Which compound is a conjugate acid-base pair?

H2PO4 - and HPO42-

H3PO4 and HPO42-

H2PO4 - and PO43-

H3PO4 and PO43-

How many moles of water, H2O, contain 2.0*1022 molecules of water?

A student inflates a balloon for a party inside her house, where the temperature is 23°C. She then takes the balloon outside, where the temperature is 12°C. What most likely will happen to the balloon?

The volume of a gas is 605 liters at 27.0. The new temperature is - 3.0 C. What is the new volume

To 25mL of 0.90M HCl, 275mL do distilled water is added. What is the molarity of the resulting solution?

What are the properties of the following material which make the suitable for the use given: 1. Glass in Windows 2. wooden or plastic handles on a saucepan. 3. metals used for making airplanes

Occurs when the moon moves between the Earth and Sun and blocks the light

Why have some chemicals been banned from usage in agriculture/food production

Which of the following is a pure substance

What is 825640 in scientific notation

Which type of substance can conduct electricity in the liquid phase but not in the solid phase? metallic element molecular compound nonmetallic element ionic compound