Answer:
V = 25.7 L
Explanation:
To find the volume of Argon (Ar), you need to use the Ideal Gas Law equation. This looks like:
PV = nRT
In this formula,
> P = pressure (atm)
> V = volume (L)
> n = number of moles
> R = constant (0.0821 L*atm/K*mol)
> T = temperature (K)
While there is a different constant that can be used if you want to keep the pressure in mmHg, there is a more common constant used when the pressure is in atm. So, to find the volume, you need to (1) convert mmHg to atm (by dividing by 760) and then (2) calculate the volume (using Ideal Gas Law).
(Step 1)
600 mm Hg 1 atm
------------------- x --------------------- = 0.789 atm
760 mm Hg
(Step 2)
PV = nRT
(0.789 atm) x V = (0.825 mole)(0.0821 L*atm/K*mol)(300 K)
(0.789 atm) x V = 20.32
V = 25.7 L
Given the balanced equation representing a
reaction:
2H₂ + O₂ → 2H₂O + energy
4. Which mass of oxygen completely reacts with
4.0 grams of hydrogen to produce 36.0 grams of
water?
(1) 8.0 g
(2) 16.0 g
(3) 32.0 g
(4) 40.0 g
Answer: it would be number 3, 32.0g
Heat _____.
can only betransferredif molecules are touching
is always created by friction
is a type of potential energy
is the same as temperature
Rosalind franklin helped discover the structure of what molecule?.
That would be...*drumroll* the structure of DNA!
Find the magnetic force experienced by a proton moving with the speed of 3 × 105 m/s in the magnetic field B of magnitude 6 × 10-5 T.
The magnetic force experienced by a proton moving with a speed of 3 ×[tex]10^{5}[/tex] m/s in the magnetic field B of magnitude 6 ×[tex]10^{-5}[/tex] T will be 2.88×[tex]10^{-18}[/tex] N.
Magnetic force can be defined as the attraction or repulsion force that arises between electrically charged particles due to the motion of the charged particles.
Given,
Speed = 3×[tex]10^{5}[/tex] m/s
Magnetic Field, B= 6 ×[tex]10^{-5}[/tex] T
Magnetic force is the product of velocity, the charge of a proton, and the magnetic field present there.
The magnetic force can be represented as:
F=qvB
F=1.6×[tex]10^{-19}[/tex]×3×[tex]10^{5}[/tex] ×6 ×[tex]10^{-5}[/tex]
F=2.88×[tex]10^{-18}[/tex] N
Hence, the magnetic force experienced by the proton will be 2.88×[tex]10^{-18}[/tex] N.
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Why does carbonic acid gives an acid salt but hydrochloric acid does not?
Answer:
Solution. Carbonic acid is a dibasic acid with two replaceable hydrogen ions; therefore it forms one acid salt or one normal salt. Hydrochloric acid is a monobasic acid with one replaceable hydrogen ion and so forms only one normal salt.
Explanation:
The theoretical yield of silver was
determined at 241 g Ag through
calculation. Instead, the reaction
generated only 192 g Ag. What is the percent yield of the reaction?
2AgNO3 + Zn → 2Ag + Zn(NO3)2
[?] %
Answer:
79.7%
Explanation:
Percentage yield = (actual yield/theoretical yield)*100%
Therefore percentage yield for this experiment is: [tex]\frac{192}{241} *100%[/tex]%
[tex]= 0.79668*100[/tex]%
Percentage yield = 79.668%
Rounded to 3 significant figures is 79.7%
Hope this helped!
Use the periodic table to answer the following questions.
What is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium?
Be > Ca > Mg > Sr
Be > Mg > Ca > Sr
Ca > Sr > Be > Mg
Sr > Ca > Mg > Be
From the highest to lowest Ionization Energies for beryllium, calcium, magnesium, and strontium, the order is: Be > Mg > Ca > Sr
How to use the periodic table?Ionization energy is defined as a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to give off an electron.
Now, ionization energy usually decreases as it descends in a group. Thus, from the highest to lowest for beryllium, calcium, magnesium, and strontium, the order is determined as:
Be > Mg > Ca > Sr
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Answer: B (BE > MG > CA > SR)
Explanation: ON EDGE
determine the enthalpy change when 7.08g of Ag is obtained. use the abbreviated form of the unit in your answer.
2AgBr(s) -> 2Ag(s) + Br2(l) deltaH = -220kJ
2AgBr(s) ⇒ 2Ag(s) + Br₂(l) ΔH = -220kJ ⇒ for 2 mol Ag
mol Ag = 7.08 : 108 g/mol = 0.065
the enthalpy change = 0.065/2 x -220 kJ = -7.15 kJ
Which of the following reactions depicts a synthesis reaction?
Answer:
C combination reaction (synthesis) reaction
Explanation:
two chemicals are combined
If 0.889J of heat causes a 0.124 degree C temperature change, what mass of water is present?
0.889 ÷ 4187 ÷ 0.124 = 0.00171
The volume of a gas is inversely proportional to the pressure of a gas is known as:.
Answer:
Boyle's law states this.
What is the name of this hydrocarbon?
hexane
O heptane
O octane
O pentane
Mark this and return
H H H H H
|||||
H-C-C-C-C-C-H
|||II
H H H H H
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Answer:
alkanes alkens alkenes and a bromatic hydrocarbons
Answer:
[tex]\huge\boxed{\sf Pentane}[/tex]
Explanation:
The given compound has:5 carbonsall single bondsPrefix for 5 carbons = Pent
Suffix for all single bonds = ane (since the compound is alkane)
So, the name of this hydrocarbon is:
Pentane[tex]\rule[225]{225}{2}[/tex]
Considering the combustion reaction of propane again, what mass of propane (C3Hg) is necessary to react with 4.53 g of oxygen? C3H8 +5023CO₂ + 4H₂O 0.0256 g C3H8 1.13 g C3H8 1.25 g C3H8 2.50 g C3H8
Answer:
1.25 g C3H8
Explanation:
edge lol
what are the benefits of organic farming
How many grams of nitrogen,
N2, would be required to react with
6.25 moles hydrogen, H2?
N₂ + 3H₂ → 2NH3
[?] g N₂
Answer: 29.2
Explanation:
From the coefficients of the equation, we know that for every 3 moles of hydrogen consumed, 1 mole of nitrogen is consumed.
This means we would need 6.25/3 = 2.0833333333333 mol of nitrogen.
Nitrogen has an atomic mass of 14.007 g/mol, so 2.0833333333333 moles of nitrogen have a mass of (14.007)(2.0833333333333) = 29.2 g (to 3 sf)
Calculate the percent covalent character of a chemical bond between iodine and lithium.
Answer:
27966692
Explanation:
I don't know if this is right or not
What is the mass percent of Fe in iron(II) chloride
What happens is the PH changes
The changes in different properties such as concentration etc will change if the pH experiences a change.
What is pH?
This is referred to the power of hydrogen and is a measure of the degree of acidity or alkalinity of a substance.
When pH changes, the concentration as well as other properties in this context.
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What is the change in freezing
point, ATf, when the 0.195 m
aqueous solution of K2S dissolves
into 3 particles?
The change in the freezing point of the solution is 1.1°C.
What is freezing point depression?The freezing point depression is a colligative property thus we must take note of the number of particles in solution.
Using;
ΔT = k m i
k = 1.86 °C/m
m = 0.195 m
i = 3
ΔT = 1.86 °C/m * 0.195 m * 3
ΔT = 1.1°C
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Answer:
1.0881
Explanation:
Correct answer for Acellus
Why did mendeleev leave blank spaces in his version of the periodic table?.
Explanation:
Answer:
Mendeleev left blank spaces in his version of the periodic table because he left the gaps to place elements not known at the time
You examine an ice core sample from 10,000 years ago when global temperatures were unusually high. Based upon past studies and insights from current GHG levels, we expect that atmospheric levels of carbon dioxide Group of answer choices were high but methane levels were low. and methane were unusually low. and methane were unusually high. were low but methane levels were high.
Methane was unusually high is the correct option. Hence, option B is correct.
What is methane?Methane is the simplest member of the paraffin series of hydrocarbons and is among the most potent greenhouse gases. Its chemical formula is [tex]CH_4[/tex].
As the ice compacts over some time, tiny bubbles of the atmosphere or surroundings including greenhouse gases like carbon dioxide and methane—press inside the ice. These air pocket “fossils” give samples of what the atmosphere was kind when that layer of ice formed.
Based upon past studies and insights from current GHG levels, we assume that atmospheric levels of carbon dioxide and methane were unusually low.
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: 2NaOH + H,S0A - Na,SO A + 2H,0 How many moles of sodium sulfate (Na,SO,) reproduced when 5.0 moles of sodium hydroxide (Na0H) are reacted with excess sulfuric acid? A 2.5 moles B 1.0 moles C 5.0 moles D 2.0 moles
From the reaction, we can see that the number of moles produced is 2.5 moles of Na2SO4
What is a reaction?Chemical reaction involves the combination between two or more species. In this case, the reaction equation is; 2NaOH + H2S04 ----> Na2SO4 + 2H20.
Now we are told that sulfuric acid is in excess hence NaOH is the limiting reactant.
If 2 moles of NaOH produces 1 mole of Na2SO4
5 moles of NaOH produces 5 moles * 1 mole/ 2 moles
= 2.5 moles of Na2SO4
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What type of molecule is pentanal?
o a. aldehyde
o b. ester
o c. ketone
o d. alcohol
Answer:
aldehyde
Explanation:
it ends with "al" of "al"dehyde, always check the end
An unidentified element has one electron in the outer most shell. Explain what
characteristics you would expect this element to have? Your response should include
three or four sentences
Answer:
They are unstable as single atoms, but can become stable by losing or sharing their one valence electron.
Explanation:
hope it helps you and give me a brainliest
How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
O 1 mol of oxygen has fewer molecules.
O 1 mol of oxygen has more molecules.
O Each sample has the same number of molecules.
O The molecules cannot be compared without knowing the mass.
Mark this and return
4
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Subinit
Answer:
Each sample has the same number of molecules.
Explanation:
This is true by Avogadro's law.
Answer this please!!!
Answer:
c
Explanation:
The answer is both i and iii.
What is the si unit that refers to the number of particles contained in a substance.
Answer:
one mole contains exactly 6.022 14076 into 10 23 elementary this number is the fix numerical value of the evandi and the constant and a b where expects in the unit mol - 1 is called the abacation number that amount of substance of a system is measured of the number specific
What will be the next step in this calculation?
V = 2.188x10^6 x 2
————————
3
V = Answer
————
3
V = (what you got)
Try finding them with calculator or something.
Hope this helps.Good luck ✅.And I wish this can still help.If you have half a mole of octane (c8h18), how much water is produced? 2c8h18 + 25o2 --> 16co2 + 18h2o
Answer:
4.5 moles H₂O
or
81.072 g H₂O
Explanation:
I am not exactly sure whether you want moles H₂O or grams H₂O. So, I'll calculate both. To find the moles H₂O, you'll need to covert moles C₈H₁₈ to moles H₂O via the mole-to-mole ratio from the reaction coefficients. To find the grams H₂O, you need to convert moles H₂O to grams H₂O via the molar mass.
2 C₈H₁₈ + 25 O₂ ---> 16 CO₂ + 18 H₂O
0.5 mole C₈H₁₈ 18 moles H₂O
----------------------- x ------------------------- = 4.5 moles H₂O
2 moles C₈H₁₈
Molar Mass (H₂O): 2(1.008 g/mol) + 16.00 g/mol
Molar Mass (H₂O): 18.016 g/mol
4.5 moles H₂O 18.016 g
---------------------- x ---------------- = 81.072 g H₂O
1 mole
It requires 2,500 joules to raise a certain amount of water (c = 4.186 j/g°c) from 20.0°c to 60.0°c. what is the mass of the water that is being heated? 15 g 40 g 63 g 80 g
Answer:
15 grams of water will absorb 2,500 Joules in going from 20.0 to 60.0 C.
Explanation:
The heat involved in raising a mass (m) of a substance with a specific heat (c) from one temperature to another (Delta T) is given by:
Heat = mc(Delta T)
2,500 Joules = m*(4.186J/gC)*(60C-20C)
2,500 Joules = m*(4.186J/gC)*(40C)
2,500 Joules = m*(4.186J/gC)*(40C)
m = (2,500J)/(4.186*40J/g)
m = 14.93 grams
Answer: B (15g)
Explanation:
