Answer:
[H3O+] = 1.4*10^-5 M
pH = 4.85
[OH-] = 7.08*10^-10
Explanation:
As pH is a measure of hydronium H3O concentration, simply substitute [H3O+] into the following equation:
pH = -log[H+]
pH = -log(1.4*10^-5)
pH = 4.853871...
Round to 2-3 sig figs due to only being given data with 2 significant figures
pH = 4.85
One method to get to [OH-] is to turn pH into pOH and then use inverse functions to get [OH-]
pH + pOH = 14
4.85 + pOH = 14
pOH = 9.15
Then to get [OH-] from pOH:
pOH = -log[OH-]
9.15 = -log[OH-]
-9.15 = log[OH-]
10^(-9.15) = [OH-]
7.07945784 * 10^-10 = [OH]
Round based on given significant figures again:
7.08*10^-10 = [OH-]
(Feel free to add any questions & I'll be sure to reply if clarification is needed)
[H₃O]=1.4 x 10⁻⁵
pH = 5 - log 1.4
pOH = 9 + log 1.4
[OH⁻] = 1 x 10⁻¹⁴ : 1.4 x 10⁻⁵ = 7.14 x 10⁻¹⁰
How many atoms is 2.34 moles of titanium?
[tex]1.409 \times {10}^{24} \: \: atoms[/tex]
Explanation:
Convert from moles to atoms:
2.34 mol titanium (Ti)
Determine the amount of substance, n:
n = 2.34 mol
Look up Avogadro's constant, [tex] N_A[/tex] , to find the number of atoms in a mole:
[tex] N_A[/tex] = 6.022×10^23 atoms/mol
Multiply n by [tex] N_A[/tex] to convert to the number of atoms, [tex]N_{atoms}[/tex]:
Precise Answer:
[tex] N_{atoms} [/tex] = n× [tex] N_A [/tex]= (2.34 mol)/1×(6.022×10^23 atoms)/(1 mol) = 1.409×10^24 atoms
Describe briefly a chemical test to identify a sample of each of the following gases in the laboratory. For each test include a short description of the procedure (method) and the expected observations. a) hydrogen gas b) oxygen gas c) carbon dioxide gas
What is the percent by mass of 110.6 g of potassium fluoride (NaF) dissolved in 1500.0 g of
water?
The percent by mass of 110.6 g of potassium fluoride (NaF) dissolved in 1500.0 g of water is 0.073733 %.
What is the mass percentage?The mass percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the mass of the solution, as a whole.
[tex]\rm\;Mass \;percentage =\frac{\;Mass \;of \;solute}{\;Mass \;of \;solution}[/tex]
Calculate the mass percent of potassium fluoride, using the formula:
[tex]\rm\;Mass \;percentage =\frac{\;Potassium \;fluoride}{\;Mass \;of \;Water}[/tex]
[tex]\rm\;Mass \;percentage =\frac{110.6}{1500.0}[/tex]
Mass percentage = 0.073733 %
Hence, the percent by mass of 110.6 g of potassium fluoride (NaF) dissolved in 1500.0 g of water is 0.073733 %.
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how the surface of the early Earth and its atmosphere have changed to
form the surface of the Earth and its atmosphere today,
Answer:
As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes.
Explanation:
CHEMISTRY
A certain reaction is endothermic in the forward direction. The reaction has less moles of gas on the product side. Which of the following stresses would increase the yield of the products (shift right)?
•Decreasing the temperature
•Decreasing the reactant concentration
•Increasing the volume
•Increasing the pressure
answer is either A or D if that helps
Answer:
A
Explanation:
The forward reaction would be favoured as the increase in temperature would cause more heat for the reaction to absorb so the endothermic reaction would be increased.
draw a condensed structure of each of the following
1. 1,2,-propanediol
2. Ethyl methyl ether
3. Dichloromethane
The condensed structure of given compounds are shown in the below image.
What is functional group?Functional group is the specific group which is present in an organic compound gives information about the properties of that compound.
In 1,2-propanediol compound hydroxyl functional group is present on the 1st and 2nd position.In Ethyl methyl ether, ether functional group is present.In Dichloromethane, two atoms of chlorine groups are present.Hence, structure of the given compounds are shown in the below image.
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What is carbon's number of neutron,proton,atomic number,mass number
No. of Neutrons: 6
No. of Protons: 6
Atomic number: 6
Mass No: 12.011 u
The u means atomic mass unit.
Answer:
Everything is 6 except for mass number
Explanation:
neutron is 6
proton number is 6
atomic number is 6
mass number is 12.011 atomic mass units
The pressure on 2.50L of N2O changes from 1 atm to 0.4 atm. What is the new volume?
Answer:
6.25 L
Explanation:
Boyle's law says Pressure and volume are inversely related. One goes up and other goes down (vice versa).
P1 V1 = P2 V2
(2.5) (1) = (0.4) (x)
x= 6.25 L
The answer should make sense because your pressure went from high to low which means your volume should opposite, from low to high, and that's what we see.
Need help solving this want to know either A or B
What volume is occupied by 20.6g of methane, CH4 at 27°C and 1.59 atm?
Please show work :)
Which best describes the reactants and products of photosynthesis
Answer:
Depends on what the answers say.
Explanation:
But from what I know, the equation is:
6CO2 + 6H2O------> C6H12O6 + 6O2
And also that arrow there should mean in the presence of sunlight and chlorophyll.
One of the particles in an atom is the proton. A proton has a radius of
approximately 1.0 x 10-13 cm and a mass of 1.7 x 10-24 g. Determine the density of
a proton. (Hint: Find the volume of the proton and then divide the mass by the
volume to get the density.)
4
(volume of a sphere = ³; π = 3.14)
Answer:
Density = 4.06 * 10^14
Explanation:
Givens
r = 1 * 10^-13 cm
m = 1.7 * 10^-24 grams
Formula
V = 4/3 * pi * r^3
D = m/V
Solution
Put the givens into the formula.
V = (4/3) 3.14 * (1 * 10^-13)^3 Find the value for r^3
V = (4/3) 3.14 * 1 * 10^-39 Find the volume. Indicate divide by 3
V = 1.256 10^-38/3
V = 4.1867 * 10^-39
Density = m / v
Density = 1.7*10^-24/4.1867*10^-39 Do the division
Density = .406 * 10^(-24 + 39)
Density = .406 * 10^15 grams/ cm^3
Answer: Density = 4.06 * 10^14
If 50.2 g of NO and 15.1 g of H2 react, what is the largest amount of ammonia that can be formed?
WILL GIVE POINTS IF HAS EXPLANATION!
Answer:
28.5 g NH₃
Explanation:
You can determine how much ammonia will form by identifying which reactant is the limiting reagent. This can be done by converting each reactant into moles, using the mole-to-mole ratio (after balancing the reaction), then converting ammonia to grams.
2 NO + 3 H₂ --> 2 NH₃ + O₂
Molar Mass (NO) = 14.01 + 16.00 = 30.01 g/mol
Molar Mass (H₂) = 2(1.008) = 2.016 g/mol
Molar Mass (NH₃) = 14.01 + 3 (1.008) = 17.034 g/mol
50.2 g NO 1 mol 2 mol NH₃ 17.034 g
---------------- x --------------- x -------------------- x ---------------- = 28.5 g NH₃
30.01 g 2 mol NO 1 mol
15.1 g H₂ 1 mol 2 mol NH₃ 17.034 g
---------------- x --------------- x -------------------- x ---------------- = 85.1 g NH₃
2.016 g 3 mol H₂ 1 mol
Nitrogen oxide (NO) is the limiting reagent because it produces the smallest amount of product. In other words, it runs out before all of the hydrogen gas (H₂) can be used. This means that the largest amount of ammonia that can be produced is 28.5 grams.
What is the molar mass of MgSO4?
Answer:
120.3676 g/mol
Science!
need helpppppppppppppppppppppppppp with 3
Answer:
13. 8 hrs
12. 8.89 meters per second squared
11. -0.75 meters per second squared
Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.
hope this helps
Answer:
Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation and natural products for our use at no cost. Removal of the wetlands can result in fish disease, dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity and damage to infrastructure through corrosion. The loss of the wetlands introduces invasive species, either intentionally or unintentionally, these species can put pressure on native plants and eventually push them out of their native habitat.
Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation, and natural products for our use at no cost.
Removal of the wetlands can result in fish disease, the dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity, and damage to infrastructure through corrosion.
How are the wetlands being destroyed?
In the last three decades alone, nearly one-third of natural wetlands have been lost to urbanization, agriculture expansion, and pollution. The loss of wetlands in urban areas has been more rapid.
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A gas occupies 500.0 mL at 30.00°C and 70.00 kPa. What will the volume be at SC?
Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.
What is combined gas law?Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
P₁V₁/T₁ = P₂V₂/T₂
Given the data in the question;
Initial volume V₁ = 500mL = 0.5LInitial pressure P₁ = 0.690846atmInitial temperature T₁ = 30.00°C = 303.15KAt Standard conditions for temperature and pressure
Final pressure P₂ = 1.0atmFinal temperature T₂ = 273.15KFinal volume V₂ = ?To calculate the new volume the gas, we substitute our given values into the expression above.
P₁V₁/T₁ = P₂V₂/T₂
P₁V₁T₂ = P₂V₂T₁
V₂ = P₁V₁T₂ / P₂T₁
V₂ = ( 0.690846atm × 0.5L × 273.15K ) / ( 1.0atm × 303.15K )
V₂ = 94.3522925LatmK / 303.15atmK
V₂ = 0.31L
V₂ = 310mL
Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.
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Explain
Tell if each statement is true or false. Explain your choice.
4. Water can take only one path through the water cycle.
This statement is ______________ because _____________________________________
______________________________________________________________
5. What is the role of the sun in the water cycle?
(23 points)
There are so many routes by which water can move through the various stages in the water cycle.
What is the water cycle?The water cycle has to do with the route of movement of water in the enviroment. We have to note that there are so many routes by which water can move through the various stages in the water cycle.
The sun supplies the energy that drives the water cycle. This is seen in the fact that the supply of energy from the sun is required for evaporation to take place.
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How much heat is required to raise the temperature of 1.5 x 103 g of water from 5 °C to 50 °C? The specific heat of water is 4.184 J/g °C.
Answer:
282420J
Explanation:
Q = mc∆T
= 1500 x 4.184 x (50 - 5)
= 282420J
A path along which electric charges flow is called
a?
Answer:
its an electric circuit
Explanation:
is a pathway in which current flows through.
Br2 + NaCl → NaBr + Cl2
Answer:
NaBr is a reducing agent, Cl 2 is an oxidizing agent. ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Explanation:hope its help
At 25°C and 1.0 atm, 0.84 g of a gas dissolves in 2.00 L of water. What mass of the gas dissolves
in 1.00 L of water at 25°C and 3.0 atm?
The mass of the gas dissolved in 1.00 L of water at 25°C and 3.0 atm is equal to 1.26 grams.
How to determine the mass of the gas dissolved?In order to determine the mass of the gas dissolved, we would the calculate the new (final) solubility of this gas by applying this formula:
S₁P₂ = S₂P₁
Making S₂ the subject of formula, we have:
S₂ = (S₁P₂)/P₁
S₂ = (0.42 × 3.0)/1.0
S₂ = 1.26 g/L.
Now, we can determine the mass:
Mass = solubility × volume
Mass = 1.26 × 1.00
Mass = 1.26 grams.
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According to the chart of specific heats, which material requires the most heat to raise its temperature from 10°C to 30°C?
Answer
A
Aluminum
B
Oil
C
Glass
D
Gold
The material which requires the most heat to raise its temperature from 10°C to 30°C is oil.
What is the formula to calculate absorbed heat?The formula which we used to calculate the amount of involved heat in relation with specific heat is:
Q = mcΔT, where
Q = absorbed heatm = massc = specific heatΔT = change in temperatureAmong the given materials, specific heat of oil is highest than other materials so will require maximum absorbed heat.
Hence, oil requires the most heat.
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__N2O5+__H2O->__HNO3
What's the reaction?
Answer:
N₂O₅ + H₂O --> 2HNO₃
This reaction is a combination reaction
Explanation:
I find that making a table is an easy way to balance a table. The table would be something like this:
Reactants (left) Products (right)
N = 2 N = 1
O = 6 O = 3
H = 2 H = 1
The number next the symbol represents how many of atoms of that particular element are present.
The aim is to make the number of atoms of each element on the left side to be equal to the number of atoms of each element on the right side. As we can see, there are 1 more nitrogen than on the right, 3 more oxygen than on the right and 1 more hydrogen than on the left.
So to make the numbers of atoms of each element on right equal to the number of atoms of each element on the left, we have to add a number. This number CANNOT be a subscript number because that would change the reaction.
We can add a 2 in front of the product (this is because there are less atoms in the right side of the equation).
N₂O₅ + H₂O --> 2HNO₃
This means there are now two HNO₃ molecules so every atom in this molecule is basically multiplied by 2. So 1 nitrogen atom becomes two (1 × 2 = 2), 3 oxygen atoms become 6 (3 × 2 = 6) and 1 hydrogen atom becomes 2 (1 × 2 = 2). If we were to make a table again with the following equation - N₂O₅ + H₂O --> 2HNO₃, the table would be as so:
Reactants (left) Products (right)
N = 2 N = 2
O = 6 O = 6
H = 2 H = 2
Now the equation is balanced as we can see the number each type of atom is the same on the right and left side.
A gas at a volume of 9 liters is at a pressure of 6 atm. The volume is changed to 12 Liters, what must the new pressure be?
Boyle's Law
P₁V₁=P₂V₂
6.9 = P₂.12
P₂ = 4.5 atm
Look at the following atom:
How many protons does this Beryllium have?
How many neutrons does this Beryllium have?
How many electrons does this Beryllium have?
Answer:
p= 4
e=4
n=5
Explanation:
Predict the products if Calcium Carbonate reacts with Silver Sulfate.
CaCO3 + Ag2SO4 ?
-
1
2
The products obtained when Calcium Carbonate reacts with Silver Sulfate is Calcium Sulfate and Silver Carbonate , CaSO₄ + Ag₂CO₃
What is a Double Dispalcement Reaction?The reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.
Many double displacement reactions occur between ionic compounds that are dissolved in water.
In a double displacement reaction, atoms from two different compounds switch places.
The reactants are two compounds and the products are two different compounds.
The reaction given below is an example of Double Dispalcement Reaction
CaCO₃ + Ag₂SO₄ → CaSO₄ + Ag₂CO₃
1 mole of Calcium Carbonate reacts with Silver Sulfate to form 1 mole of Calcium Sulfate and Silver Carbonate , CaSO₄ + Ag₂CO₃.
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I Need help!!!!!!!!!
Answer:
Green=2.81
Yellow=10^-5
Explanation:
It is the correct answer. the exponent power will become 10^-4 without any calculations
When would a transformation of chemical energy to electrical energy occur?(1 point)
when the current becomes zero
when a reaction produces the same products
when there is chemical reaction between metals and nonmetals
\
when electrons stop moving between atoms
A transformation of chemical energy to electrical energy occurs when there is a chemical reaction between metals and nonmetals.
What is electrical energy?The movement of electrons from one atom to another is what results in electrical energy.
A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.
Hence, option C is correct.
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How many moles of LiMnO4 are in 0.107 Lof 2 M solution?
Answer:
There are 20. mol of Na2CO3 in 10.0L of 2.0M solution.
Explanation:
Molarity is represented by this equation:
(look at attachment)
In our case, we already have the molarity and volume of solution, both of which have good units.
Let's rearrange the equation to solve for the number of moles. We can do this by multiplying by L solution on both sides of the equation. The L solution will cancel out on the right side, leaving the number of moles being equal to the molarity times volume:
Moles of solute
=Lsolution×Molarity
Now we just plug the known values in!
Moles of solute = (10.0 L) (2.0M) = 20. moles
