Answer:
The cell is in a Hypotonic solution. When a cell is in a Hypotonic solution the lower osmotic pressure causing water to move across the pressure gradient into the solution causing the cell to shrivel.
Answer:
9.1 KJ
Explanation:
First we must find the number of moles of HBr involved;
number of moles of HBr= mass of HBr/ molar mass of HBr
But molar mass of HBr= 80.91 g/mol
Given mass of HBr from the question= 20.1g
Hence;
Number of moles of HBr= 20.1 g/80.91g
Number of moles of HBr= 0.25 moles of HBr
If 2 moles of HBr has a heat of formation of 72.80KJ
Then 0.25 moles of HBr will have a heat of formation of 0.25× 72.80/2= 9.1 KJ
Therefore; 20.1 g of HBr will have a heat of formation of 9.1 KJ
Answer:
The volume of the sheet metal = 0.58 cm³
<em>Note: The question is incomplete. A similar complete question is given below:</em>
<em>a 7.50 g piece of metal was rolled into a thin sheet measuring 24.0 cm × 30.0 cm</em>
<em>the density of the metal is 12.86 g/cm</em>
<em>calculate the volume of the sheet of metal</em>
Explanation:
The mass of a substance is the quantity of matter present in that substance
The volume of a substance is amount of space the substance occupies
Density of a substance is the ratio of its mass and the volume it occupies. It is a measure of how compact a body is.
From definition above;
Density = mass/volume
Therefore, volume = mass/density
mass of thin sheet = 7.50 g
density = 12.86 g/cm³
Volume = 7.50 g / 12.86 gcm⁻³
Volume = 0.58 cm³
Therefore, the volume of the sheet metal = 0.58 cm³
A model of an atom is much bigger than a real atom, but the model of the solar system is obviously much smaller.
I believe the correct answer from the choices listed above is option B. Sugar stirred in tea <span> is an example of a solution. A solution is a mixture that exhibits homogeneous properties all throughout the mixture. Hope this answers the question. Have a nice day.</span>