Answer:
0.04 M.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
Ba(OH)₂ + H₂SO₄ —> BaSO₄ + 2H₂O
From the balanced equation above,
The mole ratio of acid, H₂SO₄ (nₐ) = 1
The mole ratio of base, Ba(OH)₂ (n₆) = 1
Finally, we shall determine the molarity of Ba(OH)₂ solution. This can be obtained as follow:
Volume of base, Ba(OH)₂ (V₆) = 93.9 mL
Volume of acid, H₂SO₄ (Vₐ) = 15.3 mL
Molarity of acid, H₂SO₄ (Mₐ) = 0.247 M
Molarity of base, Ba(OH)₂ (M₆) =?
MₐVₐ / M₆V₆ = nₐ / n₆
0.247 × 15.3 / M₆ × 93.9 = 1/1
3.7791 / M₆ × 93.9 = 1
Cross multiply
M₆ × 93.9 = 3.7791
Divide both side by 93.9
M₆ = 3.7791 / 93.9
M₆ = 0.04 M
Therefore, the molarity of the Ba(OH)₂ solution is 0.04 M
A large dam was constructed across a river to create a reservoir on one side. This led to the sinking of nearby forests, which
impacted plants and animals and caused a decrease in biodiversity, Trees were also cut down to construct the dam, which led to
increased soil erosion and reduced soil fertility.
A scientist wants to reduce the impact of the dam's construction and improve the biodiversity of the ecosystem. Which solution
should the scientist choose?
A. relocating people to live in the area around the dam
B. planting trees around the reservoir to decrease soil erosion
c. using synthetic fertilizers to improve soil fertility
OD. building a small series of dams on nearby streams
Answer:
B
Explanation:
One of the main problems is the soil erosion reducing the fertitlity of the soil, thus reducing it's chances of the soil helping plant growth, thus reducing biodiversity. The other selections worsen the problem.
Please help ASAP!!!!!!!!!!!!
1) What properties of a supercritical fluid are more similar to those of a liquid than a gas?
2) What properties of a supercritical fluid are more similar to those of gas than a liquid?
3) Why does CO2 need to be a supercritical fluid for the process of decaffeination?
10. What is the mass number, symbol, and
charge of an ion that contains 87 protons,
136 neutrons and 86 electrons?
Explanation:
mass number = sum of protons and neutrons
= 87 + 136
= 223
chemical symbol = Fr
ion charge = +1 (because it has one more proton than electron)
atomic mass number = sum of protons and neutrons
= 87 + 136
= 223
chemical symbol = Fr, ion charge = +1 (because it has one more proton than electron)
What is atomic mass ?Atoms are the basic and smaller units of elements which cannot be broken down further chemically, atoms and elements are organized and represented onto a display called the periodic table.
Atoms are composed of protons, neutrons, and electrons, where protons and neutrons present at the nucleus center of the atom where as electron surrounds the nucleus.
The center of the atom makes up most of the mass of the atom as this is made up of protons and neutrons. Protons are positively charged particle and neutrons have neutral charge, respectively, and each are have a mass of 1 atomic mass unit (amu).
Electrons are negatively charged particle and Amu's are units of measurement for atomic mass, proton and neutron are both equal to 1 amu.
Atomic mass units are based on the masses of protons and neutrons band one carbon atom has only six protons and usually six neutrons in the nucleus.
For more details regarding atomic mass, visit
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HELP
Answer:
c
c
Explanation:
mark me brainliest pls
i am boréd wanna chàt
yeah same I'm bóred too -,-
Answer:
sure hi ...............................
1) HA + H2O <--> H3O+ + A- ....what is HA considered?
O
Acid
Base
Conjugate Acid
Conjugate Base
HELPPPPPP!!!! SHOW WORK
Calculate the pressure exerted by heels of a 100 lb woman in high heels, if the area beneath the heel of each shoe is 0.25 square inch
Answer:
P = 400 Lb/in²
Explanation:
We are given;
Weight of woman; W = 100 lb
Area beneath heel of shoe; 0.25 in²
Now, we want to find pressure.
Formula is;
P = F/A
Where;
F is force exerted by the object which is equal to weight of the object
A is area covered by object
Thus;
P = 100/0.25
P = 400 Lb/in²
Why is energy released when intermolecular bonds form?
Answer:
Forming bonds requires energy
Explanation:
Creating a bond is bringing 2+ atoms into a more stable position.
A 250. cm3 sample of neon is collected at standard temperature and pressure. Assuming the volume remains constant, what would be the pressure of the neon at 44.0°C?
a) 118 b)87.2 c) 0.00 d)290
Answer:
The answer is 118 kPa.
Explanation:
How many moles in 18g of H3PO4?
Answer:
0.184 mol
Explanation:
Look up molar masses for the elements that comprise H₃PO₄:
H = 1.008 g/mol
P = 30.97 g/mol
O = 15.99 g/mol
The molar mass of H₃PO₄ is a weighted sum of these (3 hydrogen + 1 phosphorus + 4 oxygen) that comes out to about 97.99 g/mol.
Then
(18 g H₃PO₄) × (1/97.99 mol/g) ≈ 0.1837 mol
What particle has no electrical charge and is found in the nucleus?
O Proton
O Neutron
O Electron
Answer:
electron is the right answer
Answer:
[tex]\huge\mathfrak\red{Answer...} \\ \\ \huge\mathfrak\purple{neutron} \\ \\ \huge\mathfrak\pink{hope \: it \: helps..}[/tex]
You guys are working hard on this school work... You guys deserve to take a break, come hang out with me.
Answer:
hggggggggggggggggggggggggggggggggggggsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
Explanation:
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
What is a strong base
Suppose that 13g of a nonelectrolyte is dissolved in 0.50 kg of benzene. The
boiling point of this solution is 80.61 °C. The normal boiling point of benzene is
80.10 °C. The molal boiling point elevation constant for benzene is 2.53 °C/m. What is the
molar mass of the solute?
Answer:
128.98 g/Mol
Explanation:
ΔTb = Kb * m * i
Where;
ΔTb = boiling point elevation
Kb = boiling point constant
m = molality of the solution
i = Van't Hoff factor
Hence;
Where molality = number of moles of solute/mass of solvent in Kg
Number of moles of solute = mass/Molar mass
So;
80.61 - 80.10 = 2.53 * 13g/M/0.5 * 1
Where M is the molar mass of the solute
0.51 = 2.53 * 13g/M/0.5
0.51 = 2.53 * 13/M * 1/0.5
0.51 = 32.89/M * 1/0.5
0.51 * 0.5 = 32.89/M
0.255 M = 32.89
M = 32.89/0.255
M= 128.98 g/Mol
the highest concentration of life extorts in the top 200 meters of ocean water what is the most important factor that influences this concentration of life
Suggest a procedure for separating iron shavings from sawdust. Explain why this procedure would work.
Dont send a file i will report you if you do
Answer:
Magnetic separation
Sawdust is a non-magnetic material whereas iron shavings are magnetic. When a magnet is brought near a mixture of iron shavings and sawdust, the iron shavings will be attracted to the magnet while the sawdust will not. Thus, the iron shavings will be separated from the sawdust.
Explanation:
Separation techniques makes use of the differences in the properties of components of mixtures to separate theses components, one from another.
In a moxturemof iron shavings and sawdust, a suitable separation technique would be the use of magnetic separation.
The use of this separation technique is abasednonnthe principle that when a magnetnis brought near to a mixture containing magnetic and non-magnetic materials, the magnetic materials will be separated from the non-magnetic materials due to their attraction to the magnet. Sawdust is a non-magnetic material whereas iron shavings are magnetic. When a magnet is brought near a mixture of iron shavings and sawdust, the iron shavings will be attracted to the magnet while the sawdust will not. Thus, the iron shavings will be separated from the sawdust.
What is the percent composition of YAG (Yttrium Aluminum Garnet). The formula for
YAG is (Y3A15012).
Answer: Y 21.38 % , Al 32.44 % and O 46.16 %
Explanation: Molar mass of YAl5O12 is 88.91 + 5·26.98+12·16
= 415.81 g/mol
m-% ( Y) = 88.91 / 415.81 = 21.38 % , m-% (Al) = 5·26.98 / 415.81 =
32.44 % , rest is Oxygen
which element is extracted from bauxide ore
How many grams of iron (III) oxide are needed?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Oxide, or 159.6882 grams.
Jerry designed a coat that he thinks could keep people dry during a thunderstorm. He created a prototype that looks just like his drawing. What should Jerry do next?
Answer:
The next step is prototype testing
Explanation:
The stages of the design process are;
1) Situation analysis
Paper based research is conducted on the situation to obtain the situation parameters
2) Brief writing
With the situation analysis developed above, the brief of the current situation is put down on paper
3) Problem research
The problem is researched and experimented on with the development of a paper based proof of the possible concept
4) Specification writing
The specifications of the problem are outlined
5) List the possible solutions
The possible solutions are brainstormed and listed
6) Preferred solution selection
The preferred solution is selected based on the constraints in the situation
7) Create working drawing/plan
The working design drawing of the selected solution or concept is completed and evaluated for applicability
8) Building of a prototype
The design is converted into a prototype which is a model of the actual solution
9) Testing of the prototype
The prototype is tested for functionality, for ability to work in the intended situation and/or in the intended system
10) Report writing
A report is made on the outcome of the tests for review before production
Therefore, after the prototype is created, stage 8, the next step is the testing of the prototype stage 9.
No bots!!!!!! When 20.4 g of sodium metal are mixed with chlorine gas, how many g of NaCl are produced?
51.8 g NaCl
Explanation:
2Na(s) + Cl2(g) ---> 2NaCl(s)
20.4 g Na × (1 mol Na/22.9898 g Na) = 0.887 mol Na
0.887 mol Na × (2 mol NaCl/2 mol Na) = 0.887 mol NaCl
0.887 mol NaCl × (58.44 g NaCl/1 mol NaCl) = 51.8 g NaCl
You travel 35 meters in 26 seconds, what is your average speed?
Answer:
1.346 meters per second
Explanation:
You traveled 35 meters in 26 seconds
35 / 26 = avg speed.
35 / 26 = 1.346...
pls can someone mention 5 example of fine chemicals
(1-6) Which of the electron movements shown below (A, B, C, or D) will emit the highest energy light?
A
B
с
D
na3
ng
n=5
n=6
ОА
OB
Ос
OD
Answer:
I would say D (not sure tho)
Explanation:
Student added a strip of aluminium metal in aqueous copper(2)Sulfate but no reaction occured. Suggest a reason why.
Answer:
See Explanation
Explanation:
It is a common observation that a strip of aluminium metal in aqueous copper(II)Sulfate does not show any visible reaction. Aluminium is normally expected to displace copper in solution since it is higher than copper in the electrochemical series.
The reason for this is that aluminium forms an oxide film around its surface which prevents reaction with aqueous copper(II)Sulfate. This oxides film protects the aluminium surface such that it is now unable to react with the aqueous copper(II)Sulfate
the lower the kinetic energy of the solute particles:
Answer:
the higher the kinetic energy
Explanation:
because their will be easy movement of particles.
Can someone help me with this question pls?
Explanation:
frequency = 1 wave/10s = 0.1 Hz
wavelength = 5.8 m
speed = wavelength × frequency
= (5.8 m)(0.1 Hz)
= 0.58 m/s
Calcular las fracciones molares de los componentes de una disolución formada por: 250 g de agua, 50 g de ácido acético y 25 g de cloruro de sodio.
The question is: Calculate the molar fractions of the components of a solution made up of: 250 g of water, 50 g of acetic acid and 25 g of sodium chloride.
Answer: The mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
Explanation:
As number of moles is the mass of substance divided by its molar mass.
Therefore, moles of given species are calculated as follows.
The number of moles of water (molar mass = 18 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{250 g}{18 g/mol}\\= 13.88 mol[/tex]
The number of moles of acetic acid (molar mass = 60.052 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{50 g}{60.052 g/mol}\\= 0.832 mol[/tex]
The number of moles of sodium chloride (molar mass = 58.44 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{25 g}{58.44 g/mol}\\= 0.427 mol[/tex]
Therefore, mole fraction of each component is calculated as follows.
Mole fraction of water:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{13.88}{13.88 + 0.832 + 0.427}\\= \frac{13.88}{15.139}\\= 0.916[/tex]
Mole fraction of acetic acid:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.832}{13.88 + 0.832 + 0.427}\\= \frac{0.832}{15.139}\\= 0.054[/tex]
Mole fraction of NaCl:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.427}{13.88 + 0.832 + 0.427}\\= \frac{0.427}{15.139}\\= 0.028[/tex]
Thus, we can conclude that mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
Anyone know this question
Answer:
Second option. 3
Explanation:
In order to balance a equation you need to have the same amount of atoms/moles in both sides.
Na₃PO₄ + _ HCl → 3NaCl + H₃PO₄
In reactant side we have 3 Na and we have the same amount in product side.
We also have 1 P and 4 O in both sides of the equation.
As we have 3 moles of NaCl in product side, this means we have:
NaCl → Na⁺ + Cl⁻
3 moles of Na⁺ and 3 moles of Cl⁻. In conclussion we need 3 moles of Cl⁻ in reactant side.Then, the stoichiometry of HCl must be, 3.
3 moles of HCl means that we have 3 moles of protons (H⁺).
HCl → H⁺ + Cl⁻
If you see the phosphoric acid, we also have 3 moles of protons.
H₃PO₄ → 3H⁺ + PO₄³⁻
Complete balanced equation is:
Na₃PO₄ + 3HCl → 3NaCl + H₃PO₄
Elements whose properties are between those of metals and solid nonmetals are called:
metals
neutrons
metalloids
nonmetals
Answer:
mettaliods
Explanation:
It has the both property of metal and non metal so it is called mettaliod.
Answer:
metalloids
Explanation:
they are solid at roomtempreture and alloys with metals.
examples boron,silicon,arsenic,tellurium