Answer:
The sodium ion has a stronger affinity for the electron, so more energy is required to move the electron. ... The anion can affect the result of the flame test. For example, a copper(II) compound with a non-halide produces a green flame, while a copper(II) halide yields a blue-green flame
Explanation:
What mass of carbon dioxide (CO2) is produced when 62.8g of methane (CH4) reacts with oxygen (O2)?
Answer:
Explanation:
Hello!
In this case, when methane is burnt in the presence of carbon dioxide, the following chemical reaction is carried out:
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Thus, since there is a 1:2 mole ratio between methane and oxygen, we set up the following mathematical expression to obtain the produced mass of carbon dioxide as a result of the reaction:
[tex]m_{CO_2}=62.8gCH_4*\frac{1molCH_4}{16.05gCH_4}*\frac{1molCO_2}{1molCH_4} *\frac{44.01gCO_2}{1molCO_2} \\\\m_{CO_2}=172.2gCO_2[/tex]
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Which terms below describes polymer that stretch
A. Elastomers
B. Thermosets
C. Polypropylene
D. Thermoplastic
The law of conservation of mass is correctly demonstrated in which statement about cellular respiration
Answer:
The total mass of glucose and oxygen is equal to the total mass of carbon dioxide and water.
Explanation:
:)
A gas that exerts a pressure of
15.6 psi in a container with a volume of
L will exert a pressure of
25.43 psi when transferred to a
container with a volume of 1.895 L.
Answer:
3.1L
Explanation: using Boyle's law p1v1=p2v2
p1=15.6,v1=?,p2=25.43,v2=1.895
manipulate the formula to favor so to find v1 the formula would be
p2v2/p1
25.43*1.895\15.6=3.1L
draw the structure of carbon and diamond
Answer:
hiiiiiiiiiiiiiiiiiiiiiiiiii
A 3.6 g sample of iron (III) oxide reacts with sufficient aluminum to be entirely used up.
How much iron is produced?
Answer:
0.046 mol
Explanation:
Step 1: Write the balanced equation
Fe₂O₃ + 2 Al ⇒ 2 Fe + Al₂O₃
Step 2: Calculate the moles corresponding to 3.6 g of Fe₂O₃
The molar mass of Fe₂O₃ is 159.69 g/mol.
3.6 g × 1 mol/159.69 g = 0.023 mol
Step 3: Calculate the moles of Fe produced from 0.023 moles of Fe₂O₃
The molar ratio of Fe₂O₃ to Fe is 1:2.
0.023 mol Fe₂O₃ × 2 mol Fe/1 mol Fe₂O₃ = 0.046 mol Fe
3. Copper (1) phosphate reacts with lithium chromate in a double displacement
reaction, as shown in the unbalanced equation:
Cu3PO4 + Li Cro. → LisPOA + Cu,Cros
B) How many grams of lithium phosphate can be made from reacting 25.0 mL of
1.5 M lithium chromate with excess copper (D) phosphate?
C) How many mL of 0.5 M copper (1) chromate will be formed from 500 mL of
3.0 M copper (1) phosphate?
ethyne gas is passed into ammonical silver nitrate solution?
Answer:
When acetylene gas is passed over ammoniacal silver nitrate soln gives white ppt of disilveracetylide is formed. - When acetylene is passed over ammoniacal silver nitrate solution, white ppt of disilveracetylide is formed.
How many atoms are in an Apple
Answer:10^27 atoms in an apple
Explanation:
Which of the following chemical equations is balanced correctly?
Cl2 + NaI—> 2 NaCl + 12
B202 + 2C—>B4C +CO
C6H6 + 02–>2C02 + 3H20
CS2 + 3C12–>CCl4 +S2Cl2
what are the main forces that operate between nonpolar molecules
Answer:
Van der Waals forces
Explanation:
Answer:
Dispersion
Explanation:
They said it was the answer.
Can somebody please help me
Answer:
a) carboxylic acid
b) amine
c) ester
d) aldehyde
e) alkene
f) ketone
Explanation:
Most of them are straight forward.
When 1.04g of cyclopropane was burnt in excess oxygen in a bomb calorimeter, the temperature rose by 3.69K. The total heat capacity of the calorimeter and it's contents was 14.01kJ/K. Determine the enthalpy of combustion of cyclopropane.
Answer:
[tex]\Delta _{comb}H=-2,093\frac{kJ}{mol}[/tex]
Explanation:
Hello!
In this case, since these calorimetry problems are characterized by the fact that the calorimeter absorbs the heat released by the combustion of the substance, we can write:
[tex]Q_{rxn}+Q_{cal}=0[/tex]
Thus, given the temperature change and the total heat capacity, we obtain the following total heat of reaction:
[tex]Q_{rxn}=-14.01kJ/K*3.69K\\\\Q_{rxn}=-51.70kJ[/tex]
Now, by dividing by the moles in 1.04 g of cyclopropane (42.09 g/mol) we obtain the enthalpy of combustion of this fuel:
[tex]n=\frac{1.04g}{42.09g/mol}=0.0247mol\\\\\Delta _{comb}H=\frac{Q_{rxn}}{n}\\\\ \Delta _{comb}H=-2,093\frac{kJ}{mol}[/tex]
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The enthalpy of combustion of cyclopropane is [tex]\Delta _c_o_m_b H= - 2.093 kJ/mol[/tex]
What is the enthalpy of combustion?
Enthalpy of combustion is the amount of heat produced when one mole of substance completely burns.
By the formula of calorimetry
[tex]Q_r_x_n + Q_c_a_l = 0[/tex]
The temperature change and total heat capacity is
[tex]Q_r_x_n = -14.01 KJ/K \times 3.69 K\\\\Q_r_x_n = -51.70 KJ[/tex]
Now, we get the enthalpy of combustion by dividing by the moles of 1.04 g of cyclopropane.
The number of moles is 42.09 g/mol.
[tex]n = \dfrac{1.4}{42.09} = 0.0247\\\\\Delta_c_o_m_bH =\dfrac{Q_r_x_n}{n} \\\\\Delta_c_o_m_bH = -2.093\; kJ/mol[/tex]
Thus, the enthalpy of combustion is -2.093 kJ/mol
Learn more about enthalpy of combustion
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K + Cl2 -->_KCI
-
a
2,3
b
32
С
2,2
1,2
d
Answer:
b 32
Explanation:
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
22.7 degrees Celsius = 22.7 + 273 = 295.7 K
[tex]\frac{(12.2)(150.4)}{295.7}=\frac{(9.7)(101.3)}{T_{2}} \\ \\ \frac{295.7}{(12.2)(150.4)}=\frac{T_{2}}{(9.7)(101.3)} \\ \\ T_{2}=\frac{(295.7)(9.7)(101.3)}{(12.2)(150.4)} \approx \boxed{158.35 \text{ K}}[/tex]
What type of energy is a motor
1.thermal
2.sound
3.light
4.electrical
5.mechanical
Use the References to access important values if needed for this question.
According to the following reaction, how many moles of sodium hydroxide will be formed upon the complete reaction of 0.263 moles
sodium with excess water?
2Na(s) + 2H, 0() 2NaOH(aq) + H2(g)
mol sodium hydroxide
Submit Answer
Retry Entire Group
2 more group attempts remaining
Answer:
0.263 mole of NaOH
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2Na + 2H₂O —> 2NaOH + H₂
From the balanced equation above,
2 moles of Na reacted to produce 2 moles NaOH.
Finally, we shall determine the number of mole of NaOH produced by the reaction of 0.263 mole sodium, Na. This can be obtained as follow:
From the balanced equation above,
2 moles of Na reacted to produce 2 moles NaOH.
Therefore, 0.263 mole of Na will also react to produce 0.263 mole of NaOH.
Thus, 0.263 mole of NaOH was obtained from the reaction.
What most likely accounts for the difference between curve A and curve B on
the energy diagram?
A. The reaction described by curve B is under greater pressure.
B. The reaction described by curve B is at a different temperature.
C. The reaction described by curve B has higher reactant
concentrations.
D. The reaction described by curve B is occurring with a catalyst.
Answer:
D
Explanation:
Ap3x
The accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst. Therefore, option D is correct.
What is an energy diagram ?An energy profile is a theoretical representation of a chemical reaction or process as a single energetic pathway that transforms reactants into products.
The amount of relative potential energy in each step of a reaction is depicted by an energy diagram. Reactants, transition states, and products are typically depicted on energy diagrams. It may also include intermediates and activation energy, depending on the reaction.
An energy diagram depicts how an object's potential energy varies with position and provides information about the object's motion.The potential energy curve depicts the amount of potential energy that the boulder has at each position.
Thus, option D is correct.
To learn more about an energy diagram, follow the link;
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Which is an example of an interaction between the biosphere and the atmosphere?
melting
desalination
sedimentation
respiration
Complete the following reaction.
14
N+
7
C+ H
1
Answer: 23/10 n
Explanation:
water is a ----------- natural resources
Answer:
True
Explanation:
How does the Sun get energy?
Answer:
Nuclear fushion
Explanation:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons
(b) The heating element is made from metal. Write down two properties
of the metal so that it can be used in the heating element.
1.
[2]
2.
(c) Plastic and stainless steel are synthetic materials. What is meant by
synthetic?
[1]
Answer:
Two properties of heating metal
1.high melting points.
2.malleable
What is meant by synthetic?
1.made of artificial material, not natural items, synthetic is made up of chemical synthesis. (synthetic compound, synthetic drug, synthetic material)
Explanation:
1.They are solid (with the exception of mercury, Hg, a liquid).
2 They are malleable (they can be easily hammered into very thin sheets).
Does dissolved potassium chloride affect the surface tension between water molecules?
Answer:
Inorganic impurities present in the bulk of a liquid such as KCl tend to increase the surface tension of water.
Explanation:
As potassium chloride (KCl) dissolves in water, the ions are hydrated. ... When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them.
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PLEASE I NEED HELP WITH THIS ASAP!!!!!!!!
Answer: I can’t help u with this... try therapy
Explanation:
Rank the following compounds in order of decreasing acid strength using periodic trends.Rank the acids from strongest to weakest. To rank items as equivalent, overlap them.
HI, HBr, MgH2, H2Se.
Explanation:
H2Se, HBr, MgH2, Hl
Because H2Se is stronger than Hl..
3.
Metals and nonmetals generally form ionic bonds
with each other. Which of the following sets of
elements will most likely form an ionic bond?
9
A. Na, F
B. CI, F C. Na, K D. He, O
Answer:
Na F
Explanation:
because electrovalent bond is present between them
10N 20N 12N What is the net force?
Answer:42n
Explanation:
An atom is to a molecule as
A.a nail is to a hammer
B. A brick is to a house
C. A house cat is to a lion
D. A sentence is to a word.
Answer:
it is B ^^ have a great day
Answer:
the correct answer is c a brick to a house
Explanation:
E
What type of chemical bond holds 2Na+ and O2-together in
Na20?
a Metallic Bond
blonic Bond
C Molecular Bond
d Van der Waals' force
e Covalent Bond
Answer:
Covalent bond.
Explanation:
It involves sharing electrons equally between both molecules.