Chemistry College
Answers
Answer 1
Answer: The main type of elements found in the upper right part of the periodic table are the Nonmetals. The correct option is C.
Explanation:
The Periodic table of elements describes the properties of elements which varies in regular manner. Some of these chemical properties includes:
--> Ionisation energy
--> Atomic radii
--> Ionic radii
--> Electron affinity
--> electronegativity
--> metallic Character
--> Atomic volume
It organizes known elements based on these chemical properties. From the features of a Periodic table of elements, they occur in;
--> GROUPS(when similar elements are the arranged in numbered columns). These groups are the alkali metals, alkaline earth metals, halogens and noble gases.
--> PERIODS( when arranged in numbered rows).
Every element can either be classified as a metal, nonmetal or semi metal. NONMETALS are poor conductors of heat and electricity. They are clustered in the upper right-hand corner of the periodic table.
Related Questions
A solution is created by dissolving 11.0 grams of ammonium chloride in enough water to make 235 mL of solution. How many moles of ammonium chloride are present in the resulting solution
Answers
Answer:
The correct answer is 0.206 moles
Explanation:
According to the given scenario, the calculation of the number of moles of ammonium chloride is available in the resulting solution is given below:
Given that
Amount of [tex]NH_4Cl[/tex] is 11.0 grams
And, the volume is 235 mL
Now the molar mass of [tex]NH_4Cl[/tex] is 53.49g/mol
So, the number of moles presented is
= 11.0 ÷ 53.49
= 0.206 moles
hence, the number of moles of ammonium chloride are available in the resulting solution is 0.206 moles
You decide to put your growing knowledge of chemistry to profit by making and selling boutique soaps that are ultra mild and have an almost neutral pH. What is the pH of your best liquid soap made from a fatty acid (HA) that has a pKa value of 2.0?
a. 8.5
b. 9.0
c. 7.5
d. 2.0
e. 8.0
Answers
your stb is going to be DD 2.0
Three people are installing equipment. Cyrus is installinga heating system, Aletta is installing a cooling system, and
Francis is installing a cooling system,
Which best describes the possible equipment they could install?
O Cyrus is installing an air conditioner, Aletta is installing a furnace, and Francis is installing a heat engine.
O Cyrus is installing a furnace, Aletta is installing a heat pump, and Francis is installing an air conditioner.
O Cyrus is installing a heat pump, Aletta is installing a thermostat, and Francis is installing a furnace.
O Cyrus is installing a thermostat, Aletta is installing an air conditioner, and Francis is installing a heat engine.
Answers
Answer:
B) Cyrus is installing a furnace, Aletta is installing a heat pump, and Francis is installing an air conditioner.
Explanation:
I got the question right
Answer:
its b
Explanation:
Because i know
50 Points
Which of the following sequences of elements would all have four valence electrons?
B, Si, As, Te
C, Si, Ge, Sn
O, S, Se, Te
Ga, Ge, As, Se
Answers
Answer:
C, Si, Ge, Sn
Explanation:
Answer:
si,ge,sn
Explanation:
i looked at a periodic table
brass paper clips that have a golden color have 33% zinc and 67% copper. paper clips made of brass,which appear more red in color, have almost 90% copper and only 10% zinc. If the paper clips are the same size, which of the following will be different? height, density, shape, or volume
Answers
Answer:
Density
Explanation:
6. What is the speed of a wave?
Answers
Speed equals wave length. Wave speed is the distance a wave travels per second
If a 2.75 L gas sample is held at a constant temperature, and its pressure is changed from 750.0 torr to 360.0 torr, what will the final volume be?
Answers
Answer:
5.73 Liters
Explanation:
Pressure decreases => Volume increases (Boyles Law)
V(final) = 2.75L (750Torr/360Torr) = 5.73 Liters
Which theory was contradicted by experiments with the photoelectric effect?
Light spreads out after it passes through a small opening.
As soon as light strikes metal, electrons will be ejected.
Visible light, regardless of color, will cause the ejection of electrons when striking metal.
The kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
Answers
Answer:
C Visible light...
Explanation:
Answer:c on edge 2023
Explanation:
Calculate the number of moles of iodine in 7.68×10^25 molecules of I2
Answers
Answer:
127.57 moles
Explanation:
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{7.68 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 127.574750...[/tex]
We have the final answer as
127.57 moles
Hope this helps you
what are tge source of lipids and their location in the body?
Answers
Answer:
Lipids are fatty, waxlike molecules found in the human body and other organisms. They serve several different roles in the body, including fueling it, storing energy for the future, sending signals through the body and being a constituent of cell membranes, which hold cells together.
Explanation:
In biology and biochemistry, a lipid is a macrobiomolecule that is soluble in nonpolar solvents. Non-polar solvents are typically hydrocarbons used to dissolve other naturally occurring hydrocarbon lipid molecules that do not dissolve in water, including fatty acids, waxes, sterols, fat-soluble vitamins, monoglycerides, diglycerides, triglycerides, and phospholipids.
If you had an aqueous mixture that contained Ag+ , K+ , and Pb2+ cations, how many different solids could precipitate if a chloride solution was added?
Answers
Answer:
Two, KCl and PbCl₂.
Explanation:
Hello!
In this case, since the addition of chloride ions promote the following three ionic reactions:
[tex]Ag^+(aq)+Cl^-(aq)\rightleftharpoons AgCl(s)\\\\K^+(aq)+Cl^-(aq)\rightleftharpoons KCl(aq)\\\\Pb^{2+}(aq)+Cl^-(aq)\rightleftharpoons PbCl_2(s)[/tex]
We can infer that both silver chloride and lead (II) chloride are precipitated products as their Ksp are 6.56x10⁻⁴ and 1.59x10⁻⁵ respectively, which means they are merely soluble in water.
Best regards!
Silver chloride (AgCl), Potassium chloride (KCl) and Lead chloride (Pb2Cl) are produced when added the solution of chlorine.
If a chloride solution is added in the container which contains aqueous mixture that comprise of Ag+ , K+ , and Pb2+ cations, three different solid precipitate will be formed. Silver chloride (AgCl), Potassium chloride (KCl) and Lead chloride (Pb2Cl) are the three solid precipitate that will formed when the chlorine in added to the solution.
The chlorine is an anion which reacts with all three Ag+, K+ and Pb2+ cations produces Silver chloride (AgCl), Potassium chloride (KCl) and Lead chloride (Pb2Cl) respectively so we can conclude that Silver chloride (AgCl), Potassium chloride (KCl) and Lead chloride (Pb2Cl) are produced when added the solution of chlorine.
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can the list below. Which did you include in your answer? Foam is a colloid. Colloids include gas dispersed in a liquid. Colloids include gas dispersed in a solid.
Answers
Answer:
Its all of them
Explanation:
A mixture of 5L of H2 and 3L O2 reacts to form H2O (g) at constant T and P .Find the
volume of H2O gas obtained. 2H2 (g) + O2(g)
2H2O(g)
Answers
The volume of H₂O = 5 L
Further explanation
Given
5L of H₂ and 3L O₂
Reaction
2H₂ (g) + O₂(g) ⇒2H₂O(g)
Required
The volume of H₂O
Solution
Avogadro's hypothesis:
In the same T,P and V, the gas contains the same number of molecules
So the ratio of gas volume will be equal to the ratio of gas moles
mol H₂ = 5, mol O₂ = 3
Find limiting reactants
From equation, mol ratio H₂ : O₂ = 2 : 1, so :
[tex]\tt H_2\div O_2=\dfrac{mol~H_2}{coefficient}\div \dfrac{mol~O_2}{coefficient}\\\\=\dfrac{5}{2}\div \dfrac{3}{1}=2.5\div 3\rightarrow H_2~limiting~reactant(smaller~ratio)[/tex]
Find volume H₂O
mol H₂O based on mol H₂, and from equation mol ratio H₂ : H₂O=2 : 2, so mol H₂O = 5 mol and the volume also 5 L
What theoretical volume of hydrogen gas should be produced in a chemical reaction of HCl(aq) with 0.0300 g of magnesium at 21.8 o C, when the dry gas pressure is 735.6 torr
Answers
Answer:
The correct answer is 0.3088 L.
Explanation:
The reaction will be,
Mg + 2 HCl = MgCl2 + H2
The moles can be determined by using the formula,
Moles = Given mass/Molecular mass
Based on the given information, the weight of Mg is 0.0300 g, and the molecular mass of Mg is 24.30 g/mol.
Now putting the values we get,
Moles = 0.300 g/24.30 g/mol = 0.01235 mol
From the reaction, it can be seen that 1 mol of Mg produces 1 mol of H2 gas then 0.01235 mol of Mg will produce 0.1235 mol of H2.
The volume of hydrogen gas produced can be determined by using the gas law equation,
V = nRT/P
Here V is volume in L, P is the pressure in atm, R is the gas constant, which is 0.08206, and T is temperature in Kelvin, 21.8 degree C = 21.8 + 273.15 = 294.95 K.
P = 735.6 torr = 735.6 * 0.00132 atm = 0.9679 atm
V = 0.1235 mol * 0.08206 atm L/mol/K * 294.95 K/0.9679 atm
V = 0.3088 L
Hence, the volume of hydrogen gas produced is 0.3088 L.
Determine what elements are denoted by the following electrons: [Kr] 5s2 4d10 5p3
Answers
Answer:
Antimony Sb
Explanation:
ntimony atoms have 51 electrons and the shell structure is 2.8.18.18.5.
The ground state electron configuration of ground state gaseous neutral antimony is [Kr].4d10.5s2.5p3
what specific heat of a solid that requires 124 J of heat to raise the temperature of 95.5 g of substance from 20.0 to 25.0
Answers
Answer: =0.26J/gC
Explanation:
From the question, we are informed that the solid requires 124 J of heat to raise the temperature of 95.5 g of substance from 20.0 to 25.0. The specific heat required would be:
Specific heat = energy required / (temperature difference × mass )
=124J / (5C × 95g)
= 124J / 495gC
=0.26J/gC
Density is what formula
Answers
Density Formula: Density = Mass / Volume
Density = mass divided by volume
A gas is initially confined to a 1.00 L vessel at 3.00 atm of pressure. A valve connecting the 1.00 L vessel to a 3.00 L vessel is opened and the gas expands. What is the final pressure in atm of the gas after the valve is opened, assuming that the volume of the connecting tube is negligible and there is no temperature change?
a. 0.250 atm
b. 0.500 atm
c. 0.750 atm
d. 1.00 atm
e. None of these choices
Answers
Answer:
c. 0.750 atm.
Explanation:
Hello!
In this case, since the two vessels have different volume, we can see that the gas is initially at 3.00 atm into the 1.00-L vessel, but next, it is allowed to move towards the 3.00-L vessel, meaning that the final volume wherein the gas is located, is 4.00 L; therefore, we use the Boyle's law to compute the final pressure:
[tex]P_2V_2=P_1V_1\\\\P_2=\frac{P_1V_1}{V_2} \\\\P_2=\frac{3.00atm*1.00L}{4.00L}\\\\P_2=0.750atm[/tex]
Therefore the answer is c. 0.750 atm.
Best regards!
write the formula the alkenes that contain four,six,eight and ten carbon atoms
Answers
The general formula for alkenes is CnH2n
So, if it has 4 carbon atoms it would be C4H8
Six carbon atoms - C6H12
Eight - C8H16
Ten - C10H20
Answer:
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Please help me I am timed
When a material changes from one phase to another it is called a
A) mechanical change
OB) potential change
OC) physical change
OD) chemical change
Answers
Most likely b,c or d sorry but idk I’m just helping other people answer by eliminating one answer
is the quantity of heat needed to
convert a fixed mass of liquid at a fixed
temperature to the gaseous state.
A. Heat of sublimation
B. Heat of pressure
C. Heat of viscosity
D. Heat of vaporization
Answers
D. Heat of vaporization, because the liquid is turning into a gas phase (vapor)
Please help me will Mark BRAINLIEST if you give me the right answer
Answers
Answer:
D the proton are positively charged.
Explanation:
What is the change in internal energy ( ΔU ) of the system if q = –8 kJ and w = –1 kJ for a certain process?
Answers
Answer:
Change in internal energy (ΔU) = -9 KJ
Explanation:
Given:
q = –8 kJ [Heat removed]
w = –1 kJ [Work done]
Find:
Change in internal energy (ΔU)
Computation:
Change in internal energy (ΔU) = q + w
Change in internal energy (ΔU) = -8 KJ + (-1 KJ)
Change in internal energy (ΔU) = -8 KJ - 1 KJ
Change in internal energy (ΔU) = -9 KJ
When R-3-methylpent-1-ene is treated with aqueous mercury (II) acetate, then sodium borohydride, NaBH4, the major product(s) is/are:__________.
A) a single chiral compound
B) a single optically active compound
C) a pair of enantiomers
D) a pair of diastereomers
Answers
Answer:
D) a pair of diastereomers
Explanation:
The reaction is commonly referred to as the oxomercuration of alkenes. It involves the reaction of an alkene with mercury (II) acetate, then sodium borohydride, NaBH4. The product is an alkanol.
The mechanism of this reaction is shown in the image attached. We can see that the product contains two chiral centers. The reaction yields a pair of diastereomers.
Balance this chemical equation: Ca + O2 ----> CaO
Answers
I don’t know but I think it’s co2
Which of the following has kinetic energy? Wind blowing at 3 km/h A fully stretched elastic band A boulder sitting on top of a hill An unused battery
Answers
There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, the correct option is option A.
What is energy transfer in thermodynamics?
Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
To move any object energy is required so work has to be done by the gas to the piston. Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. Wind blowing at 3 km/h has kinetic energy. Anything that move possess kinetic energy.
Therefore, the correct option is option A.
Learn more about energy transfer, here:
https://brainly.com/question/18649915
#SPJ2
2. Predict the concentration if the solution is diluted to a volume of 1 liter. Show the calculation of this concentration, include units in all your work.
Answers
The question is incomplete, the complete question is;
Predict the concentration if a 0.5 M solution, with a volume of 500 mL, is diluted to a volume of 1 liter. Show the calculation of this concentration, include units in all your work.
Answer:
0.25 M
Explanation:
From;
C1V1 =C2V2
C1= initial concentration = 0.5 M
C2 = final concentration = the unknown
V1 = initial volume = 500 ml
V2 = final volume = 1 litre = 1000 ml
substituting values;
0.5 * 500 = C2 * 1000
C2 = 0.5 * 500/1000
C2 = 0.25 M
P4 (s) + 6Cl2 (g) -> 4 PCL3 (l)
What is the maximum amount of phosphorus trichloride that can be formed if 10 molecules of P 4 are mixed with 36 molecules of chlorine?
Answers
Answer:
24 molecules of phosphorus trichloride can be formed
Explanation:
Based on the equation:
P4(s) + 6Cl2(g) → 4PCl3
1 mole of P4 reacts with 6 moles of Cl2 to produce 4 moles of PCl3.
When 10 molecules of P4 react, 60 molecules of Chlorine are needed. As there are just 36 molecules, Cl2 is limiting reactant.
If 36 molecules of chlorine are added, molecules of PCl3 produced are:
36 molecules Cl2 * (4 PCl3 / 6 Cl2) =
24 molecules of phosphorus trichloride can be formed
The maximum amount of phosphorus trichloride that can be formed from 10 molecules of P4 and 36 molecules of chlorine would be 24 molecules.
From the balanced equation of the reaction, the mole ratio of P4 to Cl2 to PCl3 is 1:6:4.
Thus, for every 1 molecule of P4, 6 molecules of Cl2 would be required.
In the same vein, 10 molecules of P4 will require 60 molecules of Cl2. But there are just 36 molecules of Cl2. Thus, Cl2 is a limiting reactant.
The mole ratio of Cl2 to PCl3 is 6:4 or 3:2.
Hence, with 36 molecules of Cl2, the maximum amount of PCl3 that can be formed would be:
36 x 2/3 = 24 molecules.
More on stoichiometric calculations can be found here: https://brainly.com/question/8062886?referrer=searchResults
Sodium Bromide
Sodium Charge:
Bromine Charge:
Formula:
Lithium Oxide
Lithium Charge:
Oxygen Charge:
Formula:
Magnesium Sulfide
Magnesium Charge:
Sulfur Charge:
Formula:
Boron Chloride
Boron Charge:
Chlorine Charge:
Formula:
Aluminum Sulfide
Aluminum Charge:
Sulfur Charge:
Formula:
Answers
Answer:
Sodium Bromide
Sodium Charge: +1
Bromine Charge: -1
Formula: NaBr
Lithium Oxide
Lithium Charge: +1
Oxygen Charge: -2
Formula: Li₂O
Magnesium Sulfide
Magnesium Charge: +2
Sulfur Charge: -2
Formula: MgS
Boron Chloride
Boron Charge: +3
Chlorine Charge: -1
Formula: BCl₃
Aluminum Sulfide
Aluminum Charge: +3
Sulfur Charge: -2
Formula: Al₂S₃
Hope that helps. :)
Someone who pushes a box 10 meters with 5 newtons of force did how
much work?
*
Answers
Answer:
50 J
Explanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 5 × 10
We have the final answer as
50 J
Hope this helps you