Balance the following equation: C + O2 → CO2 *

a. 2C + 2O2 → CO2

b. C2 + O2 → 2CO2

c. 2C + 2O2 → 2CO2

d. Already balanced

Which group of elements on the periodic table forms covalent compounds with other nonmetals

Calcium ions are removed from the sarcoplasm of the cardiac cell by the action of the sarcoplasmic reticulum (SR) Ca2+-ATPase pump and which other mechanism?

If element X has 52 protons, how many electrons does it have?

What is the molarity of 5.00 g of NaOH in 750.0 mL of solution?

Why did Bromophenal solutions change from yellow to blue (what chemical reaction happended) ?

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.