Element X, i n Perio d 3, ha s th e followin g properties. ● It s oxid e ha s a gian t structure. ● I t form s covalen t bond s wit h chlorine. ● Its oxide will neutralise H C l (aq). What is element X?

What is the pH of a solution that contains 25 grams of hydrochloric acid (hcl) dissolved in 1.5 liters of water?

70 mL of liquid (density = 0.85 g/mL) is added to a graduated cylinder that has a mass of 60.75 g. what is the mass of the cylinder plus the liquid?

Which formula can represent hydrogen ions in an aqueous solution? OH - (aq) Hg2^2 + (aq) H30 + (aq) NH + (aq)

What is energy efficiency, and why is increasing it important?

The life function of transport in an organism directly involves those activities used to 1. absorb and distribute materials 2. obtain and hydrolyze materials 3. release energy from food 4. produce cellular waste product

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.

Solve for x: ln x = 0.863. Report your answer to 3 significant figures.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch