If 65.5 ml of HCl stock solution is used to make 450 ml of a 0.675 M HCl dilution, what is the molarity of the stock solution?

Three isotopes of silicon have mass numbers of 28,29, and 30 with an average atomic mass of 28.086 what does this say about the relative abundances of the isotopes

How many moles of glucose, C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available?

Which characteristic is common to all three groups of mammals? They require little or no parental care. They develop partially or fully inside the mother's body. They have long gestation periods. They are always endotherms.

After doing an experiment, a chemist determines the Rf value of a compound to be 4. He also notes that the solvent travelled 4 cm on the plate. What can you conclude about this experiment

What is the mass (in grams) of 9.07 * 1024 molecules of methanol (CH3OH) ?

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What is the Element hydrogen made from

Part a ammonia can be produced via the chemical reaction n2 (g) + 3h2 (g) ⇌2nh3 (g) during the production process, the production engineer determines the reaction quotient to be q = 3.56*10-4. if k = 6.

In what respect does an atom of magnesium differ from a magnesium ion (Mg^{2+}) ? (A) The ion has a more stable electronic arrangement than the atom.

What is the approximate percent change in protein for soybeans