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.

Convert 2.83 days into seconds

You are producing magnesium oxide by the reaction 2 Mg + O 2 > 2 MgO. If you start out with 6 moles of magnesium, how many moles of oxygen will you need? How many moles of magnesium oxide will you produce?

How much does 1ml of water weigh in grams?

Sodium chloride (table salt) in a water solution will dry to form crystals that we then identify

The density of a large iron and a small piece of iron will be the same because of which of the following options? A: They are both made of iron. B: Density is an intensive property. C: Both A and B. D: They have the same mass and volume.

Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can keep burning, and all you need to do is add heat and BOOM you have a flame! 15 pts

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding

As the speed of a particle increases, does its associated wavelenght increase or decrease

The composition of air by volume is approximately 1/5 oxygen, 4/5 nitrogen. When air is passed through red-hot carbon, the following reaction occurs: 2C + O2 (g) 2CO (g).