Answer:
They move in fixed orbits around the nucleus.
Explanation:
In the Bohr model, it shows the electrons moving in fixed paths around the nucleus, making it easier to see and count them.
Answer:
Pretty sure the electrons orbit.
Explanation:
How many grams of Cu would be needed to react with 2.0 mol of HNO3?
3 Cu(s) + 8 HNO3(aq) --> 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H20(1)
Answer: B
Explanation: I just took the quiz :)
Taking into account the reaction stoichiometry, 47.655 grams of Cu is required to react with 2 moles of HNO₃.
Reaction stoichiometryIn first place, the balanced reaction is:
3 Cu + 8 HNO₃ → 3 Cu(NO₃)₂ + 2 NO + 4 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Cu: 3 moles HNO₃: 8 moles Cu(NO₃)₂: 3 moles NO: 2 molesH₂O: 4 molesThe molar mass of the compounds is:
Cu: 63.54 g/moleHNO₃: 63 g/moleCu(NO₃)₂: 187.54 g/moleNO: 30 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Cu: 3 moles ×63.54 g/mole= 190.62 gramsHNO₃: 8 moles ×63 g/mole= 504 gramsCu(NO₃)₂: 3 moles ×187.54 g/mole= 562.62 gramsNO: 2 moles ×30 g/mole= 60 gramsH₂O: 4 moles ×18 g/mole= 72 gramsMass of Cu requiredThe following rule of three can be applied: If by reaction stoichiometry 8 moles of HNO₃ react with 190.62 grams of Cu, 2 moles of HNO₃ react with how much mass of Cu?
[tex]mass of Cu=\frac{2 moles of HNO_{3} x190.62 grams of Cu}{8 moles of HNO_{3} }[/tex]
mass of Cu= 47.655 grams
Finally, 47.655 grams of Cu is required to react with 2 moles of HNO₃.
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2KCI -> K + CI2
balanced or unbalanced pls help
Answer:
unbalanced I know you should know to
Which of the following describes redox in displacement plating?
A) The Metal A ion is oxidized and Metal B is reduced.
B) The Metal A ion is reduced and Metal B is oxidized.
C) Displacement plating does not involve a change in oxidation states.
Answer:
B) The Metal A ion is reduced and Metal B is oxidized.
Explanation:
When we think of electroplating, we often think of a set up in which there is a nonsponteanous reaction driven by the presence of a cell.
However, in displacement plating, a cell is not involved. Metals are chosen based on their respective position in the electrochemical series.
For instance, silver can be coated on copper by immersing the copper rod into a silver ion solution. The copper rod becomes oxidized. The silver ions accept electrons and become deposited on the copper rod.
02. Two great pe birds are morati Both birth have a ne
grams and are flying at 90 kilometers per hou BRASIL
ove the ground, and Bird is lying 25 km above the on
Bird
Answer:
I don't understand the question.
Explanation:
Name two metalloids that are semiconductors.
Answer:
Carbon silicon
Explanation:
They are very common
Hi can someone please help me!
Answer:
a) 2
b) 2
c) 5
d) 5
e) 5
Explanation:
a) There is 1 Ag atom and 1 Cl atom. When there's no subscript number next to an element, it means there is only one.
b) There is 1 Ca atom and 1 O atom.
c) There are 3 Mg atoms (there's a subscript 3 next to Mg) and 2 N atoms.
d) There are 2 Al atoms and 3 O atoms.
e) There are 2 Sc atoms and 3 S atoms.
Which chemicals are reactants?
0: NH₃ + 0 02
0:02 0: N2 + 0:420
A. NH3 and O2
B. O, and H2O
C. N, and H2O
D. NH3 and N2
Which experiences a greater effective nuclear charge in a Be atom, the 1s electrons or the 2s electrons? Explai
The 1s electrons experience a greater effective nuclear charge in a Be atom as compared to 2s electrons due to less distance from the nucleus.
Which type of electrons experience great nuclear charge?Those electrons that are present near to the nucleus of an atom experience great nuclear charge while on the other hand, those electrons that are present far from the nucleus of an atom experience smaller nuclear effect of the nucleus. This is because the force of attraction of protons that is present in the nucleus on the electrons that is present around the nucleus in various orbits. We know that 1s electrons are present near to the protons whereas 2s electrons are present far from the nucleus.
So we can conclude that the 1s electrons experience a greater effective nuclear charge in a Be atom as compared to 2s electrons due to less distance from the nucleus.
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Which element has the smallest atomic radius?
A-Na
B-H
C-Li
D-K
Answer:
B Hydrogen
Explanation: Hydrogen is the smallest element.
Please help with this question
Answer:
D
Explanation:
2 substances react making them 1
Titanium(IV) selenide formula
Answer:
TiSe2
iExplanation:
the iV gives you the charge of the cation (titanium) abd you want enough se to balance out the charge to 0
Give reasons for : The empirical and molecular formulas of methane gas (CH4) are
identical.
Answer:
Because in methane atoms of carbon and hydrogen are present in simplest ratio of 1:4 that can not be simplified further in whole number so its Emperical formula is same as molecular formula.
Explanation:
According to the periodic table, which statement
correctly describes the change from a neutral atom
of an element to its ion?
A. A fluorine atom forms a F-' ion by losing
one electron.
B. A sodium atom forms a Nation by losing
two electrons.
C. A magnesium atom forms a Mg+2 ion by
gaining two electrons.
D. A phosphorus atom forms a p- ion by
gaining three electrons
8) A 13.5 liter balloon is heated from 248 K to 324 K. What will its new
volume be?
Answer:
It's new volume will be approximately 17.637 liters.
Explanation:
When 7.68 g of zinc react with hydrochloric acid, what volume of hydrogen gas will be collected at 20.00C and 740 mm Hg?
Answer:
V ≈ 2.9 L H₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisChemistry - Reactions
Aqueous Solutions and states of matterReaction PredictionChemistry - Gas Laws
Combined Gas Law: PV = nRT
P is pressureV is volume in litersn is amount of moles of substanceR is a constant - 62.4 (L · mmHg)/(mol · K)T is temperature in KelvinsTemperature Conversion: K = °C + 273.15
Explanation:
Step 1: Define
Unbalanced RxN: Zn (s) + HCl (aq) → ZnCl₂ (aq) + H₂ (g)
Balanced RxN: Zn (s) + 2HCl (aq) → ZnCl₂ (aq) + H₂ (g)
Given: 7.68 g Zn, 20.00 °C, 740 mmHg
Step 2: Identify Conversions
Kelvin Conversion
Molar Mass of Zn - 65.39 g/mol
Step 3: Convert
Stoichiometry: [tex]7.68 \ g \ Zn(\frac{1 \ mol \ Zn}{65.39 \ g \ Zn} )(\frac{1 \ mol \ H_2}{1 \ mol \ Zn} )[/tex] = 0.117449 mol H₂
Temp Conversion: 20.00 + 273.15 = 293.15 K
Step 4: Find V
Substitute: (740 mmHg)V = (0.117449 mol)(62.4 (L · mmHg)/(mol · K))(293.15 K)Multiply: (740 mmHg)V = 2148.45 L · mmHgIsolate V: V = 2.9033 L H₂Step 5: Check
We are given 2 sig figs as our lowest. Follow sig fig rules and round.
2.9033 L H₂ ≈ 2.9 L H₂
Which of the following statements best explains the type of chemical reaction represented by Jane's picture?
Answer:
There are no statements. Edit your question and state the statements.
Answer:
There should be a image
Convert 1.60 x 107 cm to mm in scientific notation
please help
Answer:
4.8x10^9
Explanation:
Which of the following organ is NOT part of the Urinary system?
A. Kidney
B. Bladder
C. Brain
D. Urethra
Answer:
Explanation:C
what does fire need to burn
Answer:
Fuel and Oxygen
Explanation:
ionic compounds are electrically neutral overall. therefore, the sum of the charges on the cation and anion in each formula unit must be equal to .
ionic compounds are electrically neutral overall. therefore, the sum of the charges on the cation and anion in each formula unit must be equal to zero
What is ionic compound ?Ions are charged particles that form when an atom (or group of atoms) receives or loses an electron, and ionic compounds are composed of these charged particles. An anion is a negatively charged ion, whereas a cation is a positively charged ion.
The simplest way to determine whether a chemical compound is an ionic compound is to see if it only contains two elements, one of which can be a metal (belonging to either of groups 1, 2, or 3), and the other of which can be a non-metal (from group 5, 6 or 7).Learn more about Ionic Compound here:
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If an object has 25 newtons of force pushing from the left and 26 newtons of force pushing from the right the object will
A.stay in place
B.move right
C. move left
D. Fall over
Answer:
C. move left
Explanation:
The object will move towards the left direction due to the unbalanced forces that are acting on it.
The resultant force on the object will be 1N in the left direction
The resultant force on a body is that singular force that will have the same effect as the different forces that acts on a bodyWhen forces acts in opposite directions, they are subtractedThe object will move in the direction of the one with the greater forceSo;
Resultant force = 26N - 25N = 1N
The body moves 1N to the left
What type of solution is formed when solid sodium hydroxide (NaOH) is dissolved in water?
A) an electrolytic solution, because NaOH will dissociate into ions
B. an electrolytic solution, because NaOH will not dissociate into ions
C) a nonelectrolytic solution, because NaOH will not dissociate into ions
D) a nonelectrolytic solution, because NaOH will dissociate into ions
The statement " an electrolytic solution, because NaOH will dissociate into ions" is correct.
What is electrolytic solution?A solution that contains ions, atoms, or molecules that already have gained or lost electrons and also is electrically conductive is known as an electrolyte solution. They're known as ionic solutions because of this.
NaOH can be considered as electrolyte because sodium hydroxide was soluble in water, it will entirely dissociate into its ions. As a result, it can classify NaOH as a strong electrolyte. When electrolytes are dissolved in water, they form a solution that conducts electricity.
The reaction can be written as:
NaOH (s) + [tex]H_{2}O[/tex] → [tex]Na^{+} +OH^{-} +H_{2}O[/tex]
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Write the names of the following covalent compounds: SiO2
Answer:
Silicon dioxide
Explanation:
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO₂, most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand.
The name of the following covalent compound: SiO₂ is silicon oxide.
What is the name of the covalent compound?The name of the covalent compound is silicon oxide. Note that covalent compounds are known for their ability to share electrons. This is the case with the compound, silicon oxide that shares electrons with oxygen.
In the compound, there are two atoms of oxygen and one atom of silicon.. So, the name of the compound is silicon oxide.
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At 3 atm of pressure, a cylinder with a movable piston contains 2000 ml of gas. If the pressure
is increased to 8 atm and the temperature remains unchanged, what is the new volume of the
gas?
Answer:
V₂ = 750 mL
Explanation:
Given data:
Initial pressure = 3 atm
Initial volume = 2000 mL
Final pressure = 8 atm
Final volume = ?
Solution:
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
3 atm × 2000 mL = 8 atm × V₂
V₂ =6000 atm. mL / 8atm
V₂ = 750 mL
I NEED IT TODAY!!!!! (20 Points)
Base your answer on the information below and your knowledge of chemistry.
Methanol can be manufactured by a reaction that is reversible. In the reaction, carbon monoxide gas and hydrogen gas react using a catalyst. The equation below represents this system at equilibrium.
CO(g) + 2H2(g) CH3OH(g) + energy
State the class of organic compounds to which the product of the forward reaction belongs.
Answer:
I think it belongs to a gas type or a liquid type. not sure
I am sorry if you get it wrong
Explain why non-metals tend to be poor conductors using the term electronegativity.
Explanation:
Components that throughout chemical processes appear to acquire electrons to achieve anions are considered non-metals. These were all elements which are electronegative. Those who are – anti conductors of electricity and heat, fragile and disadvantaged.
How many grams of lithium are in 1.25 x 10^26 atoms of Li?
Mass of Lithium = 1443.73 g ≈ 1.4 kg
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
The number of atoms of Li = N=1.25 x 10²⁶
mol Li(n) :
[tex]\tt n=\dfrac{N}{No}\\\\n=\dfrac{1.25\times 10^{26}}{6.02\times 10^{23}}\\\\n=2.08\times 10^2[/tex]
mass Li (Ar=6.941 g/mol)
[tex]\tt mass=mol\times Ar\\\\mass=208\times 6,941\\\\mass=1443.73~g[/tex]
what element is a F-18 Atom
Answer:
Sodium Fluoride F 18 Injection is a positron emitting radiopharmaceutical, no-carrier added.
Explanation:
Element Name Fluorine
Element Symbol F
Atomic Number 9
Marcel conducts an experiment to test which stain remover works best on mustard stains. He wants to make sure that he does not make mistakes and has correct data in his experiment. What should Marcel do to make sure that his data are correct? conduct a similar experiment with a different washing machine ask other students to conduct related experiments at their homes ask his sibling to conduct the same experiment using his washing machine repeat the experiment several times with the same variable and constants
Answer: Repeat the experiment several times with the same variable and constants.
Explanation: The experimental procedure should be performed many times so as to determine the effect of the stain remover on mustard stain in different conditions and while using different variables such as water and type of machine used. This will tell how useful the stain remover in all conditions provided to check the accuracy of the stain remover.
Hope this help!!! :)
Answer:
C
Explanation:
if his brother does the expire end it is replication if he was to do the same expirement with the same variables then the same outcome would come out
How many electrons are gained in the half-reaction O2 + electrons — 202?
O
A. 2
O
B. 4
o
C. O
o
D. 1
SUBMIT
Answer: B. 4
Explanation:I just took it