Answer:
b)15.0°C
Explanation:
Specific Heat of Water=4.2 J/g°C
This means, that 1 g of Water will take 4.2 J of energy to increase its temperature by 1°C.
∴80 g Water will take 80×4.2 J of energy to increase its temperature by 1°C.
80×4.2 J=336 J
Total Energy Provided=1680 J
The temperature increase=\frac{\textrm{Total energy required}}{\textrm{energy required to increase temperature by one degree}}
Temperature increase=
=5°C
Initial Temperature =10°C
Final Temperature=Initial + Increase in Temperature
=10+5=15°C
Don't you think that element is ferrous i mean iron.
Answer:
c,e,f
Explanation:
Judging by what i tried to find out about this reaction, it seems that won't take place, though it could be wrong.
Answer:
A- Speed = distance/time
Explanation:
Would make sense and that's what I remember
Okay, to explain this you might have to grab a periodic table.
Do you have one? Good. Look at the most left side of the periodic table. The first group is the largest atoms in the periodic table. If you go to the right of the periodic table, the atoms get progressively smaller and smaller.
Why is this? Don't atoms get more electrons, and so become significantly bigger as they move to the right?
Although atoms do get more electrons as they go to the right, they also get more protons too. Protons pull on electrons and make atoms smaller. Because of this, going from left to right in a periodic table makes the atoms smaller and smaller, since more and more protons are added.
In this scenario, Aluminum is more to the right than Sodium, which means that it has more protons. Because of this, the protons in Aluminum pull more strongly on electrons than sodium, thus making aluminum smaller.
(Just a side note, going down in a periodic table makes the atoms bigger, since new shells are added every time)
Good luck! If you need any help, just ask :))
-T.B.
