Answer:
60N
Explanation:
You use the equation F=AM where F=Force A=Acceleration and M=Mass
You multiply the Acceleration (1.5) and the Mass (40) together and that gives you 60N as the force
b) The dilution equation works because the molarity remains the same.
c) The dilution equation works because the volume remains the same.
d) The dilution equation works because the number of moles remains the same.
Answer:
d) The dilution equation works because the number of moles remains the same.
Explanation:
Let’s say that you have 1 mol of a solute in I L of solution. The concentration is 1 mol·L⁻¹. and M₁V₁ = 1 mol.
Now, you dilute the solution to a volume of 2 L. You still have 1 mol of solute, but in 2 L of solution. The new concentration is 0.5 mol·L⁻¹.
The volume has doubled, but the volume has halved, and M₂V₂ = 1 mol.
b) Wrong. The molar concentration changes on dilution.
c) Wrong. The volume changes on dilution.
a) Wrong, although technically correct, because if the moles don’t change, the mass doesn’t change either. However, the formula M₁V₁ has units mol·L⁻¹ × L = mol. Thus, in the formula, it is moles that are constant.
The dilution equation work M1V1 =M2V2 work because the number of moles of solute remains the same.
Dilution refers to the addition of solvent such as water to a solution. When dilution is done the amount of solute is not affected but the amount of solvent increases while the concentration decreases.
It is the opposite of dilution where by a solvent is removed from a solution thereby increasing the concentration of the solute.
The dilution equation is given by;
M1V1=M2V2
Where M1 is the initial concentration of the solution
V1 is the initial volume of the solution
M1 is the concentration of the new solution
V1 is the volume of the new volume
Initial solution
The initial solution before dilution is called the stock solution. It is the solution before dilution process is done.
Final solution is called the diluted solution. It is the solution obtained after the process of dilution.
Since dilution involves addition of solvent, then the amount of solvent in this case water increases , the amount of solute remains constant while the concentration of solute decreases.
Keywords: Dilution, dilution equation, stock solution, diluted solution.
Dilution: brainly.com/question/3203632
Dilution equation: brainly.com/question/7208939
Application of dilution equation; brainly.com/question/7208939
Level: High school
Subject: Chemistry
Topic: Mole
Sub-topic: Dilution
The statement is False, because compound made up of elements which may have different properties. water is made up to oxygen i.e. gas and hydrogen which is also a gas, while water is a liquid and a good solvent.
Water can be amphoteric in nature, as it act as both acid as well as a base, highly viscous in nature due to the force of attraction exists between molecules.
Water can be used in Redox reaction as it help to get dihydrogen molecules quite easily, the dielectric constant of water is also high, form many different connections and attachments with other chemical compounds known as hydrates.
A substance show the normal behavior when it reacting to heat, like that compounds expand after exposed to heat and decreasing their density, and after some time their density increases, and matter contracts when cooled, while in case of water this property is opposite.
Below the temperature of 4 degrees Celsius the water behaves ordinarily, however when it is cooled further, its unusual properties are being observed.
when water cooled, the density slowly increases, further cooled down leads to decrease in the density of water and the matter expands, which is called as the anomalous property of water occurs between temperatures of 4 degrees Celsius to 0 degrees Celsius.
Learn more about water, here:
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Answer: it's a and D
Explanation:
Just answered it and got it right
Scientist use models to study atoms because you cannot either see or perceive directly what do atoms look like.
Models permit to explain in a simplified way how the atoms are constituted, and, so, figure out how they behave and how they are the bulding blocks of the matter (elements and compounds).
A model can be a drawing or structure with balls and sticks, which show in an idealized way what an atom is.
Since the scientists have discovered different facts about the atoms along the last 200 years the models of the atoms have also evolved.
The plum pudding model of the atom proposed by JJ Thompson was different of the nuclear model proposed by Rutherford, and Rutherford's was different from the planetary model proposed by Bohr, and this is different from the quantum model.