As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedures. They measured the mass of each substance before and after each reaction. The table shows their observations. Assuming the students did not make any careless errors, what likely explains these changes in mass?

A. Procedure 1: All the reactants were liquids that evaporated.
Procedure 2: A gas was formed as one product, and it escaped into the air.

B. Procedure 1: One of the reactants was converted to thermal energy.
Procedure 2: All the products were liquids.

C. Procedure 1: The reactants were liquids with different densities.
Procedure 2: The reactants were combined into only one product.

D. Procedure 1: One of the products was a gas that escaped into the air.
Procedure 2: A gas from the air reacted with one of the other reactants.

PLEASE ANSWER WITH EXPLINATION

i think it's a)sparta

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.

because everyone tends to get their feelings hurt if they don't agree with something someone is doing and vice versa. it's a major issue that needs to be dealt with, especially in the christian society. everyone thinks that christians hate gay people, because it is a sin, and christians "just hate everyone who sins and every one is going to hell for sinning"(saying that all in a sarcastic tone but i'm just going to go ahead and tell you why everything with that type of view on christians is wrong.

#1. christians do not hate gay people. and if they do, then that is their own personal problem. christians are not supposed to hate anyone. if you hate a neighbor (or any person basically), then that is as if you are hating jesus.

#2. being gay is in fact a sin according to the holy bible. it is in genesis. and no, the fact that it is a sin, does not mean that god hates you. he is grieved that a person is sinning against his word, but he still loves that person. in fact, christians are supposed to love everyone. we are supposed to love our enemies, but hate the sin they are doing. we love you and respect you, but we do not agree with every decision you make, is basically what i'm trying to say.

hope this you ! (: