According to the activity series, all of the following single replacement reactions occur EXCEPT-
A 3 Mg (s) + 2 AI(NO3)2 (aq) → 3 Mg(NO3)2 (aq) + 2 Al (s)
B 2 Fe (s) + 3 Pb(NO3)2 (aq) → 2 Fe(NO3)2 (aq) + 3 Pb (s)
C Zn (s) + Cu(NO3)2 (aq) → Zn(NO3)2 (aq) + Cu (s)
D 3 Ag (s) + CO(NO3)3 (ag) → 3 AgNO3 (aq) + Co (s)

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

[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

What is the pressure of 0.500 moles of carbon dioxide gas in a 2.5 l tank and at a temperature of 301 k? (r=0.0821 l·atm/mol·k) 3.08 atm 1.2 atm 0.23 atm 4.01 atm 4.94 atm