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lesantik [10]
4 years ago
7

Forces put things in motion. True or False

Chemistry
2 answers:
yanalaym [24]4 years ago
3 0

Its true have you seen wind when it moves an object? wind is a force and it can move an object like paper also water if water hits a person like a river a wild river can move a person

sweet-ann [11.9K]4 years ago
3 0
True because force is force so therefor it helps an object move in motion and motion is movement
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A mixture of methane and krypton gases is maintained in a 8.99 L flask at a pressure of 1.68 atm and a temperature of 46 °C. If
sweet-ann [11.9K]

Answer:

22.81 g

Explanation:

Given that:

Pressure = 1.68 atm

Temperature = 46 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T = (46 + 273.15) K = 319.15 K

Volume = 8.99 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

1.68 atm × 8.99 L = n × 0.0821 L.atm/K.mol × 319.15 K

<u>⇒n = 0.5764 moles </u>

Given that :

Amount of methane = 4.88 g  

Molar mass = 16.04 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{4.88\ g}{16.04\ g/mol}

Moles= 0.3042\ mol

<u>Moles of Krypton = Total moles - Moles of methane = 0.5764 - 0.3042 moles = 0.2722 moles</u>

Also, Molar mass of krypton = 83.798 g/mol

So,

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

0.2722\ moles=\frac{Mass}{83.798\ g/mol}

<u>Mass of krypton = 22.81 g</u>

6 0
3 years ago
The law of reflection states that the angle of incidence and the angle of reflection are always
cestrela7 [59]

Answer:

The law of reflection states that the angle of incidence and the angle of reflection are always equal.

6 0
3 years ago
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When the reaction h3po4(aq) ca(oh)2(aq)→ occurs what is the formula for the salt formed?
Georgia [21]
2H3PO4 + 3Ca(OH)2 ➡ Ca3(PO4)2 + 6H2O.

Hence salt formed is Ca3(PO4)2.
Hope this helps, have a nice day!
7 0
3 years ago
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Which is most likely to change with new discoveries and technologies?
nikdorinn [45]

Answer: the employment rate will go down  and more people will be more lazy

Explanation:...

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