Answers
Answer:42n
Explanation:
Related Questions
make a prediction about the relationship between electrons and molecular shapes
Answers
Answer:
★ Molecular geometry is described by VSEPR theory, which basically states that electron pairs around a central atom will repel each other, and get as far apart as possible, in three dimensions.
Explanation:
Hope you have a great day :)
What energy is using the telephone?
1.electrical
2.sound
3.thermal
4.light
5.mechanical
Answers
Answer:
electrical
Explanation:
i kinda guessed.
Answer:
electrical energy is changed into sound energy
2NH3(g) <--> N2(g)+3H2(g)
Which is most likely the effect to the forward reaction if there is an increase in pressure of the system?
The reactant surface area increases.
The reaction rate decreases.
The reaction is not affected at all.
The reaction stops completely.
Answers
Answer:
B. The reaction rate decreases.
Explanation:
How is conservation of mass illustrated in this simulation? Explain your answer.
Answers
Answer:
Do part by part
Explanation:
Brenda creates an animation that tells the story of a metal from when it is mined as an ore to when it is used as a shiny, protective coating on a car’s iron bumper.
Which two terms will Brenda most likely use in her animation, and in what order?
“electrometallurgy” followed by “electroplating”
“electrometallurgy” followed by “anodization”
“anodization” followed by “electroplating”
“electroplating” followed by “electrometallurgy”
Answers
Answer: A. “electrometallurgy” followed by “electroplating”
Explanation:
Right on edge :)
Answer:
It would be A. “electrometallurgy” followed by “electroplating”
Explanation:
Electrometallurgy is the reduction of metals from compounds to obtain the pure form of metal using electrolysis. In other words, a process in which ores are converted into the pure form of that certain metal through electrolysis.
Electroplating is a process of depositing a thin layer of metal onto an object in an electrolytic cell for strengthening or decorative purposes.
Also in case you are wondering, anodization is a process that makes the surface of metals resistant to corrosion, making the answers containing this process incorrect.
Hope this helps!
I would appreciate brainliest :)
Given the following equation formats, which form matches a single replacement
reaction?
O AB + CD → AD + CB
O A+B → AB
O A + BC → AC + B
O AB → A+B
Answers
Answer:
The answer is c. A + BC → AC + B
During which changes of state do atoms that connot move past one another becomes free to move?
a. Vaporization and sublimation
b. boiling and deposition
c. sublimation and melting
d. condensation and melting
Answers
Answer:
c. sublimation and melting
Hope it helps...
Have a great day : )
Answer:
Option C is your answer
C. sublimation and melting
Explanation:
hope it helps u ^_^
have a great day/night
rain washing away soil from a hillside
Answers
Answer:
deposition
Explanation:
When a metal reacts with oxygen gas what is the product formed
Answers
Answer:
Metal + Oxygen -> Metal Oxide
Explanation:
It's pretty self-explanatory. However, let me show you an example:
Iron + Oxygen -> Iron Oxide
Iron rusts. When iron rusts, it comes in contact with air to form Iron Oxide, which is rust itself.
Freshwater biomes contain less salt than ocean biomes.
true or false
Answers
true...as it gives home to many of the organisms
10-14 is smaller than 107
Answers
Answer:
it is true because if you subtract 10 - 14 you will get -4 so it is less than 107.
Explanation:
Hope this helps!
(55 points) Please help me with my homework please please help me thanks so much
Answers
Explanation:
the most important observations is the conversion of electrical energy into light energy which performs the function of a lamp
in addition to this there is considerable amount of energy loss in form of heat energy when the electrical lamp is there is production of a result of this is not converted into light energy
Name 2 diatomic molecules.
Answers
That’s more than 2 hopes this answers your question
You dissolve 0.47 g of potassium chloride (KCl) in 700 ml of water.
What is the molarity of the solution?
(From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g)
Enter the value rounded to three decimal places with no units
Will give BRAINLEst
Answers
Answer:
0.009
Explanation:
Molarity, a measure of molar concentration of a substance is calculated thus;
Molarity = number of moles ÷ volume
According to the provided information, mass of KCl = 0.47g, volume of water = 700ml
Using mole = mass/molar mass
Molar Mass of KCl = 39.10 + 35.453
= 74.553g/mol
Mole = 0.47/74.55
Mole = 0.0063mol
Volume of water = 700ml = 700/1000 = 0.7L
Molarity = 0.006/0.7
Molarity = 0.00857
The value of molarity rounded to three decimal places (3 d.p) = 0.009
Weather is caused by the:
mesosphere
stratosphere
troposphere
thermosphere
I WILL MARK BRAINLIST
Answers
3. Consider the reaction of methane, CH4, burning in the presence of oxygen at constant pressure. Given the following equation, how much heat could be obtained by the combustion of 8.0 grams CH4? Given the thermochemical equation: CH4(g)+2O2→CO2(g)+2H2O(l); ΔH0=890.3kJ;
Answers
Answer: 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} CH_4=\frac{8.0g}{16.04g/mol}=0.50moles[/tex]
The given thermochemical equation is:
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex] [tex]\Delta H=890.3kJ[/tex]
According to stoichiometry :
1 mole of [tex]CH_4[/tex] on combustion produce heat = 890.3 kJ
Thus 0.50 moles of [tex]CH_4[/tex] on combustion produce heat =[tex]\frac{890.3}{1}\times 0.50=445.15kJ[/tex]
Thus 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
which part of the red blood cells can you find hemoglobin
Answers
Answer:
The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood. Each human red blood cell contains approximately 270 million of these hemoglobin molecules.
Explanation:
hope this helps(;
Consider this reaction mechanism:
Step 1: C4H9Br C4H9+ + Br- (slow)
Step 2: C4H9+ + OH- C4H9OH (fast)
Which rate law is consistent with the mechanism?
Answers
The slow step is always the rate-determining step. In the slow step, C4H9Br is the only reactant and has a coefficient of 1, so it is first order in the rate law.
Which of the following statements about maintaining a fitness program is ture?
Answers
Answer:
im sorry but you havent posted the pic
Explanation:
What are the reactants in the following reaction?
2FeS + 302 → 2FeO + 2502
iron (II) sulfide and oxygen
iron (II) sulfide and iron (II) oxide
oxygen and sulfur dioxide
iron (11) oxide and sulfur dioxide
Answers
Answer:
Iron (II) sulfide and oxygen
Which of the following organisms carry out photosynthesis?
Answers
Name an example of a molecule
Answers
Answer:
N2 (nitrogen) O3 (ozone) CaO (calcium oxide) C6H12O6 (glucose, a type of sugar)
Answer:
dihydrogen monoxide
dinitrogen monosulfide
What is the mass in grams of 1.00 x 10^12 lead (Pb)
atoms?
Answers
3.44 × 10⁻¹⁰ g Pb
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.00 × 10¹² atoms Pb
[Solve] grams Pb
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Pb - 207.2 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.00 \cdot 10^{12} \ atoms \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ atoms \ Pb})(\frac{207.2 \ g \ Pb}{1 \ mol \ Pb})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 3.44072 \cdot 10^{-10} \ g \ Pb[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
3.44072 × 10⁻¹⁰ g Pb ≈ 3.44 × 10⁻¹⁰ g Pb
Answer:
[tex]\boxed {\boxed {\sf 3.44 *10^{-10} \ g \ Pb}}[/tex]
Explanation:
1. Atoms to Moles
Use Avogadro's Number to convert atoms to moles. This number: 6.022*10²³, tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are atoms of lead.
[tex]\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Multiply by the given number of atoms.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Flip the fraction so the atoms of lead cancel.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {1 \ mol \ Pb}{6.022*10^{23} \ atoms \ Pb}[/tex]
[tex]1.00 *10^{12}*\frac {1 \ mol \ Pb}{6.022*10^{23}}[/tex]
[tex]\frac {1.00 *10^{12}\ mol \ Pb}{6.022*10^{23}} = 1.66057788*10^{-12} \ mol \ Pb[/tex]
2. Moles to Grams
Use the molar mass to convert moles to grams. This can be found on the Periodic Table. For lead it is 207.2 grams per mole.
[tex]\frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
Multiply by the number of moles we calculated.
[tex]1.66057788*10^{-12} \ mol \ Pb* \frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
[tex]1.66057788*10^{-12}* \frac {207.2 \ g\ Pb}{ 1 }[/tex]
[tex]1.66057788*10^{-12}* {207.2 \ g\ Pb}= 3.44071737*10^{-10} \ g \ Pb[/tex]
3. Round
The original measurement of atoms has 3 significant figures, so our answer must have the same. For the number we calculated, it is the hundredth place. The 0 in the thousandth place tells us to leave the 4.
[tex]3.44 *10^{-10} \ g \ Pb[/tex]
How many grams are in 7.32 x 1023 molecules of potassium carbonate (K2CO3)?
Answers
(I leave off the x10^23 because they both will divide out) Use your per
How many grams are in 6.60 moles of ZnO?
Answers
Answer:
6.60 moles of ZnO have 537,108 g.
Explanation:
write an apology letter to your principal telling him why you were not in the mathematics competition.in 4000 words
Answers
a 0.25kg shoe is thrown out a window during a physical class. the shoe attains an acceleration of 9.8m/s before hitting an inspecting individual standing on a sidewalk. how much Force(In Newton's) did the shoe hit with?
Answers
Explanation:
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If there is a link to a previously answered question, be patient. Since the files containing the older answers are rather large, it takes some time (maybe as much as 15 seconds or so) to find the appropriate bookmark.
When magnesium reacts with oxygen, magnesium atoms lose electrons.
What happens to magnesium in this reaction?
A. It is reduced.
B. It is oxidized.
C. It is decomposed.
D. It undergoes redox.
Answers
Answer:
B : it is oxidized .
Explanation:
What is the [SO32-) in the 0.080 M H2SO3 .080 M Solution?
Answers
Answer:
0.080 M
Explanation:
From the question given above, the following data were obtained:
Concentration of H₂SO₃ = 0.080 M
Concentration of SO₃²¯ =…?
The concentration of SO₃²¯, can be obtained as follow:
H₂SO₃ (aq) <==> 2H⁺ (aq) + SO₃²¯ (aq)
From the balanced equation for above,
1 mole of H₂SO₃ produced 1 mole of SO₃²¯.
Therefore, 0.080 M H₂SO₃ will also produce 0.080 M SO₃²¯.
Thus, the concentration of SO₃²¯ is 0.080 M
What number will go in the _?_ below to balance the equation?
3Gr3V2 + O3 --> 3GrO + __?__V
Question 1 options:
A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
G. 9
Answers
Answer:
Option F 6 will be the answer.