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likoan [24]
3 years ago
15

Why are the marked lines on a beaker like this useful for measuring the volume of a liquid? A liquid maintains its shape in the

beaker, so the beaker can measure the liquid’s height, and the height cubed equals the liquid’s volume. A liquid conforms to the circular area of the beaker, and this area multiplied by the liquid’s height equals its volume. A liquid is usually made of neutral atoms, and the beaker does not add or remove energy from the atoms, thereby preventing ionization. A liquid is compressible, but since the beaker does not have a top on it, the liquid will maintain its same volume THE ANSWER IS (B)
Chemistry
2 answers:
pshichka [43]3 years ago
4 0
Answer : Option B) <span>A liquid conforms to the circular area of the beaker, and this area multiplied by the liquid’s height equals its volume.

Explanation : When a liquid is poured into a beaker the liquid takes the internal shape of the beaker which is circular in shape, according to the markings on the beaker one can measure approx quantity of fluid required and perform the experiment. The area of circular of the beaker when multiplied with height of liquid gives the total volumes of fluid present in it.

</span>
Natali [406]3 years ago
4 0

Answer:

B

Explanation:

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In one process, 6.05 kg of caf2 is treated with an excess of h2so4 and yields 2.85 kg of hf. calculate the percent yield of hf.
Kobotan [32]
 The %  yield  of Hf  is  91. 8%


calculation

% yield =  actual mass/ theoretical mass  x100
actual mass = 2.85 Kg

calculate the theoretical  mass
by first  write the equation for reaction

CaF2  +H2SO4  → 2HF  + CaSO4
find  the  moles  of CaF2  used
moles = mass/molar mass
mass = 6.05Kg   = 6.05 x1000 =6050 Kg
molar mass  of CaF2  =  40 + (19 x2) = 78 g/mol

moles= 6050/ 78 = 77.6 moles

by  use  of mole ratio between  CaF2  to HF  which  is  1:2 the  moles of HF is therefore = 77.6 x2 =155.2  moles of Hf

find the  theoretical mass  of HF = moles x  molar mass ( 1 +19=20g/mol)

=   155.2  moles x 20 g/mol = 3104 grams  = 3104 /1000 = 3.104 Kg

The % yield  is therefore  = 2.85 Kg/ 3.104 Kg x100 =  91.8%

8 0
4 years ago
How do the following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction:
mr Goodwill [35]

Answer:

A. increase equilibrium constant                    

B. decrease equilibrium constant

A. increase equilibrium constant

C. no effect

B. decrease equilibrium constant

Explanation:

5 0
3 years ago
If a solution has a pH = 3, and another solution has a pH = 5, in terms of acidic strength, how many times weaker is the second
scoray [572]
I think they might have the answer online
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3 years ago
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Given the general chemical equation 3A + 2B → C + 5D,
Irina-Kira [14]

Answer :

(a) The number of moles of D produced can be, 6.67 moles.

(b) The volume of D prepared can be, 24.5 L

Explanation :

The given chemical reaction is:

3A+2B\rightarrow C+5D

Part (a) :

From the balanced chemical reaction, we conclude that:

As, 3 moles of A react to give 5 moles of D

So, 4 moles of A react to give \frac{5}{3}\times 4=6.67 moles of D

Thus, the number of moles of D produced can be, 6.67 moles.

Part (b) :

As we know that 1 moles of substance occupies 22.4 L volume of gas.

As, 2\times 22.4L volume of B gives 5\times 22.4L volume of D

As, 9.8 L volume of B gives \frac{5\times 22.4L}{2\times 22.4L}\times 9.8L=24.5L volume of D

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4 0
3 years ago
PLS HELP ME ON MY FINAL MULTIPLE CHOICE
dexar [7]

Answer:

The force would decrease

5 0
3 years ago
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