Which of these is true about a pH meter?

A. It is inexpensive to use.

B. It measures pH indirectly.

C. It does not require calibration.

D. It can be used in any acid-base titration.

Which of these is a reason a scientist might repeat an experiment? A. to compare one theory to another theory B. to check their own work in a previous experiment C. to make sure that the question is actually testable D.

A cylindrical can is to be made to hold 1L of oil. Find the height of the can, in centimeters, that will minimize the cost of the metal to manufacture the can. Assume the base, sides and top are made of the uniformly thick metal and ignore seams.

What is an ionic compound that contains only non metallic elements?

In which volcanic eruption is pyroclastic materials released

Which reason best explains why plasmas are good conductors of electricity? they have mobile charged particles. they are at extremely high temperatures. they are made up of particles in fixed positions.

Calculate the formula mass for each compound. a. NO2 b. C4H10 c. C6H12O6 60. Calculate the formula mass for each compound. a. MgBr2 b. HNO2 c. CBr4 d. Cr (NO3) 3

How many electrons will calcium gain or lose when it forms an ion?

Which statement describes thermal energy? the energy that is associated with electric fields the energy that is stored in chemical bonds the energy that is associated with the pull of gravity the energy that is associated with temperature

Give the formula %error = theoretical value - experimental value / theoretical value * 100 calculate the percent error for the experiment.

A baker touches a pie right after taking it out that of me which statement best explains why the pie feels hot