Which correct answer is it?

How many moles are equal to 2.09 x 10-7 atoms of Sodium?

Suppose 2.57g of nickel (II) chloride is dissolved in 350. mL of a 38.0mM aqueous solution of potassium carbonate. Calculate the final molarity of nickel (II) cation in the solution.

Edith will be handing out school spirit ribbons in class on Monday. She needs 70 ribbons that are each 20 cm long - a total of 1,400 cm of ribbon - but the fabric store only sells ribbons by the meter. How many meters of ribbon does Edith need?

How many moles of hydrogen are in 50.0 l of hydrogen gas at stp? 1.39 moles 2.23 moles 0.985 moles 2.74 moles 4.56 moles?

Hey man forgets that he said his coffee cup on the top of his car he starts to drive in the coffee cup rolls off the car onto the road how does the scenario demonstrate the first law of motion

If the two charges represented in the figure were brought near each other, they would a. have no effect on each other. b. repel each other. c. cause static discharge. d. attract each other.

A gas tank holds 20000 liters at 850 torr. If the temperature remains constant, what will the volume, in L, of the gas be at standard pressure, 760 torr?

Which Group (column on the Periodic Table) is the least soluble?

When ironing clothes, the primary method of heat transfer is A) conduction. B) convection. C) insulation. D) radiation.

What type of process occurs when solidified wax is converted to liquid wax on heating? endothermic exothermic decomposition reversible disintegration