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Evgen [1.6K]
3 years ago
6

What is the mass of 1 centimeter cubes of gold

Chemistry
1 answer:
steposvetlana [31]3 years ago
8 0
The answer is: The change of 1 cc - cm3 ( cubic centimeter ) unit of a gold amount equals = to 19.28 g ( gram ) as the equivalent measure for the same gold type.
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If a 500 ml sample of water contains 2.6 x 10-6 g of iron, what is the concentration of iron in ppb?
Anastasy [175]

The concentration of iron in ppb is 5.2 ppb

In atmospheric chemistry, PPM( parts per million) and PPB( parts per billion) units are used to express the concentration of gases. PPB stands for parts per billion, while PPM stands for parts of gas per million parts of air.

2.6 × 10⁻⁶ grams of iron in 500 ml of water.

Now, converting milliliter into liter:

500 mL = 500 mL × ( 1L / 1000 mL ) = 0.5 L

Now for ppm, mass must be in mg.

2.6 × 10⁻⁶ grams = 2.6 × 10⁻⁶ grams × ( 1000 mg / 1 grams ) = 2.6 × 10⁻³ mg

Then, the concentration of iron in ppm will be:

2.6 × 10⁻³ mg / 0.5 L = 5.2 × 10⁻³ ppm

Now, 1 ppm = 1000 ppb

Therefore,

5.2 × 10⁻³ ppm × 10³ = 5.2 ppb

Learn more about concentration here:

brainly.com/question/17206790#:~:text=15%20people%20helped-,Answer%3A,either%20solvent%20or%20total%20solution.

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8 0
1 year ago
25 g of a compound is added to 500 mL of water if the freezing point of the resulting solution is
vlabodo [156]

Answer:

a)   119 g/mol

Explanation:

-We apply the formula for freezing point depression to obtain the molality of the solution:

\bigtriangleup T_f=K_fm, \  \ K_f=1.36\textdegree C/m\\\\\therefore m=\frac{\bigtriangleup T_f}{K_f}\\\\=\frac{0.57\textdegree C}{1.36\textdegree C}\\\\=0.4191\ mol/Kg\\\\

#We use the molality above to calculate the molar mass:

m=\frac{0.4191\ mol}{1\ Kg}=\frac{25\ g}{0.5\ Kg}\\\\\therefore 1 \ mol=\frac{25\ g}{0.5\ Kg}\times\frac{1\ Kg}{ 0.4191}\\\\=119.3033\approx 119\ g/mol

Hence, the molar mass of the compound is 119 g/mol

5 0
3 years ago
A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used
PIT_PIT [208]

Answer:

Distillation

Explanation:

The method of distillation can be used to separate the two liquids, if their boiling point is known. The liquid with lower boiling point will be evaporated and its vapours will be captured, while the liquid with higher boiling point will remail in the container in the liquid state.

7 0
2 years ago
which structures are found in eukaryotic cells a.chloroplast b. membrane bound organelles c. mitochondria d. nucleus e. pili
olasank [31]
Is it asking for multiple answers? 
If not the nucleus is one organelle found in the <span>eukaryotic.
Hope This Helps :)</span>
4 0
3 years ago
Read 2 more answers
Which of the following is not part of the proper protocol for using acids and bases?
Anni [7]

Answer:

B.Add acid to water,not water to acid

Explanation:

they should not be mixed

8 0
3 years ago
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