The four metals of M, N, X and Y are separately added to hydrochloric acid Reactions only take place in X and Y to produce gas bubbles. When Yis
put into the nitrate solution of X, element X is precipitated out. The relative
atomic mass of N is greater than that of M. When M is put into the nitrate
solution of N, the mass of the solution decreases. The reactivity series for
these four metals is
A. Y> X > M >N
B. Y>X>N>M
C. N>M> X>Y
D. X >Y > M>N​

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)