How many molecules are in 9.8 grams of calcium

A 77.5 g sample of an unknown solid is heated to 62.5°C and placed into a calorimeter containing 93 g of water at 23.3°C. If the final temperature of the solid sample and the water is 26.

What color is phenolphthalein in acidic conditions and what color is it in basic conditions?

Write an ionic equation to show that carbonic acid, h2co3, behaves as an acid in water

What is the Ka of a 1.5 M solution of HA that has a pH of 1.61

A solid substance that has a naturally geometric shape with symmetrically arranged plane faces

Which statement correctly describes why a compound is a pure substance? O A compound is not a pure substance because each of its molecules is m elements A compound is a pure substance because its molecule cannot be broken O A compound is not a pure

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons?

A food web shows the easiest way to get the most energy out of a producer the path a producer has to take to reach the top of the web how all organisms are connected through energy all of the possible energy pathways through an ecosystem

What phase change is endothermic

A Gran plot for a potentiometric titration resulted in a slope of 5.56 x 105. Measurements were made using SCE as the reference electrode and the analyte Eo was determined to be 0.354 V.