AlphaPrimes

If you have 14.2 mol of C4H10 and 85.6 mol of O2, which is the limiting reagent? I calculated mass using m=N*M, giving me the answer that C4H10 is the limiting reagent. That being said, the answer on the back says O2.

Gold-198 with a half life of 2.6 days is used to diagnose and treat liver disease. Write a half life decay equation that relates the mass of au-198 remaining to time in days. What percentage of a sample of Au-198 would reamin after 1 day, 1 week? Given th...

forty 2.0 kg blocks 20.0 cm thick are used to make a retaining wall in a backyard. Each row of the wall will contain 10 blocks. you may assume that the first block is the reference level. How much gravitational potential energy is stored in the wall when...

Triangle HAV has <H = 124, a=8.5mm, and h=7.2mm How many solutions are there? What I attempted: SinH/h=SinA/a Sin124/7.2=SinA/8.5 SinA=8.5(Sin124/7.2) <A = 78.2 RULE => All interior angles must add up to 180 degrees therefore this triangle has 0 solutions...

A student needs 0.14 mol of sodium sulphate to do an analysis. the concentration of the available solution is 2.6 m/L. What volume of the solution should the student measure out? What I've tried: C=N/V V=C/N V=2.6/0.14 V=18.6 The answer in the textbook sa...

85.0 mL of 1.50 mol/L ammonium chloride solution is added to 250 mL of water. Calculate the molar concentration of the final solution. Using the formula C(Concentration)=n(moles)/v(Volume measured in litres.) How am I supposed to solve this question given...

Bob got the following marks in each category for his math test. Knowledge: 15/15 Application 8/9 Thinking 5/7 Communication 3.5/4 Given that Knowledge is weighted as 35%, while the others are 15% what was his total mark? (Average)

1. A lab tech needs 1.00 L of 0.125 mol/L sulfuric acid solution for a quantitative analysis experiment. A commercial 5.00 mol/L sulfuric acid solution is available from a chemical supply company. Write out what steps he/she would follow to prepare the ne...

Simplify (1+tanx)^2 The answer is (1-sinx)(1+sinx) Here's what I do: 1 + 2tanx + tan^2x When I simplify it becomes 1 + 2(sinx/cosx) + (1+secx)(1-secx) What am I doing wrong?

Nevermind, I figured out what I did wrong.

Oh, that makes sense. Thanks!

Follow Bedmas to solve this question Brackets Exponents Division Multiplication Addition Subtraction 78 / 9 x 3 + (6 - 9) 78 / 9 x 3 + (-3) 8.6 x 3 + (-3) =23

Think of it like this... You have 480 students To calculate 3/4 of the population(75%), you do: (0.75)(480) which equals 360 students. Now, we take that number and multiply it by (1/5) That will give you the answer.

Figured it out.

Calculate the mass of solid cobalt(II) chloride hexahydrate you need to prepare 100.0 mL of a 0.100 mol/L cobalt(II) chloride solution.

This is just a right triangle... Use SOHCAHTOA to solve for each side and you can find the perimeter... Area of a triangle =b*h/2