What part of this equation represents the reactants? k2co3 + 2hno3? 2kno3 + h2co3 a. 2kno3 + h2co3 b. 2kno3 c. k2co3 + 2hno3 d. 2hno3

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio