Cho số hiệu nguyên tử của clo, oxi, natri và hiđro lần lược là 17; 8; 11 và 1. Hãy xét xem kí hiệu nào sau đây không đúng? A. B. C. D.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.