If I have 6.02x10^23 atoms of silicon, how many grams of silicon do I have?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

Ajay likes to eat a lot chocolate. His sister Anita asks him to brush his teeth before going to sleep in the night every day. Ajay says brushing the teeth in the morning is enough. (i) Who is correct? Why? Justify. (ii) What is the value displayed

In a 1.0-liter container there are, at equilibrium, 0.10 mole h2, 0.20 mole n2, and 0.40 mole nh3. what is the value of kc for this reaction at this temperature

Beryllium (Be) and fluorine (F) combine to make the compound BeF2. What is the chemical name for this compound?

How many moles of oxygen atoms are present in 5 moles of Mg3 (PO4) 2

What are the three requirements for an effective collision

What is the force applied when using a simple machine.

Select all that apply. when the products of a reaction have more energy than the reactants: the reaction is exothermic. the reaction is endothermic. the reactants gave up energy. the δh is positive.

How can you determine the number of valence electrons in an atom of a representative element?

Find the cube root of 2.7*10^10