A rectangle solid of unknown density is 5 m long two meters high and 4 meters wide. The mass of this solid is 300 grams. Find the volume and density

The atomic masses of cl 35 (75.53 percent) and cl 37 (24.47 percent) are 34.968 amu and 36.956 amu. Calculate the average atomic mass of chlorine.

The circle on the left shows a magnified view of a very small portion of liquid water in a closed container. What would the magnified view show after the water evaporated

Which is an element A. H2O B NaCl C Mg D CO

Describe the relationship between nitrogen, oxygen, and air. is it an element, compound, or mixture?

Why do sugar crystals dissolve faster in hot water than in cold water?

What are elements and how do they differ?

Write the structire of the salt that forms when diethylamine is mixed with hydrochloric acis

The heat of combustion of propane, C3H8, is 2220 kJ/mol. The specific heat of copper is 0.385 J/g°C. How many grams of propane must be burned to raise the temperature of a 10.0 kg block of copper from 25.0°C to 65.

Which is an example of Temporal Isolation? A. Flowers that bloom in different months. B. Birds that have different mating calls C. Fruits flies that mate in different locations. D. Squirrels that have different fur colors

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer