A compound that is composed of only carbon and hydrogen contains 85.7% c and 14.3% h by mass. what is the empirical formula of the compound?

Why is a single system of measurements necessary throughout the scientific community? Make sure to use complete sentences.

Which of the following solutions has the highest concentration of sugar? A. A sweetened drink is mostly water mixed with 2 grams of sugar B. A sugar solution in a bird feeder is 75% water and 25% sugar C. There is not enough information to tell D.

For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? A. SF6 B. BF3 C. PCl5 D. NH3

In order for a chemical reaction to occur there must always be

How do you describe the Doppler effect and how it relates to the distance of a galaxy from Earth?

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL

Why are lab apparatus made of ceramics

The volume of oxygen required for complete combustionof a mixture of 5 cm3 of ch4 and5 cm3 c2h4

What part of the digestive system removes most of the water from food? Question 4 options: Small intestine Stomach Large intestine Esophagus Save