Answer =

3) How many moles are there in 454 g of carbon? How many atoms is this?

1 mol =

-

8C

1 mol =

atoms C

Answer=

Is a Magnesium ribbon (Mg) a pure substance or a mixture?

Whats the meaning of life? This is a hard question to answer ... Some may think its rude to ask or they might be wondering the same thing ... Write and explain what you think it is ...

Which of the following has the greatest amount of thermal energy? A. 1 L water at 98 °C B. 1 L water at 70 °C C. 250 mL water at 98 °C D. 250 mL water at 70 °C

Write a balanced nuclear equation for the alpha decay of americium-241

Why should knives be washed separately from other dishes?

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.