All categories

3 years ago

How objects with different masses and volumes have the same density?

Chemistry

1 answer:

AURORKA [14]3 years ago

6 0

Answer:

mass and volume are independent. Two objects with the same volume can have different masses hence they can have different densities

Explanation:

The mass of atoms their size and how they are arranged determine the density

You might be interested in

02.01]In the 1800s, John Dalton's atomic theory was that atoms are indivisible. Later, subatomic particles such as neutrons, ele

Luda [366]

The last one is the correct answer. The atomic structure can be broken down which is what the findings concerning protons, electrons and neutrons showed. The theory was thus modified. What remained was no chemical reaction could affect the basic structure of an atom.

Still the last choice is still true. The first choice is your second best answer because of what I wrote in the last sentence of the above paragraph.

Last Choice <<<<< answer

8 0

3 years ago

Read 2 more answers

A non-mechanical, rigid, and fully insulated mixing tank is used to combine two inflows to produce wet steam. One inflow consist

Bogdan [553]

Explanation:

As it is given that stream A is super heated. From stream tables, we get that specific enthalpy, ( $h_{A}$ ) is 3054.29 kJ/kg.

For stream B, it is saturated water at 25 degree celsius. It's $h_{B}$ is 2546.54 kJ/kg.

Stream C, data will be as follows.

P = 200 kPa, $\chi$ = 0.9

So, $h_{c}$ = $h_{f} + \chi \times h_{fg}$

= 504.47 + 0.9 \times 2201.7

= 2486 kJ/kg

Now, energy balance formula will be as follows.

$m_{A}h_{A} + m_{B}h_{B}$ = $(m_{A} + m_{B})h_{c}$

$3 \times 3054.29 + m_{B} \times 2546.54$ = $(3 + m_{B}) \times 2486$

$m_{B}$ = 28.16 kg/s

Hence, inflow of saturated liquid is 28.16 kg/s. According to steam table, temperature of wet steam is $120.23^{o}C$

Mass flow rate of out flow is 31.16 kg/s.

7 0

3 years ago

Discuss in detail the role of various scientists in the discovery of electrons, protons and neutrons

levacccp [35]

Answer: The atom has three components the electrons, neutrons and protons.

Explanation:

J.J Thomson is responsible for the discovery of electron. He discovered the electrons while determining the properties of cathode rays in 1897. Rutherford is responsible for the discovery of proton during 1909 while performing the gold foil experiment. W. Bothe and H. Becker is credited to the discovery of neutrons.

4 0

3 years ago

The reaction betwen aluminum and iron (III) oxide can

Alona [7]

Answer : The mass of $Al_2O_3$ formed will be, 468.18 grams.

Solution : Given,

Mass of Al = 124 g

Mass of $Fe_2O_3$ = 601 g

Molar mass of Al = 27 g/mole

Molar mass of $Fe_2O_3$ = 160 g/mole

Molar mass of $Al_2O_3$ = 102 g/mole

First we have to calculate the moles of Al and $O_2$ .

$\text{ Moles of }Al=\frac{\text{ Mass of }Al}{\text{ Molar mass of }Al}=\frac{124g}{27g/mole}=4.59moles$

$\text{ Moles of }Fe_2O_3=\frac{\text{ Mass of }Fe_2O_3}{\text{ Molar mass of }Fe_2O_3}=\frac{601g}{160g/mole}=3.76moles$

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

$2Al+Fe_2O_3\rightarrow Al_2O_3+2Fe$

From the balanced reaction we conclude that

As, 2 mole of $Al$ react with 1 mole of $Fe_2O_3$

So, 4.59 moles of $O_2$ react with $\frac{4.59}{2}=2.295$ moles of $Fe_2O_3$

From this we conclude that, $Fe_2O_3$ is an excess reagent because the given moles are greater than the required moles and $Al$ is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of $Al_2O_3$

From the reaction, we conclude that

As, 2 mole of $Al$ react to give 2 mole of $Al_2O_3$

So, 4.59 moles of $O_2$ react to give $\frac{2}{2}\times 4.59=4.59$ moles of $Al_2O_3$

Now we have to calculate the mass of $Al_2O_3$

$\text{ Mass of }Al_2O_3=\text{ Moles of }Al_2O_3\times \text{ Molar mass of }Al_2O_3$

$\text{ Mass of }Al_2O_3=(4.59moles)\times (102g/mole)=468.18g$

Therefore, the mass of $Al_2O_3$ formed will be, 468.18 grams.

3 0

3 years ago

How many molecules are in one mole of each below.

max2010maxim [7]

We know, mole is a link between the mass of atoms or molecules and the number of atoms or molecules.
1 mole of atoms or molecules = 6.022 × 10^23 atoms or molecules.
This number is known as Avogadro Number named after the scientist Amedeo Avogadro.
So, the molecular formula of a substance represents 1 mole of molecules of that substance.
So, 1 mole of carbon monoxide (CO) contains 6.022 × 10^23.
Also, 1 mole of boron trihydride (BH3) contains 6.022 × 10^23.
Similarly, 1 mole of water (H20) contains 6.022 × 10^23.

Answer:

6.022 × 10^23

Hope you could understand.

If you have any query, feel free to ask.

5 0

3 years ago

How objects with different masses and volumes have the same density?​

How objects with different masses and volumes have the same density?