General Chemistry Answers

Ethanol is to be burned. In the combustion equation, consider that the coefficient of ethanol is 2.

Coefficient of CO₂?

For every 1 mol glucose consumed, 2 mol of ethanol and 2 mol of CO2 are produced. Thus we have 10.02*2=20.04 mol of total CO2 produced from fermenting this 1.060 wort to 75% apparent attenuation. . Thus every mol of gas occupies 22.41 L or 0.791 cubic feet.

please elaborate

Calculate the pH value of phosphate buffer (pKa = 7.21) prepared by mixing of 1.0 mL of potassium hydrogen phosphate solution with 9.0 mL of potassium dihydrogen phosphate solution (molar concentrations of the phosphate buffer components are equal to each other). Determine the range of buffer action for the phosphate buffer. *

which solution could be used to percipitate tne barium ion in water sample: sodium chloride,sodium hydroxide,or sodium sulfate

Complete the equation of chemical reaction:

HBr + AgNO_{3 (excess)} =

Give a scheme of formed ionic micelle.

How many atoms are there in 0.8 moles of calciun? (Atomic mass Ca= 40.07g) with solution

How can i solve this i think i have to know the concentration of the acid H2CO3 but cannot figure it?

calculate the equillibrium constant ka1 for H2CO3 in an aqueous solution with 0,15 M NaCl and a tempreature of 20 celcius when the solution is saturated with CO2 with a partial pressure of 15 kpa and has a pH = 4,36?

Amylase was added to the test tube with starch solution, and placed in a thermostat at 37 ° C for 10 minutes. Then the contents of the tube were divided into two parts. Lugol's reagent was added to the first tube, and Fehling's reagent to the second after 10 minutes Lugol's reagent. What result can you get? Explain?

Can an e- be described by the following set of quantum numbers? If not, indicate which of the quantum numbers has a value that is not valid: n=2, ℓ =1, ml= -1, ms= +1/2

the green line in the atomic spectrum of thallium has a wavelength of 535 nm