Simplify the rational expression. ÷

What is the final temperature when 20.0 g of water at 25°C is mixed with 30.0 g of water at 80°C?

If.the standard enthalpy of formation of H2O(l) is -286 kJ/mol, which one of the following equations represents the formation reaction of H2O?  

Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid.LiOH(aq) + HBr(aq) → H2O(l) + LiBr(aq)

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

What is the final temperature when 20.0 g of water at 25°C is mixed with 30.0 g of water at 80°C?

If.the standard enthalpy of formation of H2O(l) is -286 kJ/mol, which one of the following equations represents the formation reaction of H2O?  

Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid.LiOH(aq) + HBr(aq) → H2O(l) + LiBr(aq)

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

A 5.0 kg crate is on an inclined ramp that makes an angle of 30. degrees with the horizontal.  If the coefficient of static friction is 0.50, what is the minimum force needed to hold the crate at rest?