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vichka [17]
3 years ago
13

Question 3 of 10

SAT
2 answers:
jok3333 [9.3K]3 years ago
8 0
Answer: D


explanation: makes sense
FinnZ [79.3K]3 years ago
3 0
Answer is D
It’s The right one
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Raymond bought a car for $40, 000. He took a $20,000 loan from a bank at an interest rate of 15% per year for a 3-year period. W
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Answer:

20000*(1+15%)³=30417.5

Explanation:

The number $40000 is irrelevant. Don't be disturbed!

This is a typical compound interest question. Use the compound interest formula: S=p(1+<em>i)ⁿ</em>

S for sum, p for principal balance, <em>i </em>for interest rate, n for the number of years or times

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Which statement best describes how Wells conveys his purpose with this excerpt? He creates powerful visual images. He appeals to
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A 20.0-ml sample of a 0.200 mhbr solution is titrated with a 0.200 mnaoh solution. calculate the ph of the solution after the fo
kumpel [21]

The calculated pH of the solutions are given below:

  • The pH of the solution after 14.0 ml of base is added to it is calculated as 1.45.
  • The pH of the solution after 19.8 ml of base is added to it is calculated as 3.0
  • The pH of the solution after 20.0 ml of base is added to it is calculated as 7.

<h3>What is pH?</h3>

This is the level of acidity or alkalinity of an aqueous solution. The pH of a substances tells if its an acid, base or neutral.

HBr and NaOH while in water would dissociate and they would become H+ and OH- respectively.

Mol of HBr = Mol * Vol

= 0.200 * 20mL

= 4 mmol

A. Moles of NaOH added

= 0.2 X 14

= 2.8 mmol

Moles of H+ that did not react

= 4 - 2.8

= 1.2 mmol

1.2/1000 = 0.0012 moles

Total volume = 20 + 14

= 34 mL to litres

= 0.034 L

Molarity of H+ = 0.0012 / 0.034L

= 0.035 M

-log[0.035] = 1.45

The pH of the solution is  1.45

B. NaOH added = 19.8 * 0.2 =

3.96 mmoles

The unreacted solution

= 4.0 - 3.96

= 0.04 mmol

0.04/1000 = 0.00004 moles

Total volume = 20 + 19.8

= 39.8mL

Converted to litres = 0.0398L

Molarity  = 0.00004 / 0.0398L

= 0.001

-log(0.001) = 3.0

The ph Is therefore 3.0

C. Moles of NaOH added = 0.2*20mL = 4mmol

All the H+ are going to be consumed here. This would result into a neutral solution pH = 7

<u>Complete question:</u>

20.0 mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the PH of the solution after the following volumes of base have been added.

A. 14.0 mL

B. 19.8 mL

C. 20.0 mL

Read more on pH here; brainly.com/question/22390063

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2 years ago
Read an excerpt from the nobel lecture by al gore: now science is warning us that if we do not quickly reduce the global warming
Crank

The theme of the given speech is the warning for the care of the natural resources as it turn into disaster.

<h3>What is a theme?</h3>

A theme is given as the message that has been delivered with the talk, play or the speech or any other art or literature practice.

The excerpt given is comprising the speech related to the environmental issues and the warning about the proper care to be taken. It is mentioned that the resources may turn in the disaster. Thus, the theme of the excerpt is given as to take care of natural resource to stop the disaster.

Learn more about theme, here:

brainly.com/question/11108997

#SPJ1

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Please help!<br> What is a personal quality?
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Answer:

B. an ability u learn over time

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