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nikklg [1K]
2 years ago
6

Explain how you would calculate the density of a substance. Include a solution map in your explanation.

Chemistry
1 answer:
horrorfan [7]2 years ago
8 0
Density = mass/volume again, density is the ratio of mass to volume.
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Distinguish between monopoly and monopolistic competition
blondinia [14]

Answer:

<u>○</u><u>MONOPOLY</u><u> </u><u>○</u>

○1▪︎Monopoly is the type of imperfect competition where a seller or producer captures the majority of market share due to lack of substitutes or competitors.○

○2▪︎Nil competition exists as only one seller present in the market.○

<u>○</u><u>MONOPOLISTIC</u><u> </u><u>○</u>

○1▪︎Monopolistic competition is a type of imperfect competition where many sellers try to capture market share by differentiating their products.○

○2▪︎Very high competition exists as there are many sellers.○

7 0
3 years ago
What volume is occupied by a 0.118 mol of helium gas at a pressure of 0.97 atm and a temperature of 305 K ? Would the volume be
Naddika [18.5K]

Answer:

See below

Explanation:

PV = n RT        R = .082057  L - Atm / (K-Mole)

.97 V = .118 (.082057)(305)    

    V = 3.04 liters

Will not change for argon.....will be the same for all ideal gases

5 0
2 years ago
Explain why Ra is larger than Be. With 2 points.
igor_vitrenko [27]

Explanation:

<h2>Radium(Ra)=> </h2>

atomic number=88

<h2>BERYLLIUM (Be)=></h2>

atomic number =4

why is Ra larger than Be

<h3>1. since the atomic number of Ra is greater than Be, the number of electrons is more, which means there are more number of shells present in Ra than Be. </h3><h2>(atomic Radius)</h2>

<h2>2. the more the valence electron (excluding fully filled ones) the less is the nuclear attraction force</h2><h3>since Ra has more valence electron in its outermost shell, the nuclear attraction force is less which means that Ra 's size is greater than Be.</h3>

hope it helps:)

6 0
3 years ago
how many liters of O2 are needed to produce 5.62 g of SO2 in the following reaction? 4FeS2+11O2 -&gt;2Fe2O3+8SO2
Liula [17]

8moles of SO_2 need 11mol O_2

  • 1mol need=11/8=1.4molO_2

Moles of sO_2

\\ \rm\hookrightarrow \dfrac{5.62}{64}=0.1

So

Moles of O_2

  • 1.4(0.1)=0.14mol

We know

  • 1mol at STP=22.4L
  • 1.4mol=0.14(22.4)=3.13L O_2
5 0
3 years ago
You need a 30% alcohol solution. On hand, you have a 200 mL of a 10% alcohol mixture. You also have 55% alcohol mixture. How muc
Art [367]

Answer: 160 ml

Explanation:

The expression used will be :

C_1V_1+C_2V_2=C_3V_3

where,

C_1 = concentration of Ist alcohol solution= 10%

C_2 = concentration of 2nd alcohol solution= 55%

V_1 = volume of Ist alcohol solution = 200 ml

V_2 = volume of  2nd alcohol solution= v ml

C_3 = concentration of resulting alcohol solution= 30%

V_2 = volume of resulting alcohol solution= (v+200) ml

Now put all the given values in the above law, we get the volume of added.

(10\times 200)+(55\times v)=(30\times (v+200)ml)

By solving the terms, we get :

v=160ml

Therefore, the volume of 55% mixture  needed to be added to obtain the desired solution is 160 ml.

5 0
3 years ago
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