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2 years ago

Select all that apply.

1 answer:

3 0

Answer is:increase [Cl₂] and remove HCl from the product.
Chemical reaction: Cl₂ + CH₂Cl₂ → CHCl₃(chloroform) + HCl.
According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change, the position of equilibrium will move so that the concentration of reactants decrease (Cl₂) and concentration of products of chemical reaction increase (CHCl₃) if increase concentration of reactants and decrease concentration of products.

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Calculate the density mass= 54.2 volume= 78.1

Helen [10]

Answer:

0.693 (you can round it up if you want to)

Explanation:

Density= mass ÷ volume

54.2 ÷ 78.1 = 0.693

I hope this helped☺

6 0

2 years ago

How many milliliters of a 0.211 M HI solution are needed to reduce 24.0 mL of a 0.354 M KMnO4 solution according to the followin

Novay_Z [31]

Answer:

The answer to your question is 242 ml

Explanation:

Data

HI 0.211 M Volume = x

KMnO₄ 0.354 M Volume = 24 ml

Balanced Chemical reaction

12HI + 2KMnO₄ + 2H₂SO₄ → 6I₂ + Mn₂SO₄ + K₂SO₄ + 8H₂O

Process

1.- Calculate the moles of KMnO₄ 0.354 M in 24 ml

Molarity = moles / volume (L)

moles = Molarity x volume (L)

moles = 0.354 x 0.024

moles = 0.0085

2.- From the balanced chemical reaction we know that HI and KMnO₄ react in the proportion 12 to 2. Then,

12 moles of HI --------------- 2 moles of KMnO₄

x --------------- 0.0085 moles of KMnO₄

x = (0.0085 x 12)/2

x = 0.051 moles of HI

3.- Calculate the milliliters of HI 0.211 M

Molarity = moles/volume

Volume = moles/molarity

Volume = 0.051/0.211

Volume = 0.242 L or Volume = 242 ml

8 0

3 years ago

Which statements are true about reversible reactions?

umka21 [38]

Answer:

Reversible reactions exhibit the same reaction rate for forward and reverse reactions at equilibrium.

Reversible reactions exhibit constant concentrations of reactants and products at equilibrium

Explanation:

A reversible reaction is a reaction that can proceed in both forward and backward direction.

Equilibrium is attained in a chemical system when there is no observable change in the properties of the system.

At equilibrium, a reversible reaction is occurring in at same rate. That is, the forward and backward reaction is occurring at the same rate. As the rate of the forward and backward reaction remains the same, the concentrations of the reactants and products will also be the same in order for the equilibrium to be maintained.

5 0

3 years ago

Read 2 more answers

The half-life of radon-222 is 3.8 days. If a sample currently contains 3.1 grams of radon-222, how much radon-222 did this sampl

vodka [1.7K]

The number of grams of radon 222 did it have 15.2 ago was 49.6 grams( answer C)

calculation

calculate the number of half life it has covered from 15.2 days to 3.8 days

that is divide 15.2/ 3.8 = 4 half life

half life is time taken for a radio activity of a specified isotope to fall to half its original mass

therefore 3.8 days ago it was 3.1 x2 = 6.2 grams

7.6 days ago it was 6.2 x2 = 12.4 grams

11.4 days ago it was 12.4 x2= 24.8 grams

15.2 days ago it was 24.8 x2=49.6 grams

5 0

3 years ago

PLEASE HELPP Tell me everything you know about "balancing the equation" for science

Free_Kalibri [48]

Watch melissa maribel explains it amazingly on her yt channel

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3 years ago