What the different betwen observe and reference

The periodic table is often to as the what calender

When sodium is excited in a flame, two ultraviolet spectral lines at lambda - 372.1 nm and lambda = 376.4 nm respectively are emitted. which wavelength represented photons? a) higher energy? b) longer wavelengths? c) higher frequences?

A solution contains 48.6 g glucose (c6h12o6) dissolved in 0.800 l of water. what is the molality of the solution? (assume a density of 1.00 g/ml for water.)

What is the rate constant of a first-order reaction that takes 5.50 minutes for the reactant concentration to drop to half of its initial value?

Which health condition is an infectious disease

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda