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makkiz [27]
4 years ago
11

Help....................

Chemistry
1 answer:
Ray Of Light [21]4 years ago
4 0
Total cost: $603.42

Tickets (total): 134.23*4= $536.92

603.42-536.92= $66.50

Hot dog (total)= $9

66.5-9= $57.50

Popcorn (total)= $17.50

57.50-17.50= $40

They bought 2 parking passes

40/2=20

Answer: Each pass costs $20
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stepladder [879]

Answer:

C. Light slows down as it goes through more dense materials.

8 0
3 years ago
How many moles of silver atoms are in 1.8 x 10^-21 atoms of silver?
rodikova [14]
Hola!

We know,
1 Mole of anything has 6.02 × 10^{-23} particles

According to Question,

6.02 × 10^{-23} = 1 Mole

Thus,

1.8 × 10^{-21} / 6.02 × 10^{-23} = 0.33 Moles

hope it helps!
6 0
4 years ago
Calculate the mass in grams of 0.0420 moles of copper
galben [10]
4.2 grams i think i hope this helps
8 0
3 years ago
Zachary adds 9.7 g to 1.114 g.<br> How many significant figures should his answer have?
makvit [3.9K]
Always use least amount of sig figs possible. So this 9.7 would be (answer): 2 sig figs
5 0
3 years ago
For the following nuclear reaction, what was the beginning radionuclide (X)? X → 86Rn222 + 2He4
BigorU [14]
The original radioisotope underwent double-alpha decay, where the original nucleus lost a total of 4 protons and 4 neutrons.

The original radioisotope would have an atomic number of 86+4 (protons), and would have an atomic mass of 222+8 (protons + neutrons). This would make the element Thorium-230, or 90Th230.
3 0
4 years ago
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