Answer:
A. Ea, activation energy,, hope this helps.
Two cities are located at the same latitude but have very different weather conditions. What factor would most likely cause this difference?
Their distances from the equator
Their distances from the poles
Their elevations above sea level
Their locations in different climate zones
Answer:
Their distances from the equator
Explanation:
The closer you are to the equator the more likely you are to experience warmer weather.
What is a neutralization reaction?
Is the following reaction always, sometimes or never spontaneous: NaOH(s) → Na+(aq) + OH-(aq)
See
NaOH was in solid state
Both the solute and solvent turns to aqueous i.e liquid form .
So
Randomness increasesGibbs free energy decreases ∆G is -veSo
spontaneous alwaysA chemist reacted 11.50 grams of sodium metal with an excess amount of chlorine gas. The chemical reaction that occurred is shown.
Na + Cl2 → NaCl
If the percentage yield of the reaction is 85%, what is the actual yield? Show your work, including the use of stoichiometric calculations and conversion factors.
Actual yield is the definite mass of the product obtained from the reaction. The actual yield of the reaction is 24.83 gms.
What is the percentage yield?Percentage yield is the proportion of the actual to the theoretical yield. The formula is given as,
% yield = Actual yield ÷ Theoretical yield × 100
The balanced chemical reaction is given as:
2 Na + Cl₂ → 2NaCl
From the reaction:
2 × 23 Na = 2 × 58.44 gm of NaCl
If, 1 gm of Na will produce = (2 × 58.44) ÷ (2 × 23)
Then, 11.50 gms sodium will produce, (2 × 58.44) ÷ (2× 23) × 11.50
= 29.22 g
So, the actual yield is calculated as:
= % yield × Theoretical yield ÷ 100
= 85 × 29.22 ÷ 100
= 24.83 g
Therefore, the actual yield of the reaction is 24.83 gms.
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Answer:24.83 g is actual yield
Explanation:
advantage of fossil fuels
Answer:
I don't know
Explanation:
I don't know the answer but it is use for car
Write a conversion factor that converts between moles of calcium ions in calcium phosphide, Ca3P2, and moles of Ca3P2.
The conversion factor between moles of calcium ion and moles of [tex]Ca_3P_2[/tex] in [tex]Ca_3P_2[/tex] would be 3 to 1.
Mole fraction[tex]Ca_3P_2[/tex] if formed from 3 carbon atoms and 3 phosphate atoms according to the equation:
[tex]3Ca + 2P --- > Ca_3P_2[/tex]
Thus, there are 3 moles of calcium in every 1 mole of [tex]Ca_3P_2[/tex].
The conversion factor between moles of calcium and moles of [tex]Ca_3P_2[/tex] will. therefore, be 3 to 1 or simply 3:1.
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a sample of sulfur dioxide occupies a volume of 652 mL at 40.0 C and 0.75 atm. What volume will the sulfur dioxide occupy at STP?
The volume that sulfur dioxide will occupy with a volume of 652 mL at 40.0°C and 0.75 atm is 0.019moles. Details about volume can be found below.
How to calculate volume?The volume of a gas can be calculated using the following formula:
PV = nRT
P = pressureV = volumen = number of molesR = gas law constantT = temperature0.75 × 0.652 = n × 0.0821 × 313
0.489 = 25.69n
n = 0.489/25.69
n = 0.019moles
Therefore, the volume that sulfur dioxide will occupy with a volume of 652 mL at 40.0°C and 0.75 atm is 0.019moles.
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Besides drinking water, how is water helpful for life and nature?
Answer:
The composition of a water molecule is one of the first chemical compounds we learn—H2O—two hydrogen atoms and one oxygen atom. The atoms connect in a slightly offset or triangular structure, which creates a positive charge on one side of the molecule and a negative charge on the other.
Explanation:
Water is essential to life—we learn this early in our elementary school years. This information is often accompanied by the fact that over 50% of our bodies are made up of water. However, the lesson does not always go on to explain what it is about water that makes it so essential.
(Hope this was helpful!)
Determine the equilibrium constant, K, for the equilibrium below given the
equilibrium constants of the other equilibria under the same temperature.
CO(g) + H2O(g) = CO2(g) + H2(g)
h
K7 = ?
2H2(g) + O2(g) = 2H2009)
K2 = 1.22
200(g) + O2(g) = 2C02(g)
Kz = 5.39
= =
Pls help
Answer:
or reactions that are not at equilibrium, we can write a similar expression called the reaction quotient QQQ, which is equal to K_\text cK
c
K, start subscript, start text, c, end text, end subscript at equilibrium.
Explanation:
How many moles of NaCl are in 5.0 L of a 0.200 M solution?
Answer:
0.1 moles
Explanation:
moles=5.0×0.200
The electron configuration of an element is shown below.
1s^22s^22p^5
Name the group this element belongs to in the periodic table and explain your answer. Based on the electron configuration, explain how many electrons it is likely to receive from the atom of another element during the formation of a bond.
Answer:
Fluorine 1s2 2s2 2p5
Explanation:
it is likely to receive 1 electron
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In the periodic table, this element belongs to the 17th group. As a result, the element has a tendency to gain one electron during bond formation in order to achieve octet.
What is octet state?According to the octet rule, atoms are most stable when their valence shells contain eight electrons. The eight electrons that fill an atom's outermost shell are known as octets.The octet rule is significant because it predicts how atoms will bond based on their valence electrons' outer shells. Atoms form a certain number of bonds in order to share electrons with other atoms, resulting in an octet of eight electrons. For example, the outer shell of oxygen contains only six electrons.electronic configuration is:
[tex]1s^22s^22p^5[/tex]
The given element contains two electrons in the 2s orbital and five electrons in the 2p orbital. As a result, the energy level with n = 2 is the outermost energy level in this case. As a result, the element has 2 + 5, or 7 valence electrons. Elements with 7 valence electrons are classified as belonging to periodic table group 17.The element has 7 valence electrons, so it requires one more electron to achieve the stable octet state. As a result, the element has a tendency to gain one electron during bond formation in order to achieve octet.To learn more about octet rule, refer:
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How many mole of water would be found in 4.54 X 10 34 molecules of H2O help me please
Taking into account the definition of avogadro's number, in 7.54×10¹⁰ moles of water are 4.54×10³⁴ molecules of water.
Definition of Avogadro's NumberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of moles of H₂OYou can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of water, then 4.54×10³⁴ molecules are contained in how many moles of water?
amount of moles of water= (4.54×10³⁴ molecules × 1 mole)÷ 6.023×10²³ molecules
amount of moles of water= 7.54×10¹⁰ moles
Finally, in 7.54×10¹⁰ moles of water are 4.54×10³⁴ molecules of water.
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Please help!! Picture included. One try please explain answer.
Answer: 2
Explanation:
Artificial transmutation occurs when nuclides are bombarded by particles like alpha particles or beta particles.
what are the characteristics of binding energy
Explanation:
binding energy, amount of energy required to separate a particle from a system of particles or to disperse all the particles of the system. Binding energy is especially applicable to subatomic particles in atomic nuclei, to electrons bound to nuclei in atoms, and to atoms and ions bound together in crystals.
# 19 of precipitation
The value of Ksp for calcium sulfate is 2.4 x 10-5.
A solution of calcium sulfate with a concentration of 2.0 x 10-2 mol L-¹ is
Select one:
O a. undersaturated and precipitation of solid calcium sulfate will occur.
O b. of unknown saturation so prediction is not possible.
O c. undersaturated and precipitation of solid calcium sulfate will not occur.
O d. supersaturated and precipitation of solid calcium sulfate will occur.
supersaturated and precipitation of solid calcium sulfate will not occur.
e.
The solution is undersaturated and precipitation of solid calcium sulfate will not occur.
What is Ksp?Ksp stands for solubility product constant. The solubility product constant, Ksp, is the equilibrium constant for a solid substance dissolving in an aqueous solution.
From the given information, the solubility product constant of calcium sulfate is smaller than the concentration of its solution, thus, the solution is undersaturated and precipitation of solid calcium sulfate will not occur.
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How many moles of iron are in (2.0x10^-36) atoms of iron (Fe)?
Answer:
Approx. 20 moles of iron
Explanation:
There are approx. 6.022 ×1023 iron atoms per mole of ion. This quantity, this number of iron atoms has a mass of 55.85 ⋅ g.
The proposed mechanism for a reaction is:
Step 1: A+B= X(fast)
Step 2: X+C - Y(slow)
Step 3: Y - D (fast)
Which rate law is consistent with this mechanism?
-
O A.
rate = k[A][B]
ОВ.
rate = K[X][C]
O C.
rate = k[A][B][C]
OD.
rate = k[X][Y]
=
Answer:
rate = k[X][C]
Explanation:
When you are solving for rate law, you are only looking at the reactants of the slow reaction. In this case, step 2 is the slow one. Since there is only one X and one C on the reactants side, the coefficient in the rate law would each be one, which you don't need to include, as it is assumed.
can you Explain the process of how clouds form?????
Answer: Clouds need two things to form: cool air and particles on which water vapor can condense. Clouds form as air cools. Cold air cannot hold as much water vapor, so the water vapor condenses. Water vapor condenses on small particles in the atmosphere, such as smoke, salt, and dust. As a result, clouds form.
Explanation: correct on edge
you have separate solutions of a monoprotic, diprotic, and triprotic acid which each have the same concentrations in terms of molarity. you wish to neutralize a solution of calcium hydroxide. which acid solution would require more volume to neutralize the base?
a)monoprotic solution
b)diprotic solution
c) triprotic solution
d) you need to know the exact acid concentration to answer this question
e) you need to know the exact volume and concentration of the base solution to answer this question
Answer:
I think it's d but I'm not 100% sure
Explanation:
Which of the following is a synthesis reaction?
a) 2KCIO3 → 2KCl + 302
O b) 2 C4H20 + 13 02 + 8 CO2 + 10 H20
O c) Fe + CuCl2 → FeCl2 + Cu
O d) 4 A1+3 02 → 2 Al2O3
Answer: 4 A1+3 02 → 2 Al2O3
Explanation: Two different atoms combines together to produce a compound.
Answer:
c) Fe + CuCl2 → FeCl2 + Cu
Explanation: Synthesis Reaction is when you get same thing on the other side even if its not in the same order after you add the components.
If Iridium (element 77) emits radiation and becomes platinum (element 78) what type of radiation is emitted?
Answer:
Beta
Explanation:
Cause it emits in and become platinum so I believe its beta
If Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.
What is radiation?Radiation in the chemistry is a branch of nuclear chemistry which deals with the study of the chemical effects of radiation of alpha beta and gamma rays on matter or any radioactive atom of periodic table.
This is very different from radio-chemistry as no radioactivity or radioactive rays needs to be present in the material which is being chemically changed by the radiation by removing proton from the nucleus.
Therefore, Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.
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How do we use Chemistry everyday?
Answer:
Discoloration of leaves.
Food Digestion.
Common salt.
Icefloating on water.
Tears while chopping onions.
Sunscreen.
Medicines.
Hygiene.
i gave you 8 answers. :)
A 150.0 mg block at 22.5⁰C has a volume of 5,382 cm³.
Which answer choice represents BOTH the correct temperature of the block in Kelvin AND the correct density of the block in g/cm³?
72.5 ⁰K; 2.78 x 10⁻⁵ g/cm³
296 ⁰K; 3.59 x 10⁴ g/cm³
-250 ⁰K; 3.59 x 10⁻⁴ g/cm³
296 ⁰K; 2.78 x 10⁻⁵ g/cm³
Density is the ratio of mass and volume. The temperature in kelvin is 296 kelvin and the density of the block is 2.78 x 10⁻⁵ g/cm³. Thus, option D is correct.
What is density?Density is the gms of the substance present in a cubic centimeter of volume. It is calculated in g/ cm³.
Given,
Mass of the block = 150.0 mg
Volume = 5382 cm³
Density is calculated as:
D = Mass ÷ volume
= 0.15 gm ÷ 5382 cm³
= 2.78 × 10⁻⁵ gm/ cm³
Temperature from Celsius to kelvin is converted as:
0°C + 273.15 = 273.15K
22.5 + 273.15 = 295.65 Kelvin
Therefore, option D. 296⁰K; 2.78 x 10⁻⁵ g/cm³ is correct.
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4. The half-life of F-20 is 11.0 s. If a sample initially
contains 5.00 g of F-20, how much F-20 remains after
44.0 s
The amount of the F–20 that will remain after 44 s given the data from the question is 0.3125 g
Data obtained from the question Half-life (t½) = 11 sOriginal amount (N₀) = 5 gTime (t) = 44 sAmount remaining (N) = ?How to determine the number of half-lives Half-life (t½) = 11 sTime (t) = 44 sNumber of half-lives (n) =?
n = t / t½
n = 44 / 11
n = 4
How to determine the amount remaining Original amount (N₀) = 5 gNumber of half-lives (n) = 4Amount remaining (N) = ?N = N₀ / 2ⁿ
N = 5 / 2⁴
N = 5 / 16
N = 0.3125 g
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Please help me answer this question...
[tex] \begin{gathered} \begin{array}{ |c|c| } \pmb{ \sf{Electrolyte}}& \textsf{ \textbf{Formula of Ions}}\\ \\ \\ \sf sodium \: sulphate& \bf \red{Na_2SO_4} \\ \\ \sf magnesium \: chloride& \red{ \bf MgCl_2} \\ \\ \sf zinc \: sulphate & \bf \red{ZnSO_4} \\ \\ \sf potassium \: iodine& \red{ \bf KI} \\ \\ \sf sodium \: hydroxide& \bf \red{NaOH} \\ \\ \sf Copper(II) \: chloride & \red{ \bf CuCl_2} \\ \\ \sf silver \: nitrate& \red{ \bf{AgNO_3}}\end{array}\end{gathered}[/tex]
[tex]\\\\\\[/tex]
Sodium sulphatevalency:
Sodium - [tex]\sf Na^+[/tex]
sulphate - [tex]\sf {SO_4}^{-2}[/tex]
Magnesium Chloridevalency:
Magnesium- [tex]\sf Mg^{+2}[/tex]
Chloride- [tex]\sf Cl^{-1}[/tex]
zinc sulphatevalency:
zinc- [tex]\sf Zn^{+2}[/tex]
sulphate [tex]\sf SO_4^{-2}[/tex]
potassium iodinevalency:
potassium - [tex]\sf K^{+1}[/tex]
sulphate - [tex]\sf I^{-1}[/tex]
sodium hydroxidevalency:
sodium - [tex]\sf Na^{+1}[/tex]
hydroxide - [tex]\sf OH^{-1}[/tex]
Copper(II) chloridevalency:
Copper(II) - [tex]\sf Cu^{+2}[/tex]
chloride - [tex]\sf Cl^{-1}[/tex]
Silver nitratevalency:
Silver - [tex]\sf Ag^{+1}[/tex]
nitrate - [tex]\sf NO_3^{-1}[/tex]
[tex]\\\\\\[/tex]
Key Points :
Remember metals always have positive valency because lose their electrons from their valence shell to obtain Nobel gas configuration. And bases always have negative valency because they gain electronics to complete their shell and hence to obtain Nobel gas configuration.Metals are always written before basesWhile writing formula if both Ions have same valency then we don't write them in formula.⭑━━━━━━━✵━━━━━━━⭑
❥ωเɳ∂ყ✞ɱเɳƭ࿐Which is the correct equation for calculating pH?
a
pH = log[H+]
b
pH = -log[H+]
c
pH = 10-[H+]
d
pH = 10-[H+]
Answer:
b
Explanation:
That is the defintion of pH
A mass of 2.20 kg of sodium phosphate is converted into the following number of moles
Explanation:
please refer to the attachment
Select the correct answer.
Which is an intermediate in this reaction mechanism:
step 1: H202 + 1 - H20 + O
step 2: H202 + or - H20 + O2+1"
A. H202
B.I-
C.OI-
D.O2
Answer:
I^-
Explanation:
Usually in these reactions we use palladium (pd) or platinum (pt) or halogens
Intermediate is the elements which runs the reaction.
Here iodine is doing that.
so option B is correct
What is the pH range of acids?
O A. 0.7
O B. 7 - 14
O C. 7
O D. 0-14
Answer:
The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
Answer:
7 is the neutral pH; while anything less than 7 is acidic & anything higher than 7 is basic/alkaline
0-14 is the range of acids
Explanation:
6. How many liters of 4.0 M solution can
be made using 8.0 mol of lithium
bromide?
8.0 mol of lithium bromide
4 M solution of lithium bromide requires 4 moles of the compound per liter
8 ÷ 4 = 2
answer is 2 Liters
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