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Pani-rosa [81]
3 years ago
12

if a star is located 100 light years away from earth, how long does it take for its light to reach the earth

Chemistry
1 answer:
olga55 [171]3 years ago
8 0
If a star is located 100 light years from Earth, the light will take 100 years to reach Earth.
I hope this helps !
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Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas.
Phoenix [80]

The correct answer is option B, that is, hypothesis.  

A hypothesis refers to an anticipated illustration for an occurrence. It refers to a proposed illustration or a supposition made on the groundwork of inadequate proof as an initiation point for further investigation. In order for a hypothesis to be a scientific hypothesis, the scientific method needs that one can examine it.  


6 0
3 years ago
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What is the measurement 1043. L rounded off to two significant figures?
Sloan [31]

Answer:

1000L

Explanation:

the 1 is a sig fig and since the 0 is between the 1 and 4 its also a significant number. to round them off you look at the 0,then look back at the 4 since its less than 5 u round down. then u replace the 43 with 0's

3 0
3 years ago
0.0075 mole of calcium trioxocarbonate(IV) is
KatRina [158]

Answer:

0.0075÷0.015=0.5 not so sure lol

4 0
3 years ago
E)¿Cuántos átomos de oxigeno hay en la molécula de glucosa, al reaccionar 12moleculas de agua?
elena55 [62]

Answer:

12 átomos de oxígeno hay presentes

Explanation:

Basados en la reacción:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

<em>6 moles de agua producen 1 mol de glucosa</em>

<em />

Si reaccionan 12 moleculas de agua, se producirán:

12 moleculas H₂O * (1 mol C₆H₁₂O₆ / 6 mol H₂O) =

2 moléculas de glucosa se producen.

Como cada molécula de glucosa tiene 6 átomos de oxígeno:

2 moléculas C₆H₁₂O₆ * (6 átomos Oxígeno / 1 molécula C₆H₁₂O₆) =

<h3>12 átomos de oxígeno hay presentes</h3>

6 0
3 years ago
What is basicity in acids?​
timama [110]
Basicity of an acid is the number of hydrogen ions which can be produced by one molecule of an acid
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