A ball rolls along a smooth horizontal floor at 10 m/s, then starts up a 20 degree ramp. How high does it go before rolling back?

A 50 g piece of aluminum is heated to 800c and then dropped into cold water, where the metal's temperature drops to 300c. how many calories does it lose to water? (specific heat capacity of aluminum is. 21 cal/g0c)

Which of these is a mixture? A) salt water B) calcium C) Potassium D) carbon dioxide

What is the appearance of the signal corresponding to the CH₂ protons in the 1H NMR spectrum of ethyl methyl ether, CH₃CH₂OCH₃? A. a doublet B. a triplet C. a quartet D. a septet

The mass of a triton is: greater than the sum of its components' masses equal to the sum of its components' masses less than the sum of its components' masses independent of the sum of its components' masses

Which of the elements of the periodic table has the lowest valency number

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

Good evening everyone, I just wanted to know who's willing to talk to me