John pushes his brother Danny on a skateboard. John applies a force of 39 N

and Danny's acceleration is 0.9 m/s2. What is the combined mass of Danny

and his skateboard?

A. 43 kg

B. 48 kg

C. 31 kg

D. 35 kg

Calculate the mass of silver chloride in grams required to make 5.8 g of silver plating.

Find the mass of 250.0mL of benezene. The density of benezene is 0.8765 g/mL

Select True or False from the pull down menus for the following statements. During fusion (melting), no heat has to be added to make the phase change under constant pressure.

What do you think can be done to solve the tragedy of the commons?

What type og cell is mitochandrion found in

A bond exists between A and B in the compound AB. A and B are sharing electrons. The type of bond is

Chem! 15 pts + brainliest Using Ideal Gas law, what is the volume of 5.00 mol of helium at 393.15 degrees Kelvin and 1520 mmHg? Question 17 options: 1206 L 80.7 L 10.96 L

A weather balloon is filled with helium that occupies a volume of 5.23 104 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the temperature is - 11.5°C.

An atom in the excited state can have an electron configuration of

Of the total base sequence in human DNA, what percentage codes for proteins? A) Nearly 50 percent B) About 5 percent C) About 90 percent D) 100 percent