What mass of water is decomposed by electrolysis (yield of hydrogen in electrolysis reaction is only Y1 = 77.9%), if it is known that all produced hydrogen was used to make 269 g of hydrogen chloride, and the yield of HCl in the production reaction is Y2 = 63%? Oxygen and chlorine are in excess. Balanced chemical equations of the reactions are:

2H2O → 2H2 + O2 Y1% yield
H2 + Cl2 → 2HCl Y2% yield

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

the answer your looking for is c).

the correct answer is c