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2 years ago

Please help asap,

1 answer:

5 0

10. Capital C and D represent products of chemical reaction, the capital A and B represent reactants, the lower case letter represent coefficients (how many atoms or molecules in chemical reaction).
12. According to Le Chatelier's principle (if the concentration is changed, that will shift the equilibrium to the side that would reduce that change in concentration) the equilibrium shift to the left.
13. According to Le Chatelier's principle the equilibrium shift to the right.
14. According to Le Chatelier's principle (When the reaction is exothermic, heat is included as a product) the equilibrium shift to the right.

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44.8% of a 250. mL acid solution is used in an experiment, what volume of acid (in mL) was used?

postnew [5]

Answer:

112 mL

Explanation:

The formula for percent by volume is

$\text{Percent by volume} = \dfrac{\text{Volume of solute}}{\text{Volume of solution}}\times 100 \, \%$

If you have 250 mL of a solution that is 44.8 % v/v,

$\begin{array}{rcl}44.8\, \% & = & \dfrac{\text{Volume of solute}}{\text{250 mL}}\times 100 \, \%\\\\44.8 \times \text{ 250 mL} & = & \text{Volume of solute} \times 100\\\text{Volume of solute} & = & \dfrac{44.8 \times 250\text{ mL}}{100}\\\\ & = & \textbf{112 mL}\\\end{array}$

7 0

2 years ago

A solution of ammonia has a pH of 11.8. What is the concentration of OH– ions in the solution?

melomori [17]

[OH-]: 0.0063095734448

7 0

3 years ago

Read 2 more answers

Single and double replacement reactions practice WS CuCl2 + F2 » CuF2 + Cl2

Lapatulllka [165]

CuCl2+F2—>CuF2+Cl2.
This is a single replacement because there is one compound and one element. Picture Cu as ‘A’ Cl2 as ‘B’ and F2 as ‘C.’ So AB+C—>AC+B. A and B “broke up” and that resulted to A going with C to create the compound CuF2 leaving Cl2 alone.

7 0

2 years ago

Your lab partner named this compound 3-methyl-4-n-propylhexane, but that is not correct.

loris [4]

Answer: The correct IUPAC name of the alkane is 4-ethyl-3-methylheptane

Explanation:

The IUPAC nomenclature of alkanes are given as follows:

Select the longest possible carbon chain.
For the number of carbon atom, we add prefix as 'meth' for 1, 'eth' for 2, 'prop' for 3, 'but' for 4, 'pent' for 5, 'hex' for 6, 'sept' for 7, 'oct' for 8, 'nona' for 9 and 'deca' for 10.
A suffix '-ane' is added at the end of the name.
If two of more similar alkyl groups are present, then the words 'di', 'tri' 'tetra' and so on are used to specify the number of times these alkyl groups appear in the chain.

We are given:

An alkane having chemical name as 3-methyl-4-n-propylhexane. This will not be the correct name of the alkane because the longest possible carbon chain has 7 Carbon atoms, not 6 carbon atoms

The image of the given alkane is shown in the image below.

Hence, the correct IUPAC name of the alkane is 4-ethyl-3-methylheptane

4 0

2 years ago

How long did it take for a car to travel 20 meters with a speed of 10m/s

AfilCa [17]

Answer:

2 second

Explanation:

yes

6 0

2 years ago