Answer:
Find ratio of atoms for empirical formula, divide mass by atomic mass
C=42.87/12 = 3.57
H= 3.598/1 = 3.598
O= 28.55/16 = 1.784
N= 25.00/14 =1.1785
to see ratio, divide by smallest no
Gives C2H2ON for empirical formula
Empirical mass = 24 +2 +16 + 14 = 56
165 to 170 /56 = 3
so molecular formula = empirical formula x 3= C6H6O3N3
1. The empirical formula of the compound is C₂H₂ON
2. The molecular formula of the compound is C₆H₆O₃N₃
1. Determination of the empirical formula.From the question given above, the following data were obtained:
Carbon (C) = 42.87%
Hydrogen (H) = 3.598%
Oxygen (O) = 28.55%
Nitrogen (N) = 25.00%
Empirical formula =?C = 42.87%
H = 3.598%
O = 28.55%
N = 25.00%
Divide by their molar mass
C = 42.87 / 12 = 3.5725
H = 3.598 / 1 = 3.598
O = 28.55 / 16 = 1.7844
N = 25.00 / 14 = 1.7857
Divide by the smallest
C = 3.5725 / 1.7844 = 2
H = 3.598 / 1.7844 = 2
O = 1.7844 / 1.7844 = 1
N = 1.7857 / 1.7844 = 1
Therefore, the empirical formula of the compound is C₂H₂ON
2. Determination of the molecular formula.Molar mass of compound = (165 + 170)/2
Molar mass of compound = 335/2
Molar mass of compound = 167.5 g/mol
Empirical formula = C₂H₂ON
Molecular formula =?Molecular formula = Empirical formula × n = molar mass of compound
[C₂H₂ON]n = 167.5
[(12×2) + (2×1) + 16 + 14]n = 167.5
[24 + 2 + 16 + 14]n = 167.5
56n = 167.5
Divide both side by 56
n = 167.5 / 56
n = 3
Molecular formula = [C₂H₂ON]n
Molecular formula = [C₂H₂ON]₃
Molecular formula = C₆H₆O₃N₃Therefore, the Molecular formula of the compound is C₆H₆O₃N₃
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It requires energy to melt ice. Applying salt to the ice created a chemical reaction melting the ice. Were did the energy come from to melt the ice? *
Answer:
HOPE IT HELPS...
Explanation:
When added to ice, salt first dissolves in the film of liquid water that is always present on the surface, thereby lowering its freezing point below the ices temperature. Ice in contact with salty water therefore melts, creating more liquid water, which dissolves more salt, thereby causing more ice to melt, and so on
Determine the number of moles in a sample of calcium that contains 6.34 x 1022
atoms.
Answer:
0.105 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{6.34 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.105315...[/tex]
We have the final answer as
0.105 molesHope this helps you
Potassium + Bromine
Lewis dot diagram
Answer:
Explanation:
.. | .. | -
K. + : Br . ----> K⁺ | : Br : |
.. | .. |
Which sample contains the same number of atoms as a gram-atomic mass of He?
1.
6 g of C
2.
7 g of Li
3.
8 g of o
4.
9 g of F
Submit Answer
Answer: 2. 7g of Li
Explanation: A mole of any substance contains the same number of particles (Avogadro's number, 6.02*10^23). 1 gram atomic mass of He (4g) is equivalent to 1 mole; so is 1 gram atomic mass (7g) of Li
Which example shows how genetic engineering can be used in the agricultural industry?
A.
Two tomato plants that produce sweet tomatoes are crossed to produce offspring that also produce sweet tomatoes.
B.
A horse is bred with a donkey to produce a hybrid offspring that has characteristics of both parents.
C.
A gene for pest resistance is inserted into the genome of a corn plant.
D.
A sheep is cloned to produce an exact copy of the original sheep.
Answer:
c. a gene for pest resistance is inserted into the genome of a corn plant
Explanation:
Answer: A duh
Explanation:
becastse
When glucose is totally oxidized to CO2 and H2O, how many ATP molecules are made by oxidative phosphorylation out of a maximum yield of how many ATP molecules?
Answer: 26 out of 30.
Explanation:
Out of 30 ATP molecules, 26 are produced from maximum oxidative phosphorylation production. Two more come from glycolysis and two more are from the citric acid cycle.
To power other cellular processes, ATP captures and releases chemical energy obtained from the breakdown of food molecules.
The murder weapon weighs 150 grams. The initial temperature of the weapon before being tested was 100 oC. After placing the weapon in the water, the temperature dropped to 25.13 oC. Find the specific heat capacity of the unknown metal by first calculating the heat energy gained by the water.
Water
Mass = 2500 g
Initial temperature = 25 o C Final temperature = 25.13 oC
Equations
q = m C p Δ T C p = q / (mΔT)
1. How much heat energy (q) did the water gain?
2. What is the specific heat capacity (C p) of the unknown metal?
3. Compare the heat capacity you calculated with the one below, which one matches?
Specific heat capacity of metal (J / g or C)
Silver 0.235
Gold 0.129 Lead 0.121
Copper
4. What metal was the murder weapon made of?
0.385
1. heat gained : 1358.5 J
2. Cp metal = 0.121 J/g C
3/4 The metal = Lead
Further explanationThe law of conservation of energy can be applied to heat changes, i.e. the heat received/absorbed is the same as the heat released
Q in = Q out
Heat can be calculated using the formula:
Q = mc∆T
Q water(gained) = Q metal (lost)
1. Heat of water gained
[tex]\tt Q=2500\times 4.18\times (25.13-25)=1358.5~J[/tex]
2. The specific heat capacity (C p) of the unknown metal :
[tex]\tt Cp=\dfrac{1358.5}{150\times (100-25.13)}=0.121~J/g^oC[/tex]
bigger size elements have low ionization energy and high shielding effect .justify the statement
Bigger size elements have low ionization energy and high shielding effect because:
Shielding effect:This effect describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. The more electron shells there are, the greater the shielding effect experienced by the outermost electrons.When shielding effect decreases the attraction force exerted by the nucleus increases on valence electrons.As a result, atoms will be larger.Find more information about Shielding effect here:
brainly.com/question/26366780
does SiF4 have polar covalent bonds?
Answer:
SiF4 is not a polar covalent bond.
Explanation:
SiF4 is a nonpolar molecule because the fluorine's are arranged around the central silicon atom in a tetrahedral molecule with all of the regions of negative charge cancelling each other out.
the filament in an electric light bulb is made from a. platinum b. fiberglass c. aluminum d. tungsten
I NEED ANSWER ASAP Which of the following statements is true for a scientific theory? It is a well-tested hypothesis. It is verified by only one scientist. It is based on only one experiment. It is investigated over a short period.
Answer:
A.) It is a well-tested hypothesis.
Answer:
Its is a well-tested hypothesis
Explanation:
i took the test
How does knowing the meaning of prefix-trans help you remember what happens to light that strikes a translucent object ?
Explanation:
The prefix trans- and its variant tra- mean "across".
A translucent substance allows some light to go "across" it to the other side. Also, think about a transparent substance: it allows light to go "across" it; or a translation, it is a going "across" from one language into another.
A ball is moving at a speed of 6.70 m/s. If the kinetic energy of the ball is 3.10 J, what is the mass of the ball?
Answer:
0.14 kgExplanation:
The mass of the ball can be found by using the formula
[tex]m = \frac{2k}{ {v}^{2} } \\ [/tex]
v is the velocity
k is the kinetic energy
From the question we have
[tex]m = \frac{2(3.10)}{ {6.70}^{2} } = \frac{6.20}{44.89} \\ = 0.138115...[/tex]
We have the final answer as
0.14 kgHope this helps you
how do humans benefit from photosynthesis
Answer:
Explanation:
Without photosynthesis there would be no oxygen in the earth's atmosphere and we wouldn't be here!
What is the similarity between teeth and eggshells?
Explanation:
Because they share a similar composition, similar chemicals affect their structures in positive or negative ways. For example, fluoride – a staple in many dental practices – strengthens both enamel and eggshells and helps protect them from acids. Acids weaken and break down both substances. Scientists find this particularly concerning given that the ocean is growing increasingly acidic. They fear this may weaken the eggs of some marine species and harm their chance of survival. Most dentists recommend limiting aggressively acidic foods and beverages such as soft drinks.
What of these should Hailey include in her list?
Synthetic polymers are biodegradable.
Synthetic polymers are not flexible.
Synthetic polymers are recycled cheaply.
Synthetic polymers are inexpensive to produce.
Answer:
Hailey should add, they are inexpensive to produce.
Explanation:
Reason being why they are inexpensive to produce, is due to them being chemical based and easy to product in the factory setting. Which makes them extremely cheap to make.
Reason being why the others are wrong, synthetic polymers are not biodegradable as they are made in a factory with oils. Synthetic polymers are not flexible due to them being used for harder products. Synthetic polymers are not recycled cheaply as they are made with chemicals which makes it very hard to recycle.
answer:D
Explanation: i took it
Ratan started business with cash Rs 50000
Answer:
what's the question here then ?????
Explanation:
nepal ????
What did you include in your response? Check all that
apply.
O No, thermal energy is not being transferred by
radiation in this image.
O The eggs are in direct contact with the metal pan,
which is in direct contact with the gas flame.
O Thermal energy is being transferred by conduction.
O Radiation transfers thermal energy by
electromagnetic waves.
O Radiation does not transfer thermal energy by
direct contact.
Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers
Answer:
Energy can enter or exit an open system
Explanation:
D
Once a ball is hit and no longer touches the mallet, it continues moving.
What causes the ball to continue moving?
how is wind energy captured?
where is wind energy found?
how is water energy captured?
where is water energy found?
plz use the passage i put. plz and thank you!!!!!
According to Le Chatelier's principle, what happens to the equilibrium constant (K) when the concentration of the reactants is doubled? The value of the equilibrium constant (K) is doubled. The value of the equilibrium constant (K) is halved. The value of the equilibrium constant (K) remains the same. The value of the equilibrium constant (K) changes unpredictably.
Answer:
The value of the equilibrium constant (K) remains the same.
Explanation:
A state of dynamic equilibrium is said to have been achieved in a reaction system when the rate of forward reaction equals the rate of reverse reaction.
At equilibrium, doubling the initial concentration of reactants have no effect on the equilibrium constant K. The equilibrium will rather shift to the left or right as required in order to annul the constraint.
Answer:
C
Explanation:
which of the following is a renewable resource a. copper b. aluminum c. peanut oil d. natural gas
Answer: c. peanut oil
Explanation:
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY
Answer:
true
Explanation:
just did it
Please if you don't know don't answer
Answer:
Mass = 50kg, a = 20m/sec^2
F = MA
F = 50 * 20
F = 1000N
F = MA
650 = M * 10
M = 650/10 = 65kg
The phenomenon of weightlessness occurs when there is no force of support on your body. when your body is effectively in free fall, accelerating downward at the acceleration of gravity, then you are not being supported.
F = Gm1m2/distance^2
F = 6.6726* 10 ^-11 * 70 * 5.98 * 10^24/(6.38 * 10^6)^2
hope it helps you
Which learning theory is based on associative learning?
Answer:
1. Classical conditioning. Classical conditioning is a type of associative learning based on the association between a neutral stimulus with another that is significant for a person or an animal in order to generate a similar response.
Have a great day/night, and stay safe!
The table shows data for two groups of plants one grown with fertilizer and the other without fetalizer was the mean height of the plant given fertilizer
Answer:
What is the question?
Explanation:
What math is used to find density?
Answer:
[tex]\huge\mathtt{{\colorbox{silver}{ANSWER~~~↴}}}[/tex]
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
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New colors produced when any two of the primary colors of pigment are mixed; red, green, and blue
Answer:
A simulated example of additive color mixing. Additive primaries act as sources of light. The primaries red, green, and blue combine pairwise to produce the additive secondaries cyan, magenta, and yellow. Combining all three primaries (center) produces white.
when all of the primary colors are mixed it makes black
Explanation:
I WILL DIE I HAVE A KNIFE IN MY HAND. ANSWER WITH EXPLANATION. If the sound is high pitched, then the wave's frequency would have a:
A.high frequency, short wavelength
B. high frequency, long wavelength
C. low frequency, long wavelength
D. low frequency, short wavelength
Answer:
A
Explanation:
High frequency, short wavelength