The new pressure is 1.08 atm
Gas lawsFrom the question, we are to determine the new pressure
Using the General gas equation,
[tex]\frac{P_{1}V_{1} }{T_{1}} = \frac{P_{2}V_{2} }{T_{2}}[/tex]
Where
P₁ is the initial pressure V₁ is the initial volumeT₁ is the initial temperature P₂ is the final pressure V₂ is the final volume T₂ is the final temperatureFrom the given information,
P₁ = 1.5 atm
V₁ = 15 L
T₁ = 105 C = 105 + 273.15 = 378.15 K
V₂ = 25 L
T₂ = 181 C = 181 + 273.15 = 454.15 K
P₂ = ?
Putting the parameters into the equation, we get
[tex]\frac{1.5 \times 15}{378.15} = \frac{P_{2} \times 25 }{454.15}[/tex]
[tex]P_{2}= \frac{1.5 \times 15 \times 454.15}{25 \times 378.15}[/tex]
P₂ = 1.08 atm
Hence, the new pressure is 1.08 atm
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During a lab, 1.62g of COCl2 · x H2O were heated. After heating, only 0.88g of COCl2 remained. Calculate the formula of the hydrate.
Show your work.
You have to break down the cobalt chloride and water by finding the mass of each and using empirical formula.
Answer:
Explanation:
Let the number of moles of water in the required formula be "y".
The final formula should be in the form of : CoCl2 yH2O
1.62 g is the weight of CoCl2 and water in the sample
After heating, the remaining mass represents the mass the salt only
mass of water in sample = 1.62 - 0.88 = 0.74 g
From the periodic table:
molar mass of cobalt is 59 g
molar mass of chlorine is 35.5
molar mass of hydrogen is 1
molar mass of oxygen is 16
molar mass of formula = 59 + 2(35.5) + 18y = 130 + 18y g
Now we have calculate the mass/molar mass for each part of the formula (salt and water) and equate them to get number of moles of water as follows:
0.88 / 130 = 0.74 / y18
y = 6.07 which is approximately 6 moles
Thus, the final formula is CoCl2 6H2O. This hydrate is called cobalt(II)chloride hexahydrate.
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how many atoms are in 10.0 moles of titanium
Which two correctly relate the attraction between the particles of a liquid and
the temperature at which the liquid changes state?
A. Strong attractions mean the liquid melts at a lower temperature.
B. Strong attractions mean the liquid boils at a lower temperature.
C. Strong attractions mean the liquid boils at a higher temperature.
O D. Strong attractions mean the liquid melts at a higher temperature.
Answer:
C & D
Explanation:
The attractive force between particles of a liquid determines the temperature at which the liquid changes state: the stronger the attraction, the larger amount of energy is required to break the bonds to boil; i.e. at a higher temperature. So C. Strong attractions mean the liquid boils at a higher temperature is correct.
By the same reasoning, the stronger attractive force between particles also means that it takes more energy to change state from solid to liquid; i.e. a higher melting point. So D. Strong attractions mean the liquid melts at a higher temperature is also correct.
Why is the? The second ionization energy of sodium is about three times greater than the second ionization energy of magnesium
Answer:
~Na+1 is already in the preferred form. Because of this, the second ionization energy of sodium is higher than normal. Mg+1 loses an electron to form s2 p6 .
Examine the picture above. What process does it represent?
Answer:
The formation of water from hydrogen and oxygen
Explanation:
If 8.63 grams of Aluminum oxide react with Nitric acid, how many grams of water will be produced?
Taking into account the reaction stoichiometry, 4.57 grams of H₂O are formed when8.63 grams of Al₂O₃ reacts with HNO₃.
Reaction stoichiometryIn first place, the balanced reaction is:
Al₂O₃ + 6 HNO₃ → 2 Al(NO₃)₃ + 3 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al₂O₃: 1 mole HNO₃: 6 moles Al(NO₃)₃: 2 molesH₂O: 3 molesThe molar mass of the compounds is:
Al₂O₃: 102 g/moleHNO₃: 63 g/moleAl(NO₃)₃: 213 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al₂O₃: 1 mole ×102 g/mole= 102 gramsHNO₃: 6 moles ×63 g/mole= 378 gramsAl(NO₃)₃: 2 moles ×213 g/mole= 426 gramsH₂O: 3 moles ×18 g/mole= 54 gramsMass of water formedThe following rule of three can be applied: if by reaction stoichiometry 102 grams of Al₂O₃ form 54 grams of H₂O, 8.63 grams of Al₂O₃ form how much mass of H₂O?
[tex]mass H_{2} O=\frac{8.63 grams of Al_{2} O_{3} x54 grams of H_{2} O}{102 grams of Al_{2} O_{3}}[/tex]
mass of H₂O= 4.57 grams
Then, 4.57 grams of H₂O are formed when8.63 grams of Al₂O₃ reacts with HNO₃.
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chemistry help please!!!
Write the name of the Formula, Chromium(III) Sulfide
Answer:
Cr2S3
Explanation : Cr is +3
S is - 2 so when balancing it will give Cr2S3
9. When you move your hand from a hot stove what is the stimulus you are reacting to?
Answer:
if you touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away.
Explanation:
A sample of calcium oxide (CaO) has a mass of 2. 80 g. The molar mass of CaO is 56. 08 g/mol. How many moles of CaO does this sample contain? 0. 0499 moles 20. 0 moles 58. 9 moles 157 moles.
In chemistry, a mole is a measuring unit of atoms, molecules, ions etc. The number of moles of calcium oxide in the sample is 0.0499 moles.
What is a mole?A mole is a ratio of mass and the molar mass of the substance. It can measure the small number of molecules, atoms, ions etc. present in the compound.
Given,
Mass of calcium oxide = 2.80 g
Molar mass = 56.08 g/mol
Moles can be calculated as:
[tex]\begin{aligned}\rm moles &= \rm \dfrac{mass}{\rm molar \; mass}\\\\&= \dfrac{2.80}{56.08}\\\\&= 0.0499\;\rm mol\end{aligned}[/tex]
Therefore, option A. 0.0499 mol is the moles of the calcium oxide.
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Answer: 0.0499
I hope this helps
2 Ca + O2 2 CaO
If this reaction occurs with 5 moles of Ca and 5 moles of O2, how much CaO will be produced?
Answer:
5mol at most
Explanation:
as we hv 5mol Ca available, the 5 mol Ca can react with 5/2 = 2.5mol O2, as we have more mol of O2 than that Ca can react with, Ca is the limiting reactant. Therefore at most 5/2x2 = 5 mol of CaO can be made
What are three reasons that using renewable energy is important.
Answer:
1. they reduce green house gases
2. they can last a long time and come back pretty much every year and some never run out
3. we have unlimited supply of most if not all renewable resources
Explanation:
hope this helps!
Convert 220 grams of co2 into moles.
Answer:
5 moles
Explanation:
By convert grams to moles u need to divided the number of grams to the molar mass
220 ÷ 44.01 = 4.9 ≈ 5.0
A gas occupies a volume of 567 mL at 35. 0 oC and 99 kPa. What is the volume of the gas at 273
K and 101. 3 kPa?
Answer:
0.00 °C = 273 K. 1.00 atm = 760.0 mm Hg = 101.325 kPa = 101,325 Pa. 273 1.
Explanation:
A gas has a pressure of 100 kPa, a volume of 43.2 mL at a temperature of 19 C. What will be is volume is the pressure is changed to 101.3 kPa at 0 C?
Answer:
100=43.2
101.3=x
100x=101.3×43.2
100x=4376.16
x=4376.16/100
x=43.7616
Pls help me im drowned !!!
Hydrochloric acid isa acid so color is red .
#2
Here is the balanced equation
[tex]\\ \rm\Rrightarrow Na_2CO_3+2HCl\longrightarrow 2NaCl+H_2CO_3[/tex]
1 mol Na_2CO_3 takes 2mol HCL
16.2cm^3=0.016L1mol is 22.4L
moles of Na_2CO_3:-
0.016(22.4)=0.36molMoles of HCl=0.36(2)=0.72mol
An induced dipole-dipole interaction has been proposed between aromatic amino acid residues present in the cholinergic binding site and acetylcholine. What functional group of acetylcholine is involved?
a) the acyl methyl group.
b) the ester.
c) the ethylene bridge.
d) the quaternary ammonium head group.
Answer:
hi-
Explanation:
interaction with acetylcholine?
Aspartic acid 311
10) What amino acid in the binding site of the cholinergic receptor is involved in an ionic interaction with acetylcholine? Feedback: Aspartic acid 311 is ionised and is present in the binding site as a negatively charged aspartate ion.
two lamps (with a resistance of 10 Ohms each) are connected in a series circuit and are supplied with 100- volts of power. which of the following statements are true of the voltage that each lamp receives
a. Each lamp will recieve 50 volts
B. Each lamp will recieve 100 volts
C. The first lamp will recieve more voltage than the second lamp
Answer:
A
Explanation:
Each lamp has the same resistance of 10 ohms thus the voltage drop will be equal. In a series circuit, the Current, (I) is the same because it does not divide anywhere thus Voltage will vary with resistance.
The two lamps (with a resistance of 10 Ohms each) are connected in a series circuit and are supplied with 100- volts of power. The statements are true if the voltage that each lamp receives is each lamp will receive 50 volts. Therefore, option A is correct.
What do you mean by resistance ?The term resistance is defined as a measure of the opposition to current flow in an electrical circuit. Resistance is quantified in ohms, symbolized by the Greek letter omega (Ω).
Electric current relates to the flow of electrons. An easier way to state resistance is to consider an example of a person in a crowded market struggling to go from one shop to another.
Every lamp has the same resistance of 10 ohms thus the voltage drop will be the same. In a series circuit, the Current, (I) is the equal because it does not divide anywhere thus Voltage will vary with resistance.
Thus, option A is correct.
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One year, a herd of cattle released 2.44 metric tons of CH4 (methane) into the atmosphere. How many metric tons of carbon did this methane contain
The mass, in metric tons, of carbon in the methane is 1.83 metric tons
Calculating mass in a substance
From the question, we are to determine the quantity of carbon in the methane
The mass of carbon in the methane can be calculated from
Mass of carbon in the methane = [tex]\frac{Mass\ of\ carbon\ in\ a\ molecule\ of \ methane}{Mass\ of\ a\ molecule\ of \ methane}\times Total\ mass\ of\ the\ methane[/tex]
Mass of carbon in a molecule of methane = 12 g
Mass of a molecule of methane = 16 g
Therefore,
Mass of carbon in the methane = [tex]\frac{12}{16} \times 2.44[/tex]
Mass of carbon in the methane = 1.83 metric tons
Hence, the mass, in metric tons, of carbon in the methane is 1.83 metric tons
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Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. The balanced chemical equation is shown below. Cu 2AgNO3 Right arrow. Cu(NO3)2 2Ag The molar mass of Cu is 63. 5 g/mol. The molar mass of Ag is 107. 9 g/mol. What mass, in grams, of Ag is produced from a reaction of 31. 75 g of Cu? 26. 95 grams 107. 9 grams 215. 91 grams 431. 82 grams.
107.9 g of Ag is produced from a reaction of 31. 75 gram of Copper.
How we calculate mass from the moles?Mass of any substance will be calculated from its moles as:
n = W/M, where
W = required mass
M= molar mas
Given chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
From the stoichiometry of the reaction, it is clear that:
1 mole of Cu = produce 2 moles of Ag
Given mass of Cu = 31.75g
Molar mass of Cu = 63.5g/mol
Moles of Cu = 31.75g / 63.5g/mol = 0.5 moles
0.5 moles of Cu = produce 2×0.5 = 1 mole of Ag
Molar mass of Ag = 107.9g/mol
Required mass of Ag = 1mol × 107.9g/mol = 107.9 g
Hence, option (2) is correct i.e. 107.9 g of Ag is produced.
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There are 100 mg of caffeine in a shot of espresso. The chemical formula
for caffeine is C8H10N402. How many moles of carbon are present in the
caffeine in a shot of espresso?
there are 8 moles of carbon in the molecule because the ratio of carbon per the whole caffine molecule is 8 carbon atoms: 1 molecule of caffine so in terms of moles that's 8:1 :)
Answer:
Solve a problem with the first 100th on my phone and the phone is a bit annoying and I have to use it to get the battery back.
what type of bond is present in a copper wire
Answer:
the correct answer is Metallic bonding
Explanation:
hope this helps
have a awesome day
Which do you think will cool the fastest?
sand
water
air
metal
Convert 30.0g of water to moles
please help
Answer:
1.7
Explanation:
1 grams Water to mol = 0.05551 mol
30 grams Water to mol = 1.66525 mol
if we round that up the answer is 1.7
1. Natural gas is considered a nonrenewable resource because
A. It takes millions of years to form.
A. It takes millions of years to form.,
B. It is very expensive to make.
B. It is very expensive to make.,
C. It produces pollution when burned.
C. It produces pollution when burned.,
D. It cannot be used to generate electricity.
Answer:
hope this is help helpful
Explanation:
natural gas are considered nonrenewable because they can not be replenished in a short period of time.
Which choice describes climate? In March 1971, Canada was hit by a major blizzard and up to 32 inches of snow fell. The U.S. gulf coast was hit by Hurricane Katrina in 2005 and suffered extensive damage. The U.S. gulf coast typically has warm, wet weather and tropical storms during the summer and fall. An extremely dangerous tornado hit Jarrell, Texas in 1997 destroying 40 homes.
Answer:
Its C
Explanation:
If you look, you can see that it tells you the humidity and the that its warm but it also tells you that it storms a little to and that makes it easier to know the climate but if it just sayed it was warm that wouldn't be enough information
CAN I PLS HAVE BRAINLIEST. I NEVER GET IT. ITS A LITTLE CROWN UNDER MY ANSWER. PLS. ILL GIVE YOU BRAINLIEST JUST PLS
pLEASEEE HELPPP QUICCKKK
Answer:
a. carbonyl
Explanation:
this is acetaldehyde, and aldehydes are compounds that contain a carbonyl which is carbon double bonded with oxygen, and that carbonyl is bonded with at least one hydrogen atom.
2Ag(s) + S(s) -> Ag2S(s)
If we used 0.7 moles Ag and 0.312 moles S, would Ag be the limiting reactant?
Answer:
Sulphur
Explanation:
Sulphur because we been 2 ag for 1 s therefore 0.312 S will need 0.624 of Ag
Ag is not the limiting reactant in this case. The limiting reactant is determined by the reactant that is completely consumed first, and in this case, it is S.
To determine the limiting reactant, we need to compare the moles of each reactant to the stoichiometric ratio of the balanced equation. The balanced equation for the reaction is:
2Ag(s) + S(s) →Ag₂S(s)
According to the balanced equation, the stoichiometric ratio between Ag and S is 2:1. This means that 2 moles of Ag react with 1 mole of S to produce 1 mole of Ag₂S.
Given:
Moles of Ag = 0.7 moles
Moles of S = 0.312 moles
To determine if Ag is the limiting reactant, we need to compare the moles of Ag to the stoichiometric ratio.
Moles of Ag / Stoichiometric coefficient of Ag = 0.7 moles / 2 = 0.35 moles
Comparing this value to the moles of S, we can see that 0.35 moles of Ag is less than 0.312 moles of S. Therefore, Ag is not the limiting reactant in this case. The limiting reactant is determined by the reactant that is completely consumed first, and in this case, it is S.
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1. Which option correctly describes the reactants and products of a chemical reaction?A The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants can be more or less than the total number of moles of the products.
B The mass of the reactants can be more or less than the mass of the products. The total number of moles of the reactants must be equal to the total number of moles of the products.
C The mass of the reactants can be more or less than the mass of the products. The total number of moles of the reactants can also be more or less than the total number of moles of the products.
D The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants must also be equal to the total number of moles of the products.
The statement which correctly describes the reactants and products of a chemical reaction is: A. The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants can be more or less than the total number of moles of the products.
What is LOCOM?LOCOM is an abbreviation for the law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction. Thus, the mass of any substance in a balanced chemical equation would remain the same at the end.
According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance (reactants) must be equal to the mass of the product formed during a chemical reaction.
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What is the volume of 5 moles of oxygen gas at r.t.p ?
Explanation:
[tex]5mol \times \frac{22.4lit}{1mol} = 112lit[/tex]