Explanation:
Melting is defined as the physical process where a solid state of a substance converts into its liquid state. No change of chemical composition takes place, just the physical state of water is changing.
[tex]\text{Solid}\rightleftharpoons \text{Liquid}[/tex]
There are given carboxylic acids. The melting point of these acids increases to its second group member which is ethanoic acid due to prevalent hydrogen bonding. To break this bonding, a high amount of heat needs to be applied.
But as we move forward, the melting point decreases sharply as an increase in the number of carbon atoms decreases the hydrogen bonding.
Melting point of Formic Acid = [tex]8.3^oC[/tex]
Melting point of Acetic Acid = [tex]16.6^oC[/tex]
Melting point of Propionic Acid = [tex]-21^oC[/tex]
how many moles are in 150 grams of water
Answer:
Solution given:
H20=1+1+16=18grams
we have
1 mole of water =18grams
now
150grams of water=1/18*150=25/3 =8.33mole.
150 grams of water =8.33mole.
Note:
mole =given mass/actual mass of molecule/atom
1 mole of water is 18 grams.
Then,
150 grams of water,
→ 1/18 × 150
→ 25/3
→ 8.33333 . . .
Hence, 150 grams of water is 8.3 moles.
Valence electrons are important when drawing molecular structures because
a. They are closest to the nucleus of the atom and do not participate in chemical
bonding
b. They are closest to the nucleus of the atom and participate in chemical
bonding
c. They are farthest away from the nucleus of the atom and do not participate in
chemical bonding
d. They are farthest away from the nucleus of the atom and participate in
chemical bonding
Answer:
d
Explanation:
Valence electrons are in the outermost shell. They form chemical bonds with other elements, not any other electrons. Hope this helps!
What type of molecule is shown below?
A. Ether
B. Alcohol
C. Aldehyde
D. Ketone
The given molecule is an aldehyde with the formula HCHO. It is the simplest and primary aldehyde . Hence, option c is correct.
What are aldehydes ?Aldehydes are a class of organic compounds that contain a carbonyl group (a carbon double-bonded to an oxygen) at the end of a carbon chain. The general formula for an aldehyde is RCHO, where R is a substituent or side chain attached to the carbonyl group.
Aldehydes are often characterized by their distinctive odor, which can be described as pungent and irritating. Some common aldehydes include formaldehyde (used in building materials and as a disinfectant), acetaldehyde (found in alcoholic beverages), and benzaldehyde (used in food flavorings).
Aldehydes are important intermediates in many chemical reactions, and they are used in a variety of industrial and laboratory applications. They can be synthesized by the oxidation of primary alcohols or by the partial oxidation of hydrocarbons. The given compound is formaldehyde HCHO.
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Why would the electrolysis reaction stop if the battery was removed
If the battery was removed, the energy produced by the battery would not be able to continue its path along the circuit.
How much mass does 1 mol of O2 gas have?
O A. 16.00 x 2g
O B. 16.00 x (6.02 x 10^23) g
C. 2 x (6.02 x 10^23) g
D. 16.00 g
Answer:
Option A.
Explanation:
1 mol of anything contains 6.02×10²³ particles.
We know that 1 mol of oxygen gas contains 2 moles of O.
1 mol of oxygen weighs 16 g/mol, the mass for 1 molecule of O.
By the way, the mass for 1 mol of O₂ may be:
Option A → 16 g/mol . 2 mol
32 g
Oyxgen is a dyatomic molecule, that's why we have 2 moles of O.
Another example can be:
1 mol of water (H₂O) contains 2 moles of H and 1 mol of O.
what is a metal ore?
Answer:
metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them
6. Which of the following represent kinetic energy? *
(1 Point)
the water behind a dam
O a boulder hug from a net over a pit
a calculator falling to the floor
the string on a bow before being released
Answer:
weter
Explanation:
How many atoms are there in total in a molecule of sulfur trioxide SO3??
Answer:
I got 1.14 mol So3 as the answer
hopefully if this could help
What is the volume of .750 M hydrochloride acid required to react completely with 25.00 mL of .290 M NaOH solution?
from
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
from
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Va=9.67ml
The volume of .750 M hydrochloride acid is required to react completely with 25.00 mL of .290 M NaOH solution is 9.67ml
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
Therefore,
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Hence,
Va=9.67ml
What is Hydrochloric acid?
Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctively pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans. Hydrochloric acid is an important laboratory reagent and industrial chemical.
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A certain element has two naturally occurring isotopes. The atomic mass of isotope 1 (35.4723 % natural abundance) is 184.9529 amu. Determine the atomic mass of isotope 2. The average atomic mass of the element is 186.2071 amu. Do not include units; report answer to 4 decimal places.
Answer:
the value
Explanation:
any of ya'll good at chemistry?????
Answer:
i good at chemistry
Explanation:
not all but i try
This graph represents a population of molecules in a gas versus the distribution of the average velocity(speed) of its molecules in that population. Assume all molecules to be of the same mass. In reading the graph, it is important to note three things. One, is the most probable speed is at the peak of the curve. Secondly, the most probable speed increases as the temperature increases (so shift to the right), and the distribution broadens as it increases.
On the graph, indicate the average kinetic energy of the population.
Explain your answer.
What part of the graph indicates the temperature of the sample?
Explain your answer.
Sketch a curve that represents the distribution of molecules at a temperature below the one shown. Label it as T2. Describe both T and T2 in terms of their average kinetic energy. Be specific and detailed.
Submit your answer below.
Answer:
Part A
Given that the graph is symmetrical and bell shaped, the average kinetic energy is given by the midline of graph, which corresponds to the common speed of the highest number of the population
Part B
The formula for the average kinetic energy, K.E. = (3/2)·(R/NA)·T
Therefore, the part of the graph that indicates the temperature of the sample is the average kinetic energy. K.E.
Part C
At a lower temperature, the heat is less evenly distributed and we have the distribution T2 higher than T1
Please see the attached graph created with MS Visio
Explanation:
What is a natural disaster?
Answer:
Explanation:
A natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, storms, and other geologic processes
Answer:
A natural disaster is a natural, major harmful event resulting from natural processes of the Earth such as floods, earthquakes, or hurricanes, tornadoes, volcanic eruptions, tsunamis, storms, and other geologic processes that causes great damage or loss of life.
A doctor is testing a new medication and he doesn’t tell the people in the study about the possible side effects of the medicine. He is _____.
Using the following balanced equation, if you had 48 molecules of O2,
how many molecules of SO3 would you produce?
S8 + 12O2 --> 8SO3
Explanation:
hope this helps u understand:)
_______ reach the surface first during an earthquake.
Rayleigh waves
P waves
Love waves
S waves
PLEASE ANSWER! WILL GIVE A LOT OF POINTS! NEEDS EXPLANATION! NO LINKS OR I'LL REPORT!! PLEASE
distilling ethanol from a wine to determine the percentage of alcohol in a wine uses what type of property
physical property
bonding property
homeowner's property
Answer:
Bonding property
Explanation:
Distillation deals with boiling solutions. Therefore the boiling point has a major part to play. Boiling point of a substance deals with the type of bonds present. For example water has hydrogen bonding which is a weak intermolecular force therefore the boiling point of water isn't that high. If we were to focus on an ionic compounds the boiling point would be higher because ionic compounds have ionic bonding which are stronger bonds which therefore requires more energy to break those bonds therefore a higher boiling point.
In this case for the ethanol to distill the property it's focusses on is the bonds. The strength of the bonds really.
which of these elements has two valence electrons?
a. hydrogen (H)
b. barium (Ba)
c. nitrogen (N)
d. krypton (Kr)
e. bromine (Br)
Se realiza una mezcla de minerales de Cu y Fe: 20 kg FeS2 (pirita), 70 kg de Fe2O3 (hemetita) 15 kg de CuFe2 (calcopirita) y 90 kg de CuO (tenorita). Calcule: Porcentaje de hierro Porcentaje de cu Porcentaje de azufre y oxigeno
Answer:
34.78% Fe
39.66% Cu
5.48% S
20.07% O
Explanation:
Para resolver esta pregunta debemos hallar la masa de cada átomo en cada mineral. Así, podremos hallar el porcentaje de cada átomo:
Pirita (Fe: 55.845g/mol; S: 32.065g/mol; FeS2: 119.975g/mol)
Masa Fe:
20kg FeS2 * (1*55.845g/mol / 119.975g/mol) = 9.31kg Fe
Masa S:
20kg FeS2 * (2*32.065g/mol / 119.975g/mol) = 10.69kg S
Hemetita (Fe: 55.845g/mol; O: 16g/mol; Fe2O3: 159.688g/mol)
Masa Fe:
70kg Fe2O3 * (2*55.845g/mol / 159.688g/mol) = 48.96kg Fe
Masa O:
70kg Fe2O3 * (3*16g/mol / 159.688g/mol) = 21.04kg O
Calcopirita (Fe: 55.845g/mol; Cu: 63.546g/mol; CuFe2: 175.236 g/mol)
Masa Fe:
15kg CuFe2 * (2*55.845g/mol / 175.236 g/mol) = 9.56kg Fe
Masa Cu:
15kg CuFe2 * (1*63.546g/mol / 175.236 g/mol) = 5.44kg Cu
Tenorita (O: 16g/mol; Cu: 63.546g/mol; CuO: 79.545 g/mol)
Masa O:
90kg CuO * (1*16g/mol / 79.545 g/mol) = 18.10kg O
Masa Cu:
90kg CuO * (1*63.546g/mol / 79.545 g/mol) = 71.90kg Cu
Masa Total: 20kg + 70kg + 15kg + 90kg = 195kg
Porcentaje Hierro:
9.31kg Fe + 48.96kg Fe + 9.56kg Fe / 195kg * 100 =
34.78% Fe
Porcentaje Cobre:
5.44kg Cu + 71.90kg Cu / 195kg * 100 =
39.66% Cu
Porcentaje Azufre:
10.69kg S / 195kg * 100 =
5.48% S
Porcentaje Oxígeno:
21.04kg O + 18.10kg O/ 195kg * 100 =
20.07% O
explain how ships made of steel float on water
Answer:
The air that is inside a ship is much less dense than water. That's what keeps it floating
Struggling on this problem.
Answer:
4Al + 3O2 ----> 2Al2O3
Explanation:
first blank 4
second blank 3
third blank 2
Write the electron configuration for Gold (Au). You may choose to write it in the long form or in the noble gas configuration form (shortcut).
Answer:
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s¹4f¹⁴5d¹⁰
Explanation:
Which statement explains why catalysts are important for living
organisms? *
Catalysts increase the amount of product formed from limited reactants.
Catalysts cause gases to be produced at a slower rate, so cells don't burst.
Catalysts are used up during chemical reactions, so organisms must constantly make
new ones.
Catalysts allow chemical reactions to occur at temperatures at which the organism
lives.
Answer:
Catalysts allow chemical reactions to occur at temperatures at which the organism lives.
Explanation:
Catalysts are molecules that speeden the rate of chemical reaction by lowering the activation energy of the reaction. In a living system, the catalyst are ENZYMES, which help to hasten up many biochemical reactions.
Another function of catalyst in living systems is that it allows chemical reactions to occur at temperatures at which the organism lives.
23. What type of chemical reaction is: CH, + 0→ CO2 + H20
a. Combustion
b. Neutralization
C. Synthesis
d. Double Replacement
Answer:
combustion
Explanation:
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what are some different natural events and man-made activities that can affect ocean acidification?
Ocean acidification is the process of decreased pH levels of the oceans. The burning of fossil fuels and industrialization are man-made activities that lead to this process.
What is Ocean acidification?Ocean acidification is an increased concentration of acidic components of the oceans due to an increase in the carbon dioxide level of the oceans.
Human activities like cutting down a large number of trees, discharging from industrial outlets, and burning fossils like petrol, coal, diesel, etc. are leading to increased acidification of the oceans.
Therefore, natural causes like increased salinity, flood, and earthquake are the reasons for oceanic acidification.
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What is the uses of seawater as a source of renewable energy?
Explanation:
Desalination of seawater is considered a renewable source of water, although reducing its dependence on fossil fuel energy is needed for it to be fully renewable.
The part of an atom that has an overall positive charge is called
A)
an electron
B)
the nucleus
C)
the first shell
D)
the valence shell
Answer: I think it’s B
What is the gram molecular mass of a compound if 5 moles of the compouns has a mass of 100 grams?
Answer:
20 grams.
Explanation:
5 mols of a compound has a mass of 100 grams
1 mol of the same compound has a mass of 100/5 = 20 grams
the correct sequence where reactivity towards oxygen increases.
Answer:
Option D is good to go!
Explanation: as per the reactivity series more reactive substances will react with the counterpart substance.The most reactive substance here is calcium while the least reactive is aluminium, the magnesium comes in between.As per their reactivity, these substances will react with oxygen.
Explanation:
Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points
Answer:
chlorine is larger so the symbol is <
Explanation:
