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3 years ago

Which statement about exothermic reactions is accurate

Chemistry

2 answers:

Monica [59]3 years ago

7 0

where’s the options?

mart [117]3 years ago

5 0

Answer:

A As reactants form products, the potential energy decreases.

Explanation:

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Which is the formula for iodine tribromide? IBr IB3 IBr3 I3Br

azamat

Answer: ( C ) IBr3

Explanation: Iodine tribromide formula is IBr3

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6 0

3 years ago

Read 2 more answers

A 10.0-gram sample of which element has the smallest volume at STP?

DaniilM [7]

(4) zinc

Explanation:

Given parameters:

Mass of the sample = 10g

Condition = STP

Unknown:

Element with the least volume = ?

Solution:

The number of moles of substance as STP can be derived using the equation below;

Volume of substance = number of moles x 22.4

Number of moles = $\frac{mass}{molar mass}$

since mass = 10g

Number of moles of Al = $\frac{10}{27}$ = 0.37mole

Number of moles of Ti = $\frac{10}{47.9}$ = 0.29mole

number of moles of Mg = $\frac{10}{24}$ = 0.47mole

Number of moles of Zn = $\frac{10}{65.5}$ = 0.15mole

Zinc has the least number moles and it will have the lowest volume at STP because the volume directly proportional to number of moles.

learn more:

Number of moles brainly.com/question/1841136

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6 0

4 years ago

Is the group number the number of electrons on the outermost shell

vagabundo [1.1K]

In the column have the same electrons on the outer shell. Which the outer shell electrons are call valence electrons.

6 0

3 years ago

George is writing a newspaper article about the fire at the local library. His introductory paragraph has an example of conserva

Lina20 [59]

Answer:

Explanation:

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3 years ago

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1. Calculate the molarity of a sugar solution if 4 liters of the solution contains 8 moles of sugar

klio [65]

Answer:

The molarity of a sugar solution is 2 M.

Explanation:

Molarity is a concentration measure that expresses the moles of solute per liter of solution. In this case it is calculated with the simple rule of three:

4 L of solution--------8 moles of sugar

1 L of solution ------x= (1 L of solution x 8 moles of sugar)/4 L of solution

x=2 moles of sugar---> The solution is 2M

8 0

3 years ago