Which substance reacts with an acid to form hydrogen gas?

If a motionless object has a weight of 25 N, what is true of the normal force acting on the object? A. It is 25 N and acts in the same direction as the weight. B. It is 25 N and acts in the opposite direction to the weight. C.

The reaction below shows how silver chloride can be synthesized. AgNO3 + NaCl Right arrow. NaNO3 + AgCl How many moles of silver chloride are produced from 15.0 mol of silver nitrate? 1.0 mol 15.0 mol 30.0 mol 45.0 mol

A three-carbon alkene contains two double bonds. Predict its molecular formula? A. C3H4 B. C3H5 C. C3H6

The table compares wildlife supported by two plants growing around a lakeside ecosystem in South Florida.

A microspectrophotometer measures which of the following? Electrons Electricity Light absorption Pigments

Which set of factors changes igneous or sedimentary rock into metamorphic rock? heat and weathering water and weathering heat and pressure water and pressure

What is the standard cell potential (E°cell) for the voltaic cell based on the reaction below? Sn2 + (aq) + 2Fe3 + (aq) → 2Fe2 + (aq) + Sn4 + (aq)

G oil of wintergreen, c8h8o3 is prepared when methanol, ch3oh, is reacted with salicylic acid, c7h6o3. what is the percent yield of a reaction in which 15.3 g of oil of wintergreen is collected after 16.

How can a neutral atom become a positively-charged particle?

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.