CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2 (g) How many grams of calcium chloride will be produced when 31g of calcium carbonate are combined with 11 g of HCl? I have 0.3097 moles of CaCO3 and 0.30169 moles of HCl...I get stuck at that point
calculate the wavelength in nm of the spectral line produced when an electron in an hydrogen atom undergoes the transition from n=3 to n=2. I get 6.56x10^-7 meters and 6,561.68 nm but that is not the right answer...help please!
Physical Science Need Help Please!
A light beam has a frequency of 5 x 1015 Hz. What is its wavelength?
life is full of choices, so i must learn to make good ones.life is a noun choices which other one
Another term that means the same thing as "insurance company" is:
What is the amount of water needed to obtain a saturated solution using 27g of barium nitrate? What mass of water is present
A picture frame measure 5 inches wide and 7 inches long . What is the perimeter of the frame ? (16-3)
How can the number 39 be divided into two parts in order that the sum of 2/3 of one part and 3/4 of the other part is 28? Explain your workings