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3 years ago

A. Complete and balance the following combination

Chemistry

1 answer:

Ipatiy [6.2K]3 years ago

7 0

Answer:

1. CO2

Explanation:

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PLEASE HELP I'M BEING TIMED!! Which type of star system has the most stars?

Liono4ka [1.6K]

Answer:

Hi! It's B - globular cluster

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3 years ago

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How many carbon atoms are there in a 1.3-carat diamond? diamonds are a form of pure carbon. (1 carat?

Colt1911 [192]

How many carbon atoms are there in a 1.3-carat diamond? Answer: 1.3 x 10^22 C atoms...
If a 1 carat = 0.20 g ... then 0.3 carat = 0.20 / 0.3 = 0.06 g
Thus, 1.3 carat = 0.26g
Find the moles first:
Moles= Grams / Mm of C
0.26 / 12.011 = 0.0216 mols of C
Atoms = Moles * Avogadro's number (6.022*10^23)
0.0216 * 6.022*10^23 = 1.3*10^22 C atoms

Hope this helps! :)

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3 years ago

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A dolphin travels a distance 20 miles up the coastline in 153 minutes.If 1 mile is equal to 1609 meters,then what is the dolphin

Afina-wow [57]

Answer:

The dolphins average speed is 3.51 $\frac{meters}{seconds}$

Explanation:

First of all, the following rules of three should be applied:

If 1 mile is equal to 1609 meters, 20 miles are equal to how many meters?

$distance=\frac{20 miles*1609 meters}{1 mile}$

distance=32,180 meters

If 1 minute is equal to 60 seconds, 153 minutes is equal to how many seconds?

$time=\frac{153 minutes*60 seconds}{1 minute}$

time= 9,180 seconds

Speed is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it. That is, speed implies the change of position of an object in space within a certain amount of time and is calculated as:

$speed=\frac{distance}{time}$

So in this case the velocity is calculated as:

$speed=\frac{32,180 meters}{9,180 seconds}$

Solving, you get:

Speed= 3.51 $\frac{meters}{seconds}$

The dolphins average speed is 3.51 $\frac{meters}{seconds}$

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3 years ago

Problem: Janna, a student of a chemistry class, told her friend that she learnt in class that bottled water is not pure. Kim, he

Ghella [55]

Answer:

The bottle is labeled pure so it probably is pure.

Explanation:

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3 years ago

Calculate the frequency of light having wavelength of 456 nm.

Lubov Fominskaja [6]

Answer:

Calculate the frequency of light having wavelength of 456 nm.

1.22*10^8nm

Explanation:

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2 years ago