7. Which of the following is not a physical state

of matter?

A. solid

C. element

B. gas

D. liquid

Give two reasons why the flame test is sometimes invalid

Which formula represents an alkane? * C6H10 C6H12 C6H14 C6H16

Potassium chlorate (kclo3) decomposes in a reaction described by this chemical equation:2kclo3 (s) → 2kcl (s) + 3o2 (g) if 36.0 grams of potassium chlorate enter into this reaction, what is the total mass of the two products?

When researchers cool a gas, which of the following has occurred? Select all that apply. Velocity and spacing of particles is reduced Volume of substance decreases relative to temperature decrease Cooling stops once absolute zero (-273K) is reached

The strong nuclear force holds together which two particles in an atom? Electrons and neutrons Protons and electrons Neutrons and protons Neutrons and beta particles

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?