57:30 The equations are not balanced. Which equation would have the same coefficients in the same order as 2CO2 +
3H20 → C2H2O + 302?
O FeCl3 + NH4OH → Fe(OH)3 + NHACI
O CH4 + O2 → CO2 + H2O
O Fe + H2SO4 → Fe2(SO4)3 + H2
O PCI+ H2O → HCl + H3PO4

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.