PLEASE HELP Question 1:
In the reaction BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq), what phases are the reactants in before the reaction?
A)

Both reactants are gases.

B)

BaCl2 is a liquid, and Na2SO4 is a gas.

C)

BaCl2 is a solid, and Na2SO4 is in aqueous solution.

D)

Both reactants are in aqueous solution.

Question 2:
A chemical reaction has the equation 4Al (s) + 3 O2 (g) → 2Al2O3 (s). What type of reaction is this?

A)

Single displacement

B)

Double displacement

C)

Decomposition

D)

Synthesis

[ou.03jthe pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, star 1, star 2, and star 3. intensity intensity- intensity- 1000 3500 6000 8500 11000 wavelength (a) star 1 1000 3500 6000 8500 11000 1000 3500 6000 8500 11000 wavelength (a) wavelength (a) star 2 star 3 which of these statements is correct about the color of the three stars? star 2 is white in color o star 2 is yellow in color star 1 and star 3 are yellow in color star 1 and star 3 are white in color