Which equations are balanced? Check all that apply.

Mg3N2 + H2O → 3MgO + 2NH3

C3H8 + 5O2 → 4H2O + 3CO2

Zn + 2HCl → ZnCl2 + H2

3Ca (OH) 2 + 2H3PO4 → Ca3 (PO4) 2 + 6H2O

3H2SO4 + 2Fe → Fe2 (SO4) 3 + H2

4Al + 3O2 → 2Al2O3

What are x rays called that have undergone a change in direction after interactions with atoms?

A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s.

Two parallel plates have equal and opposite charges. When the space between the plates is evacuated, the electric field is E = 3.50*105 V/m. When the space is filled with dielectric, the electric field is E = 2.30*105 V/m. 1.

Jeremiah is riding his bicycle to the east. It takes him 10 seconds to change his velocity from 10 m/s to 15 m/s. What is Jeremiah's acceleration? 5 m/s 5 m/s/s 0.5 m/s 0.5 m/s/s

If element X has 14 protons, how many electrons does it have?

A person performs 300 j of work over the course of 60 seconds how much power they did required

If you have a 90 V power source with a 30-Ω and 60-Ω resistor in series, what is the voltage drop over the 60-Ω resistor? 30 V 2 V 60 V 90 V

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object

An initially uncharged air-filled capacitor is connected to a 5.83 V charging source. As a result, 3.41*10-5 C of charge is transferred from one of the capacitor's plates to the other.