A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its empirical formula?

which statement accurately describes the charge of the nucleus of an atom? - the nucleus can be either positively charged or neutral. - the nucleus never has an electrical charge. - the nucleus always has a positive charge.

Sensory neurons do what job?

Using a handbook, look up up the formula and structure of potassium hydrogen phthalate (khp) used to standardize the solution of naoh in this experiment. calculate the molar mass of kph.

In the ionic compound calcium chloride, how many chlorine ions are there for each calcium ion?

A reproducible measurement is an accurate one. A. True B. False

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?