Answer:
1. Soluble.
2. Electrolyte.
Explanation:
Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.
For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.
In Chemistry, dissolution can be defined as the process of dissolving or dissociating a solute in solid, liquid or gaseous phase into fragmented particles by a solvent in order to form a solution. For dissolution to occur in solids, the crystalline structure of the substance must be broken up so as to release ions, atoms or molecules to produce a solution. For liquid and gases, the substance to be dissolved must form a non-covalent bond with the solvent to produce a solution.
Hence, a compound that dissolves in water to produce an aqueous solution is said to be soluble in water. Also, the solute of an aqueous solution that conducts electricity is called an electrolyte.
(d) Other
sugar molecules become
_____ and are carried away from the crystal.
the force of attraction is
Answer:
liquid
Explanation:
defiantly
If 75 g. of Potassium Chloride (ionic compound) is dissolved in 250 grams of
water, what will be the freezing point of the solution? Kf = 1.86
Answer:
[tex]T_{f,sol}=-15.0\°C[/tex]
Explanation:
Hello there!
In this case, for these problem about the colligative property of freezing point depression, it is possible set up the following equation:
[tex]T_{f,sol}-T_{f,water}=-i*m*Kf[/tex]
Whereas the van't Hoff's factor, i, is 2 since KCl is ionized in two ions (K+ and Cl-); and the molality (m) of the solution is computed by:
[tex]m=\frac{75g*\frac{1mol}{74.55g} }{250g*\frac{1kg}{1000g} } \\\\m=4.02mol/kg[/tex]
Thus, since the freezing point of water (ice) is 0°C, we obtain the following freezing point of the solution by plugging in:
[tex]T_{f,sol}=-(2)(4.02mol/kg)(1.86\°C/mol*kg)\\\\T_{f,sol}=-15.0\°C[/tex]
Best regards!
3. Jordan built a model of a neutral helium atom.
Nucleus
Proton
Neutron
Electron
What change would fix the mistake in Jordan's model?
A rectangular block has dimension 20m x10mx5m and mass of 400kg calculate the density of the rectangular block
Answer:
0.4 kg/m^3
Explanation:
v (volume) = 20m x 10m x 5m = 1000 m^3
w (weight) = 400 kg
d (density) = w / v
d = 400 / 1000 = 0.4 kg per cubic meter (kg/m^3)
I apologize if this is a little complex, however all of the math is there, if you're interested then look it over. Otherwise I've provided the answer in the units used for the dimensions and weight provided.
What is the purpose of replication?
1-to make an RNA template from DNA
2-to produce copies of a DNA molecule
3-to move mRNA through the ribosome
4-to change the number, type, or order of bases in DNA
Answer:
2-to produce copies of a DNA molecule
Please disregard this
well i need points
Explanation:
thanks
Which product forms from the synthesis reaction between lithium (Li) and oxygen (O)?
A. Li2O
B. LiO
C. LiO2
D. Li2O2
Answer:
A Li2O
Explanation:
Li has a 1+ charge and O has a 2- charge so to balance the charges there needs to be 2 Li for every 1 O
The product forms from the synthesis reaction between lithium (Li)and oxygen (O) is Li₂O. The correct option is A.
What is synthesis reaction?
Synthesis reaction is the reaction when two or more products combine to form a single product.
An example of a synthesis reaction is the combination of sodium (Na) and chlorine (Cl) to produce sodium chloride (NaCl).
Thus, the correct option is A. Li2O.
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Graphite, an allotrope of carbon, is converted into cubic diamond through a process that may take a billion years or longer. As illustrated above, scientists can make synthetic diamonds using a certain process in about one week. However, these synthetic diamonds have carbon atoms in a hexagonal lattice. Diamonds with a carbon atoms in a cubic lattice are not produced even though they are thermodynamically more stable than hexagonal diamond. Which of the following best justifies why the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond?
a. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much greater than the amount of energy required to create hexagonal diamond.
b. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much smaller than the amount of energy required to create hexagonal diamond.
c. The activation energy needed to form cubic diamond is much less than the activation energy needed to form hexagonal diamond.
d. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Answer:
The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Explanation:
The activation energy refers to the minimum energy that reacting species must possess before they can undergo a particular chemical reaction.
This implies that if species do not possess the activation energy, they hardly undergo a given reaction. The activation energy is the barrier between reactants and products.
Hence, a reaction that has a very high activation energy occurs slowly or may not even occur. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond hence the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond.
Why is there not a constant molar volume for solids and
liquids?
a Solid and liquid particles are packed close together,
b The densities of solids and liquids are variable.
с
The volume of a solid or a liquid has very little
empty space.
d All of the above
Answer:
all of the above
Explanation:
i got the answer right on cK-12
what part of of the universe is less than 1 km in diameter
Answer:
Meteoroids
Explanation:
Meteoroids are the elements of the universe that have the smallest diameter among all elements, reaching less than 1 km in diameter. They are any rocky or metallic body, which exists in space and does not reach more than 100 meters. It is common for meteoroids to fall to earth, but their impact is not as destructive as the impact of other space bodies, due to their tiny size.
What are characteristics of absorption spectra? Check all that apply.
Light is absorbed, which produces characteristic lines.
| Light is emitted, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are brightly colored on a black background.
Lines are produced by electrons being excited.
Lines are produced from electrons returning to a lower energy level.
Answer:
Light is absorbed, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are produced by electrons being excited.
Explanation:
Edg
The characteristics of absorption spectra light is absorbed, which produces characteristic lines, lines are dark on a visible light background and Lines are produced by electrons being excited.
What is absorption spectra?The term "absorption spectroscopy" applies to spectroscopic methods that assess how much radiation interacts with a sample and is absorbed as a proportion of frequency or wavelength. The sample takes in photons, meaning energy, from the emitting field.
What are electrons?The electron would be a subatomic particle with a negative one fundamental charge electric charge. Due to their lack of components or substructure, electrons, which have become part of the lepton particle family's first generation, could be typically regarded to be elementary particles.
The percentage of incoming electromagnetic energy that a material absorbs across a variety of frequencies is displayed in the material's absorption spectrum. In a way, an emission spectrum would be the converse of an absorption spectrum.
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Oxidation elements of the numbers H2CO2
how are electrons arranged in molecules of compounds?
Answer:
electrons are always in the outer shell
When an electron moves, it absorbs or produces energy in the form of photons. Electrons surround the nucleus, which is made up of protons and neutrons, and they all form an atom. The exchange or sharing of electrons between atoms is the main cause of chemical bonding.
Hope this helps you :)
what is the speed of the electromagnetic waves please solve using correct units ill give brainliest.
Answer:
3 m
Explanation:
We'll begin by converting 99.9 MHz to Hz. This can be obtained as follow:
1 MHz = 10⁶ Hz
Therefore,
99.9 MHz = 99.9 MHz × 10⁶ Hz / 1 MHz
99.9 MHz = 99.9×10⁶ Hz
Finally, we shall determine the wavelength. This can be obtained as follow:
Frequency (f) = 99.9×10⁶ Hz
Velocity (v) = 3×10⁸ m/s
Wavelength (λ) =?
Velocity = wavelength × frequency
v = λf
3×10⁸ = λ × 99.9×10⁶
Divide both side by 99.9×10⁶
λ = 3×10⁸ / 99.9×10⁶
λ = 3 m
Thus, the wavelength of the electromagnetic wave is 3 m.
22 Which of the following statements is true for all loving organisms? A. All living organisms are made of one or more cells with a cellular membrane and have a cell wall. B. All living organisms are made of one or more cells with a cellular membrane and have a nucleus. C. All living organisms are made of one ore more cells with a cellular membrane and genetic material. D. All living organisms are made of one or more cells with a cellular membrane and have chloroplast
Answer:
C
Explanation:
Ape-x
There are about 26 deuterium atoms for every million hydrogen atoms across the universe, but it is six times as prevalent in the water on Earth and in other solar system bodies. Deuterium has one more ———— than hydrogen.
A. Ionic pair
B. Hydrogen bond
C. Proton
D. Electron
E. Neutron
Answer:
Option E
Deuterium has one more neutron than hydrogen
Explanation:
Deuterium is an isotope of Hydrogen and hence there will variation in the number of neutron
Hydrogen has 0 neutron
Deuterium has 1 neutron and
Tritium has 2 neutron
Thus option E is correct
In the universe, there are approximately 26 deuterium atoms for every million hydrogen atoms. Deuterium has one more neutron than hydrogen.
The correct option is E.
What is deuterium?Deuterium is a stable isotope of hydrogen, whose atomic weight is 2.014.
It is also called heavy hydrogen, and it contains one neutron and one proton.
In nuclear fusion reactors, deuterium is employed as a tracer, while in heavy water moderated fission reactors, it is utilized to slow down neutrons.
Thus, the correct option is E.
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A car accelerates away from the starting line at 3.6 m/s2 and has the mass of 2400 kg. What is the net force acting on the vehicle?
Answer:
F = m x a
F = 2400 kg x 3.6 m/s2
F = 8,640 N
Explanation:
A common ancestor is an organism that is the
O direct ancestor of two or more different organisms
O direct ancestor of one organism.
O indirect ancestor of two or more different organisms.
O indirect ancestor of one organism.
A common ancestor is an organism that is the direct ancestor of two or more different organisms.
A common ancestor refers to an organism that is shared by multiple organisms, serving as the direct predecessor to those organisms. It is the point in evolutionary history where two or more distinct lineages diverged from a single ancestral lineage. This means that the common ancestor is the starting point from which different species or groups of organisms evolved over time.
In the context of evolution, organisms share common ancestry due to the process of descent with modification. Through genetic inheritance and gradual changes in traits over generations, new species arise from a common ancestor. As these species undergo divergent evolution, they develop distinct characteristics and adaptations, eventually becoming separate lineages.
Hence, the correct option is the direct ancestor of two or more different organisms.
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I need to turn in in 5 min
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Identify the products formed in this Brønsted-Lowry reaction. HCO−3+HBrO↽−−⇀acid+base
Answer:
[tex]HCO^-_3+HBrO\rightleftharpoons H_2CO_3+BrO^-[/tex]
Explanation:
Hello there!
In this case, according to the Brønsted-Lowry theory of acids, it is possible to realize that HBrO acts as the Brønsted-Lowry acid as it has a free hydrogen to give away to HCO₃⁻ which acts as the Brønsted-Lowry base able to accept the incoming hydrogen; therefore, the Brønsted-Lowry reaction is:
[tex]HCO^-_3+HBrO\rightleftharpoons H_2CO_3+BrO^-[/tex]
Best regards!
In the Brønsted-Lowry reaction between HCO⁻₃ and HBrO, the formed acid is H₂CO₃ and the formed base is BrO⁻.
According to Brønsted-Lowry acid-base theory:
An acid is a substance that donates H⁺.A base is a substance that accepts H⁺.Let's consider the following Brønsted-Lowry reaction.
HCO⁻₃ + HBrO ⇄ acid + base
HBrO can only donate H⁺, so it is an acid.HCO⁻₃ can accept or donate H⁺. Here, it will accept the H⁺ donated by HBrO and behave as a base.The resulting reaction is:
HCO⁻₃ + HBrO ⇄ H₂CO₃ + BrO⁻
H₂CO₃ can donate H⁺ so it is an acid.BrO⁻ can accept H⁺ so it is a base.In the Brønsted-Lowry reaction between HCO⁻₃ and HBrO, the formed acid is H₂CO₃ and the formed base is BrO⁻.
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Identify the kind(s) of intermolecular forces that would occur between the solute and solvent in an acetic acid (which is polar and contains an OHOH group) solution. Check all that apply. Check all that apply. dispersion hydrogen bonding ion-dipole dipole-dipole
Explanation:
The acetic acid is a polar compound. The polar molecules have a positive and negative extreme for this reason they are dipoles. The dipoles can attract other dipoles or ions. So, it can establish ion-dipole and dipole-dipole forces with the solute. In addition, acetic acid has a hydroxyl group that can interact with hydrogens or other very electronegative atoms (oxygen, nitrogen and fluor) forming hydrogen bridge junctions.
The pressure of a sample of dry air is held constant 2.25 atm while the temperature is
decreased from 100°C to 7.0°C. The original volume of the sample is 43 L. Which of
the following is closest to the final volume of the sample?
A) 3.0L
B) 32L
C) 57 L
D) 610 L
The pressure of a sample of dry air is held constant 2.25 atm while the temperature is decreased from 100°C to 7.0°C. The original volume of the sample is 43 L. 32 L is the closest to the final volume of the sample?
What is Charles's law?A law states that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature.
Charles’ law:
[tex]\frac{V_1}{T_1}[/tex] = [tex]\frac{V_2}{T_2}[/tex]
The volume and temperature of a fixed amount of gas at a constant pressure are directly proportional.
To use the equation, the temperature must be in Kelvin.
[tex]V_2[/tex] = [tex]\frac{V_1}{T_1} XT_2[/tex]
[tex]V_2[/tex] = 32 L
[tex]V_2[/tex]= 32 L
Hence, the correct answer is B.
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How many liters of nitrogen gas (N₂) are required to produce 7.5 x 10²⁶ molec NH₃ gas with excess of hydrogen gas at STP?
Answer: The volume of nitrogen gas that is required is 13944 L.
Explanation:
Given values:
Number of molecules of ammonia gas = [tex]7.5\times 10^{26}[/tex]
According to the mole concept:
[tex]6.022\times 10^{23}[/tex] number of molecules are present in 1 mole of a compound
So, [tex]7.5\times 10^{26}[/tex] number of molecules will be present in [tex]\frac{1}{6.022\times 10^{23}}\times 7.5\times 10^{26}=1.245\times 10^3 moles[/tex] of ammonia gas
The chemical equation for the formation of ammonia gas follows:
[tex]N_2 (g) + 3H_2(g) \rightarrow 2NH_3(g)[/tex]
According to the stoichiometry of the reaction:
2 moles of ammonia gas are produced from 1 mole of nitrogen gas
So, [tex]1.245\times 10^3[/tex] moles of ammonia gas will be produced from [tex]\frac{1}{2}\times 1.245 \times 10^3=6.225\times 10^2[/tex] moles of nitrogen gas
At STP conditions:
1 mole of a gas occupies 22.4 L of volume
So, [tex]6.225 \times 10^2[/tex] moles of nitrogen gas will occupy [tex]\frac{22.4 L}{1 mol}\times 6.225\times 10^2 moles=13944 L[/tex] of volume
Hence, the volume of nitrogen gas that is required is 13944 L.
Please answer this question correctly
Answer:
a d c a b b
Explanation:
Brainliest will be given to correct answer :)
Chemistry II Help please! Last question on my homework and I'm stuck.
Thank you!
Answer: [tex]\Delta G[/tex] for the reaction is -90kJ
Explanation:
The balanced chemical reaction is,
[tex]2H_2S(g)+SO_2(g)\rightarrow 3S_{rhombic}(s)+2H_2O(g)[/tex]
The expression for Gibbs free energy change is,
[tex]\Delta G=[n\times G_{products}]-[n\times G_{reactants}][/tex]
Putting the values we get :
[tex]\Delta G=[3\times G_f{S,rhombic}+2\times G_f{H_2O}]-[2\times G_f{H_2S}+1\times G_f{SO_2}][/tex]
[tex]\Delta G=[(3\times 0kJ/mol)+(2\times -229kJ/mol)]-[(2\times -34kJ/mol) +(1\times -300kJ/mol)][/tex]
[tex]\Delta G=-90kJ[/tex]
Thus [tex]\Delta G[/tex] for the reaction[tex]2H_2S(g)+SO_2(g)\rightarrow 3S_{rhombic}(s)+2H_2O(g)[/tex] is -90kJ
What is the difference between Benedict’s test and Barfoeds test?
Answer:
Benedict's test would determine if the sample is a reducing sugar, and Barfoed's test would determine if it is a monosaccharide or disaccharide.
What is the pH of 0.42M aniline?
Answer:
Kb=x^2/0.42-x (eqn to calculate)
basicity (pkb) 9.3
Explanation:
Is anyone good at chemistry if so can someone help me please ?
(NO LINKS)
Since pH + pOH = 14, given a pOH of 4.53, our pH would be 14 - 4.53 = 9.47. And since the pH is greater than 7, this solution is basic. So, the correct answer choice would be D.
5. What is the pH of a solution with p0H= 8.5? Is this an acid, base, or neutral?
Answer:
pH = 5.5 and it is an acid
Explanation:
Fr the question given above, the following data were obtained:
poH = 8.5
pH =?
pH + pOH = 14
pH + 8.5 = 14
Collect like terms
pH = 14 – 8.5
pH = 5.5
pH scale reads as follow:
0 to 6 => Acidic
7 => Neutral
8 to 14 => Basic
With the above pH scale, we can conclude that the solution with pH 5.5 is acidic.
5.50 L of a 0.190 M CaCl2M CaCl2 solution
How do you find Grams?
Answer:
115.891
Explanation:
Molarity is equal to moles/liters so to get moles we multiply molarity by liters, after this we multiply the moles by the total atomic weight of the compound to get grams