The universe contains billions of galaxies, each containing billions of stars.

True or false

How can you determine the number of moles of a contained gas when the pressure, volume, and temperature are known values?

When you have finished adding the necessary amount of NaOH to your beaker, what color will the litmus paper turn?

Is 2Zn + 2HCI = ZnCL2 + H2 balanced or unbalanced

Differentiate concentrated acid from dilute acid.

What is increasing basicity

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