Answer:
[tex]C_3H_4O_3[/tex]
Explanation:
Hello there!
In this case, according to the given information derived from the combustion analysis, it turns out possible for us to realize that all the carbon comes from the CO2 and all the hydrogen from the H2O, it means we can calculate their moles in the vitamin C as shown below:
[tex]n_C=0.728gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.0165molC\\\\n_H= 0.198gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O}=0.0220molH[/tex]
Next, we calculate the grams and moles of oxygen from the grams of C and H in the sample:
[tex]m_O=0.486g-0.0165molC*\frac{12.01gC}{1molC} -0.0220molH*\frac{1.01gH}{1molH}\\\\m_O=0.266gO\\\\n_O=0.266gO*\frac{1molO}{16.00gO} =0.0166molO[/tex]
Then, we divide the moles of C, H, O by 0.0165 as the fewest moles in order to calculate the correct mole ratios:
[tex]C=\frac{0.0165}{0.0165}= 1\\\\H=\frac{0.0220}{0.0165}= 1.33\\\\O=\frac{0.0166}{0.0165}= 1[/tex]
Finally, we turn them into whole number by multiplying by 3 so that the empirical formula is:
[tex]C_3H_4O_3[/tex]
Regards!
Answer "and" Explanation:
Relative atomic masses: C = 12.0, H = 1.0, O = 16.0
Mass fraction of C in CO₂ = 12.0/(12.0 + 16.0×2) = 12.0/44.0
Mass fraction of H in H₂O = 1.0×2/(1.0×2 + 18.0) = 2.0/18.0
In 0.486 g of the compound:
Mass of C = Mass of C in CO₂ = (0.728 g) × (12.0/44.0) = 0.199 g
Mass of H = Mass of H in H₂O = (0.198 g) × (2.0/18.0) = 0.022 g
Mass of O = (0.486 - 0.199 - 0.022) g = 0.265 g
x : y : z
= (0.199/12.0) : (0.022/1.0) : (0.265/16.0)
= 0.0166 : 0.022 : 0.0166
= (0.0166/0.0166) : (0.022/0.0166) : (0.0166/0.0166) … Divided by the smallest number
= 1 : 1.33 : 1
≈ 1 : (4/3) : 1
= 3 : 4 : 3
Hence, empirical formula = C₃H₄O₃
is NaHCO3 a binary compound
Answer:
No
Explanation:
Binary compounds contain only 2 distinct elements.
For example magnesium oxide MgO is a binary compound.
NaHCO3 contains 4 distinct elements.
How many molecules of fructose would you have if you have 0.7 moles of
fructose?
*
Answer:
4.214 × 10^23 molecules.
Explanation:
Number of molecules in a substance can be calculated by multiplying the number of moles in that substance by Avagadro's number, which is 6.02 × 10^23.
That is, no. of molecule = n × Avagadro constant
In this case, there are 0.7 moles of fructose. Hence;
number of molecules = 0.7 × 6.02 × 10^23
no. of molecule = 4.214 × 10^23 molecules.
A neutral atom has a ground state electron configuration of 1s22s22p63s2.The neutral atom becomes an ion during a chemical reaction.Which is the most likely charge of the ion
Answer:
+2
Explanation:
the atom will acquire the noble gas configuration if it loses 2 electrons, becoming a divalent cation
1. What two things reflect some of the incoming solar radiation back out into space?
Answer:
About 29 percent of the solar energy that arrives at the top of the atmosphere is reflected back to space by clouds, atmospheric particles, or bright ground surfaces like sea ice and snow
Q.
.No.of valence electrons present in 4.2g of nitride ion (N^(3- are:
(a) 2.4times N
(b) 4.2times N
(c) 1.6times N
(d) 3.2times N
Answer:
if na is Avogadros number then number of vaclence electron in 4.2 g of nitride ions (N3-is.2.4Na. so the answer is 2.4 na
Explanation:
Mass N3- ion = 14 g/mol. So,
4.2 g X (1 mol/14 g) = 0.3 mol N3-
Number of N3- ions = 0.3 mol X 6.02 X 10^23 ions/mol = 1.8 X 10^23 ions
Each N3- ion has 8 valence electrons, so total number of valence electrons = 1.8 X 10^23 X 8 = 1.4 X 10^24 valence electrons.
hope it helps
What is the molality of an acetic acid solution that contains 0.500 mol of HC2H3O2 (molar mass: 60g/mol) in 0.800 kg of water?
Answer: The molality of given acetic acid solution is 0.625 m.
Explanation:
Given: Moles of solute = 0.5 mol
Mass of solvent = 0.8 kg
Molality is the number of moles of solute present in a kg of solvent.
Therefore, molality of the given solution is calculated as follows.
[tex]Molality = \frac{moles}{mass of solvent}[/tex]
Substitute the values into above formula as follows.
[tex]Molality = \frac{moles}{mass of solvent}\\= \frac{0.5 mol}{0.8 kg}\\= 0.625 m[/tex]
Thus, we can conclude that the molality of given acetic acid solution is 0.625 m.
Butene would have __ carbon atoms and a __ bond
Answer:
Butene would have 4 carbon atoms and a double bond.
Explanation:
The chemical formula for butene is C[tex]_4[/tex]H[tex]_8[/tex]
Here is an image of it.
Answer:
we have
But :4
bond :ene :2
So
Butene would have _4_ carbon atoms and a _2_ bond
What is anything has mass and volume called?
Answer:
Matter
Explanation:
It has mass and it takes up space
What color does blue brown and red make
Answer:
dark brown with a hint of purple
have a good day :)
Explanation:
2Al + 3CuSO4–>3Cu+ Al2(SO4)3
If 2.75 g Al reacted completely with excess CuSO4 and the percent yield of Cu is 80.5%, what mass of Cu was produced?
Answer:
7.82 g of Cu
Explanation:
2 moles of Al react to 3 moles of copper sulfate in order to produce 3 moles of copper and 1 mol of aluminum sulfate.
Firstly we determine the moles of reactant.
As copper sulfate is in excess, Al is the limiting.
2.75 g . 1mol /26.98g = 0.102 moles
Ratio is 2:3. 2 moles of Al, can produce 3 moles of Cu
So the 0.102 moles of Al will produce(0.102 . 3) /2 = 0.153 moles.
We convert moles to mass: 0.153 mol . 63.5g /mol = 9.71 g
That's the theoretical yield (100 % yield reaction)
We know that: (yield produced / theoretical yield) . 100 = percent yield
We replace:
(Yield produced / 9.71g) . 100 = 80.5 %
(Yield produced / 9.71g) = 0.805
Yield produced = 0.805 . 9.71g = 7.82 g
Which of the following relationships is true?
A. pH − pOH = 14
B. Ka × Kb = 1 × 10-14
C. pKa × pKb = 14
D. pKa × pKb = 1 × 10-14
Answer:
D. pKa × pKb = 1 × 10-14
Explanation:
hope this helps, if not, give me time to edit
Answer:
B. Ka × Kb = 1 × 10-14
Explanation:
yw
hurricanes typically form over A: Warm ocean water B: Tropical rainforest C: Very dry land masses D: COLD ocean water
Answer:
A.) Warm Ocean Waters
Explanation:
Hurricanes usually originate within hotter climates but must have a direct or large body of water to form over. In this case, majority of the hurricanes reported originated over large bodies of water such as Oceans near the equator. This is so because with intense humidity and high pressured areas hurricanes began to collect vapor which begins to swirl in a spiral format. Many hurricanes in fact occur rather near the equator.
Fun Fact: Hurricanes usually occur among coastal lines located closer to the equator. Such as, within the US, hurricanes up north are considered to be quite rare given the usual cold environment in comparison to the southern states.
two ways the rate of a reaction be monitored
Answer: If a reaction produces a gas such as oxygen or carbon dioxide, there are two ways to measure the reaction rate: using a gas syringe to measure the gas produced, or calculating the reduction in the mass of the reaction solution.
Explanation:
https://courses.lumenlearning.com/introchem/chapter/measuring-reaction-rates/#:~:text=If%20a%20reaction%20produces%20a,mass%20of%20the%20reaction%20solution.
This is the site I got it from. I hope this helps.
What type of chemical reaction does this equation represent?
Ag2S + KCN --> AgCN + K2S
Mg + 2HCl → MgCl2 + H2
How many grams of Mg is needed to produce 100 g of H2?
H2
n=m÷Mr
n=100×2
n=200 moles
Mole ratio
Mg : H2
1 : 1
x : 200
cross multiply= x=200
Mg
make m the subject
m=n×Mr
m=200×24.305
m=4861 g
how many moles are 2.54 x 10^29 molecues of H2O
Answer:
[tex]\boxed {\boxed {\sf 421,786.7818 \ mol \ H_2O}}[/tex]
Explanation:
We are asked to convert from molecules of water to moles.
1. Avogadro's Number1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc). This is Avogadro's Number: 6.022*10²³. In this problem, the particles are molecules of water.
2. Convert Molecules to MolesUse Avogadro's Number to make a ratio.
[tex]\frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Multiply by the number of molecules given: 2.54 *10²⁹
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Flip the ratio so the units of molecules of water cancel.
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} \ molecules \ H_2O}[/tex]
[tex]2.54 *10^{29} \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} }[/tex]
Condense the problem into 1 fraction.
[tex]\frac {2.54 *10^{29} }{6.022 *10^{23} }\ mol \ H_2O[/tex]
[tex]421786.7818 \ mol \ H_2O[/tex]
2.54 *10²⁹ molecules of water are 421, 786.7818 moles of water.
pls help me with this one (ignore what i pick)
Answer:
Its the second one i think
Explanation:
Coz liquid can move faster then a solid obviously :)
The earth’s _____ creates a cross-current motion that captures the north and south moving air creating a ___ _____?
ANSWER AND YOU WILL BE MARKED BRAINLIEST (NO FILES) :))
Answer:
deflection,Coriolis effect
hope this helps
which statement best describes the difference between weather and climate
a) climate is about the hydrospace, weather is about autosphere
b) climate describes average temperature, weather describes many more factores
c) Climate is long periods of time, weather is short periods of time ( present day)
d) Climate describes conditions at sea level, weather describes conditions at different elevations
WILL MARK BRIANLIEST
Answer:
C
Explanation:
Brainliest
I tried my best
PLEASE HELP ME (JOULES)
Type the correct answer in the box. Round your answer to the nearest whole number.
Dina has a mass of 50 kilograms and is waiting at the top of a ski slope that’s 5 meters high.
The maximum kinetic energy she can reach when she skis to the bottom of the slope is
joules.
Use PE = m × g × h and g = 9.8 m/s2. Ignore air resistance and friction.
Answer:
2450 joules
Explanation:
The formula for potential energy is PE = m x g x h
m is the mass, in kg (50)
g is the acceleration due to gravity, in meters per second squared (9.8)
h is the height, in meters (5)
The problem gives m = 50, g = 9.8, and h = 5. Plug that into the formula and get the answer.
[tex]PE = mgh\\PE = (50) (9.8) (5)\\PE = 2450[/tex]
According to law of conservation of energy and substitution of values in formula gives,2540 joules as maximum kinetic energy.
What is law of conservation of energy?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.Substitution in formula gives , PE=50×9.8×5=2540 J.
Thus, the maximum kinetic energy she can reach when she skis to the bottom of the slope is 2540 J.
Learn more about law of conservation of energy,here:
https://brainly.com/question/29775341
#SPJ7
what are 2 factors that impact the flow of energy into and out of earths systems
Answer:
Solar energy causes evaporation; uneven heating of the Earth causes air masses to move; Coriolis forces help storms to take shape; and gravity makes rivers flow downhill. Another relevant factor is the high heat capacity (or specific heat) of water.
Explanation:
hoped this helped;)
solute separates as a solid when a saturated solution is cooled why
Answer:
When a saturated solution at a high temperature is cooled, why is the solution separated as a solid? When a saturated solution at a high temperature is cooled, inter molecular space between the molecules of the solution decreases. As a result, no more solute can remain in a solution separating out as a solid crystal.
Si tuvieras que definir los atomos segun los postulados de Dalton, dirias que los atomos son particulas:
Answer:
Según el científico inglés John Dalton, los átomos son esferas elásticas e indivisibles. Así, según él, el átomo es el bloque de construcción más pequeño de la materia. Es homogéneo e indivisible, y todos los átomos de un elemento químico dado son idénticos (es decir, tienen el mismo conjunto de propiedades).
Aunque se descubrió a finales del siglo XIX que los átomos están hechos de partículas aún más pequeñas y pueden sufrir transformaciones, y que los átomos de un elemento dado pueden diferir ligeramente entre sí (isótopos), la teoría de Dalton fue la base para el desarrollo de la tecnología química moderna.
What is the electron configuration of the sodium atom after it loses an electron?
Multiple choice question.
A)
1s22s22p6
B)
[He]2s22p5
C)
1s22s22p63s1
D)
1s22s22p63s1
Answer:
the answer is A 1s22s22p6
The empirical formula of a compound is HC2CI and the g-molar mass is 182 What is the molecular formula ?
Answer:
tyr4v
Explanation:
hc2ci g molar mass 182 = hc2ci =200
how does Arizona's climate relate to the air and ocean currents?
Answer: In Arizona, climate change is already making deadly heat waves, droughts and wildfires across the state worse. These impacts have real costs on Arizonans' health and economy, including heat-related deaths, higher electricity bills, crop losses and more.
Explanation:
https://www.edf.org/climate/costofinaction- this is where I gathered this info. Not mine. But I hope it helps!
Explain using complete sentences as well as sketch a graph of the relationship between the following variables of a gas when all other variables are held constant:
pressure and volume
pressure and temperature
volume and temperature
Answer:
Pressure and volume relationship, Boyle's law
The relationship between pressure and volume of a gas is given by Boyle's law which states that at constant temperature, the pressure of a given mass of gas is inversely proportional to its volume
Mathematically, we have;
P ∝ 1/V
Please find attached the graph of the relationship between pressure and volume, created with MS Excel
Pressure and temperature relationship, Gay lussac's Law
The pressure of a given mass of gas is directly proportional with the absolute temperature of the gas, provided the volume remains constant
Mathematically, we have;
P ∝ T
Please find attached the graph of the relationship between pressure and temperature, created with MS Excel
Volume and Temperature relationship, Charles Law
The relationship between the volume of a given mass of gas and its pressure is given by Charles law, which states that the volume of a given mass of gas is directly proportional to its absolute temperature, given that the pressure of the gas is kept constant
Mathematically, we have;
V ∝ T
Please find attached the graph of the relationship between volume and temperature, created with MS Excel
Explanation:
which kind of climate do the most stable ecosystems tend to have?
A. Wet winters, dry summers
B. Cold winters, warm summers
C. cold and dry year-round
D. Warm and moist year round
which type of bonding involves sharing valence electrons, but the valence electrons aren't confined to a specific region between atoms and instead exist throughout the crystal structure of the material?
Answer:
metallic bonding
Explanation:
Metallic bonding is bonding where electrons exist as "sea of electrons" meaning they can go anywhere in the structure and are not localized in specific place like covalent bonds are sometimes.
What is the amount of space that a material takes up ?
volume.
The amount of space a material occupies is its volume.
Mass is measured using a scale. Volume is the amount of space matter takes up. Volume can be measured by multiplying the length, width, and height of an object, or by using a measuring cup and seeing how the measurement of water changes in a cup. Density is the amount of matter an object has in a certain space.
Answer:
Volume
Explanation:
Mass is measured using a scale. Volume is the amount of space matter takes up. Volume can be measured by multiplying the length, width, and height of an object, or by using a measuring cup and seeing how the measurement of water changes in a cup. Density is the amount of matter an object has in a certain space.