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3 years ago

What did Democritus propose about the atom?

Chemistry

1 answer:

tensa zangetsu [6.8K]3 years ago

8 0

Idk but you good at math?

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You have 200 g of a substance with a molar mass of 150 g/mol. How many moles of the substance do you have? 0.75 mol 1.00 mol 1.3

tigry1 [53]

Answer:

Explanation:

200 g/150 g/mol = 1.33 mol

7 0

3 years ago

I need to know this because I was absent and he was going and could not help me with it so I am on my own

valkas [14]

Aw, I hope I can help.

1) C
(A meter stick is the only form of measurement that measures distance)

2) C
(other metric units all correspond with other forms of measurement)

3/4) I can’t measure the line physically from my phone but I think you’d be alright!

5) B
(a triple beam balance measures mass!)

6) B
(corresponds with triple beam balance)

7) A: 34.5g B: 104.3g C: 132.5g

8) C

9) A
(a graduated cylinder is the only form of measurement that measures volume)

10) A
(corresponds with a graduated cylinder!)

6 0

4 years ago

Read 2 more answers

a 150.0 ml sample of an aqueous solution at 25°c contains 20.0 mg of an unknown nonelectrolyte compound. if the solution has an

Nostrana [21]

The molar mass of the unknown compound is 223.2 g/mol.

Solution:

Molarity = $\frac{Weight}{molecularweight} * \frac{1000}{Volume (ml)}$

$4.54*10^{-4} = \frac{0.0152g}{molecularweight} * \frac{1000}{150.ml}$

Molecular weight = 223.2 g/mol

The main difference between the two is that molar mass refers to the mass of one mole of a particular substance. Molecular weight is the mass of a molecule of a particular substance. Although the definitions and units of molar mass and molecular weight are different, the values are the same.

The formula mass of a molecule is the sum of the atomic weights of the atoms in that molecular formula. The molecular weight of a molecule is the average mass calculated by adding the atomic weights of the atoms in the molecular formula. Molecular weight is the mass of a single molecule, specifically the mass of material required to make a single mole.

Learn more about Molecular weight here:-brainly.com/question/26388921

#SPJ4

3 0

2 years ago

you add 6.6g of iron to 29.00ml of water and notice that the voume of iron and water together is 29.84ml what is the density of

madreJ [45]

Explanation:

1L=1000mL

1dm³=1L

1dm³=1000cm³

29.84ml-29.00ml=0.84ml

Density=mass(g)/volume(cm³)

=6.6g/(0.84cm³)

7 0

3 years ago

How much does REAL carbon fiber cost ? lets say as big as a piece of paper

coldgirl [10]

Answer:

Today, the average total production cost of “standard modulus” carbon fiber is in the range of $7-9 per pound.

8 0

3 years ago