Science does not include

beliefs or opinions

theories

laws

conclusions

The gas in an engine cylinder is compressed until it has a volume of 0.045 liter and an absolute pressure of 28 atmospheres. If the engine cylinder contains 0.020 mole of gas, what is its temperature? The temperature of the gas is how many K.

Which structures are found on sponges? pores medusae polyps stinging cells

How is the mass of 1 mole of an element determined

Find the ph of a 0.250 m solution of nac2h3o2. (the ka value of hc2h3o2 is 1.80*10-5). express your answer numerically to four significant figures.

Which is always the first step in dealing with an accident in the lab?

Why is it incorrect to balance a chemical equation by changing the subscripts?

A solution of CuSO4 is labelled 0.01 M. How much CuSO4 in grams, must be used to make 1 liter of solution? A) 1.120 g B) 1.595 g C) 1.6 g D) 15.0 g

Rank the following elements according to their ionization energy: tin krypton antimony arsenic

Water (3030 g) is heated until it just begins to boil. If the water absorbs 5.49*105 J of heat in the process, what was the initial temperature of the water?

Identify the number of core and valence electrons for each atom. Xe : core electrons Xe : valence electrons Ca : core electrons Ca : valence electrons Br : core electrons Br : valence electrons