What is the answer for 20+3*5?

4. 90 g of zinc are placed in hydrochloric acid (HCI). How many grams of zinc chloride are produced?

What is Grxn for the equation below? NaOH (aq) + HCl (aq) H2O (l) + NaCl (aq) -82.5 kJ -29.7 kJ 26,500 kJ 27,000 kJ

The molar mass of a certain gas is 49 g. what is the density of the gas in g/l at stp?

A sample of liquid mercury is heated from 20°C to 40°C. Which measurement of the sample will increase during this process? volume, density, mass

In which layer of the Earth does the motion of the convection currents drive plate movement? A.) mantle B.) outer core C.) asthenosphere D.) lithosphere

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?

Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. : D

According to the graph, which activity has used the largest amount of water over the past twenty years?

Tiffany leaves balloons filled with helium gas inside her car in on a sunny day when she returns to her car some some of the balloons are much larger and a few have popped explain what happened