Answer:
C.The rate of the reaction increases.
Explanation:
What would be the freezing point of a solution that has a molality of 1.324 m which was prepared by dissolving biphenyl (C12H10) into naphthalene
The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.
A solution is prepared by dissolving biphenyl into naphthalene. We can calculate the freezing point depression (ΔT) for naphthalene using the following expression.
[tex]\Delta T = i \times Kf \times m = 1 \times 6.90 \°C/m \times 1.324m = 9.14 \°C[/tex]
where,
i: van 't Hoff factor (1 for non-electrolytes)Kf: cryoscopic constantm: molalityThe normal freezing point of naphthalene is 80.26 °C. The freezing point of the solution is:
[tex]T = 80.26 \° C - 9.14 \° C = 71.12 \° C[/tex]
The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.
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A compound with an empirical formula of CH2O has a molar mass of 150. g. The molecular formula of this compound is
Answer:
C5H10O5
Explanation:
What happens to electronegativity as you go down the same group
on the Periodic Table?
Answer:
decreases
Explanation:
As you go down the same group on the periodic table, the electronegativity of an atom will decrease.
How can fungi be used to be treat diseases?
The medicinal effects attributed to fungi, based mainly on uncharacterized substances or extracts, include antiviral, immunomodulatory, antitumor, antioxidant, radical scavenging, anti-inflammatory, antihyperlipidemic or antihypercholesterolemic, hepatoprotective, and antidiabetic effects.
what is the molarity of an acetic acid solution if 25.0mL of the Hc2H3O2 solution is titrated with 29.7 mL of a 0.205 M KOH solution
The molarity of the acetic acid, HC₂H₃O₂ solution is 0.244 M
We'll begin by writing the balanced equation for the reaction
HC₂H₃O₂ + KOH —> KC₂H₃O₂ + H₂O
From the balanced equation above,
The mole ratio of the acid, HC₂H₃O₂ (nA) = 1
The mole ratio of the base, KOH (nB) = 1
From the question given above, the following data were obtained:
Volume of the acid, HC₂H₃O₂ (Va) = 25 mL
Volume of the base, KOH (Vb) = 29.7 mL
Molarity of the base, KOH (Mb) = 0.205 M
Molarity of the acid, HC₂H₃O₂ (Ma) =?MaVa / MbVb = nA/nB
(Ma × 25) / (0.205 × 29.7) = 1
(Ma × 25) / 6.0885 = 1
Cross multiply
Ma × 25 = 6.0885
Divide both side by 25
Ma = 6.0885 / 25
Ma = 0.244 MTherefore, the molarity of the acetic acid, HC₂H₃O₂ solution is 0.244 M
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What is wrong with writing the electron configuration of a ground state atom as 1s2 2s2 2p6 3s2 3p6 3d10 4s2 ?
Answer:
Writing of the subshells
Explanation:
Given configuration:-
[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^63d^{10}4s^2[/tex]
Actual configuration:-
[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^{10}[/tex]
This is because 4s orbital is less in energy than that of 3d
the greater gravitational force
Answer:
The stronger the pull of gravity on an object ( the greater it's weight)
when you take 10 grams of salt, and dissolve it in 25 grams of hot water what is the solubility
Answer:
When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. ... Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Explanation:
(NH4)4X what is the charge on X
Please answer these 2 questions
Answer:
Question 8, I think is C describe CR. Question 7 is Chemical reactions produce new substances
Explanation:
what are the 4 quantum numbers for the last electron in promethium 
Answer:
Promethium atoms have 61 electrons and the electronic shell structure is [2, 8, 18, 23, 8, 2] with Atomic Term Symbol (Quantum Numbers) 6H5/2.
the chemical bond between elements of the two terminals of the periodic table is
Answer:
Covalent bonds are much more common in organic chemistry than ionic bonds. A covalent bond consists of the simultaneous attraction of two nuclei for one or more pairs of electrons. The electrons located between the two nuclei are bonding electrons.
...
PLS HELP WILL GIVE BRAINLIEST!
Based on the diagram below, in what period is the atom located on the periodic table? *
a. period 4
b. period 2
c. period 6
d. period 1
Answer:
C. Period 6
Explanation:
Identify the correct description for each part labeled on the diagram
A
B
C
D
E
F
Answer:
No Specific question
Explanation:
Answer:
A: heating solid
B: melting
C: heating liquid
D: boiling
E: heating gas
F: melting point
Explanation: got it right
Which element has 2 energy shells and 2 valence electrons
Helium
Helium has 2 electrons both in the first shell (so two valence electrons).
Hope this helps :)
Can someone help me please
Answer:
13) Carbon Dioxide and water
Explanation:
The fact is that during photosynthesis, Carbon Dioxide is needed by green plants to manufacture their food and water is also needed but also chloroplast which contained chlorophyll is also needed
hence, the options are somehow confusing
14) perhaps it should be all of the above
Hydrogen gives off of energy when burned in oxygen, and methane gives off under the same circumstances. Of a mixture of g hydrogen and g methane is burned, and the heat released is transferred to g water at , what final temperature will be reached by the water
Answer:
The answer is 9
Explanation:
Because 5+4=9 lol
which term names the concentration of salts dissolved in a liquid?
Answer:
salinity
Explanation: guess
What is the science behind procrastination? Most descriptive and accurate answer will receive brainliest.
Answer:
Explanation:
Procrastination is a plague to which we are all susceptible. Essentially, procrastination is the avoidance of work or necessary tasks by focusing on more satisfying activities. It’s easy to chalk procrastination up to a lack of self-motivation, lazy habits or incompetence. But in reality, procrastination is chemical; there’s a science to why we prefer relaxing activities to the required.
Procrastination boils down to a battle between the limbic system and the prefrontal cortex. The limbic system is a set of brain structures containing the pleasure center, while the prefrontal cortex controls planning and decision making. The prefrontal cortex is less developed and thus weaker, so often times the limbic system wins out, leading to procrastination.
How many CO2 molecules are in 1 mole of carbon dioxide?
Answer:
I guess 1-mole carbon dioxide contains 6.02 x 10^23 molecules.
The bonding of blank and blank does not involve the blank of electrons
Answer:
Huh? I guess it's
TRUE?Explanation:
Correct me if I'm wrongAnswer:
IT'S FALSE ISN'T IT? YEHCan some help me please
make a punnett square for these two parents AA × aa
Answer:
Aa
Explanation:
all of the punnet squares would be Aa because there is AA to aa
A carbon-carbon double bond is ______ than a carbon-carbon triple bond, and ______ than a carbon-carbon single bond.
Answer:
longer, shorter
Explanation:
A carbon-carbon double bond is longer than a carbon-carbon triple bond, and shorter than a carbon-carbon single bond
I am a gas with a mass number of 19.
Answer:
Element Fluorine
Explanation:
The chemical element fluorine is a gas that has a mass number of 19.
The gas with a mass number of 19 is potassium-39 (K-39).
Potassium-39 is an isotope of potassium, which is an alkali metal element found in Group 1 of the periodic table. The atomic number of potassium is 19, indicating the number of protons in its nucleus, while the mass number represents the total number of protons and neutrons in the atom.
Potassium-39 is the most abundant naturally occurring isotope of potassium, accounting for about 93% of its isotopic composition. It is stable and non-radioactive. Potassium as a whole is an essential element for many biological processes and is found in various foods. It plays a crucial role in nerve function, muscle contraction, and maintaining electrolyte balance in the body.
Learn more about Potassium-39, here:
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Balancing Chemical Equation
C=H2=CH4
Answer:
C + 2H2 ⇒ CH4
Explanation:
In order to balance a chemical equation you need to make sure that the number of atoms on both sides are equal
C + H2 = CH4
C = 1
H = 2
Products:
C = 1
H = 4
H2 = 2 × 2 = 4
C + 2H2 ⇒ CH4
Hope this helps.
What is the molarity of 48.6 g of magnesium (Mg) ions in 4 L H2O? Show cancelation of units to get credit. PLEASE HELP!!!
Answer:
0.50M (1 sig. fig.)
Explanation:
The problem objective is 'Molarity (M)', so set up given data to reduce to moles per liter. That is ...
Molarity = moles Mg/Liters of solution = (48.6g/24.31g·mole⁻¹)/(4Liters) = 0.499794323M (calc. ans.) ≅ 0.5M (1 sig. fig.)
what is the type 1 binary compound for MgCl2
Answer:
Explanation:
magnesium chloride
Why are x-rays and the radiation emitted by radioisotopes called ionizing radiation?
Answer:
The radiation has enough energy to knock electrons off some atoms of a bombarded substance producing ions.
Explanation:
Describe the appearance and properties of a gas.
Answer:
A gas is light, the molecules are moving very fast, and a gas can change forms due to temp of the area its in.
