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Alja [10]
2 years ago
12

If 2 mL of a liquid weighs 4 g, what is its density?

Chemistry
1 answer:
Ivanshal [37]2 years ago
8 0

Answer: 2g/ml.

Explanation: um hm.

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Find the mass of one atom of uranium-235. Recall that the mass in atomic mass units is equal to the mass in grams of one mole of
stiv31 [10]

Answer:

3.90*10^{-25}kg/atom

Explanation:

The molar mass of uranium-235 is 235 g/mol. So one mole of uranium-235 has a mass of 235 g. Put differently 6.022×10^23 atoms of uranium-235 have a mass of 235 g. Knowing that, how can we use that to find the mass of one atom?

mass of one atom = \frac{235 g}{1mol} *\frac{1 mol}{6.022*10^{23}atoms } *\frac{1kg}{1000g}= 3.90*10^{-25}kg/atom

7 0
3 years ago
How many molecules in 9.18 moles of C11H12O22
Setler [38]

Answer:

55.3 × 10²³ molecules

Explanation:

Given data:

Number of moles of C₁₁H₁₂O₂₂ = 9.18 mol

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

For given data:

9.18 mol × 6.022 × 10²³ molecules /1 mol

55.3 × 10²³ molecules

5 0
3 years ago
Why do the leaves outside change colors?
Allushta [10]

Answer:

because the amount of pigments change as thee leaves prepare to fall from the trees

7 0
3 years ago
Fill in the blanks:
Misha Larkins [42]

Answer:

1. smaller. 2. smaller. 3. greater

Explanation:

1. H−O−H angle is 104.45  and H−C−H angle is 109.5

2. O−S−O angle is 119 and F−B−F angle is 120

3. The F−S−F bond angle in SF₆ is 90 and F−Br−F bond angle in BrF₅ is 84.8

8 0
3 years ago
This quiz gonna kill me <br> please help
Sauron [17]

Explanation:

cro ro rvdhfrodj jhpjbcdhjcjcdosjd

7 0
3 years ago
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