What is the frequency of individuals with doctorates work in the field of physical science

John Dalton believed which of the following about atoms? Atoms are real even though they're invisible. All atoms of a single substance are identical. The atom could be divided into smaller parts. Atoms of different substances differ by weight.

The idea that all living things are made up of cells is considered scientific law. This means the idea a) is an emerging scientific idea that has a logical explanation. b) has been tested with similar results at least twice.

Calculate the grams of solid product and excess reagent when 2.50 grams of barium chloride is mixed with 4.00 grams of magnesium sulfate. Calculate the grams of solid product when 2.

As a system becomes less random, its entropy * decreases remains the same increases

Insoluble substances can dissolve in all solvents. True or false

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?