Thien

5/8 of the students in my class were boys. When 6 girls joined the class, the number of boys equaled the number of girls. How many students were in my class then?

Nevermind Got it Block has two forces acting on it Horizontal force is the centripetal force acting towards center of circle Vertical force is M x G To get angle, its inverse Tan (MV^2/RMG)

density is mass/volume. Since they give you the mass of 55.81g already, you need to find the volume which is 24.7mL-17.6mL=7.10mL. 55.81g/7.10mL= 7.86 g/mL. mL=cm^3 so it becomes 7.86 g/cm3 or 7.86 gxcm^-3. The metal that matches this density is Iron.

Shouldn't it be +678 because the formula is E= deltaHf-(H sub + IE + HBE/2)- HEA?

Why do you have to square Ag after you got the Molarity? -(0.00645)^2(0.0968)=4.03E-6

3/5 students are girls, so 2/5 students are boys. 200 = 2/5 boys therefore 1/5 = 100. Thus 3/5 girls = 300 Total: 500 students