What is the mass of 5000. atoms of silicon

Completethe mass in grams of sample of carbon containing 68 atoms?

The combustion of propane (C₃H₈) produces 2220 kJ of energy per mole of propane consumed. How many grams of propane will be required to heat 67.0 gal of bathtub water from 25.0°C to 35.0°C if the process is 80.0% efficient? (1 gal = 3.

What geometry does VSEPR predict for the central atom in NCl3

Which element would you expect to have the most similar properties copper and zinc nitrogen and oxygen carbon and silicon

Classify each of the following substances as an element or a compound: (a) hydrogen, (b) water, (c) gold, (d) sugar.

Calculate the ph of the resulting solution if 34.0 ml of 0.340 m hcl (aq is added to

One of the signs of a chemical reaction is taking place

If force is held constant as surface area decreases pressure

Which group contains elements composed of diatomic molecules at stp

Some types of bases are used to make soap. true or false