Solution chalk 0.1 m hcl water final concentration time (sec.) a 0.1g 5 ml 5 ml | 0.05 m b 0.1g 4 ml 6 ml | c 0.1g 3 ml 7 ml d 0.1g 2 ml 8 ml e 0.1g 1 ml 9 ml a. calculate the solution concentration for each of the hcl samples. the first one has been done for you. b. as the concentration of the hcl solution increased, did the speed of the reaction increase or decrease? c. therefore, as the concentration of a reactant increases, does the rate of the reaction increase or decrease? d. do your predictions previous to this investigation agree with your results? e. make a general rule about the effects of the concentration of reactants on reaction rates.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

football

explanation:

because it is

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.