Answer:
Pressure of dry gas = 722.6 mmHg
Explanation:
From the question given above, the following data were obtained:
Measured pressure = 745 mmHg
Water vapor pressure at 24.0 °C = 22.4 mmHg
Pressure of dry gas =?
The pressure of dry gas can be obtained as follow:
Measured pressure = pressure on dry gas + water vapor pressure
745 = pressure of dry gas + 22.4
Collect like terms
Pressure of dry gas = 745 – 22.4
Pressure of dry gas = 722.6 mmHg
Fill out the following regarding the element
Atomic Number
Atomic Mass
Number of Protons
Number of Electrons
Number of Neutrons
Answer:
1 is 84
2 is 218
3 is 84
4 is 84
5 is 134
1. For each of the following formulas:
1) if ionic, write the formulas of the ions; if covalent, draw the Lewis structure
2) For each covalent compound, describe the electronic and molecular geometry
3) For each covalent compound, describe the hybridization of the central atom
4) Name each compound, except the organic one.
5) How many sigma and how many pi bonds does each compound have?
MnSO4 CH3NH2 PCl5 O2 LiF
Answer:
See Explanation
Explanation:
The ionic compounds are; MnSO4 and LiF
The covalent compounds are; CH3NH2, PCl5 and O2
1) The formulas of the ions are;
MnSO4 - Mn^2+ SO4^2-
LiF - Li^+ F^-
The structure of each of the three covalent molecules is shown in the images attached to this answer.
2) CH3NH2 - Has a tetrahedral molecular geometry and electronic geometry
PCl5 - Has a trigonal bipyramidal molecular geometry and electronic geometry
O2 - Has a linear molecular geometry and electronic geometry.
3) CH3NH2 is sp3 hybridized
PCl5 is sp3d hybridized
O2 - is sp2 hybridized
4) MnSO4 - Manganese II sulphate
PCl5 - Phosphorus pentachloride
O2 - Oxygen molecule
LiF- Lithium fluoride
5) PCl5 - Five sigma bonds and no pi bond
CH3NH2 - 6 sigma bonds and no pi bond
O2 - 1 sigma bond and 1 pi bond
What occurs when a reaction reaches equilibrium?
1)The concentration of the reactants increases.
2)The concentration of the products increases
3)The rate of the forward reaction is equal to the rate of the reverse reaction
4)The rate of the forward reaction is slower that the rate of the reverse reaction.
Answer:
3)The rate of the forward reaction is equal to the rate of the reverse reaction
Answer:
The Rate of Forward Reaction is equal to the rate of the reverse reaction.
Explanation:
Hope this helps :)
Draw the major organic product in the reaction scheme. Be sure to clearly show stereochemistry (if applicable). The starting material is an alkyne where carbon 1 is bonded to cyclopentane and carbon 2 is bonded to H. Step 1 is N a N H 2. Step 2 is C H 3 I. Step 3 is sodium in liquid ammonia. Draw the major organic product.
Answer:
See answer below
Explanation:
The picture below will show you the final product and mechanism.
In the first step, the NaNH₂ is a strong base, so, this base will substract the hydrogen from carbon 2, to generate a negative charge there, and then, carbon 2 becomes a nucleophyle.
As a nucleophyle it will attack to the CH₃I in the next step, and it will attach to the CH₃.
The second step is just a regular step to reduce the triple bond of the alkyne to alkane or alkene, this will depend on the quantity of the reactant. In this case, an alkene.
Hope this helps,,,,,,k
Over a period of 30 days a student studied the night sky and recorded his observations. One night he watched a shooting star streak across the sky. His curiosity led him to list all the possible things it could be, then after researching, analyzing and comparing each, he proposed that which of the following was the most logical identification of a "shooting star? Answer F asteroid G comet H meteor J moon
Answer:
meteor
Explanation:
The most logical identification of a "shooting star" is a meteor. A meteor is basically any material from outerspace that falls to Earth. The main characteristic of a meteor is that from our point of view on the surface of the Earth it looks like a shooting star because we see a streak of light behind it. This light is simply dust and rock from the meteor burning up as it enters the Earth's atmosphere, leaving a "tail" of light behind it. Which to us looks like a shooting star.
Which of the following is true for a gas under conditions of very high pressure? (5
points)
1) PV > nRT, because the real volume of the gas would be more than the ideal
volume.
2) PV = nRT, because intermolecular forces are considerable at very high
pressures.
3) PV = nRT, because all gases behave as ideal gases at very high pressures.
04) PV = nRT, because the volume of the gas would become negligible.
Answer:
1) PV > nRT, because the real volume of the gas would be more than the ideal
volume.
Explanation:
According to the ideal gas equation; PV = nRT. Let us recall that this equation only holds under ideal conditions.
Gases exhibit ideal behavior under high temperature and low pressure. At higher pressure, the real volume of the gas is larger than the ideal volume of the gas.
Thus, at high pressure, PV > nRT, because the real volume of the gas would be more than the ideal volume.
Answer:
1) PV > nRT, because the real volume of the gas would be more than the ideal volume.
Explanation:
just took the test :)
Unlike homogeneous solutions, the
particles in a colloid are [?] and [ ]
through a semi-permeable membrane.
A
B
visible
invisible
Unlike homogeneous solutions, the particles in a colloid are Visible, and will pass through a semi-permeable membrane. The correct options are A. and A.
What are colloidal particles?Colloidal particles are the small and minute particles that are present in the solid. Their size is from 10 nano microns to greater than 10 microns. They are visible through a membrane.
There are four types of colloidal particles that are: sol, emulsion, foam, and aerosol. These particles are solid particles and examples are milk, mayonnaise, butter, etc.
The passing through and the visibility of the colloidal particles depends on the size of the pores. If the pore size is bigger it may not transfer, but if the size is small they can transfer through the membrane.
Thus, the correct option are A. Visible, and A. Will pass.
To learn more about colloidal particles, refer to the link:
https://brainly.com/question/11640006
#SPJ2
The question is incomplete. Your most probably complete question is given below:
A. Visible,
B. Invisible
A. Will pass
B. Will not pass
in writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
a.H
b.2H
c.H2
d.OH
Answer:
h2
Explanation:
A 251 ml sample of 0.45M HCl is added to 455 mL of distilled water. What is the molarity of the
final solution?
We are given:
251 mL sample of 0.45M HCl added to 455 mL distilled water
Whack a mole! (finding the number of moles):
We know that in order to find molarity, we use the formula:
Molarity = number of moles / Volume (in L)
so, number of moles is:
Number of moles = Molarity * Volume(in L)
now let's plug the values for the HCl solution to find the number of moles
Number of moles = 0.45M * 0.251 L
Number of moles = 0.113 moles
Time to concentrate (finding the final concentration):
Total final volume = 251 mL + 455 mL = 706 mL = 0.706 L
Number of moles of HCl = 0.113 moles
Molarity = Number of moles / Volume (in L)
Molarity = 0.113 / 0.706
Molarity = 0.16 M
___________________________________________________________
BONUS METHOD TIME!!!
We know the relation:
M1 * V1 = M2 * V2
where M1 and M2 are the initial and final molarities and V1 and V2 are initial and final volumes respectively
notice that I didn't mention that the volume has to be in Liters, that's because of the units being concerned with both sides of the equation, say I have the volume in mL and want to convert both these volumes to L, I would divide both sides by 1000, which would NOT change the overall value
Now, plugging values in this equation
(0.45) * (251) = (251 + 455)* (M2)
112.95 = (706)(M2)
M2 = 112.97/706 [dividing both sides by 706]
M2 = 0.16 Molar
A bowl containing 70 grams of water, is heated from 10 °C to 90 °C. The specific heat of
water is 4.184 J/gºC. How much heat energy is required to heat the water?
Answer:
23430.4 J.
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 70 g
Initial temperature (T₁) = 10 °C
Final temperature (T₂) = 90 °C
Specific heat capacity (C) = 4.184 J/gºC
Heat (Q) required =?
Next, we shall determine the change in the temperature of water. This can be obtained as follow:
Initial temperature (T₁) = 10 °C
Final temperature (T₂) = 90 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 90 – 10
ΔT = 80 °C
Finally, we shall determine the heat energy required to heat up the water. This can be obtained as follow:
Mass (M) = 70 g
Change in temperature (ΔT) = 80 °C
Specific heat capacity (C) = 4.184 J/gºC
Heat (Q) required =?
Q = MCΔT
Q = 70 × 4.184 × 80
Q = 23430.4 J
Therefore, 23430.4 J of heat energy is required to heat up the water.
mrs tuckers class is doing an experiment they fill up a cup with ice water they measure the temperature of both the water and the classroom after one hour . what will mrs tucker observe about the temperature of ice water after one hour
A. The temperature will increase
B. The temperature Will remain the same
C. The temperature will decrease greatly
D. The temperature Will decrease slightly
Answer:
Ofc D. bc if the temp decreases, that means it is getting colder u dummy! But if it increases, it is getting warmer.
Explanation:
I got it right on USATestprep for using common sense, mark me the brainliest.
All + HgCl, --------> AICI,
-AICI, + Hgl, balance equation then solve the problem
What mass, in grams, of All, is consumed when 138 grams of Hgl, is
produced? *
please help
Answer:
64.7g
Explanation:
The balanced chemical equation of this question is as follows;
AlI + HgCl2 → HgI + AlCl2
Based on the above equation, 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide).
Using mole = mass/molar mass to convert mass of HgI to moles.
Molar mass of HgI = 200.59 + 127
= 327.59g/mol
Mole = 138/327.59
= 0.42mol
- If 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide)
- Then 0.42 mol of HgI will be produced by 0.42mol of AlI.
Using mole = mass/molar mass
Mass = mole × molar mass
Molar mass of AlI = 27 + 127
= 154g/mol
Mass of AlI = 0.42 × 154
= 64.7g of AlI
what do adamantium,vibranium and unobtainum have in common
Answer:
they're all fake
Explanation:
Which of the following substances can be dissolved in pure water to give a basic solution?
Hydrogen chloride
Sodium bromide
Sodium hydroxide
Sodium chloride
I think it's sodium hydroxide
Explanation:
sodium hydroxide is a base
HCN
H:C:N:
3.
Is this Lewis Structure correct?
Answer:
No, your missing some bonds
How much heat must be absorbed by 375 grams of water to raise its temperature by 25 degrees Celsius? Specific heat for water= 4.184 J/g/C or K
Answer:
[tex]3.9*10^4 J[/tex]
Explanation:
See image for explanation!Answer:
[tex]\boxed {\boxed {\sf 39, 225 \ Joules}}}[/tex]
Explanation:
Since we are given the mass, temperature, and specific heat, we should use the following formula to calculate heat energy.
[tex]q=mc \Delta T[/tex]
We have 375 grams of water, the specific heat of water is 4.184 J/g ° C, and the temperature is raised 25 degrees Celsisus. Therefore:
m= 375 g c= 4.184 J/g °C ΔT= 25°CSubstitute the values into the formula.
[tex]q= (375 \ g)(4.184 \ J/g \textdegree C)(25 \textdegree C)[/tex]
Multiply the first two values together. The units of grams will cancel.
[tex]q=1569 \ J/ \textdegree C(25 \textdegree C)[/tex]
Multiply again. This time, the degrees Celsius cancel, so we are left with only the units of Joules.
[tex]q= 39225 \ J[/tex]
39,255 Joules of heat must be absorbed by the water.
What is the source of energy in nuclear weapons?
A. Combustion
B. Gravity
C. Fusion
D. Fission
What is the concentration of a solution with a volume of 0.900 L that contains 2.05 mol of iron (II) hydroxide?
Answer:
The concentration is 2.277
Explanation:
The formula for finding the concentration of a solution is C= mole of solute divided by the volume of the solution
Therefore, C= 2.05/0.900
C=2.277
If an acid has a pH of 2, what is its [H^ + ] ?
Show work
Check G the answer is up theree
How many moles of Carbon can be made from 6.37 moles of Iron?
Answer:
Percent yield = 57.7 %Explanation:
Is This An Igneous Rock Or Metamorphic Or Sedimentary?
Answer:
Metamorphic
Explanation:
Answer: thats metamorphic rock
At a certain temperature the vapor pressure of pure benzene is measured to be . Suppose a solution is prepared by mixing of benzene and of heptane . Calculate the partial pressure of benzene vapor above this solution. Round your answer to significant digits.
Answer:
P(C₆H₆) = 0.2961 atm
Explanation:
I found an exercise pretty similar to this, so i'm gonna use the data of this exercise to show you how to do it, and then, replace your data in the procedure so you can have an accurate result:
"At a certain temperature the vapor pressure of pure benzene (C6H6) is measured to be 0.63 atm. Suppose a solution is prepared by mixing 79.2 g of benzene and 115. g of heptane (C7H16) Calculate the partial pressure of benzene vapor above this solution. Round your answer to 2 significant digits. Note for advanced students: you may assume the solution is ideal".
Now, according to the data, we want partial pressure of benzene, so we need to use Raoul's law which is:
P = Xₐ * P° (1)
Where:
P: Partial pressure
Xₐ: molar fraction
P°: Vapour pressure
We only have the vapour pressure of benzene in the mixture. We need to determine the molar fraction first. To do this, we need the moles of each compound in the mixture.
To get the moles: n = m / MM
To get the molar mass of benzene (C₆H₆) and heptane (C₇H₁₆), we need the atomic weights of Carbon and hydrogen, which are 12 g/mol and 1 g/mol:
MM(C₆H₆) = (12*6) + (6*1) = 78 g/mol
MM(C₇H₁₆) = (7*12) + (16*1) = 100 g/mol
Let's determine the moles of each compound:
moles (C₆H₆) = 79.2 / 78 = 1.02 moles
moles (C₇H₁₆) = 115 / 100 = 1.15 moles
moles in solution = 1.02 + 1.15 = 2.17 moles
To get the molar fractions, we use the following expression:
Xₐ = moles(C₆H₆) / moles in solution
Xₐ = 1.02 / 2.17 = 0.47
Finally, the partial pressure is:
P(C₆H₆) = 0.47 * 0.63
P(C₆H₆) = 0.2961 atmHope this helps
A gas contained in a steel tank has a pressure of 1.5atm at a temperature of 320K. What will be the gas pressure when the temperature changes to 450K at a constant amount of gas and volume?
Answer:
2.109 atm
Explanation:
This is Gay-Lussac's Law when the temperature of a sample of gas in a rigid container is increased, the pressure of the gas increases as well. The increase in kinetic energy results in the molecules of gas striking the walls of the container with more force, resulting in a greater pressure. Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant. Gay-Lussac's Law is very similar to Charles's Law, with the only difference being the type of container.
So for this one:
[tex]\frac{P_{1} }{T_{1}} =\frac{P_{2} }{T_{2}}[/tex]
Rearrange it to
P2= (P1 x T2)/T1
P2= (450 x 1.5)/320 = 2.109 atm
Ice melts after adding heat. The free energy is ————— !
A. Exothermic
B. Not temperature dependent
C. Temperature dependent
D. Depended on how it is heated
E. React with active metals to form h2 gas
F. Endothermic
Examine the map of the United States. Tornadoes are most common in the Midwest and Great Plains states. According to the map, what causes the prevalence of tornadoes in these regions? A) Falling air currents form from the mixing of falling warm, moist air and the rising of cold air. B) Spinning air currents form from the mixing of rising warm, moist air and the falling of cold air. C) Spinning air currents form when cold, dry air becomes saturated with moisture and becomes unstable. Eliminate D) Rising air currents form from the deposition of cold air at the surface and moist air at the top of the troposphere.
Answer:
the answer is B-Spinning air currents form from the mixing of rising warm, moist air and the falling of cold air.
Explanation:
What is the molarity of a 750.0 milliliter solution containing 2.5 moles of solute?
ОА.
1.9 M
OB
0.0033 M
O c.
1,875 M
OD.
0.30 M
OE.
3.3 M
Molarity : It is defined as the number of moles of solute present in one liter of solution.
Therefore, the molarity of solution is 3.33
A. 1.9 M
B. 0.0033 M
C. 1,875 M
D. 0.30 M
E. 3.3 M
How many moles are in 3.72 x 10^27 atoms of iron?
Answer: There are [tex]0.617 \times 10^{4}[/tex] moles present in [tex]3.72 \times 10^{27}[/tex] atoms of iron.
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] atoms present in one mole of a substance.
Hence, moles present in [tex]3.72 \times 10^{27}[/tex] atoms are calculated as follows.
[tex]Moles = \frac{3.72 \times 10^{27}}{6.022 \times 10^{23}}\\= 0.617 \times 10^{4} mol[/tex]
Thus, we can conclude that there are [tex]0.617 \times 10^{4}[/tex] moles present in [tex]3.72 \times 10^{27}[/tex] atoms of iron.
The following are reactants in the chemical reaction shown below.
6CO2 + 6H2O --> C6H12O6 + 6O2
A. CO2 and H2O
B. C6H12O6 and O2
C. H2O and O2
D. CO2 and C6H12O6
Answer:
A
Explanation:
Reactants are on the right side of the chemical reaction
UV light can damage biological molecules because it has sufficient energy to break bonds within molecules. A carbon-carbon single bond typically requires 348 kJ/mol of energy to break it. What is the longest wavelength of light with energy sufficient to break this bond
Answer:
5.72 × 10⁻³¹ m
Explanation:
Step 1: Given and required data
Energy to break 1 mole of C-C single bonds (E): 348 kJPlanck's constant (h): 6.63 × 10⁻³⁴ J.sSpeed of light (c): 3.00 × 10⁸ m/sStep 2: Calculate the longest wavelength of light (λ) with energy sufficient to break this bond
We will use the Planck-Einstein relation.
E = h × c/λ
λ = h × c/E
λ = (6.63 × 10⁻³⁴ J.s) × (3.00 × 10⁸ m/s)/(348 × 10³ J) = 5.72 × 10⁻³¹ m
Do u believe that you are beautiful/handsome?
Yes or No?