In a 0.25 M solution of HA (a weak acid), 1.0 % if the HA is ionised. a) Calculate the actual concentration of HA, H₂O ^+ and A^- in this solution ?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes