The density formula is:
density=mass/volume.
d=3.5g/2cm^3
d=1.75 g/cm^3
The density of the sample is 1.75 g/cm^3.
Colligative
properties calculations are used for this type of problem. Calculations are as
follows:<span>
ΔT(freezing point) = (Kf)m
ΔT(freezing point)
= 1.86 °C kg / mol (0.50 mol/kg)
ΔT(freezing point) = 0.93 °C
Tf - T = 0.93 °C
<span>T = -0.93 °C</span></span>
Answer:
The area is 2.5 m²
Explanation:
Step 1: Data given
A car has a 25 m² hydraulic lift platform that weighs 15000 N
The smaller piston required a force to lift = 1/100 its weight
Step 2: Calculate the area of the smaller piston
Pressure = Force / Area
F1 / A1 = F2 / A2
⇒ with F1 = weight of the hydraulic lift = 15000 N
⇒ with A1 = area of the hydraulic lift = 25 m²
⇒ with F2 = 1/100 of it's weight = 1500 N
A2 = F2 / (F1/A1)
A2 = 1500 ( 1500/25)
A2 = 2.5
The area is 2.5 m²
Well, Mendeleev's Period Table is truly a genius discovery. Some say that he thought of it during his sleep.
It's also sometimes called a Periodic Table. Periodic Table helps to organize all of the elements based on their properties, and much more. It also includes a lot of important stuff, such as atomic masses.
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The rate t1 shows the beginning of the reaction, the t2 shows an intermediate point in the reaction, and t3 shows almost the end of the reaction.
<h3>What is the reaction rate?</h3>
Reaction rate refers to how fast or slow a chemical reaction is completed. In other words, the velocity at which reactants transform into products.
<h3>What does T1 show?</h3>
At this point the reaction is just starting, this shows:
- There is a small volume of oxygen (product).
- The reaction rate is increasing.
<h3>What does T2 show?</h3>
At this point, we can conclude:
- There is a higher volume of the product.
- The rate of the reaction has significantly increased since T1.
<h3>What does T3 show?</h3>
At this point, we can conclude:
- Most of the reaction has already occurred because the maximum product volume has been reached.
- It is expected the reaction rate decrease as the reaction is about to finish.
Learn more about chemical reactions in: brainly.com/question/6876669