In this complete ionic equation of a double replacement reaction, circle the spectator ions and write the net ionic equation.
Na2Co3 (aq) +2HNO3 (1) ---> 2NaNO3 (aq) +H20 (1) +CO2 (g)
Complete ionic equation:
2Na + CO3- + 2H + 2NO3 > 2Na + 2NO3 + H2O + CO2 (g)
Net ionic equation:

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro