Answer:
121.3 ml
Explanation:
Mole wts
Na 22.989 x 2
C 12.011
O 15.999 x 3 total = 105.986
45 grams is 45/105.986 of a mole
45/105.986 in one liter would be .424584 M
.424585 mole / x liter = 3.5
x = .1213 liter = 121.3 ml
How many grams are in 5.5 moles of H2O
Answer:
99•g
Explanation:
Well, ONE mole of water has a mass of 18.01⋅g⋅mol−1. and 5.5⋅mol has a mass of approx. 99⋅g.
The equation below represents a chemical reaction. Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) A 5.00-g sample of zinc is added to hydrochloric acid. The amount of hydrochloric acid is sufficient to allow the zinc to react completely. What mass of hydrogen gas does this reaction produce? A. 0.0308 g B. 0.0771 g C. 0.121 g D. 0.154 g
Answer:
D
Explanation:
Will give brainliest
sorry i know this:
4. 2 methyl 2 heptene
How many liters of 1.0 M NaCl solution are needed to react with 5 M of the solute
That should be 5mols of solute
Now
Let that volume be V
Molarity=Moles of solute/Volume in L1M=5/VV=5Lwhat volume of N2 is required to convert 5.0L of hydrogen gas to ammonia? assume that all gases are at the same temperature and pressure and that the reaction is complete
Answer:
Approximately [tex]1.7\; {\rm L}[/tex].
Explanation:
Nitrogen [tex]{\rm N_{2}}\, (g)[/tex] reacts with hydrogen [tex]{\rm H_{2}}\, (g)[/tex] at a [tex]1:3[/tex] ratio to produce ammonia [tex]{\rm NH_3}\, (g)[/tex]:
[tex]{\rm N_{2}}\, (g) + 3\; {\rm H_{2}}\, (g) \to 2\; {\rm NH_{3}}\, (g)[/tex].
The ratio between the coefficient of [tex]{\rm N_{2}}\, (g)[/tex] and the coefficient of [tex]{\rm H_{2}}\, (g)[/tex] is:
[tex]\begin{aligned}\frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}[/tex].
Under the ideal gas assumptions, the same ratio would apply to the volume of [tex]{\rm N_{2}}\, (g)[/tex] and [tex]{\rm H_{2}}\, (g)[/tex] in this reaction:
[tex]\begin{aligned}\frac{V({\rm N_{2}})}{V({\rm H_{2}})} = \frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}[/tex].
[tex]\begin{aligned}V({\rm N_{2}})= \frac{1}{3}\, V({\rm H_{2}})\end{aligned}[/tex].
Given that [tex]V({\rm H_{2}}) = 5.0\; {\rm L}[/tex]:
[tex]\begin{aligned}V({\rm N_{2}}) &= \frac{1}{3}\, V({\rm H_{2}}) \\ &= \frac{1}{3}\times 5.0\; {\rm L} \\ &\approx 1.7\; {\rm L}\end{aligned}[/tex].
(Rounded to [tex]2[/tex] significant figures.)
The weak ionization constant (Ka)
for HF is equal to:
[H3O][F]
[HFJ[H20]
[HF]
[F-][H30+]
Please help
Answer:
[tex]\displaystyle K_a = \frac{[\text{H$_3$O}^+][\text{F}^-]}{[\text{HF}]}[/tex]
Explanation:
Write the reaction of HF (a weak acid) with water:
[tex]\displaystyle \text{HF}_\text{(aq)} + \text{H$_2$O}_\text{($\ell$)} \rightleftharpoons \text{H$_3$O}^+_\text{(aq)} + \text{F}^-_\text{(aq)}[/tex]
Recall that the equilibrium constant expression for an equilibrium reaction is the product of the concentration of the products over the product of the concentration of the reactants raised to their respective coefficients.
The equilibrium constant expression for this equation will hence be:
[tex]\displaystyle K_a = \frac{[\text{H$_3$O}^+][\text{F}^-]}{[\text{HF}]}[/tex]
Note that pure solids and liquids are not included in the equilibrium expression.
In conclusion:
[tex]\displaystyle K_a = \frac{[\text{H$_3$O}^+][\text{F}^-]}{[\text{HF}]}[/tex]
A mixture of three gases (N2, Ar, and O2) at 2.6 atm is found to contain 23% N2 and 3.0% Ar by mass. What is the partial pressure of O2
Given that the mixture of the three gases has a pressure of 2.6 atm, the partial pressure of O₂ is 1.924 atm
Dalton's law of partial pressureThis law states that at contact temperature, the total pressure of a mixture of gases is equal to the sum of the partial pressure exerted by each gas. Mathematically, it is expressed as
Total pressure = partial pressure of A + partial pressure of B
How to determine the partial pressure of O₂Percentage of N₂ = 23%Percentage of Ar = 3%Percentage of O₂ = 100 – (23 + 3) = 74%Total pressure = 2.6 atmPartial pressure of O₂ =?Partial pressure of O₂ = (percentage of O₂) × total pressure
Partial pressure of O₂ = 74% × 2.6
Partial pressure of O₂ = 0.74 × 2.6
Partial pressure of O₂ = 1.924 atm
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Microwaves make _________ get hot. They make water molecules _______ against each other. The water molecules turn into ___________ and _____________ the popcorn.
please help
Answer:
food , push , gas , pop
Explanation:
. If 3 moles of calcium reacts with 3 moles of oxygen, then a Which substance is the limiting reactant? b How many moles of calcium oxide are formed?
Let's see the balanced equation
[tex]\\ \rm\Rrightarrow 2Ca+O_2\longrightarrow 2CaO[/tex]
Hence
As moles are equal given
Ca should be the limiting reagent2mol Ca produces 2 mol CaO3mol Ca produces 3mol CaOWhat is the [H+] in a solution with a pH of 9.92
A) 1.2x10^-10 M
B) 9.9x10^-7 M
C) 4.9x10^-5 M
D) 1.1x10^-9 M
Answer:
Total flow: = 1000 cfm = 4.7 x 10 ml/sec. Stack Ht.: 2.7m (9 ft) ... 1.2x10-8. 6.4x10 7. C-14. 4.3x10 7. 1.0x10 5. 2.0x10 8. 1.1x10-8. Na-22. 1.3x1i dont know how to explain it
Which property describes a mixture? select three options. it can be separated by physical methods. it has a single chemical composition. it can appear different from different sources. it cannot be described by a chemical symbol or formula. it cannot have more than one state of matter.
The property of mixture which describes a mixture are it can be separated by physical methods, it can appear different from different sources and it cannot be described by a chemical symbol or formula.
What are mixtures?Mixtures are the compounds which are formed by the addition or combination of one or two elements or compounds.
As in the mixtures many states of matters are present and it will be filtered by using various physical methods, and it is not chemically shown by single chemical symbol or formula. Mixtures are also of two types:
Homogeneous mixtures are those in which equal compositions all over the volume is present.Heterogeneous mixtures are those in which different composition all over the volume is present.Hence options (1), (3) and (4) are correct.
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Cassiterite is an ore of a metal tin. What is an ore?
Answer:
Cassiterite is an ore of Sn.It is also called tinstone and has molecular formula of SnO
2 . It is heavy, metallic, hard tin dioxide that is the major ore of tin. It is colourless when pure, but brown or black when iron impurities are present.
What happens to climate and weather over a summer?
Answer:
summers get hotter, and it can get more sticky or humid sometimes.
Explanation:
think of the seasons and the tempatures.
What is the molarity of a solution that contains 30. grams of naoh in 500. milliliters of solution?.
Answer:
1.5 mol/L
Explanation:
molarity = moles/litres
NaOH = 23 + 16 + 1 = 40 g/mol
[tex] ? \: mol \: naoh \: = 30 \: g \: naoh \: \times \\ \\ \frac{1 \: mol \: naoh}{40 \: g \: naoh} = 0.75 \: mol \: naoh[/tex]
molarity = 0.75 mol NaOH ÷ 0.5 L = 1.5 mol/L NaOH
6. if a cross country runner travels at a speed of 10 mph and he runs for 2 hours, how many miles will he have run at the end of the 2 hours? calculating distance
Explanation:
distance = speed x time
distance = 10 x 2
distance = 20miles
hope that helps :)
If a cross country runner travels at a speed of 10 mph and he runs for 2 hours, 20miles he will have run at the end of the 2 hours.
What is distance?Distance is a description of how far apart two things or points are, either numerically or occasionally qualitatively. Distance can be used to describe a length in physics or to an estimate based on other factors in common usage.
The phrase is widely used metaphorically to refer to a measurement of the degree of distinction between two similar items since spatial intelligence is a rich source of implicatures in human understanding.
distance = speed x time
distance = 10 x 2
distance = 20miles
Therefore, 20miles is the distance.
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Write balanced chemical equations for:
a) coke + oxygen --> carbon dioxide
b) carbon dioxide + coke --> carbon monoxide
Answer:
a. C (s)+ 02(g)---->C02(g)
b. CO2(g) +C(s)--->2CO(g)
Explanation:
This reaction is the method of purification of some precious metals such a iron(Fe) in it's ore. a.The carbon(coke) is oxidized to carbon (IV) oxide
b. the carbon dioxide gas is reduced with the same carbon to produce carbon(II) oxide.
The state of matter represented on the right (letter D) has the
highest energy. Of the four choices shown, which is plasma?
B. B.
A. A
D. D
С. С
Answer:
A is the answer.
Explanation:
gorgeousness
write the name of high quatity of coal
Answer:
Write the name of high quatity of coal
Explanation:
2 H2 + O2 = 2H2O You have 20 grams of H, what's the mass of water?
Answer:
2H2 + O2 —-> 2H2O
The mole ratio of H2 to H2O is 2 : 2 = 1:1
4 moles of H2 = 4 moles of H2O
Moles of H20 = 4mol
Molar mass of H2O = 18g/mol
Mass = moles X Molar mass
= 4mol x 18g/mol
= 72g
Mass of H2O is 72g
Which of the following formulas should be classified as an acid?
O Na₂SO4
O NaHCO3
O NaOH
O H₂SO4
Answer:
D) H₂SO4 is an acid
Explanation:
Please mark branliest
H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.
What is an acid?Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.
The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid.
Therefore, the correct option is option D.
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what is emission spectrum and absorption spectrum?
Answer:
When matter interact with EMR then spectrum is obtained. We can understand both spectra using Bohr's hydrogen spectrum. let's have a look on Bohr's hydrogen spectrum what does it say. It says when a electron gains energy it moves from one energy level to other(lower to higher) which is Absorption phenomenon. When the electrons returns from excited state to ground state they emits several spectral lines. this spectrum is called as emission spectrum. inshort the
Emission spectrum is spectrum of electromagnetic radiations that were emitted from the higher energy state(Excited state) to lower energy state(Ground state). and study of emission spectrum is known as AES (Atomic Emission spectroscopy).
When an atom or ion is subjected to EMR, it absorbs certain level of radiations, and when this absorbed energies are studied under spectroscopy they are plotted as absorption spectrum, and study of Absorption spectrum is known as AAS (Atomic Absorption spectroscopy).
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Which of the following is an oxidation-reduction reaction? so2(g) h2o(l) right arrow. h2so3(aq) caco3(s) right arrow. cao(s) co2(g) ca(oh)2(s) h2co3(l) right arrow. caco3(aq) 2h2o(l) c6h12o6(s) 6o2(g) right arrow. 6co2(g) 6h2o(l)
The reaction which shows oxidation and reduction simultaneously is C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).
What are redox reactions?Those reaction in which oxidation as well as reduction of substances takes place simultaneously will known as redox reactions.
SO₂(g) + H₂O(l) → H₂SO₃(aq)CaCO₃(aq) → CaO(s) + CO₂(g)Ca(OH)₂(s) + H₂CO₃(l) CaCO₃(aq) + 2H₂O(l)Above reaction are not the redox reactions as in these reaction oxidation and reduction simultaneously not takes place.
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)In the above reaction reduction of oxygen takes place as its oxidation state changes from 0 to -2, and at the same time oxidation of carbon takes place as its oxidation state changes from 0 to +4.
Hence correct option is (4).
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Answer:
correct option is (4).
Explanation:
50. g of NaNO3 was dissolved in 1250 mL of water.
What is the molality of the solution? (Molar mass of
NaNO3 = 85 g/mol; Density of water = 1.00 g/mol)
m.
Your answer should be rounded to two significant figures. Do not
include units in your answer.
Answer:
.47
Explanation:
I just took a test that asked this exact same question and I got it right.
What is the mode of action of most antifungal drugs?
inhibition of protein synthesis.
disruption of membranes.
inhibition of RNA synthesis.
destruction of chitin
inhibition of folic acid precursor synthesis
Inhibition of protein synthesis is the mode of action done by most antifungal drugs.
What is the mode of action of antifungal drugs?Antifungals drugs inhibit the synthesis of ergosterol the main fungal sterol, polyenes which interact with fungal membrane sterols and 5-fluorocytosine inhibits macromolecular synthesis.
So we can conclude that inhibition of protein synthesis is the mode of action done by most antifungal drugs.
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Explain why the available amount of water per person differs between countries
Answer:
because in the different countries it is distributed unevenly.
Explanation:
hope this helps
A gas has a volume of 22. 6L at 3. 6 atm. What is the pressure of the gas at 44. 3L
Answer:
1.837 atm
Explanation:
According to Boyle's Law:
[tex]V_{1} P_{1} = V_{2}P_{2}[/tex]
(22.6L) (3.6atm) = (44.3L) (x)
x = 81.36 /44.3
x = 1.837 atm
This is because Volume and Pressure are inversely proportional. If one increases the other has to decrease.
Which lewis dot diagram shows an atom that needs 2 more electrons in its outermost shell?.
Answer:
Fluorine needs two more electrons on the outermost shell.
Explanation:
I'm in K12 too.
write any two conditions due to which demagnetization occur
Answer:
1) because of heating
2) because of hammering
Convert 7.6 × 105 cal to kiloJoules
The temperature of CI2 is changed from 836.06K to 625.06K.if it's new volume is 14.509L what was its original volume in liters
V1= 19.229L
Explanation:
V1/T1 = k
V1/836.06=14.509/625.06
V1/836.06= 0.023
V1 = 19.229L
The temperature of CI₂ is changed from 836.06K to 625.06K. If it's new volume is 14.509L then its original volume in liters was 19.4 L.
What is combined gas law?The combined gas law is the law of of gaseous state which is made by combination of Boyle's law, Charle's law, Avogadro's law and Gay Lussac's law.
It is a mathematical expression that relates Pressure, Volume and Temperature.
(P1 × V1)÷T1 = (P2 × V2)÷T2
We can also use the following relation-
PV = nRT
According to the question, Pressure is constant and we can write the formula as-
V1÷T1 = V2÷T2
T1 = 836.06 K
T2 = 625.06 K
V1 = ?
V2 = 14.509 L
V1 = 19.4 L
Therefore, The temperature of CI₂ is changed from 836.06K to 625.06K. If it's new volume is 14.509L then its original volume in liters was 19.4 L.
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