Answer:
This question is incomplete, however, it is asking to calculate the empirical formula of the compound.
The empirical formula is N2O3
Explanation:
The following information about a compound was got from the question:
N = 36.8%
O = 63.2%
It can be said that the compound contains 36.8g of nitrogen (N) and 63.2g of oxygen (O).
Next, we convert each mass composition to moles by dividing by their respective molar masses.
N = 36.8g ÷ 14g/mol = 2.628mol
O = 63.2g ÷ 16g/mol = 3.95mol
Next, we divide each mole value by the smallest value (2.628mol).
N = 2.628mol ÷ 2.628 = 1
O = 3.95mol ÷ 2.628 = 1.5
We multiply each value by 2 to get a empirical ratio.
N = 2
O = 3
The ratio of N:O is 2:3, hence, the empirical formula is N2O3.
A balloon is filled with 3.50 L of water at 24.0°C. What is the volume of the water at 307 K?
Answer:
what is the volume of the water at 307 k?
CO2 + H20 - H2CO3
The reaction above is classified as
a combustion reaction
b double displacement
c synthesis
d decomposition
e single displacement
Answer:
the correct answer is option A
The half-life of Co-60 is 5.3 years. If the initial mass of the sample is 1000g, how much will remain after 26.5 years.
Answer:
31.25
Explanation:
The half life is 5.3 years
This means that 1.2 of the orginal matter is left after every 5.3 years.
To find this, divide 26.5(total years) by 5.3(hald life)
This gets you 5.
This is how many times half life occurs, or how many times the total mass is split in half.
This can be though of 1/2^5th power
Or
1/32
Now, lets mutliply this by the 1000 total mass:
1000*1/32
=
31.25g
This is your answer!
Hope this helps!
You have a 0.8 L of a 0.5 M HCl solution. How many moles of HCl does this solution contain?
Answer:
[tex]\boxed {\boxed {\sf 0.4 \ mol \ HCl}}[/tex]
Explanation:
Molarity is concentration measured in moles per liters. It is the number of moles of solute per liters of solution. The formula is:
[tex]molarity= \frac{moles \ of \ solute}{liters \ of \ solution}}[/tex]
We know the solution of HCl has a molarity of 0.5 molar and there are 0.8 liters of solution.
1 molar (M) is equal to 1 mole per liter. Let's convert the molarity of 0.5 M HCl to 0.5 mol HCl per liter. This will make unit cancellation easier.The moles of solute or HCl are unknown, so we can use x. Now, we can substitute all known values into the formula.
[tex]0.5 \ mol \ HCl /L = \frac {x}{0.8 \ L}[/tex]
Since we are solving for the moles of solute (x), we must isolate the variable. It is being divided by 0.8 liters. The inverse of division is multiplication, so we multiply both sides by 0.8 L.
[tex]0.8 \ L *0.5 \ mol \ HCl /L = \frac {x}{0.8 \ L} *0.8 \ L[/tex]
[tex]0.8 \ L *0.5 \ mol \ HCl /L=x[/tex]
The units of liters (L) cancel.
[tex]0.8 * 0.5 \ mol \ HCl= x[/tex]
[tex]0.4 \ mol \ HCl=x[/tex]
This solution contains 0.4 moles of HCl.
Which organic compound listed below does not have a carbonyl group ?
A. Aldehyde
B. Ketone
C. Ethers
D. Protein
E. Ester
F. Amides
what is the heat required to heat in 50 g sample of ice from -65 degrees Celsius to -40 degrees Celsius
Answer:
[tex]Q=2562.5J[/tex]
Explanation:
Hello there!
In this case, for this general calorimetry problem, it turns out possible for us to calculate the required heat by using the general heat equation in terms of the mass, specific heat and temperature change:
[tex]Q=mC(T_f-T_i)[/tex]
Thus, by plugging in the mass, the initial and final temperatures and the specific heat of ice, 2.05 in SI units, we obtain:
[tex]Q=50g*2.05\frac{J}{g\°C} (-40\°C+65\°C)\\\\Q=2562.5J[/tex]
Regards!
How many moles of aluminum oxide (Al2O3) will be produced if 1.5 mole of aluminum (AI) reacts with oxygen? Input a numerical answer only. 4Al + 302 ---> 2Al2O3
Explanation:
The number of moles of Al2O3 formed is approximately 4.25 moles. Second find the limiting reactant. Since O2 has less value that is 2.126 than Al that is 2.287, O2 is the limiting reactant in this reaction.
What determines the brightness of a light wave?
Answer: The brightness of light is related to intensity or the amount of light an object emits or reflects. Brightness depends on light wave amplitude, the height of light waves. Brightness is also somewhat influenced by wavelength.
Explanation:
Please try solving this question :)
Alcohol rather than water is used in a thermometer.
What property of alcohol makes it suitable to be used in
the thermometer?
Answer:
Ethanol
Explanation:
Answer:
Alcohol remains liquid at lower temperatures, but also vaporizes at lower temperatures (compared to water), so it is suitable for thermometers that operate over a lower temperature range, such as outdoor thermometers.
Explanation:
Hope it helps to you :) <3<3
What new evidence led scientists to change their minds about the geocentric model?
Galileo disproved the Ptolemaic theory, sanctioned for centuries by the Church, which held the Earth to be the central and principal object in the universe, about which all celestial objects orbited.
The new evidence led scientists to change their minds about the geocentric model is that the Sun and stars move across the sky in the same direction everyday. They appear to be going around the Earth. However, Galileo observed moons which orbited Jupiter. This suggests that not everything orbits the Earth and that the geocentric model is not correct.
What is Geocentric Model?Geocentric model is any theory of the structure of the solar system (or the universe) in which Earth is assumed to be at the centre of it all.
This model is often named Ptolemaic model after its most famous supporter, the Greco-Roman astronomer Ptolemy.
The geocentric is often referred to as the Medieval view of the universe and it dominated thinking into the early modern age.
Therefore, The new evidence led scientists to change their minds about the geocentric model is that the Sun and stars move across the sky in the same direction everyday. They appear to be going around the Earth. However, Galileo observed moons which orbited Jupiter. This suggests that not everything orbits the Earth and that the geocentric model is not correct.
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In the energy profile of a reaction, the species that exists at the maximum on the curve is called the ________. In the energy profile of a reaction, the species that exists at the maximum on the curve is called the ________. atomic state activated complex activation energy enthalpy of reaction product
Answer:
The activated complex
Explanation:
The activated complex are the species that exists maximum in every energy profile of a reaction.
Activated complex is nothing but an intermediate state of reactants formed during its conversion from a reactant to product state in coarse of reaction.
The activated complex is formed at the maximum energy level in the reaction path. And this difference between energy of the activated complex and the energy of the reactants is only known as activation energy
Dau coroana va roggg!!!!!!
Answer:
it's very easy and simple answer u can't do it
20. A gas is collected over water at 24.0 °C and 745 mm Hg. Use the water vapor pressure
table below to calculate the pressure of the dry gas alone. Show your work and round to
the proper number of significant digits. Do not put the unit.
T(0) P (mm Hg)
21 18.6
22 19.8
23
21.1
24 22.4
25 23.8
26 25.2
27 26.7
28 28.3
29 30.0
30 31.8
35 42.2
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
A balloon is inflated to a volume of 8.0 L on a day when the atmospheric pressure is 1.013 bar . The next day, a storm front arrives, and the atmospheric pressure drops to 0.968 bar . Assuming the temperature remains constant, what is the new volume of the balloon, in liters
Answer:
[tex]V_2=8.4L[/tex]
Explanation:
Hello there!
In this case, according to the definition of the Boyle's law, which describes de pressure-volume behavior as an inversely proportional relationship, it is possible for us to write:
[tex]P_1V_1=P_2V_2[/tex]
Thus, since we are given the initial pressure and temperature, and the final pressure, we are able to calculate the final volume as shown below:
[tex]baV_2=\frac{P_1V_1}{P_2}\\\\V_2=\frac{8.0L*1.013bar}{ 0.968bar}\\\\V_2=8.4L[/tex]
Regards!
A chemist must dilute 61.9 mL of 548. nM aqueous sodium carbonate (Na2CO3) solution until the concentration falls to 484. nM . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Round your answer to 3 significant digits.
Answer:
The final volume will be "70.08 mL".
Explanation:
The given values are:
Molar mass,
M1 = 548 nM
or,
= [tex]5.48\times 10^{-7} \ M[/tex]
M2 = 484 nM
or,
= [tex]4.84\times 10^{-7} \ M[/tex]
Volume,
V1 = 61.9 mL
V1 = ?
By using the expression, we get
⇒ [tex]M1\times V1=M2\times V2[/tex]
or,
⇒ [tex]V2=\frac{M1\times V1}{M2}[/tex]
By substituting the values, we get
[tex]=\frac{5.48\times 10^{-7}\times 61.9}{4.84\times 10^{-7}}[/tex]
[tex]=\frac{339.212}{4.84}[/tex]
[tex]=70.08 \ mL[/tex]
MOLE CONVERSIONS
1. How many H2O molecules are in 183.2 grams of H2O gas?
2. How much space (L) does 3.614 x 1026 molecules of H2O2 take up?
3. How many molecules are in 3492.5 grams of Mg3(PO4)2?
4. How many grams does 60.2 L of Al(NO3)3 weigh?
5. How many Nmolecules are in 473.2 grams of N ?
6. How many grams does 80.34 L of Hz weigh?
7. How many grams are in 5.39 x 1025 molecules of
Al(OH),?
Stoichiometry and Balancing Chemical Equations
Balance the following chemical reactions
8. _H2 + _N2 => _NH3
9. _58 + _O2 => _SO
10. _Ni(CIO)2 → _NICI + O2
11 _C₂H4
_02 > CO2
H2O
12 _KCIO
_КСІ
0
13 Cu(OH)2 + __HC H302
Cu(C2H2O2)2
14. CH8 + __0
CO ____H20
+
+
+
_H20
15. 76.2 Liters of O2 gas reacts with an excess of Cat STP. How many grams of
CO will be produced?
2C + O2 -> 200
Due in less than 5 minutes
Answer:
1. 6.116x1024 Molecules of H2O
2. 13400 L
3. 8.001x1024 Molecules of Mg3(PO4)2
4. 572 g.
5. 1.017x1025 Molecules of N2
6. 7.24 g
.7. 6980 g. of Al(OH)3
8. 3H2 + N2 => 2NH3
9. S8 + 8O2 => 8SO2
10. Ni(ClO3)2→ NiCl2 + 3O2
11. C2H4 + 3O2→ 2CO2 + 2H2O
12. 2KClO3→ 2KCl + 3O2
13. Cu(OH)2 + 2HC2H3O2→ Cu(C2H3O2)2 + 2H2O
14. C3H8 + 5O2→ 3CO2 + 4H2O
15. 191 g of CO
A knife is a example of a pulley True or false
Answer:
In my Opinion
Explanation:
False. There's no pulley system or activity in a knife.
Help plz:)))I’ll mark u Brainliest
Answer:
112.9-kJ
Explanation:
Example;
To find the energy, you should follow the following rule :
Q= mass * latent heat of vaporization
Q= m * l
Q= 50g * 2260 J/g
Q= 113000 J
Answer;
The heat of vaporization of water is 2257-J/g - each grams must release 2257-J of thermal energy. When water condenses its temperature remains constant.
Q = m x Hv ===> 50-g x 2257-J/g = 112,850-J = 112.9-kJ
1. In a chemical reaction
a. the mass of the reactants equals the mass of the products.
b. the mass of the products is greater than the mass of reactants.
c.the number of atoms in the reactants and products must change.
d. energy as heat must be added to the reactants.
Answer:
A
Explanation:
Law of conservation of matter
What do you think happens to the atoms of a substance when it burns?
Claim 1: All of the atoms are destroyed.
Claim 1: All of the atoms are destroyed.
Claim 2: All of the atoms rearrange to form a different substance or different substances.
Claim 2: All of the atoms rearrange to form a different substance or different substances.
Claim 3: Some of the atoms are destroyed, and some of the atoms rearrange to form a different substance or different substances.
Explain why you chose your answer.
Answer:Its claim 2
Explanation:claim 1 says All of the atoms are destroyed but atoms cant be destroyed.Claim 3 might seem correct but is not.
Changing from solid to a liquid at or above melting point
is
Answer:
liquefaction
liquefaction is a process when a something turns into a liquid.
Explanation:
Inquiry Extension Consider a reaction that occurs between solid potassium and chlorine gas. If you start with an initial mass of 15.20 g K, and an initial mass of 2.830 g Cl2, calculate which reactant is limiting. Explain how to determine how much more of the limiting reactant would be needed to completely consume the excess reactant. Verify your explanation with an example
The 3.13 g of K would be needed to completely react with the remaining [tex]Cl_2[/tex].
To determine which reactant is limiting, we need to calculate the amount of product that can be formed from each reactant and compare them. The reactant that produces less product is the limiting reactant, since the reaction cannot proceed further once it is consumed.
The balanced chemical equation for the reaction between solid potassium and chlorine gas is:
2 K(s) + [tex]Cl_2[/tex](g) -> 2 KCl(s)
From the equation, we can see that 2 moles of K react with 1 mole of [tex]Cl_2[/tex] to form 2 moles of KCl.
First, we need to convert the masses of K and [tex]Cl_2[/tex] into moles:
moles of K = 15.20 g / 39.10 g/mol = 0.388 mol
moles of [tex]Cl_2[/tex] = 2.830 g / 70.90 g/mol = 0.040 mol
Now, we can use the mole ratio from the balanced equation to calculate the theoretical yield of KCl from each reactant:
Theoretical yield of KCl from K: 0.388 mol K x (2 mol KCl / 2 mol K) = 0.388 mol KCl
Theoretical yield of KCl from [tex]Cl_2[/tex]: 0.040 mol [tex]Cl_2[/tex] x (2 mol KCl / 1 mol [tex]Cl_2[/tex]) = 0.080 mol KCl
We can see that the theoretical yield of KCl from K is 0.388 mol, while the theoretical yield of KCl from [tex]Cl_2[/tex] is 0.080 mol. Therefore, the limiting reactant is [tex]Cl_2[/tex], since it produces less product.
To determine how much more of the limiting reactant would be needed to completely consume the excess reactant, we can use the stoichiometry of the balanced equation.
We know that 1 mole of [tex]Cl_2[/tex] reacts with 2 moles of K to produce 2 moles of KCl. Therefore, the amount of additional K needed to react with the remaining [tex]Cl_2[/tex] can be calculated as follows:
moles of K needed = 0.040 mol [tex]Cl_2[/tex] x (2 mol K / 1 mol [tex]Cl_2[/tex])
= 0.080 mol K
This means that 0.080 moles of K would be needed to completely consume the remaining [tex]Cl_2[/tex]. We can convert this to a mass by multiplying by the molar mass of K:
mass of K needed = 0.080 mol K x 39.10 g/mol
= 3.13 g K
Therefore, The 3.13 g of K would be needed to completely react with the remaining.
Example verification:
Suppose we had an additional 0.50 g of [tex]Cl_2[/tex] in the reaction. Would all of the K be consumed, or would there still be excess K?
Moles of additional [tex]Cl_2[/tex] = mass of [tex]Cl_2[/tex] / molar mass of [tex]Cl_2[/tex]
Moles of additional [tex]Cl_2[/tex] = 0.50 g / 70.90 g/mol
Moles of additional [tex]Cl_2[/tex] = 0.0070 mol
The theoretical yield of KCl that can be formed from the additional [tex]Cl_2[/tex] is:
0.0070 mol [tex]Cl_2[/tex] x (2 mol KCl / 1 mol [tex]Cl_2[/tex]) x (74.55 g KCl / 1 mol KCl) = 1.04 g KCl
Therefore, the total amount of KCl that can be formed from all of the [tex]Cl_2[/tex] is:
5.95 g + 1.04 g = 6.99 g
The amount of K that would be needed to completely consume all of the [tex]Cl_2[/tex].
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Would you rather
Eat sweet foods for the rest of you're life?
or
Eat salty foods for the rest of you're life?
Answer:
Salty
Explanation:
Becuase sugar isn't good for you. Unless the sweet foods are fruits but like deserted aren't good for you
Answer:
Salty
Explanation:
Too sweet foods would just crush you, but with salt at least you can drink water :)
If we have 0.06 moles of HCI
How many grams of magnesium metal is that?
Answer:
1.44 g
Explanation:
From the question given above, the following data were obtained:
Number of mole of HCl = 0.06 mole
Mass of Mg =?
From the question given above, we discovered the number of mole of HCl is equivalent to the number of mole of Mg. Thus,
Number of mole of Mg = number of mole of HCl
Number of mole of Mg = 0.06 mole
Finally, we shall determine the mass of Mg. This can be obtained as follow:
Number of mole of Mg = 0.06 mole
Molar mass of Mg = 24 g/mol
Mass of Mg =?
Mass = mole × molar mass
Mass of Mg = 0.06 × 24
Mass of Mg = 1.44 g
Therefore, the mass of magnesium is 1.44 g
The initial concentration of a solution of NaOH is 5.0 M. What volume of the concentrated stock solution is needed to make 200 mL of .02 M solution? (YOU MUST INCLUDE UNITS IN YOUR ANSWER) *
Answer:
0.8 mL
Explanation:
Use the formula M1V1 = M2V2.
Plug the values in.
5(V1) = 0.02(200)
5V1 = 4
V1 = 0.8 mL
Hope this is right, correct me if I'm wrong!
Which element is not found in the skeleton of amino acids?
Answer:
Serine. Serine is non-essential amino acid supplied from food or synthesized by the body from a number of metabolites, including glycine. Serine is found in soybeans, nuts (especially peanuts, almonds, and walnuts), eggs, chickpeas, lentils, meat, and fish (especially shellfish).
Explanation:
How are tadpoles and larvae similar
A: They both fly.
B: They both develop antennae.
C: They both eat and grow a lot.
D: They are both fully grown adults
Answer:
C. they both eat and grow a lot, i hope it helps
Write the expression for K in terms of the solubility, s, for each salt, when dissolved in water. nickel(II) cyanide silver hydroxide
Answer:
[tex]Ksp=[Ni^{2+}][CN^-]^2\\\\Ksp=[Ag^+][OH^-][/tex]
Explanation:
Hello there!.
In this case, for this equilibrium problem, it turns out firstly necessary to write the chemical equations for the solubilization of both nickel (II) cyanide and silver hydroxide as shown below:
[tex]Ni(CN)_2(s)\rightarrow Ni^{2+}(aq)+2CN^-\\\\AgOH(s)\rightarrow Ag^+(aq)+OH^-[/tex]
Thus, by means of the law of mass action we set up these equilibrium expressions as shown below:
[tex]Ksp=[Ni^{2+}][CN^-]^2\\\\Ksp=[Ag^+][OH^-][/tex]
Best regards!
How can parents and other caregivers help children learn good nutrition in the home?
Answer:
Healthy Eating — Make sure your child's caregivers offer healthy snacks and meals. Consider other influences. Just as they do for you, your children's friends and the media can also affect healthy choices. Some TV, online, and other ads try to persuade children to consume high-fat foods and sugary drinks.
Propane is used as a fuel for camp stoves. It undergoes combustion to form carbon dioxide and water.
C3H3 +502 – 3 CO2 + 4H20
Determine the number of molecules of propane needed to produce 10.01 liters of carbon dioxide
Answer:
[tex]8.97x10^{22}molecules C_3H_8[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction and the fact that 22.4 L of a gas are occupied by 1 mol at standard pressure and temperature conditions, it will be possible for us to calculate the number of molecules of propane, by using the Avogadro's number, the 1:3 mole ratio with carbon dioxide and the aforementioned volume-mole ratio to obtain:
[tex]10.01LCO_2*\frac{1molCO_2}{22.4LCO_2}*\frac{1molC_3H_8 }{3molCO_2} *\frac{6.022x10^{23}molec\ C_3H_8}{1molC_3H_8} \\\\=8.97x10^{22}molecules C_3H_8[/tex]
Regards!