What property of carbon gives it the ability to form many different biological macromolecules, and why is this so important to life?

Geologic evidence shows that Earth's tectonic plates can move thousands of kilometers across the Earth's surface. These movements A. do not change the Earth's surface at all. B. occur gradually over millions of years. C. occur due to human activity.

Which number indicates the energy level of an atom's valence electrons? answers?

How do you calculate the formula mass of Ca3 (PO4) 2

Atoms of the same element zinc for example have the same number of what

A propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. Which condition of the gas remains constant? volume pressure temperature

A 40.0 g drinking glass is filled with hot liquid. The liquid transfers 1,000. J of energy to the glass. If the temperature of the glass increases by 50.0 degrees Celsius, what is the specific heat of the glass?

What is the percent by mass of oxygen in propanal, CH3CH2CHO? (1) 10.0% (3) 38.1% (2) 27.6% (4) 62.1%

In which orbitals would the valence electrons for selenium (Se) be placed? s orbital and f orbital s orbital only s orbital and p orbital d orbital only

Hydrogen reacts with chlorine to form hydrogen chloride (HCl (g), Delta. Hf = - 92.3 kJ/mol) according to the reaction below. Upper H subscript 2 (g) plus upper C l subscript 2 (g) right arrow 2 upper H upper C l (g). Which statement is correct?

Below is the lewis structure of the fluoramine nh2f molecule. nfhh count the number of bonding pairs and the number of lone pairs around the left hydrogen atom.