HELP ME, PLEASE Add 3.6 grams of mixture A consisting of two carbonate salts of the two successive metals in group IIA to react with the excess HCl acid solution to obtain gas B. Allow all gas B to absorb completely by 3 liters of solution Ca. (OH) 2 0.015M obtained 4 grams of precipitate
Determine the salts in mixture A and calculate the mass% of the salts in A

Can someone me with questions 12 and 13 plz.

[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

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