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Pie
2 years ago
6

HELP PLS BRAINLEST

Chemistry
2 answers:
Maurinko [17]2 years ago
8 0
First of all, a light-year is the distance light travels in one year. The star Alpha Centauri is about 4 light-years away, so light from Alpha Centauri takes 4 years to get to the Earth
Aleks04 [339]2 years ago
4 0
It would take 4 years to reach earth
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Another chemistry question i’m not good at this at all:( has me stressed
adoni [48]

Answer:

Average atomic mass = 15.86 amu.

Explanation:

Given data:

Number of atoms of Z-16.000 amu = 205

Number of atoms of Z-14.000 amu = 15

Average atomic mass  = ?

Solution:

Total number of atoms = 205 + 15 = 220

Percentage of Z-16.000 = 205/220 ×100 = 93.18%

Percentage of Z-14.000 = 15/220 ×100 = 6.82 %

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (93.18×16.000)+(6.82×14.000) /100

Average atomic mass =  1490.88 + 95.48 / 100

Average atomic mass =  1586.36 / 100

Average atomic mass = 15.86 amu.

5 0
3 years ago
HELP PLZ
Vinvika [58]

Answer:

1). 19.9

2). 0

8 0
3 years ago
What happens to dissolving rate when you increase KE?
TEA [102]
In general, solubility increases with temperature. When you increase the temperature of a solvent, you increase the kinetic energy (or energy of movement) of the molecules, and this greater energy helps dissolve more of the solute molecules.
4 0
3 years ago
I need to know the measurements of this to the appropriate amount of significant figures
igomit [66]

Answer:

[See Below]

Explanation:

I'd say 44 something. It's probably ml but I can't see what it says on the tube.

3 0
3 years ago
Some people say that only gay and bisexual men are likely to be infected with hub true false
shusha [124]

Answer:

They do have a larger chance, but others might be infected too.

PLS GIVE BRAINLIEST

3 0
3 years ago
Read 2 more answers
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