Help me with this question
[tex]\Large \text{1)}[/tex]
[tex]\textbf{Use the formula and substitute the values}[/tex]
[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]
[tex]\textbf{Solve for the number of moles}[/tex]
[tex]n = 0.003\ mol[/tex]
[tex]\textbf{Calculate final volume }[/tex]
[tex]40+10=50\ mL[/tex]
[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]
[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]
[tex]\Large \text{2)}[/tex]
[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]
[tex]\displaystyle DF=\frac{50}{10}=5[/tex]
Plants can cause which type of weathering? physical weathering chemical weathering both physical and chemical weathering
Answer:
Both physical and chemical
Explanation:
Plants are able to release toxins and show withering through stages. When a plant has a certain smell, it means it is going through a chemical change, but when you see a plant turning brown, it goes through a physical change.
Natural resources are distributed ____across the Earth.
Question 2 options:
underground
safely
easily
unequally
Answer:
unequally
Explanation:
this is because many different physical factors vary massively over the earth
Balance the following chemical equation (if necessary):
C5H10O(I) + O2(g) ==> H2O(g) + CO2(g)
Answer:
C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Explanation:
In the original equation: C₅H₁₀O (l) + O₂ (g) --> H₂O (g) + CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 3 oxygen
Products: 1 carbon, 2 hydrogen, 3 oxygen
Cleary, the equation is not balanced. When deciding which element to balance first, avoid balancing elements that are present in more than one molecule on either side (ex. the oxygen on the reactant side). In this case, I started with carbon. Once the carbon was balanced, I balanced the hydrogen, keeping in mind the new coefficients I added when balancing the carbons. Lastly, I balanced the oxygen.
The balanced equation: C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 15 oxygen
Products: 5 carbon, 10 hydrogen, 15 oxygen
Give differences between acids and bases
Answer:
An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons. An acid is a proton donor. A base accepts a proton.Explanation:
9. A strong acid is used as a titrant against a weak base. What would be the most likely pH for the equilibrium point? A.2.1 O B. 7.0 O C.8.2 O D. 6.6
D. 6.6
Strong acid pH range < 3
weak base pH range 8-11
A strong acid is used as a titrant against a weak base. The most likely pH for the equilibrium point will be 6.6.
What is pH?pH, a scale that quantifies the acidity as well as basicity of liquid solutions that are aqueous or other.
What is acid?Any acid which entirely ionizes in solutions would be considered a strong acid. This indicates that when dissolved in a solution, it emits the most hydrogen ions as well as protons.
The pH will not neutral there at an equivalence point when a weak base is compared to a strong acid. The solution is just in fact acidic (pH ≅ 6.6) there at the equivalency point.
Therefore, the correct answer will be option (D).
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If a solution has a concentration of 12 M when the volume is 150 mL. What is the new concentration if you increase the volume to 600 mL? (1
sig fig)
M
Answer:
The idea with diluting a solution is that the number of moles of solute will remain constant after the initial solution is diluted. The only ...
Explanation:
hope it helps you
Radioactive iodine, lodine 131, is used in Thyroid cancer therapies. Its half life is 8
days. If a patients is given a total dose of 1 gram of lodine 131, how much will be
left in the patients blood stream after 32 days? *include units*
PLSS HELP!!
Answer: 0.0625 grams left in the patients blood stream
Explanation:
half life formula: A = o(1/2)^t/d
A represents answer, o represents original amount of iodine used, t represents time iodine is used for, d represnts half life of iodine.
A = 1(1/2)^32/8
A = 0.0625 grams left in the patients blood stream
What is the relationship between the number of molecules and the mass of 22.4 L of different gases at STP?
The volume occupied by one mole of gas at stp is known as the standard molar volume of a gas. It has been found to be 22.41410 L. According to Avagadro's law, one mole of any gas will occupy the same volume as one mole of any other gas at the same temperature and pressure, despite mass difference. Knowing the volume of gas, you can use 1 mol/22.4L as a conversion factor to find the number of moles, and therefore the mass, of a given volume of a given gas at STP.
Behaviour of gases:
In gases, the molecules are far apart and mutual interaction amongst the molecules are negligible except when they collide.At low temperature and high pressure, the gases follow a simple reaction:ㅤㅤㅤ ➝ PV = KT
Please answer this question according to the image below
for the molecule shown below, please answer the following questions.
1. how many carbon atoms are there?
2. how many p-orbitals are involved in π bonds in this molecule?
3. how many Ione pairs of electrons must be added?
4. how many formal positive charges must be added?
When we show the structure of a molecule, we see the arrangement of atoms in the molecule.
Structure of moleculesThe structure of a molecule shows the arrangement of atoms in the molecule.
1) There are 24 carbon atoms in the molecule.
2) There are 30 p- orbitals that are involved in pi bonds in the molecule.
3) We need to add 22 lone pairs of electrons
4) We do not need to add any formal positive charge to the molecule.
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What is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution
Answer:
6.00 Ml
Explanation:
I hope this helps
What is the name for Mg2PO3?
PLEASE HELP ME ASAP SCREENSHOT DOWN BELOW
Answer:
Elevation.
Explanation:
Although latitude is a very important factor in temperature, Las Vegas and Mt. Charleston are pretty close to each other, which makes me think that elevation would be the only thing that could explain the extreme difference in temperature.
How many cookies are there in one mole of cookies?
what's the full question so i can give you an answer?
A solution of sodium oxalate (Na 2C 20 4) in acidic solution is titrated with a solution of potassium permanganate (KMnO 4) according to the following
balanced chemical equation:
2KMnO4(aq) + 8H2SO4(aq) + 5Na2C204(aq) 2MnSO4(aq) - 8H20() +10C02(9) + SNa2SO4(aq) + K2SO4(aq)
What volume of 0.0206 M KMnO4 is required to titrate 0.176 g of Na2C204 dissolved in 50.0 mL of solution?
O a. 8. 54 ml
O b. 500 ml
OC 25 5 ml
O d.3.42 m
e. 63 8 ml
X
The volume of 0.0206 M KMnO₄ required to titrate 0.176 g of Na₂C₂O₄ dissolved in 50.0 mL of solution is 25.5 mL (Option C)
How to determine the mole of Na₂C₂O₄Mass of Na₂C₂O₄ = 0.176 gMolar mass of Na₂C₂O₄ = 134 g/mol Mole of Na₂C₂O₄ =?
Mole = mass / molar mass
Mole of Na₂C₂O₄ = 0.176 / 134
Mole of Na₂C₂O₄ = 1.313×10¯³ mole
How to determine the mole of KMnO₄2KMnO₄ + 8H₂SO₄ + 5Na₂C₂O₄ —> 2MnSO₄ + 8H₂O +10CO₂ + 5Na₂SO₄ + K₂SO₄
From the balanced equation above,
5 moles of Na₂C₂O₄ reacted with 2 moles of KMnO₄
Therefore,
1.313×10¯³ mole of Na₂C₂O₄ will react with = (1.313×10¯³ × 2) / 5 = 5.252×10¯⁴ mole of KMnO₄
How to determine the volume of KMnO₄Mole of KMnO₄ = 5.252×10¯⁴ moleMolarity of KMnO₄ = 0.0206 MVolume of KMnO₄ =?Volume = mole / molarity
Volume of KMnO₄ = 5.252×10¯⁴ / 0.0206
Volume of KMnO₄ = 0.0255 L
Multiply by 1000 to express in mL
Volume of KMnO₄ = 0.0255 × 1000
Volume of KMnO₄ = 25.5 mL
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A sample of neon gas has a volume of 10.0 L at 500, mm Hg. What new pressure is needed to change the
volume to 6.0 L? (T constant).
Hence, the new pressure of the neon gas is 833.3 mm Hg.
To calculate the new pressure, we apply Boyle's law
Boyle's lawBoyle's law state that, at a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.
Formula:
PV = P'V'..............Equation 1Where:
P = Initial pressure of neon gasV = Initial volume of neon gasP' = Final pressure of neon gasV' = Final volume of neon gasMake P' the subject of the equation
P' = PV/V'............ Equation 2From the question,
Given:
V = 10 LP = 500 mm HgV' = 6 LSubstitute these values into equation 2
P' = 10(500)/6P' = 5000/6P' = 833.3 mm HgHence, the new pressure of the neon gas is 833.3 mm Hg.
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The pH of a basic solution is 9.77. What is [OH⁻]?
The [OH⁻] of the solution is 5.37×10⁵ M.
What is pOH?This is the negative logarithm to base 10 of hydroxy ion [OH⁻] concentration.
To calculate the hydroxy ion [OH⁻] concentration we use the formula below.
Note:
pH+pOH = 14pOH = 14-pHpOH = 14-9.77pOH = 4.27Formula:
[OH⁻] = 1/[tex]10^{pOH}[/tex]................. Equation 1Given:
pOH = 4.27Substitute the value into equation 1
[OH⁻] = 1/[tex]10^{4.27}[/tex][OH⁻] = 5.37×10⁵Hence, The [OH⁻] of the solution is 5.37×10⁵ M.
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The concentration of the hydroxide ion [OH¯] in the solution is 5.89×10¯⁵ M
How to determine the pOHFrom the question given above, the following data were obtained:
pH = 9.77pOH =?pH + pOH = 14
9.77 + pOH = 14
Collect like terms
pOH = 14 – 9.77
pOH = 4.23
How to determine [OH¯]pOH = 4.23Concentration of Hydroxide ion [OH¯] =?pOH = –Log [OH¯]
4.23 = –Log [OH¯]
Multiply through by –1
–4.23 = Log [OH¯]
Take the anti-log of –4.23
[OH¯] = anti-log (–4.23)
[OH¯] = 5.89×10¯⁵ M
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finish the equation. must be balanced with phases. please help
Answer: 2Li+(aq) + SO42-(aq) + Ca2+(aq) + 2NO3-(aq) = 2Li+(aq) + 2NO3-(aq) + CaSO4(s)
Explanation:
Li2SO4 + Ca(NO3)2 → LiNO3 + CaSO4
Lithium Sulfate + Calcium Nitrate = Lithium Nitrate + Calcium Sulfate
Balanced:
Li2SO4 + Ca(NO3)2 → 2LiNO3 + CaSO4
Write the state for each molecule if as aqueous, solid or liquid. All nitrates are normally soluble and sulfates are also soluble with few exceptions which are partially soluble.
2Li+(aq) + SO42-(aq) + Ca2+(aq) + 2NO3-(aq) = 2Li+(aq) + 2NO3-(aq) + CaSO4(s)
(05.03 LC)
How many atoms of hydrogen are there in one molecule of water, if the chemical formula is H2O?
OO
오
01
02 03
Formation of Ionic bond
1. Formation of magnesium fluoride.
Answer:
Magnesium fluoride is prepared from magnesium oxide with sources of hydrogen fluoride such as ammonium bifluoride: MgO + (NH4)HF2 → MgF2 + NH3 + H2O. Related metathesis reactions are also feasible. The compound crystallizes as tetragonal birefringent crystals.
How many atoms are in a sample of iron weighing 14.56 g?
Do not report units in your answer. Report your answer in scientific
notation, with two places past the decimal point.
Answer:
1.570065717611
Explanation:
atomic mass and grams of sample, this gives you he amounts of atoms
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Thanks so much
again could someone help me on this?
Answer:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Explanation:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Sodium is metal or nonmetal
Answer:
sodium is a metal,It's known as soft and silvery.
which weather would create the largest surfing waves?
Answer:
I think It Is C
Explanation:
Im really sry if i am wrong
Which is not a physical property?
ability to combine with hydrogen
hardness
ability to conduct electricity
bolling point
Answer: Ability to combine with hydrogen
Explanation:
The ability to combine with another substance is called reactivity and it is classified as a chemical property, not physical
the number of carbon atoms in 2 moles of carbon?
Answer:
1232.896 carbon atoms
Explanation:
In one mole of carbon, there are 6.02×1023 atoms. So in two moles, there will be : 1.204×1024 .
1232.896 carbon atoms
hope this helps
The molar mass of PdCl2 is The molar mass of PdCl2 is
Answer:
176.9 g/mol
Explanation:
You have to add the molar masses of the constituent atoms. The molar mass of palladium is 106.42 g/mol and the molar mass of chlorine is 35.45g/mol so 106 + 2(35.45) = 176.9 g/mol
Consider the following reaction: 3NH,NO,
Na PO, (NH), PO, + 3NaNO,
Assuming we started with 30 grams of
ammonium nitrate and 50 grams of sodium
phosphate. Which of the reagents is the
limiting reagent?
Answer:
installe mo TRUE ID
Explanation:
bobo ang brainly
How do you think new technology has helped scientists learn about genes and proteins?
Answer:
Advances in Technologies with Relevance to Biology: The Future Landscape
This chapter provides an overview and a perspective on the breadth and types of technologies that may have an impact on the life sciences enterprise of the future, with the understanding that there are inherent difficulties in anticipating or predicting how any of these technologies alone or in combination will alter the nature of the future threat “landscape.”
Rather than attempt to cover the technology landscape in a comprehensive manner, this chapter (1) highlights technologies likely to have obvious or high-impact near-term consequences; (2) illustrates the general principles by which technological growth alters the nature of future biological threats; and, (3) highlights how and why some technologies are complementary or synergistic in bolstering defense against future threats while also enhancing or altering the nature of future threats.
.
Explanation:
1. A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2 What is (i) the molar mass of the element and (ii) name of the element?
1. The molar mass of the element M is 40 g/mol
2. The name of the element is calcium (Ca)
Description of mole
The mole an element is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mass of nitrogen Mass of M = 35.3 gMass of compound = 43.5 gMass of nitrogen =?Mass of nitrogen = 43.5 – 35.3
Mass of nitrogen = 8.2 g
1. How to determine the molar mass of MMass of nitrogen = 8.2 gMolar mass of nitrogen = 14 g/mol Formula of compound = M₃N₂Mole ratio of M to nitrogen = 3 : 2Mass of M = 35.3 gMolar mass of M = y =?Mole of M : Mole of nitrogen = 3 : 2
35.3 / y ÷ 8.2 / 14 = 3 : 2
(35.3 / y) × (14 / 8.2) = 3 / 2
494.2 / 8.2y = 3 / 2
Cross multiply
8.2y × 3 = 494.2 × 2
24.6y = 988.4
Divide both side by 24.6
y = 988.4 / 24.6
y ≈ 40 g/mol
Thus, the molar mass of the element is 40 g/mol
2. How to determine the name of the element Molar mass of element = 40 g/mol Name of element =?From the periodic table, the element having a mass number of 40 is Argon and Calcium. Since argon will not react with nitrogen to produce Ar₃N₂.
Therefore, we can conclude that the element is calcium since it can react with nitrogen as illustrated by the equation
3Ca + N₂ —> Ca₃N₂
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