Answer:
least electronegative or most electropositive from the group is Mr. Lithium
Using the equation below, calculate the approximate moles of oxygen gas (O2) required to completely react with 719.68 moles of aluminum (Al). 4Al (s) + 3O2(g) -----> 2Al2O3(s)
Answer:
539.76 moles of O₂
Explanation:
Equation of reaction:
4Al + 3O₂ → 2Al₂O₃
From the equation of reaction above, 4 moles of Al will react with 3 moles of O₂
We can use mole-concept to find the number of moles of O₂.
4 moles of Al = 3moles of O₂
719.68 moles of Al = x moles of O₂
X = (3 × 719.68) / 4
X = 2159.04 / 4
X = 539.76 moles
539.76 moles of O₂ will react with 719.68 moles of Al
Answer:
[tex]n_{O_2}=959.57molO_2[/tex]
Explanation:
Hello,
In this case, given the reaction:
[tex]4Al (s) + 3O_2(g) \rightarrow 2Al_2O_3(s)[/tex]
Since aluminum and oxygen are in a 4:3 molar ratio, we compute the moles of oxygen that completely react as shown below:
[tex]n_{O_2}=719.68molAl*\frac{3molO_2}{4molAl} \\\\n_{O_2}=959.57molO_2[/tex]
Best regards.
How many moles are in 100g of carbon dioxide?
A.2.27 mol
B.3.51 mol
C. 2.36 mol
D. 1.49 mol
Answer:
A
Explanation:
First, let's find the molar mass of CO₂. This is 12 + 2(16) = 44 g/mole.
Now we can write 100g * (1 mole / 44g) = 2.27 mol, or A. Hope this helps!
Of these four liquids, which has the lowest viscosity? options: A. Pancake syrup at room temperature B. Motor oil that is in the refrigerator C.Liquid mercury at room temperature D. A glass of lemonade at room temperature
Answer: B. Motor oil that is in the refrigerator
Explanation:
Viscosity can be defined as the resistance provided by the fluid against its movement or flow. It restricts the resistance to change in shape or movement of fluid. The water has high viscosity as the water molecules do not restrict movement on the surface.
According to the given problem, motor oil has lowest viscosity because it may contain heavy hydrocarbons, which may restrict its flow also when kept in refrigerator, the bonds between hydrocarbons get compact hence, viscosity decreases.
Answer:
Option C, .Liquid mercury at room temperature
Explanation:
The viscosity of liquid mercury at room temperature is 1.526 cP. While the visocsity of lemonade at room temperature ranges between 15.10 to 17.44 cP. Viscosity of Motor oil kept in the refrigerator is equal to 1328.0 cP. And Viscosity of Pancake syrup at room temperature is 5,000 cp. Hence, out of all the four liquids, mercury has the lowest viscosity
Hence, option C is correct
What is the oxidation half-reaction for this unbalanced redox equation? cr2o72– + fe2+ → cr3+ + fe3+ cr3+ → cr2o72– cr2o72– → cr3+ fe3+ → fe2+ fe2+ → fe3+?
Answer:
6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e
Explanation:
The balanced oxidation half equation is;
6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e
A redox reaction is actually an acronym for oxidation-reducation reaction. Since the both reactions are complementary, there can't be oxidation without reduction and there can't be reduction without oxidation.
The main characteristic of redox reactions is that electrons are transferred in the process. The number of electrons transferred is usually deduced from the balanced reaction equation. For this reaction, the balanced overall reaction equation is;
Cr2O7^2–(aq) + 6Fe^2+(aq) +14H^+(aq)→ 2Cr^3+(aq) + 6Fe^3+ (aq) + 7H2O(l)
It is clear from the equation above that six electrons were transferred. Thus six Fe^2+ ions lost one electron each in the oxidation half equation as shown in the balanced oxidation half equation above.
A balloon containing N2 has 1.70 moles and occupies 3.80L. What will the volume be if the number of moles is increased to 2.60moles?
Help me please
Answer:
5.81L
Explanation:
N1 = 1.70 moles
V1 = 3.80L
V2 = ?
N2 = 2.60 moles
Mole - volume relationship,
N1 / V1 = N2 / V2
V2 = (N2 × V1) / N1
V2 = (2.60 × 3.80) / 1.70
V2 = 9.88 / 1.70
V2 = 5.81 L
The volume of the gas is 5.81L
If the cost of electricity is 8 cents/kWh, how much will it cost to use the light for a whole year (365 days)?
Answer:
$13.8
Explanation:
Answer:
For a 100 watt bulb it would be around 700.8 USD, (648.53 Euros).
Explanation:
Since you did not specify the wattage of the bulb, this would be it. You could manipulate the wattage, and then do the same to the cost. E.G, a 50 watt bulb would be about 350.4 USD.
.
A pure gas that is 14.3% hydrogen and 85,7% carbon by mass has a density of 2.5 g L-' at 0°C and 1 atm
pressure. What is the molecular formula of the gas
Answer:
C
Explanation:
4× CH2 = C4H8
HELP CHEM ASAP PLZZZ!!!! Brainlist
Answer:
True.
Explanation:
The higher the 'Mol Concentration', the stronger the acid or base the substance is. For example...
1 Mol of HCl is less concentrated than 6 Mol HCl.
This is the same with bases:
1 Mol of NaOH is less concentrated than 6 Mol NaOH.
Which answer gives both a positive impact and a negative impact associated with the effects of nitrogen- and phosphorus-enhanced fertilizers?
A- increased algal blooms and damage to drinking water
B- increased plant growth and damage to drinking water
C- increase in denitrifying bacteria and increase in plant growth
D- increase in a limiting resource and increase in denitrifying bacteria
Answer:
The answer is B
Explanation:
Answer:
Which answer gives both a positive impact and a negative impact associated with the effects of nitrogen- and phosphorus-enhanced fertilizers?
1. increased algal blooms and damage to drinking water
Right Answer 2. increased plant growth and damage to drinking water
3. increase in denitrifying bacteria and increase in plant growth
4. increase in a limiting resource and increase in denitrifying bacteria
Explanation:
How many carbon and hydrogen atoms are there?
Answer:
13 carbon and 24 hydrogen
Explanation:
There are 24 hydrogen atoms.
There are 13 carbon atoms.
A neutralization reaction has what two reactants?
A — acid and base
B —- hydrocarbon and water
C— acid and salt
D—hydrocarbon and base
Answer:
it's a, acid and base
Explanation:
a neutralization reaction occurs between strong acids and strong bases and result in the formation of a salt and water
how is the sun classified
Answer: it is classified as a star
Explanation:
The sun is big source of energy but it is still a star
Answer:
the sun is the solar systems biggest star. a moderately large yellow dwarf
1. Why is hot air hot?
Answer:
Explanation:
Radiation from the sun heats the ground, then the ground heats the air by process of conduction. When that happens air temp. and density start to change causing air convection currents. Hope I help.
what happens to the ammonia and hydrogen gases generated in common zinc carbon dry cell..?
Answer:
A zinc- carbon battery dry cell primary that delivers about 1.5 volts of direct current.
Explanation:
hydrogen gas escapes while retaining the aqueous electrotype.
10. You can protect yourself from radiation by
going up to a higher elevation
increasing the time you are exposed
increasing your water intake
getting further away from the radiation source
Answer:
You can protect yourself from radiation by getting further away from the radiation source .
What is the overall reduction potential for the reaction Agt (aq) + Cu(s)——>Ag(s) + Cu2+ (aq)?
-0.46 V
+0.46 V
+0.57 v
+1.14V
Answer:
it should be +0.46 :)
Explanation:
I just took the test and got it right.
Answer:
I think it's +1.14 V, but don't take my word for it..
a) Balance the equation below.
Hg(ONC)2 -----------> Hg + N2 + CO
b.) After decomposition, if you are left with 50.2g of CO, how many grams of mercury fulminate did you start with? (Hint: This problem asks about how many grams of reactant we start with, you can do the problem the same way as if CO was the reactant and Hg(ONC)2 was the product.)
Answer:
254.7 g
Explanation:
Hg(ONC)2 -----------> Hg + N2 + 2CO
In every problem of stoichiometry, we must commence with writing the balanced reaction equation as a guide to our calculation. Once we have written the reaction equation, we can now proceed with the solution.
Amount of CO produced= mass of CO produced/ molar mass of CO
Molar mass of CO = 28 gmol-1
Mass of CO produced= 50.2g
Amount of CO produced= 50.2g/28gmol-1
Amount of CO produced= 1.79 moles of CO
From the reaction equation:
1 mole of Hg(ONC)2 produced 2 moles of CO
x moles of Hg(ONC)2 will produce 1.79 moles of CO
x= 1.79 × 1 / 2
x= 0.895 moles of Hg(ONC)2
Molar mass of Hg(ONC)2 = 284.624 g/mol
Mass of Hg(ONC)2 = number of moles × molar mass = 0.895 moles × 284.624 g/mol
Mass of Hg(ONC)2 = 254.7 g
ipt Which of the following is true about semipermeable membranes?
A. A semipermeable membrane allows passage of solute particles but not solvent particles.
B. A semipermeable membrane allows passage of solvent particles but not solute particles.
C. A semipermeable membrane allows passage of both solvent and solute particles.
D. A semipermeable membrane does not allow passage of either solvent or solute particles.
A solution that has a large amount of dissolved solute is called
Answer: It is an unsaturated solution
Explanation: This is because it has more solute than a normal solution.
According to one acid-base theory a molecule acts as an acid when the molecule
what is the mass of 7.525 x10^24 particles of sulfur difluoride SF2?
Answer:
Mass will be equal to 874.56 gram
Explanation:
Molar mass of sulfur = 32 u
Molar mass of Florine = 19 u
Therefore molar mass of [tex]SF_2[/tex] [tex]=32+2\times 19=70u[/tex]
So mass of [tex]6.023\times 10^{23}[/tex] particle is 70 gram
Therefore mass of 1 particle
[tex]=\frac{70}{6.023\times 10^{23}}=11.62\times 10^{-23}g[/tex]
Therefore mass of [tex]7.525\times 10^{24}[/tex] particle is
[tex]7.525\times 10^{24}\times 11.62\times 10^{-23}=874.56gram[/tex]
Please help No Explanation needed. Its science please
Answer:
C, A, A, B, B
Explanation:
Question 5: C. continental drift
Question 6: A. new rock forms
Question 7: A. happens at deep-ocean trenches
Question 8: B. convection currents in the mantle
Question 9: B. convergent boundary
AgCl is..
A)an element
B)a compound
C.)a mixture
Answer:
(B)
Explanation:
Silver chloride is a simple ionic compound consisting of the silver cation (Ag+) and chloride anion (Cl-).
Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury
Answer: mercury
Explanation: I looked up the answer to your question.
Answer:
Mercury
Explanation:
I did this question and I got it right.
A city is concerned about global warming and smog. It wants to reduce the impact of its use of fossil fuels. Explain how the city could use technology to reduce fossil-fuel use by changing (a) its transportation, (b) its buildings, and (c) services for city residents
Answer:
a) Increasing the toll for non carpoolers will motivate people to carpool and therefore will decrease the number of cars in the road burning fossil fuels.
b) Tax breaks for buildings that use solar panels for energy. This reduces fossil fuels burned for electricity.
c) The city can increase the amount of city transportation available. While this may seem counterproductive because the amount of buses or trains or boats burning fossil fuels increases, by doing this more people will have easy access to public transportation and it has been shown that public transportation is more effective in reducing fossil fuel usage per head. Providing more options of public transportation will increase their usage and therefore will over decrease the amount of fossil fuel burned by individiuals which will overall decrease fossil fuels burning.
Stoichiometry is based on the _______________________________
Answer:
Explanation:
Stoichiometry is based on the conservation of mass.
What is the name of C3H8?
Answer:
Propane
Explanation:
I’ll give Brainliest to the first answer
The amount of elements on the reactants side of an isolated equation are ___________ the amount of __________ that are formed on the ________ side. *
A)close to, ice crystals, cold
B)less than, properties, chemical
C)equal to, elements, products
D)similar, molecules, present
E)more than, elements, products
Answer:
C. equal to, elements, products
Explanation:
I took a quiz and it said this was right
Why is 4,4dimethyl hexane name is wrong
Answer:
3,3-dimethyl hexane
Explanation:
CH3
I I I I I I
- C - C - C - C - C - C-
I I I I I I
CH3
Which of the following contains polyatomic ion?
Oa
BeHCO
Ob
PCI
Ag!
Mgs
