The molar mass of gallium (\ce{Ga}GaG, a) is \pu{69.72 g/mol}69.72 g/mol69, point, 72, space, g, slash, m, o, l. Calculate the number of atoms in a \pu{27.2 mg}27.2 mg27, point, 2, space, m, g sample of \ce{Ga}GaG, a.
Write your answer in scientific notation using three significant figures.
\text{atoms Ga}atoms Gastart text, a, t, o, m, s, space, G, a, end text
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The AP Chemistry exam includes a section of equations and constants that you can reference during the exam. One of the constants included in this section is Avogadro's number, which is shown below.
\text{Avogadro's number} = 6.022 \times 10^{23}\; \text{mol}^{-1}Avogadro’s number=6.022×10
23
mol
−1

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.