Q=cmΔT
Q1(steel)=Q2(water)
c1•m1• (t1-t) = c2•m2• (t-t2)
628•0.1•(80-t) = 4180•0.2• (t-10)
5024 - 62.8t = 836t -8360
5024 + 8360 = (836+62.8)t
<span>t = 14.9°</span>

4 0

3 years ago

For the mineral torbernite, Cu(UO2)2(PO4)2⋅8H2O, determine the total number of atoms in one formula unit

ASHA 777 [7]

Answer:

$2.47x10^{25}atoms$

Explanation:

Hello,

In this case, since the mineral torbernite has one copper atom, two uranium atoms, twenty oxygen atoms (2x2+4x2+8), two phosphorous atoms and sixteen hydrogen atoms (12x2) and therefore forty one in total, by using the Avogadro's number one is able to compute the total number of atoms in one formula unit or one mole:

$Atoms=1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O*\frac{41mol\ of \ atoms}{1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O}*\frac{6.022x10^{23}atoms}{1mol\ of \ atoms} \\\\=2.47x10^{25}atoms$

Best regards.

6 0

3 years ago

Give three examples of items that can be censused

Alenkinab [10]

A census is a survey of a complete population and not just a small sample.

You can hold a census of your entire school, your whole city, or the entire state.

A census has to include EVERYONE in the population you want to draw conclusions on. A sample would only include a small number of people from any group. The census must survey all of them.

3 0

4 years ago