Answer:
1s22s22p63s1 is the electronic configuration of sodium.
Explanation:
There are 11 electrons in Sodium ( find this on the periodic table).
Then you need to arrange the electrons in the orbitals around the nucleus.
The structure would be written as A. 1s^22s^22p^63s^1
In the equation below, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas.
Zn + 2HCl → ZnCl2 + H2
Based on the Law of Conservation of Mass, how many grams of hydrogen gas will form?
A:1 gram
B:7 grams
C:19 grams
For apex The answer is b
In the equation Zn + 2HCl → ZnCl₂ + H₂, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas. 7 grams of hydrogen gas will form. Therefore, option B is correct.
What is zinc ?With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is removed, zinc transforms into a shiny-greyish metal that is slightly brittle at normal temperature. It is the first element in the periodic table's group 12
Oysters are the best source of zinc, but it is also abundant in red meat and fowl. Beans, almonds, crab, lobster, whole grains, breakfast cereals, and dairy products are additional excellent sources.
A non-metal hydrogen is displaced by a metal zinc in a single displacement reaction. As a reductant metal, zinc (Zn) dispenses hydrogen (H₂) from an aqueous solution of HCl to produce zinc chloride (ZnCl2) and hydrogen gas (H₂).
Thus, 7 grams of hydrogen gas will form, option B is correct.
To learn more about zinc, follow the link;
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How many molecules are present in 385.55g of NO2?
Final answer:
There are approximately 5.045 x 10^24 molecules in 385.55g of NO2. This is calculated by first determining the number of moles in the given mass using its molar mass and then multiplying by Avogadro's number.
Explanation:
To calculate the number of molecules in 385.55g of NO2, we first need to determine the number of moles of NO2 in the given mass. The molar mass of nitrogen dioxide, NO2, is calculated as follows:
M(NO2) = 14 +(2)(16) = 46 g/mol
Then, we use the molar mass to convert grams to moles:
Number of moles of NO2 = mass (g) / molar mass (g/mol)
= 385.55g / 46 g/mol
= 8.381 mol of NO2
Afterward, we use Avogadro's number, which is 6.022 x 1023 molecules per mole, to find the total number of molecules:
Number of molecules = Number of moles × Avogadro's number
= 8.381 mol × 6.022 x 1023 molecules/mol
≈ 5.045 x 1024 molecules of NO2
what is the total number of moles present in a 526.0-gram sample of NaNCO3(s)?
Answer:
6.26 mol.
Explanation:
We have the relation:no. of moles (n) = mass/molar mass.
mass of NaHCO₃ = 526.0 g, Molar mass of NaHCO₃ = 84.007 g/mol
∴ no. of moles (n) of NaHCO₃ = mass/molar mass = (526.0 g)/(84.007 g/mol) = 6.26 mol.
What is the charge of the neutron
Answer:
Neutral (no net charge)
Explanation:
Protons - Positive
Electrons - Negative
Neutrons - No charge
Why?
Neutrons are the particle in an atom with a (as the name suggests) neutral charge. They are neither positive nor negative, unlike protons or electrons.
How do greenhouse gases in the atmosphere affect Earth’s temperature?
this is for my written response
Answer: The greenhouse gases cause Earth's surface to heat up from the sunlight.
Explanation: The greenhouse gases causes the Earth's surface to warm up in the morning and at night, the surface cools down. When it cools down, that gives the heat a chance to get back into the air, but some of the heat is trapped (which is caused by the greenhouse gases). That's why, on average, Earth stays at 58 degrees Fahrenheit.
Which structural feature will differ among an ester, an alcohol, and an aldehyde, regardless of which examples are being compared?
the functional group
the branching pattern of the carbon chain
the number of carbon atoms
Answer:
The functional group
Explanation:
A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.
Answer: the functional group
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
1. Esters have functional group [tex]-O=C-OR[/tex].
Example: methyl ethanoate with molecular formula [tex]CH_3COOCH_3[/tex]
2. Alcohols have functional group [tex]-OH[/tex].
Example: Propanol with molecular formula [tex]CH_3CH_2CH_2OH[/tex]
3. Aledydes have functional group [tex]-O=CH[/tex].
Example: propanal with molecular formula [tex]CH_3CH_2CHO[/tex]
Thus esters , alcohols and aldehydes may have same number of carbon atoms and similar branching pattern but different functional groups.
Ethene reacting with hydrogen gas would produce...
Your answer:
propane
ethane
ethyne
Answer:
Ethene reacting with hydrogen gas would produce ethane .
Explanation:
Hydrogenation of alkene gives alkane.
Hydrogenation of ethene gives the saturated hydrocarbon "ethane".
According to the equation:
C₂H₄ + H₂ → C₂H₆.
Write 40% as a fraction in simplest form.
Answer:
2/5
Explanation:
Make 40% to 40/100 simplify by dividing by 10 to 4/10 then simplify again by dividing by 2 to make 2/5
Baseball player throws a baseball ball travels 35 m in five seconds what is the average speed of the ball
Answer:
7
Explanation:
divide 35 by 5 and you get 7
or do inverse operation 7 x 5 = 35
Answer:
[tex]\boxed{\text{7 m/s}}[/tex]
Explanation:
The formula for average speed is
[tex]\text{speed} = \dfrac{\text{distance}}{\text{time}}\\\\s = \dfrac{d}{t}[/tex]
Data:
d = 35 m
t = 5 s
Calculation:
[tex]s = \dfrac{\text{35 m}}{\text{5 s}} = \text{7 m/s}[/tex]
The average speed of the ball is [tex]\boxed{\textbf{7 m/s}}[/tex]
Please can any one help me by answering this question!!+ignore my answer!,
I have posted the answetr in this picture.
Many chefs today are taught using a culinary arts book written in 1903. True False
Many chefs today are taught using a culinary arts book written in 1903.
This Is "TRUE"
True penn foster student also a job corps student ik cause my teacher told me this
Explanation:
how many moles of iron chloride are produced when 6 moles of chlorine gas react with excess iron
Answer:
12.0107
Explanation:
Hope this helps!
Block mountains form along which type of geological landform?
A. Fault blocks
B. The asthenosphere
C. Rift valleys
D. Orogenic belts
Answer:
A. Fault blocks
Explanation:
The block mountains are formed by pieces of the crust that breaks down and pieces are pushed up by the movement of the crust around them. These type of mountains usually have a steep and a slope side, due to the irregular nature of the fracture. Example of such mountains are the Sierra Nevada mountains in North-America.
They're not caused by the collision of two tectonic plates, like most of the mountains of our planet.
Answer: A. fault blocks
Explanation: Fault-block Mountains - Fault-block mountains are formed along fault lines (the edge between plates).
The huge chunks of rock on either side of the fault are called fault blocks. As the tectonic plates
move, some of the fault blocks are pushed up, while others are pushed down. This difference in
elevation (height) forms fault block mountains. The Sierra Nevada Mountains in the western United
States are fault-block mountains.
Which of the following statements is not true?
A.) Noble gases are very reactive chemicals.
B.) Noble gases also are called inert gases.
C.) Noble gases are found in group 18.
D.) Noble gases possess a full valence shell
Answer:
D
Explanation:
hope this helps
Answer:
A
Explanation:
Noble gases have a full valence shell, so D is correct.
Inert gases are another term for noble gases, so B is correct.
Noble gases are found in the last column, which is group 18. This makes C correct.
The last one is A, so that must be the one that is incorrect.
I hope this helped and please mark me as brainliest!
Balance the following redox equation, identifying the element oxidized and the element reduced. Show all of the work used to solve the problem.
HNO3 + P yields H3PO4 + NO
Will make brainliest!
Answer:
N is reduced; P is oxidized;
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
Explanation:
Probably the easiest way to balance the equation is to use the ion-electron method.
Step 1. Write the skeleton equation
HNO₃ + P ⟶ H₃PO₄ + NO
Step 2. Separate into two half-reactions.
HNO₃ ⟶ NO
P ⟶ H₃PO₄
Step 3. Balance all atoms other than H and O
Done
Step 4. Balance O by adding H₂O molecules to the deficient side.
HNO₃ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄
Step 5. Balance H by adding H⁺ ions to the deficient side.
3H⁺ + HNO₃ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄ + 5H⁺
Step 6. Balance charge by adding electrons to the deficient side.
3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻
The N atom is reduced because it gains electrons. The P atom is oxidized because it loses electrons.
Step 7. Multiply each half-reaction by a number to equalize the electrons transferred.
5 × [3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O]
3 × [4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻]
Step 8. Add the two half-reactions.
15H⁺ + 5HNO₃ + 15e⁻ ⟶ 5NO + 10H₂O
12H₂O + 3P ⟶ 3H₃PO₄ +15H⁺ + 15e⁻
15H⁺ + 5HNO₃ + 15e⁻ + 12H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻
Step 9. Cancel species that occur on each side of the equation
15H⁺ + 5HNO₃ + 15e⁻ + 2(12)H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻
becomes
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
Step 10. Check that all atoms are balanced.
[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{H} & 9 & 9\\\text{N} & 5 & 5\\\text{O} & 17 & 17\\\text{P} & 3 & 3\\\end{array}[/tex]
Step 11. Check that charge is balanced
[tex]\begin{array}{cc}\textbf{On the left} & \textbf{On the right}\\0 & 0\\\end{array}[/tex]
Everything checks. The balanced equation is
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
If the amount of dark matter and energy is above the critical level, what will happen to the fate of the universe?
The universe will expand at an accelerated rate.
The expansion of the universe will stop, and its volume will remain the same.
The universe will stop expanding and collapse in a big crunch.
The expansion of the universe will slow but continue.
Answer:
I believe it is; The universe will stop expanding and collapse in a big crunch.
I may be wrong though so double check on that.
Explanation:
Answer:
The universe will stop expanding and collapse in a big crunch.
Explanation:
During an experiment, 102 grams of calcium carbonate react with an excess amount of hydrochloric acid. If the percent yield of the reaction was 85.15%, what was the amount of calcium chloride formed?
Answer:
96.31 g.
Explanation:
From the balanced reaction:CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,
1.0 mole of CaCO₃ reacts with 2.0 moles of HCl to produce 1.0 mole of CaCl₂, 1.0 mole of CO₂, and 1.0 mole of H₂O.
We need to calculate the no. of moles of (104 g) of CaCO₃:no. of moles of CaCO₃ = mass/molar mass = (102 g)/(100.08 g/mol) = 1.019 mol.
Using cross multiplication:
1.0 mole of CaCO₃ produce → 1.0 mole of CaCl₂.
∴ 1.019 mole of CaCO₃ produce → 1.019 mole of CaCl₂.
∴ The amount of CaCl₂ produced = no. of moles x molar mass = (1.019 mol)(110.98 g/mol) = 113.1 g.
∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.
Percent yield of the reaction = 85.15%, theoretical yield = 113.1 g.
∴ actual yield = [(percent yield of the reaction)(theoretical yield)]/100 = [(85.15%)(113.1 g)] / 100 = 96.31 g.
Answer:
96.3
Explanation:
took test
What are the two processes underlying this image that turn peat into coal
Answer:
Peatification and coalification
Explanation:
https://energyeducation.ca/encyclopedia/Coal_formation
Answer: Option (D)
Explanation: In order to form coal, two processes might be undergone and they are as follows-
Peatification- It is the process by which the remains of trees and plants undergoes partial decomposition in a swampy type of environment, conserving organic matter. It is the first stage of coal formation.Coalification- It is the process of complete transformation of the dead remains of plants and trees into coal.Thus the correct answer is option (D).
In ___ waves combine so that the resulting wave is bigger than the largest of the original waves?
Answer:
The answer is...
Explanation:
Constructive Interference
Answer:
[tex]\boxed{\text{phase}}[/tex]
Explanation:
When two waves are in phase, their peaks and troughs line up.
They undergo constructive interference, and the amplitude of the resulting wave is larger than either of the individual waves.
In the diagram below, the two red waves are in phase, and they combine to give a new wave (green) with a greater amplitude.
Radiation occurs when
energy is transferred by electromagnetic waves.
Answer:
thermal
Explanation:
I can confirm that the answer you have to type down is thermal.
Convert to standard notation.
1.312 x 10^2
Answer: The answer would be 131.2
Explanation: How I got my answer is quite simple. In order for it to turn into standard notation, it would need to be turned into the answer of an equation. The equation here would be "1.312 x 10^2". 10^2 would be 100. Multiply 100 by 1.312 will make the decimal point move 2 times to the right, so it will end up in front of the 2. That would make the answer 131.2
I hope this info helps! :P
the mass of 2.50 moles of calcium fluoride (CaF2) is how many grams ?
Answer:
195.199grams
Explanation:
Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.
1 mole of calcium fluoride has a mass of 40.08+2×18.99984
=78.0797 grams
if one mole has a mass of 78.0797 grams, then 2.5 moles have:
2.5 moles× 78.0797 grams/mole= 195.1992 grams
Answer:
195
Explanation:
First, calculate the molar mass of CaF2:
Ca: 1 × 40.078 g/mol = 40.078 g/mol
F: 2 × 18.998 g/mol = 37.996 g/mol
40.078 g/mol + 37.996 g/mol = 78.074 g/mol CaF2
Then, convert moles to grams by multiplying the number of moles by the molar mass:
2.50 mol CaF2 × 78.074 g/mol CaF2 = 195 g CaF2
what is the frequency of a wave where 3 wavelenths pass 1 second
Answer:
3 Hz
The frequency is three waves per second, or 3 Hz.
How can you tell for sure that a redox reaction has happened?
Answer:
Determine the value of the oxidation numbers of atoms or ions on the reactant side and the product side.
Explanation:
A redox reaction involves some ions, and atoms losing electrons and other gaining them in the same reaction. When oxidation occurs, there is loss of electrons by an element thus its oxidation number increases; becomes more positive. When reduction occurs an element gains electrons and the oxidation number becomes more negative; reduces.
If an element (s) behaves in this manner in the whole reaction, then be sure to deduce that a redox reaction has occurred.
Answer:
If oxidation state changes, it is a redox reaction
Explanation:
Consider this equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + . When a small amount of acid is added to this system, which statement is true when equilibrium is reestablished? A. [CH3COO-] and pH have both increased. B. [CH3COOH] and pH have both decreased. C. [CH3COO-] has decreased and pH remains relatively constant. D. [CH3COOH] has decreased and pH remains relatively constant. E. [CH3COO-] has increased and pH remains relatively constant.
Answer:
e
Explanation:
This equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + When a small amount of acid is added to this system,
E. [CH3COO-] has increased and pH remains relatively constant.
What kind of buffer would be a mixture of CH3COOH and CH3COONa?acidic buffer
A mixture of a weak acid and its salt with a strong base serves as an acidic buffer. The reaction shows that some acetic acids react with the OH– from the base and converts it to water.
Which of the following is not a buffer solution CH3COOH CH3COONa?HCl and NaCl. Buffer is an equimolar mixture of weak acid and salt with a strong base.
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How might gull populations be affected
Answer:
Herring might be eaten by anothe kind of fish that gulls eat.
If gas is initially at 350L and 500k then changes to 295K what is the new volume
The answer is:
The new volume is equal to 206.5 L.
Why?To solve this problem, we need to assume that the pressure is constant, and use the Charle's Law equation, so, solving we have:
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
We are given:
[tex]V_1=350L\\T_1=500K\\T_2=295K[/tex]
Then, using the Charle's Law equation, we have:
[tex]\frac{350L}{500K}=\frac{V_2}{295K}[/tex]
[tex]\frac{350L}{500K}=\frac{V_2}{295K}\\\\V_2=\frac{350L}{500K}*295K=206.5L[/tex]
Hence, we have that the new volume is equal to 206.5 L.
Have a nice day!
How would 0.073 be written in scientific notation
Answer:
7.3
⋅
10
−
2
Explanation:
Answer:yo yo
Explanation:
123
PLEASE HELP!!
The table shows the mass and boiling point of some substances.
( I attached a picture of the table )
Part 1: Is the value of M less than, greater than, or equal to the value of N?
Part 2: Explain your answer for Part 1.
Answer: the boiling point of a substance dosent bater how muc hof there it is if there is 100 gallons of water it still boils at 100 c jus takes longer due to more space but if you do 1 gallon it is also 100 c but is faster due to less space to heat up
Part 1:
It appears from the question that M refers to the boiling point of water when the mass is 2, and N refers to the boiling point of Soybean Oil also at a mass of 2. Without the exact figures for M and N given in the question, one can deduce that if both substances have the same mass, N, the boiling point of soybean oil, is greater than M, the boiling point of water. This is because water's boiling point is known to be 100 °C, which is significantly lower than that of soybean oil.
Part 2:
The boiling points of substances heavily depend upon intermolecular forces. Water has a high boiling point relative to its molar mass because of the strong hydrogen bonds between water molecules. However, soybean oil, which consists of long-chain hydrocarbons, likely has different intermolecular forces, such as London dispersion forces, which are stronger due to the larger molar mass and lead to an even higher boiling point.
Therefore, based on our understanding of intermolecular forces and the given information that soybean oil has a boiling point of 300 °C, we can confirm that N is greater than M.
Which of these are components of DNA? Check all that apply.
deoxyribose sugar molecules
ribose sugar molecules
adenine
phosphate molecules
uracil
cytosine
thymine
Answer:
deoxyribose sugar molecules.adenine.cytosine.thymine.phosphate molecules.Explanation:
Hope it helps.
Final answer:
The components of DNA include deoxyribose sugar molecules, adenine, phosphate molecules, cytosine, and thymine. Ribose sugar molecules and uracil are components of RNA, not DNA. DNA is constructed from nucleotides, which are the building blocks containing these components.
Explanation:
Components of DNA
DNA, or deoxyribonucleic acid, is composed of three types of molecules: deoxyribose sugar molecules, phosphate molecules, and nitrogenous bases. The nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. Therefore, the components of DNA that apply from your list are deoxyribose sugar molecules, adenine, phosphate molecules, cytosine, and thymine.
Ribose sugar molecules and uracil are not components of DNA; they are present in RNA (ribonucleic acid), which is another type of nucleic acid involved in protein synthesis and gene expression. DNA utilizes thymine as a base instead of uracil, and the sugar present in DNA is deoxyribose, which differs from ribose by lacking an oxygen atom on the second carbon.
The essential building blocks of DNA are the nucleotides, which consist of a deoxyribose sugar, a phosphate group, and one of the four nitrogenous bases (adenine, guanine, cytosine, and thymine). These nucleotides come together to form the double-helical structure of DNA, which is critical for its functions in storing and transmitting genetic information.