Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain?

A._12.5 grams

B._25 grams

C._50 grams

D._100 grams

Calculate how many valence electrons are in H2CO, N2, Cl2?

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C

How to balance equations

A student makes the following two claims about chemical reactions: The result of a chemical reaction is immediately and clearly visible. A chemical reaction transforms one or more substances into new substances.

For the reaction of oxygen and nitrogen to form nitric oxide, consider the following thermodynamic dа ta: ΔH∘rxn 180.5 kJ/mol ΔS∘rxn 24.8 J / (mol⋅K) Calculate the temperature above which this reaction is spontaneous.

Peter is 5 ft, 11 inches tall. Paul is 176 cm tall. Who is taller?

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks