Select the statement about electrons and atons that is true 1.each orbits holds a fixed number of electrons 2.the n=1 orbit can only hold one electron 3. each orbit can hold an unlimited number od electrons 4.each orbit can only hold four electrons

Consider the balanced equation below. n2h4 + 2h2o2 n2 + 4h2o what are the mole ratios of hydrazine (n2h4) to hydrogen peroxide (h2o2) and hydrazine to water? 1: 2 and 1: 4 1: 3 and 1: 4 1: 2 and 3: 5 1: 3 and 3: 5

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as