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What is the formula for magnesium sulfide?

What is the percent yield for the reaction below If 119.3 g of PCl5 (MM = 208.2 g/mol) are formed when 61.3 g of Cl2 react with 216.5 g of PCl3 (137.32 g/mol)? PCl3(g) + Cl2(g) → PCl5(g)

Consider the following balanced reaction. How many grams of water are required to form 62.2 g of HNO3 ? Assume that there is excess NO2 present. Molar masses: H2O = 18.02 g/mol, HNO3 = 63.02 g/mol, NO2 = 46.01 g/mol,NO = 30.01 g/mol.               3 NO2 (g) + H2O(l) → 2 HNO3 (aq) + NO(g)

What are the two different ions present in the compound Al(NO3)3? 

Name the compound Cl2O5. 

How many molecules of carbon disulfide are in 0.0313 moles of carbon disulfide? 

Research seems to support the hypothesis that REM sleep is linked with:

Observe the following:      X                X                X     X                X                X     X                X                X Most people tend to perceive the stimuli above as being three vertical sets. The perceptual principle that most accounts for this perception is the principle of _______________.

    What region of the brain is most involved in critical thinking, decision-making and other higher order thought processes?

According to the activation-synthesis theory (Hobson & McCarley), dreams are a biological byproduct of sleep resulting from meaningless images flashed in our minds during REM sleep and the attempt of our forebrains to make sense of these random images.