How did mendeleev's work on the periodic table contribute to the discovery of elements?

What is the purpose of the salt bridge in a voltaic cell? A. It blocks the flow of electrons. B. It blocks the flow of positive and negative ions. C. It is a path for the flow of electrons. D. It is a path for the flow of positive and negative ions.

How many atoms of hydrogen are in 170 g of hydrogen peroxide (h2o2) ?

Which compound is an acid? A. HNO3 B. NH3 C. C2H4 D. KCl

Other than a base and a sugar unit, which of the following is a component of a nucleotide? sulfate group nitrate group phosphate group carbonate group

What is the temperature of a 1.59 L flask containing 0.175 mol of Ne at a pressure of 1.09 atm?

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2

A common stain remover is sold in concentrated form as 3M sodium hypochlorite (NaOCl). You need to create 400 milliliters of a 0.5M solution of sodium hypochlorite to fill a spray bottle. What volume of 3M sodium hypochlorite is needed? 15.0 mL 66.

A chemical reaction that takes in heat is called: exothermic endothermic a phase change

Which of the following lines (of latitude or longitude) would represent by 180 longitude? South Pole Equator Prime meridian North Pole International date line

63Ni decays by a first-order process via the emission of a beta particle. The 63Ni isotope has a half-life of 100. years. How long will it take for 65% of the nickel to undergo decay?