Your lab group added a small amount of chromium chloride (CrCI2) to a test tube of sodium hydroxide (NaOH). At first nothing happened in the test tube, but after a few seconds a white cloudiness appeared. after 3 minuets, the test tube was full of a white substance. Did a chemical reaction take place, yes or no? What evidence or lack of evidence do you have to support your answer?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.