Who made polio vaccine

Two students measure the time it takes for a race to finish. One student measured 75.5 seconds. The other student measures 1 minute and 15 seconds. Both students are correct. Why?

When you hear the word decahydrate, what number should be written in front of the formula for water?

To use Charles' Law, which of the following needs to remain constant? A. Temperature and volume B. Temperature and the number of moles of a gas C. Pressure and volume D. Pressure and temperature E. Pressure and the number of moles of a gas

Cuantos moles de co2 tendremos 54.2 gramos de co2

For the chemical equations shown below, label each reactant as either acid or base, and each product as either conjugate acid or conjugate base according to the brønsted-lowry definition. drag each label to the appropriate target.

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of water?

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.