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Mazyrski [523]
3 years ago
10

What is the formula for finding volume of an object if you know its density and mass?

Chemistry
1 answer:
eimsori [14]3 years ago
4 0
Density equals mass times volume
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Does anyone know the answer to this chemistry question?!?
Pepsi [2]

Answer:

Mass of HCl = 73 g

Explanation:

Given data:

Mass of hydrogen = 2 g

Mass of HCl = ?

Solution:

First of all we will write the balance chemical equation:

H₂ + Cl₂   →  2HCl

Number of moles of hydrogen = 2 g/ 2g/mol

Number of moles of hydrogen = 1 mol

Form balanced chemical equation compare the moles hydrogen with HCl.

                   H₂    :   HCl

                    1      :    2

Mass of HCl:

Mass of HCl = number of moles × molar mass

Mass of HCl = 2 mol × 36.5 g/mol

Mass of HCl = 73 g

7 0
4 years ago
There are ______ electrons, _______ protons, and ______ neutrons in an atom of .
Georgia [21]

There are 54 electrons, 54 protons, and 78 neutrons in an atom of 132 Xe.54.

Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colourless, dense, odourless noble gas found in Earth's atmosphere in trace amounts.

Although generally unreactive, it can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.

Solid xenon changes from face-centred cubic (fcc) to hexagonal close packed (hcp) crystal phase under pressure and begins to turn metallic at about 140 GPa, with no noticeable volume change in the hcp phase. It is completely metallic at 155 GPa.

When metallized, xenon appears sky blue because it absorbs red light and transmits other visible frequencies. Such behaviour is unusual for a metal and is explained by the relatively small width of the electron bands in that state.

Full question :

Q. There are ________ electrons,_______ protons, and ______ neutrons in an atom of 132 Xe.54.

a) 78 78 132

b) 54 54 78

c) 54 54 132

d) 78 78 54

e)132 132 54

Learn more about Xenon here : brainly.com/question/124136

#SPJ4

7 0
2 years ago
A sample of gas in a sealed container (fixed volume) is heated from room temperature to 80.0°C.
inna [77]
Hello!

A) When the temperature inside the container increases, the pressure inside the container increases as well. 

An example for that is when you have an aerosol can and start heating it. The pressure of the gas inside the aerosol can will start to increase, and that would lead to the exploding of the can if heating is kept for too long. Bombs work on this principle too: The heat from the violent chemical reaction inside the closed compartment increase the pressure of the gases until the fragments are ejected at high velocities. 

B) The effect of temperature on the pressure of a gas illustrates Gay-Lussac's Law.

This law was formulated by the famous French chemist that gives it its name. It relates the expansion of a gas with the increase in temperature when the volume is left constant. The Gay-Lussac's Law can be expressed as follows, for the case of this exercise:

\frac{P1}{T1}= \frac{P2}{T2} \\ \\ P2= \frac{P1}{T1}*T2=P1* \frac{80 degC}{25degC}= P1*3,2

You can see that the factor that is multiplying P1 is higher than 1 for the case of heating from 25 °C to 80 °C, so the pressure will increase.

C) At a molecular level, when the temperature is raised the kinetic energy of the molecules inside the container will increase. This increase in the kinetic energy will cause the molecules to move faster, and to hit the walls of the container more often. This causes an increase in the pressure inside the container because there more hits means more force on the walls of the container, and that is the definition of pressure. 

Have a nice day!
8 0
3 years ago
Which reaction is an example of heterogeneous catalysis?
lesya692 [45]

Answer:

Explanation:

Industrial examples

Process Reactants, Product(s)

Ammonia synthesis (Haber–Bosch process) N2 + H2, NH3

Nitric acid synthesis (Ostwald process) NH3 + O2, HNO3

Hydrogen production by Steam reforming CH4 + H2O, H2 + CO2

Ethylene oxide synthesis C2H4 + O2, C2H4O

5 0
3 years ago
Explain why doesn’t the total pressure increase when more gas is added to the chamber?
german

Pressure is inversely proportional to volume. Therefore, the effect of pressure change is opposite to the effect of volume change. So when more gas is added to the chamber the total pressure of the chamber doesn't increase.

<h3>What are the different relations between pressure and volume?</h3>
  • As the volume changes, the concentrations and partial pressures of both reactants and products change.
  • As the volume decreases, the reaction shifts to the reaction side with fewer gas particles.
  • As the volume increases, the reaction shifts to the side of the reaction containing more gas particles.
  • As the pressure increases, the equilibrium shifts towards reactions with fewer moles of gas.
  • As the pressure decreases, the equilibrium shifts to the side of the reaction with higher moles of gas.
  • Moreover, the pressure change in the system due to the addition of the inert gas is not limited to this.

To know more about Pressure and Volume visit:
brainly.com/question/5018408

#SPJ4

4 0
2 years ago
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