Si se sabe que el número de masa es 40 y que la designación de su último electrón es n=4; l=0;m=0; s= -1/2. Calcular el número de neutrones.

1. baking powder is a 1: 1 molar mixture of cream of tartar (khc4h4o6) and baking soda (nahco3). a recipe calls for two teaspoons (a total of 8.0 grams) of cream of tartar. how much baking soda must be added for both materials to react completely?

Gymnast always perform on padded mats. how does the mats protect the gymnast

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4