A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. which is the symbol of this nuclide?

When preparing dilute solutions of an acid, carefully pour - a. both liquids at once b. the acid into the container c. the acid into the water d. water into the acid?

mercury has a density of 13.6g/mol what volume of mercury must be taken to obtain 225g of the metal

Which of the following is the smallest? amino acids peptides polypeptides proteins

Where shouldn't a person stand in a lightning storm?

Why does summer happen based on the location of the sun and earth

What starting matirials do cells need for cellular respiration

What is the velocity of a wave with a frequency of 77 Hz and a wavelength of 200 m?

For the reaction: n2 (g) + 3h2 (g) ⇔ 2nh3 (g), at a particular temperature, the concentrations of n2, h2 and nh3 are 2.1 x 10-3 m, 3.2 x 10-2 m, and 1.8 x 10-1 m, respectively. calculate a value of k for this reaction

Empirical formula for 6. 63.52% Fe, 36.48% S

Name the term used for the configuration of a stereoisomer having R groups whose positions alternate from one side to the other side along the backbone chain.