Which of these is an indication that a chemical reaction has occurred?

A. melting of a substance

B. boiling of a substance

C. formation of a precipitate

D. freezing of a substance

Henry law is obeyed by a gas when gas has high a) Pressure b) Temperature c) Solubility d) Non of the above

The inner planets are called terrestrial because they a. have no atmosphere. c. have Earth-like oceans. b. are small and highly dense. d. are visible from Earth.

Choose the correct net ionic equation for the reaction (if a reaction occurs) between CaCl2 and AgNO3: Group of answer choices 1. Ca2 2AgNO3 - -> 2Ag 2. Ca (NO3) 2 Ca2 3. 2NO3 - - -> Ca (NO3) 2 Ca2 4. 2Cl - 2Ag 2NO3 - - -> 2AgCl 5. Ca (NO3) 2 Ag 6.

Light cannot pass through solid matter

Convert 0.00039 Mm to millimeters

Which type of soil holds the least water

Eq-43 which type of fire extinguisher should be onboard a vessel with a permanently installed fuel tank

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.