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artcher [175]
3 years ago
8

In 2.23x10^24 atoms of k2co3

Chemistry
1 answer:
xeze [42]3 years ago
4 0

Answer:use a calculator

Explanation:

It helps

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Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 mL. The weight of the sample
Alenkinab [10]

Answer:

Density, d=6.38\ g/cm^3

Explanation:

It is given that, placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 mL.

It means that the volume of the sample is 12 mL

The weight of the sample is 76.6 g

We need to find the density of the sample.

12 mL = 12 cm³

The formula of density is given by :

d=\dfrac{m}{V}\\\\d=\dfrac{76.6\ g}{12\ cm^3}\\\\d=6.38\ g/cm^3

So, the density of the sample is 6.38\ g/cm^3.

3 0
3 years ago
Read 2 more answers
Why do hurricanes occur near the equator and not further North? Why do they
Leya [2.2K]

Answer:

the occur near the equator bc its- bc its warm and they get weak bc it slows them down

Explanation:

7 0
3 years ago
Give the correct nuclide symbol for gallium-71. How many protons and neutrons are in this isotope?
Alekssandra [29.7K]

Ga, 31 electrons/ protons, 39 neutrons

5 0
3 years ago
balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, w
kotegsom [21]

Answer:

The answer to your question is V2 = 3.7 L

Explanation:

Data

Volume 1 = 3.5 L

Temperature 1 = 25°C

Temperature 2 = 40°C

Pressure = cte.

Volume 2 = ?

Formula

To solve this problem use the Charles' law

             V1/T1 = V2/T2

- Solve for V2

             V2 = V1T2 / T1

- Convert temperature to °K

Temperature 1 = 25 + 273 = 298°K

Temperature 2 = 40 + 273 = 313°K

- Substitution

              V2 = (3.5)(313) / 298

- Simplification

              V2 = 1095.5 / 298

- Result

              V2 = 3.7 L

8 0
3 years ago
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Describe how nucleic acid basis pair up
castortr0y [4]

The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)

The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together.

7 0
3 years ago
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