what is the term for the smallist bit into which a chemical substance can be divided and still have the properties of that substance

If the volume of a cylinder is reduced from 8 L to 4 L the pressure of the gas in the cylinder will change from 70 kilopascals to

What other non metal can be used to displace less active metals from their metal oxides

4.0 L of He (g), 6.0 L of N2 (g), and 10. L of Ar (g), all at 0°C and 1.0 atm, are pumped into an evacuated 8.0 L rigid container, the final pressure in the container at 0°C is

Which element will not react with other elements. be ne fe?

Why is nitrogen fixation necessary?

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below

How much energy is needed to convert 57.3 grams of ice at 0.00°c to water at 75.0°c? specific heat (ice) = 2.10 j/g°c specific heat (water) = 4.18 j/g°c heat of fusion = 333 j/g heat of vaporization = 2258 j/g?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?