Whats the defenition of elements? I know what it means but I cant explain it lol

Based of the chemical reaction below, if you have 3.56x10^23 molecules of C3H8, how many liters of CO2 gas will be produced at STP? C3H8+5) 2-->3CO2+4H2O

Which statement best describes the work and energy in these examples? Example 1: Running a car requires gas. Example 2: Humans require food to live. 0 The gas and food are examples of energy.

What happens when the thermal energy of a substance increases? A - The motion of the particles in the substance increase, and the temperature of the substance decreases.

How is C10 H16 + 8 Cl2 + 10C + 16 HCL written

Which is considered a cation? A. H + B. Cl - C. Ne D. He

The element Oxygen, O, is an example of which of the following? Question 8 options: A compound B molecule C atom D mixture

For the reaction N2 (g) + 3H2 (g) 2NH3 (g), what will happen if more ammonia gas is added?

If Plank's constant is 6.6 x 10 (-34) J/Hz, then what is the approximate frequency of a photon having an energy of 3 x 10 (-19) Joules?

What's the difference between a cation and an anion

Which element has the fewest valence electrons available for bonding? iodine aluminum carbon nitrogen