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zalisa [80]
3 years ago
4

Which describes a value for density?

Chemistry
2 answers:
mash [69]3 years ago
7 0

Answer:

This question is incomplete. The completed question is below

Which describes a value for density?

(a) a value for volume, such as m³, divided by a value for mass, such as kg

(b) a value for mass, such as kg, divided by a value for volume, such as m³

(c) a value for distance, such as m, divided by a value for time, such as s

(d) a value for time, such as s, divided by a value for distance, such as m

The correct option here is (b)

Explanation:

The formula to be considered here is that of density

Density = Mass/volume

The unit for density can either be grams per cubic centimeter (g/cm³) or kilogram per cubic meter (kg/m³).

Hence, when the unit of density is kg/m³, the mass will have a unit of kilogram (kg) while the volume will have a unit of m³. Here, the mass in kg divided by a volume in m³ is the formula for density in kg/m³.

However, when the unit of density is g/cm³, the mass will have a unit of grams (g) while the volume will have a unit of cubic centimeter (cm³). Here, the mass in g divided by a volume in cm³ is the formula for density.

Sedaia [141]3 years ago
6 0
Mass
volume
mass divided by volume
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4 years ago
What is the molarity of a solution that contains 122g of MgSO4 n 3.5L of solution?​
Semmy [17]

Answer:

0.29mol/L or 0.29moldm⁻³

Explanation:

Given parameters:

Mass of MgSO₄ = 122g

Volume of solution = 3.5L

Molarity is simply the concentration of substances in a solution.

Molarity = number of moles/ Volume

>>>>To calculate the Molarity of MgSO₄ we find the number of moles using the mass of MgSO₄ given.

Number of moles = mass/ molar mass

Molar mass of MgSO₄:

Atomic masses: Mg = 24g

S = 32g

O = 16g

Molar mass of MgSO₄ = [24 + 32 + (16x4)]g/mol

= (24 + 32 + 64)g/mol

= 120g/mol

Number of moles = 122/120 = 1.02mol

>>>> From the given number of moles we can evaluate the Molarity using this equation:

Molarity = number of moles/ Volume

Molarity of MgSO₄ = 1.02mol/3.5L

= 0.29mol/L

IL = 1dm³

The Molarity of MgSO₄ = 0.29moldm⁻³

8 0
3 years ago
Sulfur trioxide is a gas that reacts with liquid water to produce aqueous sulfuric Acid or acid rain what is the equation for th
bearhunter [10]

Answer:

SO₃(g) + H₂O(l) → H₂SO₄(aq)

Explanation:

The<em> molecular formula for the involved species</em> are:

  • Sulfur trioxide = SO₃. ("trioxide" indicates the presence of 3 oxygen atoms).
  • Water = H₂O
  • Sulfuric acid = H₂SO₄

With the above information in mind we can proceed to write the reaction equation:

  • SO₃(g) + H₂O(l) → H₂SO₄(aq)
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3 years ago
How many electrons does nitrogen (N) need to gain to have a stable outer electron shell
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It need "3 electrons" to have a stable electronic configuration. 

'cause it has 5 electrons in it's outer shell & every atom needs 8 electrons. So, it requires 3 more!

Hope this helps!
7 0
3 years ago
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Carbonated drinks in cans have a small amount of space above the liquid level inside the can known as the "headspace." What woul
Marianna [84]

Answer:

Carbonated drinks in cans have a headspace to avoid explosion

Explanation:

  • When we see in carbonated drinks in cans we can see there is a small amount of space above the liquid level known as the headspace. This space is not a wasted space. The gas filled in the can is compressed highly which when opened comes out with a high pressure with an explosion.
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