Is mixing salt and pepper physical or chemical change?

B (OH) 3 and B (OH) 4^- Which one is the acid?

Suppose you were to make a ring from a single strand of gold atoms. How many gold atoms would be required to make such a ring? How much would the ring weigh in grams?

In what way are all sound waves and light waves similar?

Which would be best categorized as heat transfer by convection? A) Wearing a white shirt to stay cool on a summer day.

Explain why iron, cobalt, and nickel are not in the same group of elements

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.