Answer:
2.31 [tex]m[/tex] C₆H₁₂O₆
Explanation:
Hope this helps
The molality of a fructose will be 2.31 M.
What is molality?
The term "total moles of a solute present in a kilogram of a solvent" is used to describe molality. The terms "molality" and "molal concentration"
Molality can be determined by the formula:
Molality = solute (n) / solvent (w) Kg
Given data:
Mass of fructose = 12.9 g
Mass of solvent = 31.0 g
Now, put the value of given data in molality equation.
Molality = 12.9/180 × 31 × [tex]10^{-3}[/tex]
Molality = 0.00231 × [tex]10^{-3}[/tex]
Molality = 2.31 M
Therefore, the molality of a fructose will be 2.31 M.
To know more about molality.
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Why are predictions of natural hazards important?
Answer:
Good predictions and warnings save lives.
Explanation:
Predictions and warnings can also reduce damage and economic losses.
How many millimeters of mercury are in 0.334 atm?
Answer:
253.83996
Explanation:
multiple the pressure value by 760
A/An ______ bond occurs when 2 atoms share electrons.
O ionic
O covalent
O James
O electrical
Answer:
convalent???????
Explanation:
sowwy if it wrong
18. A 35.0 G piece of metal wire is heated and the temperature changes from 21°C to 52°C the specific heat of the metal is 0.900 J/G degrees Celsius how much energy was required to heat the metal please show work
Answer:
Q = 976.5 J.
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the heat in terms mass, specific heat and temperature change, we can write:
[tex]Q=mC(T_2-T_1)[/tex]
Thus, by plugging in the given data, we obtain:
[tex]Q=35.0g*0.900\frac{J}{g\°C} (52\°C-21\°C)\\\\Q=976.5J[/tex]
Regards!
1. Chlorofluorocarbons (CFCs) A carbon-chlorine bond in the CFC molecule can be broken by sunlight, leaving a highly reactive free radical which then goes on to destroy the surrounding ozone molecules. The energy of a C-Cl bond is 328 kJ/mole. Calculate the wavelength of light needed to break a bond in a single molecule. In which region of the spectrum (infrared, visible, UV) does this wavelength fall
Answer: The wavelength for this photon is 365 nm. The wavelength corresponds to UV region.
Explanation:
The relationship between wavelength and energy of the wave follows the equation:
[tex]E=\frac{Nhc}{\lambda}[/tex]
E= energy
N = avogadros number
[tex]\lambda [/tex] = wavelength of the wave
h = Planck's constant = [tex]6.626\times 10^{-34}Js[/tex]
c = speed of light = [tex]3\times 10^8m/s[/tex]
[tex]328\times 10^3J=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8m/s}{\lambda}[/tex]
[tex]\lambda=3.65\times 10^{-7}m=365nm[/tex] [tex]1m=10^9nm[/tex]
Thus wavelength for this photon is 365 nm. The wavelength of 365 nm corresponds to UV region.
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Observe the activity in your classroom. You can observe people, objects, and parts of your actual classroom as you
begin to notice changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter
observation questions to determine if your examples are physical or chemical changes.
Your answer should include the following: two examples, the type of change for each, and how the examples were
formed. You can use this format:
Example 1
Type of Change:
How examples were formed:
Please help me
Answer: Microphones are a type of transducer - a device which converts energy from one form to another. Microphones convert acoustical energy (sound waves) into electrical energy (the audio signal). Different types of microphone have different ways of converting energy but they all share one thing in common! Furthermore, Example 1: Crushing a can.
Type of change:
Developmental – May be either planned or emergent; it is first order, or incremental. ...
Transitional – Seeks to achieve a known desired state that is different from the existing one. ...
Transformational – Is radical or second order in nature.
I have an experiment on a mouse, and this experiment includes arsenic ... but I don't know where to buy it. Please help me. What are the characteristics of arsenic? Please help
Answer:
Arsenic is a semi-metal. In its metallic form it is bright, silver-grey and brittle. Arsenic is a well-known poison. Arsenic compounds are sometimes used as rat poisons and insecticides but their use is strictly controlled.
Explanation:
A chemist titrates 0.200 M NaOH, strong base, with 50.00 ML of 0.100 M HCI, strong acid. How many mL of NaOH will be required to titrate to the endpoint
Answer:
25 mL of NaOH
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
HCl + NaOH —> NaCl + H₂O
From the balanced equation above,
Mole ratio of the acid, HCl (nₐ) = 1
Mole ratio of the base, NaOH (n₆) = 1
Finally, we shall determine the volume of NaOH required for the reaction. This can be obtained as follow:
Molarity of the base, NaOH (M₆) = 0.2 M
Molarity of the acid, HCl (Mₐ) = 0.1 M
Volume of the acid, HCl (Vₐ) = 50 mL
Mole ratio of the acid, HCl (nₐ) = 1
Mole ratio of the base, NaOH (n₆) = 1
Volume of the base, NaOH (V₆) =?
MₐVₐ / M₆V₆ = nₐ / n₆
0.1 × 50 / 0.2 × V₆ = 1
5 / 0.2 × V₆ = 1
Cross multiply
5 = 0.2 × V₆
Divide both side by 0.2
V₆ = 5/0.2
V₆ = 25 mL
Thus, 25 mL of NaOH is needed for the reaction
Calculate the number of moles of NO in 4.10 x 1021 molecules of NO.
Answer:
.0068
Explanation:
You divided the number of molecules by 6.022*10^23 (Avagodros Number) to get the number of moles.
how many liters are present in 31.998 g of O2?
Answer:
Explanation:
First calculate how many moles of O2 you have. O is 16g/mole, so O2 is 32g/mole. 50/32 = 1.5625 moles. 1 mole of any gas at stp is 22.4 liters.
1.5625 × 22.4 = 35 liters.
Its been 15 years since I graduated HS, and I still remember how to do this. Do your own homework next time and in 15 years you may be able to do the same.
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On analysis of 3.4 mg of an organic compound, 8.03 g of CO2 and 3.34 g of H2O were obtained. The percentage composition of carbon and hydrogen in the compound are.......................... respectively
Answer: The percentage composition of carbon and hydrogen in the compound are 64.4 % and 10.9 % respectively
Explanation:
Mass of [tex]CO_2[/tex] = 8.03 g
Mass of [tex]H_2O[/tex]= 3.34 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 8.03 g of carbon dioxide, =[tex]\frac{12}{44}\times 8.03=2.19g[/tex] of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 3.34 g of water, =[tex]\frac{2}{18}\times 3.34=0.371g[/tex] of hydrogen will be contained.
Mass of oxygen in the compound = (3.4) - (2.19+0.371) = 0.839 g
percent composition of C =[tex] \frac{\text{mass of C}}{\text{ Total mass}}\times 100= \frac{2.19}{3.4}\times 1000=64.4\%[/tex]
percent composition of H =[tex] \frac{\text{mass of H}}{\text{ Total mass}}\times 100= \frac{0.371}{3.4}\times 1000=10.9\%[/tex]
Thus the percentage composition of carbon and hydrogen in the compound are 64.4 % and 10.9 % respectively
Dust and particulates released in the home may cause
Lung cancer
Increased allergies and respiratory problems
Nausea
Answer:
b) increased allergies and respiratory problems.
Explanation:
i hope this helps!
have a great rest of your day!
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Answer:
Human health effects of dust relate mainly to the size of dust particles. Dust may contain microscopic solids or liquid droplets that are small enough to get deep into the lungs and cause serious health problems. Large particles may irritate the nose, throat and eyes. ... Dust from soil can irritate the respiratory tract.
b. increased allergies and respiratory problems
(a)0.444 Mol of COCl2 in 0.654 L of solution
(b) 98.0 gram of phosphoric acid, H3PO4, in 100 L of solution
(c) 0.2074 g of calcium hydroxide, Ca(OH)2 in 40.00 mL of solution
(d)10.5 kg of Na2AO4.10H2O in 18.60 L of solution
(e) 7.0 x 10-3 Mol of l2 in 100.0 ml of solution
(f) 1.8 x 104 mg of HCL in 0.075 of solution
Answer is in a photo. I can only upload it to a file hosting service. link below!
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A mixture of0.159 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0 L-vessel at 500.0 K, producing a mixture of CO and CO2. The limiting reagent of the below reaction is carbon. For 0.159 moles of carbon, determine the amounts of products (both the CO and CO2) formed in this reaction. Also, determine the amount of O2 remaining and the mole fraction of CO when the reaction is complete.
3C(s)+2O2(g)â2CO(g)+CO2(g).Â
Answer:
Explanation:
The balanced chemical equation of this reaction;
[tex]3C_{(s)} + 2O_2{(g)} \to 2CO_{(g)}+CO_{2(g)} --- (1)[/tex]
Using the Stochiometric ratio of ratio; the product formed will be aligned with the stoichiometric ratio limiting reagent.
Thus, 3 moles of C yields 1 mole of [tex]CO_2[/tex] and 2 moles of CO.
Therefore;
1 mole of C yields 1/3 moles of [tex]CO_2[/tex] and 2/3 moles of CO
0.147 moles of C yields[tex]\dfrac{1 \times 0.159}{3}[/tex] moles of [tex]CO_2[/tex] and[tex]\dfrac{2}{3} \times 0.159[/tex] moles of CO
= 0.053 moles of [tex]CO_2[/tex] and 0.106 moles of CO
Also;
From the above reaction;
3 moles C reacts with 2 moles of [tex]O_2[/tex]
1 mole of C reacts with [tex]\dfrac{2}{3}[/tex] moles of [tex]O_2[/tex]
0.159 moles of C react with [tex]\dfrac{2}{3} \times 0.159[/tex] moles of [tex]O_2[/tex]
= 0.106 moles of [tex]O_2[/tex]
The remaining amount of [tex]O_2[/tex] = (0.117 - 0.106) mol
= 0.011 mol
The mixture comprises of the following after the reaction;
= 0.011 mol excess [tex]O_2[/tex] + 0.053 moles of [tex]CO_2[/tex] + 0.106 mol CO
= 0.17 moles of gas
Thus; moles fraction of CO is;
[tex]= \dfrac{ moles \ of \ CO \ in \ mixture }{total \ moles \ of \ gas \ in \ mixture}[/tex]
[tex]= \dfrac{0.106}{0.17}[/tex]
= 0.624
copper chloride reacts with magnesium but magnesium chloride does not react with copper. Why is this?
Answer:
Mg is highly reactive as compared to that of Copper owing to its periodic position
Explanation:
MG lies in the second column of the periodic table while Cu lies in the 11th column of the periodic table from the left.
The elements in the first two columns are metallic in nature are highly reactive.
In CuCl2 solution, Mg being highly reactive replaces Cu but in MgCl2 solution, Cu being less reactive in nature do not replaces the Mg from the solution.
take it before its gone
Below is a diagram of a man pushing a furniture to the left with 100N of force. Which of the following statements is incorrect?
A.) The furniture does not move if the force of friction is 100N to the right.
B.) The force exerted by the man on the furniture is equal to the force exerted by the furniture on the man.
C.) The force of friction must be lower than 100N for the cabinet to move.
D.) The force exerted by the man and the force of friction must be balanced in order to accelerate it to the left.
Answer:
If I'm not mistake it should be D
Explanation:
Please inform me if im right or wrong.
Which of the following are in our solar system? Select all answers that apply.
A the star Canis Majoris
B Jupiter's Moons
C Andromeda Galaxy
D Earth
E Asteroid Belt
Answer:
hola como esats UwU
Explanation:
yo bien y tu? UwU
what is a derived lipid
Answer: Derived lipids:
Hydrolysis product of simple and compound lipids is called derived lipids. They include fatty acid, glycerol, sphingosine and steroid derivatives. Steroid derivatives are phenanthrene structures that are quite different from lipids made up of fatty acids.
Explanation:
Copper metal reacts with nitric acid according the equation below 3 Cu (s) +8 HNO 3(aq) -...m+3 Cu^ 2+ (aq)+2NO (g) +6 NO 3 (aq)+4 H 2 O 0 What mass of NO (g) will be produced if 8.96 g of copper are reacted wtih excess nitric acid. Be sure to include units.
Answer:
i think it is NO2 and +6 NO 6 that's all I have
How many grams of MnCl2 need to be added to 5 liters of water to make a 0.25 M solution?
Answer:
I think it is 860 g MG Cl2
Explanation:
your welcome
Write down at least one example of ketone with its IUPAC name
Answer:Propanone is the IUPAC name for acetone, and butanone is the name for ethyl methyl ketone.
Explanation:
What must products equal in a chemical equation
Answer:
Reactants
Explanation:
In a chemical reaction, reactants must react to form products, so products are equal to the reactants
A gas sample has a volume of 185 mL at 45°C. What is its volume at 109°C?
Answer:
342 mL
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 185 mL
Initial temperature (T₁) = 45 °C
Final temperature (T₂) = 109 °C
Final volume (V₂) =?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 45 °C
Initial temperature (T₁) = 45 °C + 273
Initial temperature (T₁) = 318 K
Final temperature (T₂) = 109 °C
Final temperature (T₂) = 109 °C + 273
Final temperature (T₂) = 382 K
Finally, we shall determine the final volume of the gas as follow:
Initial volume (V₁) = 185 mL
Initial temperature (T₁) = 318 K
Final temperature (T₂) = 382 K
Final volume (V₂) =?
V₁/T₁ = V₂/T₂
285 / 318 = V₂ / 382
Cross multiply
318 × V₂ = 285 × 382
318 × V₂ = 108870
Divide both side by 318
V₂ = 108870 / 318
V₂ ≈ 342 mL
Therefore, the new volume of the gas is 342 mL
Answer:
342 mL
Explanation:
Hope this helps
which of the following is a good conductor of electricity?
iron
pure water
paper
wood
please help!!!!!
Answer:
Explanation:
Iron is the correct answer
What mass of Na2SO4 (sodium sulfate) is needed to make 2.5 L of 2.OM
solution?
O 1789
O 2849
O 7109
O 356 g
Use the following reaction:
4Fe + 3O2 → 2Fe2O3
If you have 6.8 mol of Fe, how much Fe2O3 (in moles) would you make?
Which of the following reactions best describes the acid-base properties of acetic acid (CH3COOH) in an aqueous solution? O CH3COOH(aq) + 4H2O(l) 4H30+ (aq) + C2024-(aq) (reversible reaction) O CH3COOH(aq) + H2O(l) H3O+(aq) + CH3COO-(aq) (reversible reaction) O CH3COOH(aq) + H2O(1) CH3C00* (aq) + OH(aq) (reversible reaction) -> H2O*(aq) + O CH3COOH(aq) + H2O() CH3COO-(aq) O CH3COOH(aq) + H2O(0) + OH(aq) -> CH3COO(aq)
Answer:
CH3COOH(aq) + H2O(l) ⇄ CH3COO-(aq) + H3O+(aq)
Explanation:
Acetic acid is a weak acid, so it only partially dissociates, hence the reversible reaction. Acids react with water to produce conjugate base and hydronium.
Vines most successfully compete for sunlight in tropical rainforests by _______.
a.
climbing up into the canopy
b.
strangling the trees they grow on
c.
having broader leaves that absorb more light
d.
having thick, woody stems
Answer:
climbing up into the canopy
Explanation:
What is the law of conservation or matter? Please helppppppp.....no links no trolling otherwise I'll report!
May give brainliest to first correct. :)
Answer:
In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves over time. Exact conservation laws include conservation of energy, conservation of linear momentum, conservation of angular momentum, and conservation of electric charge.
Explanation:
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