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2 years ago

Help I have no idea what I'm doing!!

Chemistry

2 answers:

harkovskaia [24]2 years ago

3 0

You have to solve it and color in the numbers i guess? It doesnt show all of the work

lyudmila [28]2 years ago

3 0

1. 605.952 g
2.
3.1.36 molecules
4.0.29 mols
5.0.955 mols
6.5.336 molecules

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The by-product of the chlorination of an alkane is

Elanso [62]

The by-product of the chlorination of an alkane is HCl

Explanation:

Chlorination is the process of adding chlorine to drinking water to disinfect it and kill germs. Different processes can be used to achieve safe levels of chlorine in drinking water.
Chlorination of alkane gives a mixture of different products.
When consider mechanism of alkanes chlorination, free radicals are formed during the reaction to keep the continuous reaction.
Different alkyl chloride compounds, extended carbon chains compounds and HCl are formed as products in product mixture.
Chlorination byproducts, their toxicodynamics and removal from drinking water.
Halogenated trihalomethanes (THMs) and haloacetic acids (HAAs) are two major classes of disinfection byproducts (DBPs) commonly found in waters disinfected with chlorine
Chlorine is available as compressed elemental gas, sodium hypochlorite solution (NaOCl) or solid calcium hypochlorite (Ca(OCl)2

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2 years ago

Subway Surfer number 3 it says the color of a substance is an example of a(n) ___ (in science) pick these choices on the image.

RideAnS [48]

C is your answer. Because if you add two of them together you get a compound.

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2 years ago

A chemist must prepare 300.0mL of nitric acid solution with a pH of 0.70 at 25°C. He will do this in three steps: Fill a 300.0mL

d1i1m1o1n [39]

Answer: The volume of concentrated solution required is 9.95 mL

Explanation:

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

pH = 0.70

Putting values in above equation, we get:

$0.70=-\log[H^+]$

$[H^+]=10^{-0.70}=0.199M$

1 mole of nitric acid produces 1 mole of hydrogen ions and 1 mole of nitrate ions.

Molarity of nitric acid = 0.199 M

To calculate the volume of the concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated nitric acid solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted nitric acid solution

We are given:

$M_1=7.0M\\V_1=?mL\\M_2=0.199M\\V_2=350mL$

Putting values in above equation, we get:

$7.0\times V_1=0.199\times 350.0\\\\V_1=\frac{0.199\times 350}{7.0}=9.95mL$

Hence, the volume of concentrated solution required is 9.95 mL

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2 years ago

Which statement best describes what happens during a chemical change?

shutvik [7]

I think the best answer that will describe chemical change is the first option. During a chemical change, both the identity and the properties of a substance change because new substances are being formed by a chemical reaction. An example is rusting of steel

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a_sh-v [17]

42- 8 = 34 sand dunes must be the answer

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2 years ago