Hen 20 g of Al (s) at 98 degrees Celsius is placed in 50 g of H2O , the final temperature is 26.5 degrees Celcius. What was the initial temperature of H2O ? Given: CspAl(s) = 0.903 J/g C and CspH20(l) = 4.18 J/g C

It decreases by 4 is your answer mark brainliest 

Answer(d) unstable compounds that convert to acetals in the presence of alcohol and an acid; (b) semiacetals produced by alcohol subtraction from ketone;

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  d.landing on and exploring the moon4. which of these space missions involved the deployment of lunar rovers d.apollo5. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar systemb.safir7.which technology limit the future of space exploration b. scientist must first develop certain technologies before missions can be completed.

The answer is b electromagnetic i believe, i hope i ya out!