Is food coloring dissolving in water a chemical change

True or false a surface wave moves the medium in the same direction as the wave travels

How many atoms are in 0.230grams Pb

Which of the following are correct statements? Check all that apply. A. A neutron is a neutral particle in the nucleus. B. A proton is a positively charged particle that orbits the nucleus. C.

Consider the following balanced redox reaction. 2S2O32 - + I2 → 2I - + S4O62 - How many moles of I2 can be consumed by 0.65 mL of 0.15 M Na2S2O3? a. 9.75 x 10-4 moles b. 1.95 x 10-3 moles c. 2.17 x 10-2 moles d. 4.88 x 10-5 moles

Which is true according to the kinetic theory? A. the particles that make up solids do not move. B. all particles of matter are in constant motion. C. all particles of matter move very quickly D the particles that make up gases are densely packed

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.