9.48 x 10^2

There are two sets of rules for significant figures

• One set for addition and subtraction

• Another set for multiplication and division

You used the set for multiplication and division.

This problem involves addition and subtraction, and the rule is

The number of places after the decimal point in the answer must be <em>no greater than the number of decimal places in every term</em> in the sum.

Thus, we have

78.9

+890.43

-21.

= 948.33

The "21" term has the fewest digits after the decimal point (none), so the answer must have no digits after the decimal point.

To the correct answer is 948 = 9.48 x 10^2. It has three significant figures.

8 0
3 years ago
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