Q and A for the topic: General

Given a pKa of 4.76 for CH3COOH, what is the pH of a solution prepared by mixing exactly 15.0 mL of 0.400 M CH3COOH with 10.0 mL of 0.400 M KOH?

A solution that is 0.25 M in HN3 is also 0.55 M in NaN3. Given a pKa of 4.60 for HN3, what is the pH of this solution?

A population of values has a normal distribution with μ=186.8 and σ=70.5. A random sample of size n=121 is drawn. What is the mean of the distribution of sample means?

A mail gardening equipment business shipped 119 packages in one day. Customers are charged 4.50 for each standard delivery package and $9.00 for each express delivery package. Total shipping charges for the day were $720. How many of each package were shipped. There were _ standard delivery packages and_ express delivery packages shipped

I am earning $5 000 a month. I borrow $250 000 from a commercial bank. I was told to pay monthly interest of 4% over three years time. The interest is based on the principle. A: How much will I repay the loan in total over the 3 years time? B: How much will be the loan repayment on the first month, second month, third month and forth month?

A model NASCAR race car lists for $80.06 with a trade discount of 40%. What is the net price

Calculate the number of BTU's required to change 645 lbs of ice at 25 degrees to 645 lbs of steam at 295 degrees

What is the solution set of the inequality |x+ 2|−|x−3| ≤ 1?

H. Propose a synthesis method to show how you will prepare or make an aldehyde starting from an ester.

From a lighthouse 15 meters above sea level, a shipwreck can be seen on the sea surface 100 meters away at the foot of the lighthouse. What is the angle of depression from the top of the lighthouse to the wreck?

A kite is flying at a height of 25 meters, the length of the string that holds the kite is 50 meters. What is the angle of inclination of the comet with respect to the horizontal ground?

Calculate the pressure in kPa, produced by a piston that applies a force of 12 kN, in the oil contained in a closed cylinder. Plunger diameter It is 75mm.

A zero-coupon bond is a security that pays no interest, and is therefore bought at a substantial discount from its face value. If the interest rate is 12% with annual compounding how much would you pay today for a zero-coupon bond with a face value of $1,600 that matures in 11 years? Please round your answer to the nearest hundredth.

They want to illuminate the squares of the Santiago Centro commune, for this, one known spotlight is installed. The supplier assures that the life time of the bulbs is approximately normal with a mean of 1200 hours and a standard deviation of 150 hours. Choosing one of the bulbs at random, what is the probability that it will shine for at least 980 hours?

a boy is in a swimming pool with index n2=v2. Knowing that the smallest index is 2, find the limiting angle of refraction

I. Mrs. Luisa asks for a quote to repair eight pieces of jewelry. The jewelry store manager tells him that he will charge $6 for the first piece of jewelry, and for each successive piece three times as much as the previous one. How much will the jeweler charge Mrs. Luisa?

2x²+5x+2=0

A zero-coupon bond is a security that pays no interest, and is therefore bought at a substantial discount from its face value. If the interest rate is 6% with annual compounding how much would you pay today for a zero-coupon bond with a face value of $800 that matures in 10 years? Please round your answer to the nearest hundredth.

Mr. Jiménez requested a personal loan from Banca Progreso for $85,000. The credit was will pay in 36 biweekly installments of $2,782.79. Calculate the annual nominal interest rate that Mr. Jiménez pays for the credit

A population has a mean u=134 and a standard deviation o=22. Find the mean and standard deviation of the sampling distribution of sample means with sample size n=42