Consider sodium oxide, Na2O. Choose the best explanation for the subscript, 2, from the list provided.

Sodium is in group 1 of the periodic table. A sodium ion (Na+) has a charge of + 1. Which of the following would be most likely to combine with an sodium ion to form a new compound? A. a helium atom that has no charge B.

The following equation describes how sodium and chlorine react to produce sodium chloride: 2Na + Cl2 - > 2NaCl Is the equation balanced? Explain your answer. Its balanced but idk how?

Which is the best example of predation? Hookworms live in the intestines of dogs and feed on their blood. Barn owls often capture and eat mice that live in fields. A colony of termites protects the eggs laid by a queen termite.

Which phrase describes a solution? A. A homegeneous mixture B. A graduated substance C. A heterogeneous mixture D. A primary mixture of elements

CH3 + HCl CH3Cl + H2O Kp = 4.7 x 10^3 at 400K. CH3Cl and HCl combine in 10.00L at 400K. The pressure of CH3OH is 0.250 atm and the pressure of HCl is 0.600 atm (I might have wrote this down wrong).

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons

The ideal gas law shows us how a gas will behave under many conditions. The formula is: P V = n R T Where P = pressure, V = volume, n = amount of the substance, R = ideal gas constant, and T = temperature.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?