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kkurt [141]
4 years ago
13

Suppose you were calibrating a 100.0 ml volumetric flask using distilled water. the flask temperature was at 20°c, and you assum

ed that the distilled water was as well. however, you later discover that the actual water temperature was 12°c instead. how is the mass of the 100.0 ml of distilled water you measured at 12°c different from the mass of 100.0 ml of distilled water at 20°c?
Chemistry
1 answer:
kicyunya [14]4 years ago
4 0
The density of water at 12°C is lower than the density of water at 20°C.

Now density is related to volume as per: density = mass / volume =>

mass = volume * density.

So, the greaer the density the higher the mass of the same volume of water.

Therefore, 100.0 ml of water at 12°C has a mass greater than 100.00 ml of water at 20 °C.
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F
Katarina [22]

The statement is true in this situation is C. The size of Ffric is the same as the size of Fapp:

From the diagram, since the body is in equilibrium, the sum of vertical forces equals zero. Also, the sum of horizontal forces equal zero.

So, ∑Fx = 0 and ∑Fy = 0

Since Fapp acts in the negative x - direction and Ffric acts in the positive x - direction,

∑Fx = -Fapp + Ffric = 0

-Fapp + Ffric = 0

Fapp = Ffric

Also, since Fgrav acts in the negative y - direction and Fnorm acts in the positive y - direction,

∑Fy = Fnorm + (-Fgrav) = 0

Fnorm - Fgrav = 0

Fnorm = Fgrav

So, we see that the size of Fapp <u>equals</u> size of Ffric and the size of Fnorm <u>equals</u> the size of Fgrav.

So, the correct option is C

The statement which is true in this situation is C. The size of Ffric is the same as the size of Fapp.

Learn more about equilibrium of forces here:

brainly.com/question/12980489

5 0
2 years ago
How does activation energy affect a chemical reaction ?
PilotLPTM [1.2K]

Enzymes affect the rate of the reaction in both the forward and reverse directions; the reaction proceeds faster because less energy is required for molecules to react when they collide. Thus, the rate constant (k) increases. Figure 3: Lowering the Activation Energy of a Reaction by a Catalyst.

hope this helps!

(:

3 0
3 years ago
Read 2 more answers
How many moles of NaOH are contained in 27 mL of 0.15 M NaOH? (Atomic mass: Na=23 u , O =16 u , H =1 u) *
Strike441 [17]
5 plus pointed it should give you 60.21
6 0
3 years ago
Which has not been a major source of CFCs
ipn [44]

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4 0
4 years ago
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The model of the atom where the central core contains protons and neutrons surrounded by a cloud of electrons is best described
WITCHER [35]
I am thinking the answer is B. I think this because Bohr had a model similar, but his was lacking the cloud of electrons. His just had electrons orbiting the nucleus. 
I hope this is right!<span />
4 0
3 years ago
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