Which statement best explains why carbon is present in so many kinds of molecules? it has valence electrons. it can form four covalent bonds. it is abundant on earth. it can become an ion.

Saffron costs $368.00 per ounce. Determine how many grams you can purchase for $15.00.

A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.73 m. If the initial temperature of the water is 17.5°C, how much heat must be added to the water to raise its temperature to 29.7°C? Assume that the density of water is 1.

14.0g N2 react with 3.15g H2 to give an actual yield of 14.5 NH3

What is one differrence between a mixture and a compound

Aluminum is a metallic element with 3 valence electrons. What is its oxidation number?

What is the pressure, in mm Hg, of 2.50 moles of an ideal gas if it has a volume of 50.0 liters when the temperature is 27.0° C?

What element has the same valence electrons as carbon A) N B) AI C) Si or D) Be

What element is represented by the following electron configuration: 1s22s22p63s23p64s23d4 Question 2 options: Cr Ca Ge Ar

He substance, cocl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

The weighted average atomic mass of an element depends upon the a. relative abundance of protons in the element b. mass and relative abundance of each isotope of that element c. mass and relative abundance of each neutron of that element d.