Answers
Answer:
Explanation:
NaCl = Na⁺ + Cl⁻
6120 ions of NaCl will contain 3060 ions of Na⁺ and 3060 ions of Cl⁻ , forming 3060 molecules of NaCl .
6.02 x 10²³ molecules of NaCl = 1 mole
3060 molecules of NaCl = 3060 x 10⁻²³ / 6.02 moles
= 508.30 x 10⁻²³ moles
= 5.08 x 10⁻²¹ moles
Answer : 5.08E-21 moles .
Related Questions
A 0.010 M aqueous solution of a weak acid HA has a pH of 4.0. What is the degree of ionization of HA in the solution?
a. 1%
b. 0.001%
c. 0.1%
d. 10%
e. 0.01%
Answers
Name the reaction type & mechanism of the following reactions:
Answers
Answer:
MECHANISM:
1) The lone pair on oxygen attacks the H-Br molecule forming a hydronium ion.
2) Formation of carbocation.
3) Attack of Nucleophile Br − .
Explanation:
Answer:
DISPLACEMENT REACTION
COMBINATION REACTION
DOUBLE DISPLACEMENT REACTION
DECOMPOSITION REACTION
An electron's position cannot be known precisely.
Only its probability of being in a certain location
can be known.
Bohr model
plum pudding model
electron cloud model
DONE
Answers
Answer:
electron cloud model!!!!!
Explanation:
edge
The atomic model is used to depict the structure and the composition of the element. The probability of the electron in the atom is given by the electron cloud model. Thus, option C is correct.
What is the electron cloud model?The electron cloud model is the currently accepted atomic model presented by Erwin Schrodinger. It is a modern model that states that the exact position of the electron in the atom can not be determined.
It proposed the probable position of the electron based on the electron cloud density or the fuzzy cloud around the nucleus. The likely location of the electron is given by the maximum dense area. This model falsified the older models that stated the accurate position of the electron.
Therefore, the probable position of the electron was given by option C. electron cloud model.
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PLEASE HELP
For the following chemical reaction, what mass of silver iodide, Agl, (in grams) will be produced from 3.11 mol of calcium
iodide, Calz?
Cal, + 2 AgNO, — 2 AgI + Ca(NO3)2
Answers
Answer:
1461.7 g of AgI
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
CaI₂ + 2AgNO₃ —> 2AgI + Ca(NO₃)₂
From the balanced equation above,
1 mole of CaI₂ reacted to produce 2 moles of AgI.
Next, we shall determine the number of mole AgI produced by the reaction of 3.11 moles of CaI₂. This can be obtained as follow:
From the balanced equation above,
1 mole of CaI₂ reacted to produce 2 moles of AgI.
Therefore, 3.11 moles of CaI₂ will react to produce = 3.11 × 2 = 6.22 moles of AgI
Finally, we shall determine the mass of 6.22 moles of AgI. This can be obtained as follow:
Mole of AgI = 6.22 moles
Molar mass of AgI = 108 + 127
= 235 g/mol
Mass of AgI =?
Mass = mole × molar mass
Mass of AgI = 6.22 × 235
Mass of AgI = 1461.7 g
Therefore, 1461.7 g of AgI were obtained from the reaction.
calculate the vapor pressure of water
Answers
\(p = 10 \frac{a - b}{(c + t)} \)
Explanation:Vapor Pressure of Water calculator Formula:
\(p = 10 \frac{a - b}{(c + t)} \)
7. in which of the following pairs of alkenes are the two compounds isomers?
a.hexane and 3-methlyhexane
b.2,4-dimethlyhexane and 2,4-dimethlyheptane
c.3-methlynonane and 3,4dimethyloctane
d.ethane and propane
Answers
The compounds that are isomers in the list are 3-methlynonane and 3,4dimethyloctane. option C
What are isomers?We know that isomers has to do with two compounds that have the same molecular formula but do not have the same mass number. In this case, we have been told that a pair of the alkenes that are part of the list are isomers.
We must now look out for the compounds that would have the same molecular formula in the lest and the compound that would be exactly that are the compounds 3-methlynonane and 3,4dimethyloctane.
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Drag each tile to the correct box.
Adam takes a bus on a school field trip. The bus route is split into the five legs listed in the table. Find the average velocity for each leg of the trip.
Then arrange the legs of the trip from highest velocity to lowest
Leg Distance (km) Time (min)
A 18
9
B
25
C
Uo
24
48
15
8
12
D
E
E
15
7
leg A
leg B
leg C
leg D
leg E
1
1
Answers
Answer: leg b, leg c, leg d, leg a, leg e in that order
Explanation: you can tell due to the circumstances
Answer: B C D A E
Explanation:
that’s just the answer just took the test!!!
hope this helps!!
A 75 N force stretches a spring 175 cm. What was the proportionality constant?
Answers
Answer:
The proportionality constant of the spring is 0.42857 N/cm.
Explanation:
The proportionality constant (k) of a spring is given by the equation: force (F) = k * displacement (x)
k = F / x
Therefore, to find the proportionality constant of the spring, we can divide the force applied (75 N) by the displacement (175 cm)
k = 75 N / 175 cm
k = 0.42857 N/cm
The proportionality constant of the spring is 0.42857 N/cm.
How many moles of particles per liter in 0.591 M LiF?
Answers
Answer:
Below
Explanation:
Each liter contains .591 moles
each mole is 6.02 x 10^23 particles
.591 x 6.02 x 10^23 = 3.56 x 10^23 particles
Pls help ASAP it’s timing meeee!!!!!
Answers
Part E Why does the car stop? Where did the energy go?
Answers
When the moving car brakes to the stop the kinetic energy of car will be converted to the heat energy.
The mechanical brake will be applies to the friction force and it convert the kinetic energy of the car into the thermal energy that which then dissipates on atmosphere. The process of the braking will follow the principle of the conservation of the energy.
The conservation of the energy is the principle, that is expressed in its the most general form, and it is the first law of the thermodynamics. The first law of thermodynamics explains that "the energy of the universe remains the same."
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This question is incomplete, the complete question is :
A car in motion has kinetic energy. A moving car is suddenly stopped. Why does the car stop? Where did the energy go?
-Convert 6.02 x 1020 formula units of MgCl₂ to mol of MgCl₂:
Answers
6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.
Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.
Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:
(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))
The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:
(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol
Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.
Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.
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Chlorine reacts with sodium and with hydrogen.
Compare the structure and bonding in sodium chloride and hydrogen chloride.
Answers
Answer:
Sodium Chloride has Ionic bond while Hydrogen Chloride has covalent bond.
Explanation:
Na has 11 electrons (2, 8, 1) and need to give away 1 electron to be stable
Cl has 17 electrons ( 2, 8, 7) and needs 1 electron to be stable.
Na transfers 1 electron to CL to form Ionic bond.
While
Hydrogen has 1 electron and shares with Chlorine to be stable.
Covalent bond involves sharing.
Chlorine reacts with sodium to form ionic sodium chloride while chlorine reacts with hydrogen to form covalent hydrogen chloride.
The nature of bonding between atoms depends on their relative difference in electronegativity.
Chemical bonding is the process by which atoms come together to form compounds.
There are different kinds of chemical bonds;
Ionic or electrovalent bondCovalent bondMetallic bondAn ionic bond is formed when there is high electronegativity difference between the bonding atoms. Typically, this type of bond is formed when the electronegativity difference is about 2.0 and above.
For a covalent bond, an electronegativity difference of about 0.4 - 1.7 is considered a polar covalent bond. Lower values of electronegativity difference corresponds to a nonpolar bond.
The electronegativity difference between sodium and chlorine is about 2.23. This corresponds to a pure ionic bond. The compound is composed of chlorine and sodium ion pairs alternately located in a crystal lattice as shown in the image attached.
The electronegativity difference between chlorine and hydrogen is about 0.96. This corresponds to a polar covalent bond. The negative end of the dipole points towards chlorine while the positive end of the dipole points towards hydrogen.
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What is the percent by mass of hydrogen in aspirin C9 H8 O4?
Answers
Answer
The percent by mass of hydrogen in aspirin, C9H8O4 = 4.44%
Explanation
What to find:
The percent by mass of hydrogen in aspirin, C9H8O4
Step-step-solution:
The first step is to determine the mass of hydrogen in aspirin.
From the periodic table, the atomic mass of H = 1.0 g
Since there are 8 atoms of H in aspirin, the mass of H in C9H8O4 will be
8 x 1.0 g = 8.0 grams
The next step is to determine the total mass of aspirin.
From the periodic table, the atomic masses: (H = 1.0, C = 12.0, O = 16.0)
Total mass of C9H8O4 = (9 x 12.0 g) + (8 x 1.0 g) + (4 x 16.0 g)
Total mass of C9H8O4 = 108.0 g + 8.0 g + 64.0 g
Total mass of C9H8O4 = 180.0 grams
The final step is to determine the percent 6by mass o hydrogen in aspirin, C9H8O using the formula below:4
\(\begin{gathered} Percentby\text{ }mass\text{ }of\text{ }hydrogen=\frac{Mass\text{ }of\text{ }hydrogen}{Total\text{ }mass\text{ }of\text{ }aspirin}\times100\% \\ \\ Percentby\text{ }mass\text{ }of\text{ }hydrogen=\frac{8.0\text{ }grams}{180.0\text{ }grams}\times100\% \\ \\ Percentby\text{ }mass\text{ }of\text{ }hydrogen=0.0444\times100\% \\ \\ Percentby\text{ }mass\text{ }of\text{ }hydrogen=4.44\% \end{gathered}\)The percent by mass of hydrogen in aspirin, C9H8O4 = 4.44%
Photoelectric effect will occur only if frequency of light striking an electron in a metal is above a certain threshold frequenci
Answers
The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.
The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.
The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.
This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.
Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.
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A compound containing nitrogen and oxygen is decomposed in the laboratory. It produces 24.5 g nitrogen and 70.0 g oxygen. Calculate the empirical formula of the compound.
Answers
Answer:
N2O5
Explanation:
1. Convert to moles
24.5g N * 1mol/14g = 1.75
70.0g * 1mol/16g = 4.375
2. Divide each value by the smallest
1.75/1.75 = 1
4.375/1.75 = 2.5
3. Multiply each by a whole number so that they are both whole numbers
1*2 = 2
2.5*2 = 5
4. These are moles of elements present in the compound
Answer: N2O5
Question: You decompose a compound containing nitrogen and oxygen in the laboratory and produce 24.5 g of nitrogen and 70.0 g of oxygen. Calculate the empirical formula of the compound.
Pls help me asap I don’t know how to do this
Answers
Answer:
\(3\)Explanation:
Here, we want to know the number of moles of water molecules present in the hydrate
Firstly, we need to get the percentage by mass of water
To get this, we have to divide the percentage lost to heating by the total mass and convert to a percentage
Mathematically, we have that as:
\(\frac{450-376.76}{450}\times\text{ 100 \% = 16.276 \%}\)What this means is that the percentage by the molar mass of water is still 16.276%
To get the number of moles of water, let us call it n
The molar mass of water divided by the total mass of the hydrate as a percentage is equal to 16.276%
Thus, we have it that;
The molar mass of n moles of water is (18 * n = 18n g/mol : 1 mole of water has a mass of 18g)
For the anhydrous part, the molar mass is 278 g/mol
Thus, we have the percentage as:
\(\begin{gathered} \frac{18n}{278\text{ + 18n}}\times100\text{ \% = 16.276} \\ \end{gathered}\)From the above, we can get the value of n
Thus, we have that as:
\(\begin{gathered} \frac{100(18n)}{278\text{ + 18n}}\text{ = 16.276} \\ \\ 16.276(278\text{ + 18n\rparen = 1800n} \\ 4524.60\text{ +}292.96n\text{ = 1800n} \\ 1800n-292.96n\text{ = 4524.60} \\ 1507.04n\text{ = 4524.60} \\ n\text{ = }\frac{4524.60}{1507.04} \\ n\text{ = 3} \end{gathered}\)The number of hydrate molecule is 3
1. You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer.
Answers
Answer:
You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer.
Explanation:
In the separating funnel, the liquid with less density exists at the top layer and the liquid with greater density will exist at the bottom layer.
To identify the aqueous layer, add a bit of water to the separating funnel.
Then, observe where the water will go and mix.
If it mixes with the bottom layer, then the bottom layer is the aqueous layer.
If water mixes with the top layer, then top layer is the aqueous layer.
A method we could use to determine which layer is the aqueous layer is by adding 2-4 drops of water in the separatory funnel.
Explanation:
A separatory funnel is a glass apparatus used in labs to separate two immiscible liquids from each other.The two liquids will be present distinctly in form of two different layers one on the other.The liquid at the bottom is with higher density in comparison to the liquid layer at the top which is with lower density.It is mainly used to separate the layer of organic compounds from the aqueous layer.One way to determine the aqueous layer in the separatory funnel is to add 2-4 drops of water to the separatory funnel and observe in which layer the water drops get invisible that is mixed up.The layer in which water drop mixes will experience a small increase in its volume and that will be the aqueous layer.Water drops will not mix with the organic layer can be easily observed with eyes.So, from this, we can conclude that a method we could use to determine which layer is the aqueous layer is by adding 2-4 drops of water in the separatory funnel.
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Which is the dependent variable in an experiment? 1.what I observe. 2. what I keep the same 3.What I change in the experiment. HELP NOW
Answers
Answer:
1.what I observe.
Explanation:
The dependent variable in an experiment is what is being observed in the experimental procedure.
This variable is the one that is closely tied to the effects originating from changing the independent variables.
Independent variables are the ones that cause the observation being studied. The effects produced and then studied are the dependent variables.Which factors directly affect the magnetic force produced by an electromagnet?
O number of turns in the wire, amount of current
O amount of current, type of force
O length of core, number of turns in the wire
O amount of current, length of core
Answers
Any time a reaction procedure involves separation steps during the workup, it is a good idea to outline a separation scheme.
a. True
b. False
Answers
Answer:
True
Explanation:
Benzene is formed as a result when benzoic acid is generated by Grignard reaction. We must therefore isolate it from the desired benzoic acid compound, as the rest is not dismissed after dissolution in aqueous NAOH solution. Therefore, it a good idea to outline a separation scheme for such cases.
This implies that the given statement is true.
Untitled Section
Which of the following is not a physical change? *
10
A. crushing
B. sublimation
C. rotting
D. deposition
Next
Page 29
Answers
Answer:
B.
Explanation:
Hope this helps.
what happens when you push on the wall of a building?
science force and motion?
Answers
Answer:
the wall pushes back on you with a FORCE equal in strength to the force you exerted.
A cook grabs the handle of the frying pan and their hand gets very warm. The cook's hand gets very warm because of?
a. conduction
b.radiation
c.convetion
Answers
What is radioactive dating in chemistry?
PLEASE HELP!!!
Answers
The general idea is that elements exist naturally as a combination of isotopes. Some isotopes are stable while others decay radioactively. The half-life of a radioactive isotope is the time required to reduce the initial quantity of the isotope by 50% through the process of radioactive decay.
Carbon 14 dating works this way. A tree growing in the past would have an equilibrium mixture of C-12 and C-14 atoms in proportions consistent with living matter today. We know this value.
When that tree dies, it no longer accumulates new carbon atoms from carbon dioxide in the atmosphere (through photosynthesis). At this point, the proportion of C-14 in the organic matter that was the tree decreases due to the decay of C-14 to an isotope of nitrogen.
When we dig up the remnants of the tree today, we can measure the proportion of C-14 to C-12 and see how much it has been reduced. From this we can calculate backwards using the half life of C-14 (5730 years) to estimate how old the remains of the tree are.
Fun With Predicting Reaction Products
I erased my answers so far but i’m confused about every thing on this paper. Pleaseeeee help thanks
Answers
To predict the products of such a reaction, see what happens if the chemical breaks into smaller, familiar products such as water, carbon dioxide, or any of the gaseous elements
Describe the type of reaction that was indicated.AgNO3+Na2SO4→AgSO4+2NaNO3 is an exchange reaction.
Na + O2→ Na2O .
is an exchange reaction.
Thus, we refer to these processes as redox. Na is oxidized by losing electrons in reaction (a), while O is reduced by gaining electrons, forming O2-ions.
A single-displacement reaction would be Mg + HBr > MgBr2 + H2 HBr + Mg. In this process, magnesium creates magnesium bromide by swapping out hydrogen from HBr (MgBr2).
The decomposition process CuSO4(aq) + Zn(s) ZnSO4(aq) + Cu(s) is an illustration.
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What effect does photosynthesis have on Earth’s atmosphere?
i need help who ever helps me will get a Brainliest
Photosynthesis removes both carbon dioxide and oxygen from the atmosphere.
Photosynthesis removes carbon dioxide from the atmosphere and adds oxygen to the atmosphere.
Photosynthesis adds both carbon dioxide and oxygen to the atmosphere.
Photosynthesis removes oxygen from the atmosphere and adds carbon dioxide to the atmosphere.
Answers
Photosynthesis removes carbon dioxide from the atmosphere and adds oxygen to the atmosphere.
Because plants basically breath Carbon and breathe out oxygen
hope this helps :)
How does the reactivity of nonmetals change as you move from left to right across the periodic table?
Answers
Answer:
Metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
Explanation:
I hope this helps :)
Answer:
Explanation:
Non metals increases in reactivity!
CuI2 (light brown solid) name copper compounds
Answers
CuI2 is not a known compound. Copper compounds typically have different oxidation states for copper, resulting in various compound names.
Copper(II) oxide (CuO): It is a black solid compound where copper is in the +2 oxidation state. It is commonly used as a pigment and in catalytic reactions.
Copper(II) sulfate (CuSO4): It is a blue crystalline compound in which copper is in the +2 oxidation state. It is used in various applications such as agriculture, electroplating, and as a laboratory reagent.
Copper(I) oxide (Cu2O): It is a red crystalline compound in which copper is in the +1 oxidation state. It is used as a pigment, in solar cells, and as a catalyst.
Copper(II) chloride (CuCl2): It is a greenish-brown solid compound in which copper is in the +2 oxidation state. It is utilized in various chemical processes, including etching and catalyst synthesis.
Copper(II) nitrate (Cu(NO3)2): It is a blue crystalline compound where copper is in the +2 oxidation state. It is commonly used in the production of catalysts, as a coloring agent, and in electroplating.
These are just a few examples of copper compounds with different oxidation states and properties. It's important to note that the compound CuI2 mentioned in the question, if it exists, would be an exception to the typical nomenclature for copper compounds.
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Cellular Respiration is the process of what? A. Producing oxygen at the cellular level. B. The release of energy from food. C. Breathing. D. The creation of food, powered by the energy of the sun.
Answers
Cellular Respiration is the process of the release of energy from food. Hence, option B is correct.
What is cellular respiration?Cellular respiration is the process by which organisms use oxygen to break down food molecules to get chemical energy for cell functions.
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
Hence, option B is correct.
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