4d

#### r the following combustion reaction CH₃CWhen a 7.52-g sample of butyric acid (molar mass = 88.10 g/mol) is burned, how much energy (in kJ) is released as heat?

For the following combustion reaction CH₃CH₂CH₂COOH(l) + 5O₂(g) → 4CO₂(g) + 4H₂O(g) ∆H = -2.18 × 10³ kJ When a 7.52-g sample of butyric acid (molar mass = 88.10 g/mol) is burned, how much energy...
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8d

#### Please help me with this question

Calculate the final temperature of the system: A 50.0 gram sample of water initially at 100 °C and a 100 gram sample initially at 22.4 °C are mixed. The specific heat of water is 4.184 J/gC)....
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#### Find the area and perimeter of the figure determined by the points. (−7, 2), (−3, 1), (−2, 5)

Find the area and perimeter of the figure determined by the points. (−7, 2), (−3, 1), (−2, 5).

12d

#### Tension in strings

Find the tension in each of the three cables supporting the traffic light if it weighs 300 N (hint: both T1Y and T2Y, the "y" components of T1 and T1, need to equal the weight of the traffic light;...
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12d

#### Non-uniform Circular motion

This object is rotating at non-uniform circular motion. Its centripetal acceleration is ac = 20 m/s2 and its tangential acceleration is at = 13 m/s2. What is the total acceleration?What is the...
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12d

#### SAT scores are distributed with a mean of 1,500 and a standard deviation of 300.

SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to...
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16d

#### Vectors in physics

Determine the resultant of two dispacement A and B where:A=(5i-2k)mB=(-3i+4j+6k)m

17d

#### According to the principle of superposition, displacement caused by combining two waves is equal to the

Larger wave
Sum of the contributing waves
Average of the contributing waves
Equilibrium position

18d

#### Can Crush by Air Pressure Experiment

If you put a can with water at its base over a hot plate and allow the water to heat. Once Steam is visible from the top of the can, and quickly flip the can upside down into a bowl of water with...
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18d

#### How to write polynomial equations based on the roots.

There are three questions.The first has the root 6-√7The second has the roots -2, 1+√7The third has the roots -6, 0, 3, -√5

19d

#### calculate the new pressure if a 2.45L of a gas at a pressure of 1.01 atm is contracted to a volume of 2.29L

Best to use Boyle's gas law

19d

#### Defining the Derivative and Using Derivative Notation

Find the tangent and normal line for the function: at x= -2. Then graph the function and the tangent line. Be sure to show all work and correct notation!!

21d

#### What is the probability that a randomly selected teacher makes less than $53,000 per year?

The average teachers' salary in a certain state is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. Assume that the sample is taken from a large...
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21d

#### If the bacteria in a culture double in 4 hours, how many hours will it take before 3 times the original number is present?

It will take ? hours. (Answer should be accurate to within at least three digits.)

22d

#### Working the Chain Rule

I am again trying to help my daughter with her college homework that is over my head. Any help for the following problem is appreciated. Find the equation of the tangent line to the graph of...
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26d

#### Probability dice roll

A fair 6-sided die is rolled three times. What is the probability that all three rolls are 1? Write your answer as a fraction or a decimal, rounded to four decimal places.

#### What is the reaction of Fe metal with ferric chloride?

What is the reaction of Fe metal with ferric chloride?

#### Math problem, help pls!

Suppose you want to have $300,000 for retirement in 35 years. Your account earns 4% interest. How much would you need to deposit in the account each month?

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