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iogann1982 [59]
3 years ago
11

Katie looks out her bedroom window on a clear night. The stars in the sky look like tiny points of light.

Chemistry
2 answers:
jok3333 [9.3K]3 years ago
6 0

Answer:

The Sun looks bigger than other stars because its more closer to the earth than the stars.the farther anything is distant from us the tinier it will look

Explanation:

plz mark brainliest if thats ok|?

Free_Kalibri [48]3 years ago
3 0

Answer:

Katie looks in window in a night. stars in the sky lighting katie look the sun is like star,but it looks large than all stars in the sky.

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When an atom gains or loses electrons and has and does not have an equal number of
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Answer:

it is called an ion

Explanation:

if it gains electrons then it is an anion

if it gains protons it is a cation

typically non metals are anions and metals are cations

4 0
2 years ago
In this prelab exercise, you will calculate how to prepare solutions that you will make in lab. Below is an example of how to pr
Anastasy [175]

Explanation:

Molarity=\frac{\text{Moles of compound}}{\text{Volume of solution (L)}}

Moles of compound =

\frac{\text{mass of compound}}{\text{Molar mass of compound}}

We have ;

Volume of solution = 600 mL = 0.600 L ( 1 mL = 0.001 L)

Moles of NaOH = n

Molarity of the solution = 3 M

3M=\frac{n}{0.600 L}

n = 3 M × 0.600 L = 1.800 mol

Mass of 1.800 mole sof NaOH :

1.800 mol × 40 g/mol = 72.0 g

Preparation:

Weight 72.0 grams of sodium hydroxide and add it to the 500 mL of volumetric flask along with some water. Dissolve the all the solute by adding small proportion of water. After the solution becomes clear make the water upto the mark of 500 ml.

Transfer the solution to a bigger beaker  and 100 mL of water more to it.

6 0
3 years ago
A certain first order reaction has a half-life of 54. 3 s. How long will it take (in s) for the reactant concentration to decrea
Maksim231197 [3]

Answer:

82.4 s

Explanation:

Find the NUMBEr of half lives...then multiply by 54.3

2.27 = 6.5 (1/2)^n

log (2.27/6.5) / log (1/2) = n = 1.52 half lives

1.52 * 54.3 = 82.4 s

8 0
1 year ago
What quantity is measured in mol/dm³?
natima [27]
L
M =  \frac{n}{V}  \\ M = \frac{mol}{L}  \\ or \\ M =  \frac{mol}{ {dm}^{3} }
mol/dm³ is measure for molarity
3 0
3 years ago
How is the life cycle of a star similar to that of a human?
QveST [7]
Stars have a life cycle, just like people: they are born, grow, change over time, and eventually grow old and die. Most stars change in size, color, and class at least once in their lifetime.
Brainliest?
4 0
2 years ago
Read 2 more answers
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