When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find the number of moles of oxygen that are needed to form 6 mol of Fe2O3

How many types of biodiversity Are there

6. Which set of coefficients correctly balances the following chemical equation?___ Mg (OH) 2 + ___ HCl Imported Asset ___ MgCl2 + ___ H2O A. 1, 1, 1, 1 B. 1, 2, 1, 2 C. 1, 2, 2, 2 D. 2, 4, 2, 4

Where and when do whitecaps form?

Which statement about thunderstorms is correct? A. Lightning is seen before thunder is heard. B. Thunder can occur without lightning. C. Thunder is heard before lightning is seen. D. Lightning and thunder are not related to thunderstorms

What does every chemical reaction involve? A change in concentration. A change in mass. A change in state. A change in energy.

Which of the following transitions would release energy? n=2->n=3 n=1 - > n=3 n=3 - >n=1 n=3->n=2

Which animal group actually saw a drop in the number of endangered and threatened species between 1995 and 2005? a Fish b. Reptiles c. Birds d. Mammals

Why does burning fossil fuels put ecosystems under pressure?

What is the quantum number set of the ground-state electron that is found in helium (He) but not in hydrogen (H) ? (1, 0, 0, - ½) (1, 0, 1, - ½) (1, 1, 0, - ½) (1, 1, 1, - ½)

What must be true in order for magnetism to induce an electric current in a wire? There needs to be a switch in the circuit. There cannot be a switch in the circuit. The wire must be part of a closed circuit. The wire must be part of an open circuit.