Chemical properties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance d. can be observed without altering the identity of a substance

What is the percent composition of hydrogen in water

What is the difference in the beginning between primary succession and secondary succession? a. secondary succession has water b. secondary succession has soil c. primary succession has soil d. primary succession has water

In what month is Earth farthest from the Sun? A. January B. July C. March D. October

Which of the following characteristics is NOT true of cold fronts? A. Violent weather such as thunderstorms occur along them. B. The temperature drops as they pass. C. Clear weather usually follows them. D. They move more slowly than warm fronts.

Is the water more or less dense as you go deeper?

Tear gas has the composition 40.25% carbon, 6.19% hydrogen, 8.94% oxygen, 44.62% bromine. what is the empirical formula of this compound?

Explain why ships traveling from east to west across the Atlantic take days longer than ships traveling the same distance from west to east.

In a titration 25.0 ml of a. 20 M NaOH solution is used to neutralize 10.0 ml of HCl. Write the equation for this neutralization reaction and calculate the molarity of the acid.

4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm what is the independent variable, dependent variable and three constant variables?

In the chemical laboratory, why do scientists use a mortar and pestle? a. to increase surface area of a solute b. to decrease surface area of a solute c. to increase temperature of a solute d. to decrease temperature of a solute