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3 years ago

What is the Density of 85 mL of a liquid that has a mass of 54 Kg?

Chemistry

1 answer:

Korolek [52]3 years ago

3 0

Answer:

The answer to your question is density = 635.3 g/ml (check the units)

Explanation:

Data

density = ?

volume = 85 ml

mass = 54 kg

Density is a physical property that relates the mass of an object and its volume.

The unit of this property are g/ml or kg/m³

In this problem, I will calculate the density in g/ml

Formula

density = mass/ volume

-Substitution

density = 54000 / 85

-Simplification

density = 635.3 g/ml

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Can someone pls help me with this pls

Slav-nsk [51]

Answer:

I would say element

Explanation:

because it is made of two different types of atoms chemically bonded together!

I'm sorry if wrong!

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3 years ago

Which of the following is a pure substance: sugar, salt water, or pepper? Explain how you know.

QveST [7]

Water is a pure substance because it is not refined like the other materials. Hope this helps!!!

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3 years ago

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Classify these bonds as ionic, polar covalent, or nonpolar covalent. You are currently in a sorting module.

Makovka662 [10]

Answer:

C-O: polar covalent

Mg-F: ionic

Cl-Cl: nonpolar covalent

Explanation:

Ionic bonds are formed between an atom of a metallic element and another atom of a non-metallic element. Thus, Mg-F is an ionic bond, in which Mg is the metal and F is the nonmetal.

Covalent bonds are formed between two non-metallic elements. So, C-O and Cl-Cl are covalent bonds, because C, O, and Cl are nonmetals.

In C-O, the atom of oxygen (O) has more electronegativity than the atom of carbon (C). Thus, O will attract the electrons with more strength and a difference in charge will be established between the two bonded atoms. So, this covalent bond is polar.

In Cl-Cl, both atoms have the same electronegativity because they are from the same chemical element (Cl). Thus, this bond is nonpolar.

7 0

3 years ago

In the background information, it was stated that CaF2 has solubility, at room temperature, of 0.00160 g per 100 g of water. How

____ [38]

Answer:

2.05*10⁻⁵ moles of CF₂ can dissolve in 100 g of water.

12.82 moles of CaF₂ will dissolve in exactly 1.00 L of solution

Explanation:

First, by definition of solubility, in 100 g of water there are 0.0016 g of CaF₂. So, to know how many moles are 0.0016 g, you must know the molar mass of the compound. For that you know:

Ca: 40 g/mole
F: 19 g/mole

So the molar mass of CaF₂ is:

CaF₂= 40 g/mole + 2*19 g/mole= 78 g/mole

Now you can apply the following rule of three: if there are 78 grams of CaF₂ in 1 mole, in 0.0016 grams of the compound how many moles are there?

$moles=\frac{0.0016 grams*1 mole}{78 grams}$

moles=2.05*10⁻⁵

2.05*10⁻⁵ moles of CF₂ can dissolve in 100 g of water.

Now, to answer the following question, you can apply the following rule of three: if by definition of density in 1 mL there is 1 g of CaF₂, in 1000 mL (where 1L = 1000mL) how much mass of the compound is there?

$mass of CaF_{2}=\frac{1000 mL*1g}{1mL}$

mass of CaF₂= 1000 g

Now you can apply the following rule of three: if there are 78 grams of CaF₂ in 1 mole, in 1000 grams of the compound how many moles are there?

$moles=\frac{1000 grams*1 mole}{78 grams}$

moles=12.82

12.82 moles of CaF₂ will dissolve in exactly 1.00 L of solution

5 0

3 years ago

C. 49.8 grams of ki is dissolved in enough water to make 1.00 l of solution. what is the molarity?

taurus [48]

Hey There!:

Molar Mass KI => 166.003 g/mol

* number of moles:

n = mass of solute / molar mass

n = 49.8 / 166.003

n = 0.3 moles KI

Therefore:

M = n / V

M = 0.3 / 1.00

M = 0.3 mol/L

hope this helps!

7 0

3 years ago

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