Answer:
ANSWER is E
Explanation:
2H₃PO₄ + 3Ca(OH)₂→ 6H₂O + Ca₃(PO₄)₂
Answer:
First step is to find what the products would be. Since this seems to be a double displacement, you get: H3PO4(aq)+Ca(OH)2(aq)→ H2O(L)+Ca3(PO4)2(s)
You know the products because H has a charge of +1, so PO4 must have a charge of -3, and since OH has a charge of -1, Ca must be +2. Then make each compound have a net charge of 0. H20 is a liquid since aq solutions have liquid water. Ca3(PO4)2 is a solid, use the solubility rules.
Lastly, balance the equation: 2H3PO4(aq)+3Ca(OH)2(aq)→ 6H2O(L)+Ca3(PO4)2(s)
So the salt formed is Ca3(PO4)2
Write a balanced net ionic equation for each of the following aqueous metathesis reactions. Classify each reaction as a neutralization, precipitation, or gas--forming reaction.
A. Hydrobromic acid and cesium hydroxide.
B. Sulfuric acid and sodium carbonate.
C. Cadmium chloride and sodium sulfide.
Answer:
See explanation
Explanation:
A. This is a neutralization reaction.
Molecular equation;
HBr(aq) + CsOH(aq) ---------> CsBr(aq) + H20(l)
Complete ionic equation;
H^+(aq) + Br^-(aq) + Cs^(aq) + OH^-(aq) --------> Cs^+(aq) + Br^- + H20(l)
Net ionic equation;
H^+(aq) + OH^-(aq) --------> H20(l)
B. This is a gas forming reaction;
H2SO4(aq) + Na2CO3(aq) ------->Na2SO4(aq) + H2O(l) + CO2(g)
Complete ionic equation;
2H^+(aq) + SO4^-(aq) + 2Na^+(aq) + CO3^2-(aq) ------->2Na^+(aq) + SO4^-(aq) + H2O(l) + CO2(g)
Net ionic equation;
2H^+(aq) + CO3^2-(aq) -------> + H2O(l) + CO2(g)
C. This a precipitation reaction
Molecular equation;
CdCl2(aq) + Na2S(aq) ------->CdS(s) + 2NaCl(aq)
Complete ionic equation;
Cd^2+(aq) + 2Cl^-(aq) + 2Na^+(aq) + S^2-(aq) ---------> CdS(s) + 2Na^+(aq) + 2Cl^-(aq)
Net ionic equation;
Cd^2+(aq) + S^2-(aq) ---------> CdS(s)
Will give brainlist please help
HELP ME PLS 20 POINTS
Answer:
1- Se 2-Na 3- I guess Si as well 4-Ar 5-O
Explanation:
Ionization energy increases as we go right in periodIonization energy increases as we go upwards in groupsAtomic radius increases as we go downwards in groupsAtomic radius increases as we go left in periodsAtomic radius decreases as we go right in periods so when atoms loses electron or more the smaller its radius becomes What does the fossil record tell us about the evolution of the hominin skull?
The face grew wider as hominins evolved
The face stuck out farther from the rest of the skull as hominins evolved
The part of the skull surrounding the brain grew larger as hominins evolved
The part of the skull surrounding the brain grew more pointed as hominins evolved
Answer:
The part of the skull surrounding the brain grew larger as hominins evolved
The skulls are all casts of the original fossils. By determining the skulls we can explore the characteristics which reflect the evolutionary relationships. The part of the skull surrounding the brain grew larger as hominins evolved. The correct option is C.
What is hominin evolution?Hominin evolution is characterized by two mains trends, transition to bipedality and increase in brain size. Fossil evidence shows that both trends had a major impact on the structure and function of the hominin skull.
Hominins or homo species are characterized by relatively and absolutely large brains, a modern skeleton, reduced tooth and jaw size and an involvement in cultural activities. Hominins have a larger cranial capacity and this is an indication of their brain size.
In addition, the contour of the hominin forehead eventually shifted from being angled to more vertical.
Thus the correct option is C.
To know more about hominin skull, visit;
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3.
Question
Many chemical warfare reagents readily convert into reactive 3-membered ring intermediates (although
maybe not the Joker's venom from the Batman comics). In turn, these intermediates can damage DNA by
what type of chemical reaction?
Your answer
O a. Elimination
O b. Sn1
OC. SN2
O d. None of the above
Answer:
I think it's letter B
Explanation:
Hope it helps correct if I'm wrong
Which characteristic is a property of molecular
substances?
A. good heat conductivity
B. good electrical conductivity
C. low melting point
D. high melting point
Answer:
The correct answer is : C.
Explanation:
The characteristics of a property of molecular substances is low melting point.
Phosphorus is implanted into silicon. The implant parameters are a dose of 1015cm-2at an energy of 150keV.a)Find the depth of the peak of the implant profile and its value at that depth.b)If the wafer originally had 1016cm-3of boron uniformly distributed throughout, find the depth(s) at which the concentration of phosphorus is equal to the concentration of boron.
Answer:
a) ≈ 4.99 / cm^3
b) 0.515 um
Explanation:
Given data:
energy = 150 Kev
dose of 10^15 cm^-2
A) find the depth of the peak of the implant profile and its value at that depth
expression for implant profile = written below in the attached file
value of the peak depth ≈ 4.99 / cm^3
B ) determine the depth at which the concentration of phosphorus is equal concentration of boron
= 0.515 um
attached below is the detailed solution to the problem
a'Zorria Ward
An elevator traveled 15 floors (150 ft) at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?
the direction the elevator traveled
how long the elevator was stationary
O how many times the elevator stopped
O the total mass of the elevator plus anything in it
Explanation:
An elevator traveled 150 ft at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?
Velocity is vector quantity.So it needs direction in addoition to speed.
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion.
Heat of vaporization is the amount of heat required to
A. Evaporate a solid.
B. Evaporate a liquid.
C. Melt a solid.
D. Condense a vapor.
Heat of vaporization is the amount of heat required to melt a solid. Therefore option C is correct.
What is heat of vaporization ?
The amount of energy required to turn a portion of a liquid material into a gas is known as the enthalpy of vaporization, commonly referred to as the heat of vaporization or heat of evaporation. The pressure at which the transition occurs affects the enthalpy of vaporization.
The amount of energy required for one gram of a liquid to evaporate without a change in pressure is known as the heat of vaporization. As the solid or liquid transitions into a less dense state of matter, these energies are required to disperse the intermolecular forces keeping it together.
vaporization is the process by which a material is transformed from its liquid or solid state into its gaseous state. Boiling is the term for the vaporization process when circumstances permit the creation of vapour bubbles within a liquid.
Thus, option C is correct.
To learn more about heat of vaporization follow the link below;
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The amount of heat needed to cause a liquid to evaporate is known as the heat of vaporization. So, option B is right.
When a liquid is heated, the molecules at the surface of the liquid gain enough energy to escape from the liquid and become a gas. This process is called evaporation.
The heat of vaporization is the amount of heat that is required to vaporize one gram of a liquid at a constant temperature.
The heat of vaporization is different for different liquids. For example, it takes 2260 joules of heat to vaporize one gram of water at 100 degrees Celsius.
The heat of vaporization is a measure of the strength of the intermolecular forces in a liquid. The stronger the intermolecular forces, the more heat is required to vaporize the liquid.
Therefore, the answer is B, that the heat of vaporization is the amount of heat required to evaporate a liquid.
Learn more about vaporization here;
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Why is co2 so bad for our bodies and why do we need to remove it? In the context of protons and ions acid/base solution.
What kinds of matter have thermal energy
Answer:
Thermal energy comes from heat sources that provide energy from it's temp.
Explanation:
Produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy. 6 min, 47 sec Heat Energy.
(If this doesn't help let me know in the comments, I'll try to explain better :> )
Question
In Woodward's 1952 synthesis of cholesterol, an elimination reaction was used to remove the C20 alcohol
substituent as shown below. The transformation is performed with acetic acid (hint: as opposed to a strong
base). Would you classify this as an E1 or E2 elimination?
Ola.E2
O b, E1
6. How many sections are there to an SDS for a given chemical? *
(2 Points)
N.
8
10
14
16
Particle size directly affects which of the following spil properties?
Answer:
The size of soil particles is important. The amount of open space between the particles influences how easily water moves through a soil and how much water the soil will hold. Too much clay, in proportion to silt and sand, causes a soil to take in water very slowly. Such a soil gives up its water to plants slowly.
elements have similar characteristics?
Periodic TaBle
oF The Elements
Answer:
See attachment.
Explanation:
Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.
On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.
Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.
How many grams of iron can be extracted from 1.55 kg of iron(III) carbonate?
What is the mass of 2.9 moles of calcium? Show all work!
Answer:
the mass of 2.9 moles of calcium is 116 g
Explanation:
The computation of the mass of 2.9 moles of calcium is shown below
As we know that
Mole = mass ÷ molar mass
where,
Moles be 2.9
And, we know that the molar mass of calcium be 40g/mol
Now put the values to the above formula
2.9 = Mass ÷ 40
So, the mass would be
= 40 × 2.9
= 116 g
Hence, the mass of 2.9 moles of calcium is 116 g
How many moles of phosphorus are in a sample of 40.4 grams of phosphorus I NEED HELP FAST
Answer:
1.30 mol P
Explanation:
take what is given to you (40.4g). now divide it by the molar mass of the asked element (phosphorus = 30.97g/mol)
40.4g P / 30.97g/mol P = 1.30 mol P
hope this helps :)
Suppose you are provided with a 36.89 g sample of potassium chlorate to perform this experiment. What is the mass of oxygen you expect
to release upon heating?
Answer:
14.45 g of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2KClO₃ —> 2KCl + 3O₂
Next, we shall determine the mass of KClO₃ that decomposed and the mass of O₂ produced from the balanced equation. This can be obtained as follow:
Molar mass of KClO₃ = 39 + 35.5 + (16×3)
= 39 + 35.5 + 48
= 122.5 g/mol
Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g
Molar mass of O₂ = 2 ×16 = 32 g/mol
Mass of O₂ from the balanced equation = 3 × 32 = 96 g
SUMMARY:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Finally, we shall determine the mass of O₂ produced by heating 36.89 g of KClO₃. This can be obtained as follow:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Therefore, 36.89 g of KClO₃ will decompose to produce =
(36.89 × 96)/245 = 14.45 g of O₂
Thus, 14.45 g of O₂ were obtained from the reaction.
PLZ HELP NEED HELP ASAP
Answer:
The third answer choice.
Bronze is a(n)
A. Alloy
B. Pure substance.
C. Element.
D. Compound.
Answer:....
Explanation:...
Which Sphere does condensation occur.
Answer:
The atmosphere, I believe.
Explanation:
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
Hope this helps!
How does a jacket keep you warm?
Answer:
Your body releases heat. Your jacket helps your body preserve that heat by shielding the heat from going out in the cold.
In order to predict the outcome of the reaction, write the molecular, full ionic, and net ionic equations for a mixture of aqueous ammonia (NH3) and silver nitrate (AgNO3) in which a diammonia silver complex ion is produced. Molecular: Full ionic: Net ionic: Predict your observations based on above molecular equation: Actual observations:
Answer:
See explanation
Explanation:
Full molecular equation;
2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)
Full ionic equation
2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)
Net ionic equation;
2NH3(aq) + Ag^+(aq) --------> [Ag(NH3)2]^+(aq)
When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.
Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
Which statement best explains how weather is related to the water
cycle?
Answer:
Increased evaporationof water vapour from sea or land will increase rainfall
Answer:
Explanation:
increased evaporation of water vapor from sea to land will increase rainfall
.
In an investigation, the volume of a material is measured
as 80.0 cm3 and its mass is measured as 253 g. Which
calculation of density correctly uses the precision rules:
3.1625 g/cm3, 3.163 g/cm3, 3.16 g/cm3, 3.2 g/cm3, or 3
g/cm3?
Answer:
3.2 g/cm3
Explanation:
Mass = 253 g
Volume = 80.0 cm3
Density = Mass / Volume = 253 g / 80.0 cm3
Density = 3.1625 g/cm3
The precision rule means the answer must not have more significant values than the value with the least number of significant figures. In this case, the value with the least number of significant figures is 80.0 with two signiificant figures. Hence;
Answer = 3.2 g/cm3
ASAP!!
Identify the limiting reactant when 6 moles of CaCl2 is combined with 6 moles of Al2O3.
Reaction: 3CaCI2 + Al2O3 -> 3CaO + 2AlCI3
Answer:
just downloud smart
Explanation:
thank me later
Is this statement true or false?
Living things are classified by shared characteristics.
Answer:
True!
Explanation:
Living things are classified by the characteristics they have in common. All living organisms are classified within the organization based on extremely fundamental, shared characteristics.
