This is due today please help me! thank you! <3 Fe2O3 (aq) + 6HCl (aq) 2FeCl3 (aq) + 3H2O (l)
If 4.00 moles of HCl are used with excess iron (III) oxide, how many moles of water are produced?

and

C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)
How many moles of water would be produced if 95.2 L of oxygen gas are consumed?

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

quartz

explanation:

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.