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3 years ago

calculate how many g NaCl and how many g H2O are needed to prepare 250g of NaCl sodium chloride solutionwith mass ratio 0.9%

Chemistry

1 answer:

crimeas [40]3 years ago

3 0

Answer:

an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).

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A metal is found that has a mass of 27g and will displace 6mL of water. Calculate its density and identify the metal.

melisa1 [442]

The density of metal = 4.5 g/ml, and the metal = Titanium

<h3>Further explanation </h3>

Density is a quantity derived from the mass and volume

Density is the ratio of mass per unit volume

Density formula:

$\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}$

ρ = density

m = mass

v = volume

mass of metal=27 g

volume = 6 ml

The density :

$\tt \rho=\dfrac{27}{6}\\\\\rho=4.5~g/ml$

The metal with a density of 4.5 g/ml is Titanium

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3 years ago

Does anyone know what the formula would be for Rhenium V Biphosphate?

Georgia [21]

Answer:Re3(PO4)2 I think I'm wrong

Explanation:

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3 years ago

Opening a soda bottle illustrates how a decrease in pressure will___the amount of gas that can be dissolved in water.

strojnjashka [21]

C. Increase :)
I would choose C

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3 years ago

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Diano4ka-milaya [45]

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3 years ago

What is the molar mass of an element?

Vesnalui [34]

The answer is: the mass of 6.02 x 1023 representative particles of the element.

The base SI unit for molar mass is kg/mol, but chemist more use g/mol (gram per mole).

For example, molar mas of ammonia is 17.031 g/mol.

M(NH₃) = Ar(N) + 3 · Ar(H) · g/mol.

M(NH₃) = 14.007 + 3 · 1.008 · g/mol.

M(NH₃) = 17.031 g/mol.

The molar mass (M) is the mass of a given substance (in this example ammonia) divided by the amount of substance.

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3 years ago