An 0.648 g sample of isobutene contains 0.556g of carbonand the rest is hydrogen. 0.5 mol of isobutene has a mass of 28.5g. what is the empirical formula and molecular formula?

An antacid tablet weighing 0.853g contained calcium carbonate as the active ingredient, in addition to an inert binder. When an acid solution weighing 56.519g was added to the tablet, carbon dioxide gas was released, producing a fizz.

Which of the following is an example of a monopole sound source? a. gunshot b. tuning fork c. all of the choices d. loudspeaker working without an enclousure

We know that one mole of Oxygen gas contains two moles of O atoms (remember that O is a diatomic element in nature and is written O2). If we have a sample of O2 that contains 1.0000 x 10-20 mol, we will have (blank) atoms of O in the sample.

What is The maximum amount of a substance that can be dissolved by another substance

What is the overall charge of the NaCl molecule?

How much energy is required to vaporize 0.5kg of water?

Can u give me uses of sodium

Why are the internal structures of these limbs similar?

If this energy were used to vaporize water at 100 ∘C, how much water in liters could be vaporized? Assume that the density of water is 1.0 g/mL. The heat of vaporization of water at 100 ∘C is 40.7 kJ/mol.

How many moles of solid naf would have to be added to 1.0 l of 2.39 m hf?