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3 years ago

What mass of NH4NO3 would you need to make 250.0mL of a 0.78M solution?

Chemistry

2 answers:

katrin [286]3 years ago

8 0

Answer:

Explanation:

Pie3 years ago

4 0

The answer would be A.)
Hope this helps

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A chemist combines ethane and chlorine with the goal of producing chloroethane which other product could be reasonably expected

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<span>So when the chemist combines Ethane (CH3CH3) and Chlorine (Cl2) with the intention of producing Chloroethane (CH3CH2Cl), the other product that's formed in this reaction is 1,2-dichloroethane (ClCH2CH2Cl) also called as Ethylene dichloride with molecular weight of 98.954 g/mol. This is a colorless oily flammable substance that weighs heaver when vaporized.</span>

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3 years ago

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Transferring or sharing electrons between atoms forms

Brums [2.3K]

Transferring or sharing electrons between atoms forms a covalent bond.<span> Covalent bonding is when atoms share electrons. It is a chemical bond that involves the sharing of electron pairs. These pairs are called bonding pairs. Examples of compounds that has covalent bonds are CO2, organic compounds, lipids and proteins.</span>

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3 years ago

What mass of helium is in a 2.00 L balloon at STP? pls help me lol

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2 years ago

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3

Lelu [443]

Answer: 120g/mol

Explanation:

The first step we are to take is to calculate the freezing point depression of the solution.

ΔT(f) = freezing point of pure solvent - freezing point of solution

ΔT(f) = 5.48 - 3.77

ΔT(f) = 1.71°C

Next we are to calculate the molal concentration of the solution using freezing point depression

ΔT(f) = K(f) * m

m = ΔT(f)/K(f)

m = 1.71/5.12

m = 0.333 molal

Now, we calculate the molecular weight of the unknown...

m = 0.333 mol = 0.333 mol X per kg of benzene

moles of X = 0.333 mol of X per kg of benzene * 0.5kg of benzene

moles of X = 0.1665

molecular weight of X = 20g of X/0.1665

molecular weight of X = 120/mol

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3 years ago

You burn a log on a fire. You use fire to warm yourself and help you see to read a book. What energy transformation is taking pl

Vinvika [58]

Answer:

heat energy to keep you warm and light energy to be able to read your book

Explanation:

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2 years ago