Answer:
Double replacement reaction
Explanation:
This is what is known as a double replacement reaction. The two parts of each molecule separate and recombine to form two new compounds. For instance, [tex]Al_2(SiO_3)_3[/tex] separates into [tex]Al_2[/tex] and [tex](SiO_3)_3[/tex], while [tex]NaOH[/tex] separates into [tex]Na[/tex] and [tex]OH[/tex], and then they recombine with the other compound.
Hope this helps!
Answer:
double replacment reaction
Explanation:
srry if it is wrong
give chemical tests to distinguish between saturated and unsaturated compound
bromine is used to distinguish between saturated and unsaturated compounds. when bromine water is added to the unsaturated compound, bromine that added to the unsaturated compound and the red brown colour of bromine water is discharged.
Consider the equation below. CaCO3(S) CaO(S) + CO2(g) What is the equilibrium constant expression for the given reaction?
Answer:
Option B. Keq = [CO2] [CaO]/ [CaCO3]
Explanation:
The balanced equation for the reaction is given below:
CaCO3(s) —> CaO(s) + CO2(g)
The expression for the equilibrium constant, Keq is simply the ratio of the concentration of the products to that of the reactants.
The expression for the equilibrium constant, Keq is given below:
Keq = [CO2] [CaO] / [CaCO3]
Answer: c) Keq= [co2]
Explanation:
edge 2023
Another name for a statovolcano is a _____ volcano because it is made of alternating layers of thick, sticky lava and volcanic rock and ash. A. shield B. cinder C. composite D. pyroclastic
Answer:
Bcinder
Explanation:
URGENT!!!!
An ordered list of chemical substances is shown.
Which substances in the list can be some of the reactants and products in the same combustion reaction? (4 points)
Select one:
a. 1, 2, and 3
b. 2, 3, and 6
c. 1, 4, and 5
d. 1, 2, and 5
Answer : The correct option is (b) 2, 3, and 6
Explanation :
Combustion reactions: It is defined as the reactions in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water.
A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.
The general chemical equation for the combustion is as follows:
[tex]C_xH_yO_z+O_2\rightarrow CO_2+H_2O[/tex]
where, 'x', 'y' and 'z' are the subscripts of Carbon, hydrogen and oxygen respectively.
The reactants and products in the same combustion reaction are [tex]O_2[/tex] and [tex]CO_2,H_2O[/tex] respectively.
Hence, the correct option is (b) 2, 3, and 6
Another chemistry question. Help me!
To prepare 250cm³ of standard solution of 1.0 mol dm-³ sodim carbonate Na2Co3
Answer:
Molar mass Na2CO3 = 2*23 + 12 + 3*16 = 106 g/ mol
Mass of 1 mol Na2CO3 = 106 g
mass (Na2CO3) = 106g*250cm³/1000cm³ = 26.5 g
1) It is necessary because all Na2CO3 will be in the solution, and no Na2CO3 would be lost.
2) Because the solution that was formed after rinsing beaker contains Na2CO3.
3) Eyes should be on the level of calibration mark of the volumetric flask.
4) It is necessary to prevent evaporation of water, and changing , because of it, the concentration of the solution.
Using the periodic table, complete the table to describe each atom. Type in your answers. A B C D E F
Answer:
e
Explanation:
Answer:
A 20
B 40
C Ca
D 10
E 9
F F
Explanation:
Which of the following best describes why a cruise ship floats?
A. It displaces an equal or greater amount of water than its own
weight.
B. It displaces more than half of its weight in water.
C. Its volume and mass are equal.
D. Its volume is greater than its mass.
Answer:
A. It displaces an equal or greater amount of water than its own weight.
Explanation:
Jaiden is writing a report about the structure of the atom. In her report, she says that the atom has three main parts and two subatomic particles. Do you agree with her? Why or why not?
Answer:
The smallest constituent of an element is termed as an atom. According to Jaiden, an atom comprises two subatomic particles and three prime parts, however, this is incorrect as an atom comprises three subatomic particles and two main parts. The three subatomic particles are the protons, electrons, and neutrons. All these parts are smaller in comparison to an atom, thus, they are considered as subatomic particles.
To be considered as an atom, an atom is needed only electrons and neutrons, like hydrogen exhibit one electron and one proton. On the other hand, the overall charge of the atom is not affected by the presence of neutrons, it is the subatomic particle that only enhances the mass of the atom.
Answer:
I disagree with her because an atom has two main parts: the nucleus and the electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons.
Explanation:
Name two drying agents that can be use to dry hydrogen gas
How many grams of H2S is needed to produce 18.00g of PbS if the H2S is reacted with an
excess (unlimited) supply of Pb(CH3COO)2?
Answer:
2.56 grams of H₂S is needed to produce 18.00g of PbS if the H2S is reacted with an excess (unlimited) supply of Pb(CH₃COO)₂
Explanation:
The balanced reaction is:
Pb(CH₃COO)₂ + H₂S → 2 CH₃COOH + PbS
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) they react and produce:
Pb(CH₃COO)₂: 1 moleH₂S: 1 moleCH₃COOH: 2 molesPbS: 1 moleIn this case, to know how many grams of H₂S are needed to produce 18.00 g of PbS, it is first necessary to know the molar mass of the compounds H₂S and PbS and then to know how much it reacts by stoichiometry. Being:
H: 1 g/moleS: 32 g/molePb: 207 g/moleThe molar mass of the compounds are:
H₂S: 2* 1 g/mole + 32 g/mole= 34 g/molePbS: 207 g/mole + 32 g/mole= 239 g/moleSo, by stoichiometry they react and are produced:
H₂S: 1 mole* 34 g/mole= 34 gPbS: 1 mole* 239 g/mole= 239 gThen the following rule of three can be applied: if 239 grams of PbS are produced by stoichiometry from 34 grams of H₂S, 18 grams of PbS from how much mass of H₂S is produced?
[tex]mass of H_{2} S=\frac{18 grams of PbS*34 grams of H_{2}S }{239 grams of PbS}[/tex]
mass of H₂S= 2.56 grams
2.56 grams of H₂S is needed to produce 18.00g of PbS if the H2S is reacted with an excess (unlimited) supply of Pb(CH₃COO)₂
Unit Test
Active
TIME REMAINING
1
2
01:55:24
Which statement best describes the direction of heat flow by conduction between two samples of the same material?
Heat flows from faster molecules to slower molecules when they are near.
Heat flows from faster molecules to slower molecules when they collide.
Heat flows from slower molecules to faster molecules when they are near.
Heat flows from slower molecules to faster molecules when they collide.
Answer:
b
Explanation:
edge 2021
According to the concept of conduction,heat flows from faster molecules to slower molecules when they collide.
Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules .
There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
Heat is transferred from faster to slower molecules when they collide , thus the correct option is that heat flows from faster molecules to slower molecules when they collide.
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PLS HELP ! 5.00 mL of a stock solution, containing 0.200 M of Na3PO4 was pipetted into a 25.00 mL volumetric flask and made up to the calibration mark with deionised water. A serial dilution was carried out for another two times to obtain the final solution of desired concentration. Calculate the concentration of the final solution, express in ppm (by volume).
Answer:
262 ppm of Na₃PO₄
Explanation:
In a dilution, the concentration of the initial solution is decreased. When you take 5.00mL of the solution that is diluted to 25.0mL The solution is diluted 25/5 = 5 times
If you make another two serial dilutions the final solution wil decrease its concentration 5*5*5 = 125 times
As original solution containing 0.200 M of Na3PO4, the final solution will have a concentration of:
0.200M / 125 = 1.6x10⁻³M
Molarity is defined as the ratio between moles and liters. 1.6x10⁻³ moles of Na3PO4 in 1L are:
1.6x10⁻³mol ₓ (164g/mol) = 0.262g Na₃PO₄ / L
Assuming density of Na3PO4 as 1g/mL the concentration of the solution is:
0.262mL Na₃PO₄ / L
As 1mL = 1000μL:
262μL Na₃PO₄ / L
μL of solute per L of solution is equal to ppm, that means the solution has:
262 ppm of Na₃PO₄How many neutrons are in one atom of the elemen, F-19?
Answer:
10
Explanation:
Answer: 10 neutrons
This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.
Explanation:
Can Chlorine be harmful to any of the earth’s ecosystems? If so how?
Answer:
Although chlorine itself usually does not cause environmental harm, it combines rapidly to form chemicals such as dioxins that pollute water, contaminate fish and transfer to humans and larger animals that eat the fish.
Explanation:
What does "A" represent in a the standard form of a double replacement reaction? a.) otion b.) cation
Answer: cation
Explanation:
"A" represent in a cation in the standard form of a double replacement reaction. Therefore, option B is correct.
What is cation ?Positively charged ions are known as cations. Negatively charged ions are known as anions. Ions are positively or negatively charged atoms or molecules. A balanced atom will become a positively charged cation if one or more electrons are lost.
In an electrical field, these ions are known as "cations" because they are positively charged and migrate toward the negative electrode (cathode).
The double-replacement reaction generally take up the form of AB + CD → AD + CB where A and C are positively-charged cations and B and D are negatively-charged anions.
Thus, option B is correct.
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2 Points
A student blows a whistle. In which direction do the air particles vibrate with
respect to the direction the sound wave travels?
A. Perpendicular to
B. Parallel to
C. At a 45 degree angel to
D. At an unpredictable angel
Answer:
parallel to
Explanation:
In parallel direction the air particles vibrate with respect to the direction the sound wave travels. The correct option is B.
What is sound wave?A sound wave is the pattern of disturbance caused by the movement of energy as it propagates away from the source of the sound through a medium (such as air, water, or any other liquid or solid matter).
Sound waves are produced by object vibrations and pressure waves, such as a ringing cellphone.
Because sound waves are produced by compressions and rarefactions in the air, they are referred to as longitudinal waves. The air particles vibrate in a direction parallel to the propagation direction.
The particles in a longitudinal wave are displaced parallel to the direction of the wave. Compressions moving along a slinky are an example of longitudinal waves.
Air particles vibrate in a parallel direction to the direction of travel of the sound wave.
Thus, the correct option is B.
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Which particle has no charge
Answer:
Neutron
Explanation:
Consider the reaction below.
Zn(s) + Cu2+ (aq)--->Zn2+ (aq) + Cu(s)
Which half reaction correctly describes the oxidation that is taking place?
A)Zn(s)--->Zn2+ (aq) +e
B)Zn(s)--->Zn2+ (aq) + 2e-
C)Cu2+ (aq) + 2e--->Cu(s)
D)Cu2+ (aq)e Cuis)
Answer:
B
Explanation:
Oxidation
Zn---> Zn2+ 2e
Reduction
Cu2+ + 2e ---->Cu
Which phrase describes the prime meridian
Answer:
It is a metaphorical line that divides the earth from north to south
Explanation:
Question 4 (higher question)
Electrolysis of acidified water can produce hydrogen and oxygen.
The apparatus for the electrolysis is:
. water containing some dilute sulfuric acid
• two graphite rods
• a suitable container for the electrolysis reaction
. a suitable source of electricity
• test tubes
Describe how to use the apparatus to electrolyse acidified water, and how to test the gases to
show that they are hydrogen and oxygen. Include a diagram in your answer. [6 marks]
Answer:
Explanation:
Describe means you should recall facts, events or processes accurately. You might need to give an account of what something looked like, or what happened.
Explain means you need to make something clear, or state the reasons for something happening.
Compare means you need to describe similarities and differences between things. If you are asked to compare X and Y, write down something about X and something about Y, and give a comparison. Do not just write about X only or Y only.
Evaluate means you must use information supplied, or your own knowledge, to consider the evidence for and against or to identify strengths and weaknesses. You must then complete your answer with a conclusion, stating which is better and why, for example.
84. A salution of a substance x is used
of a
for
il Name the sulsstance 'x' and the
white kashing
write its farmula
il y Write the reaction the substance
la' named in il above with water.
of
dne
Answer:
Following are the answer to this question:
Explanation:
(1) Calcium oxide (CaO) is also referred to as quicklime. It is the solution for the substance used for whitewashing.
Whenever it reacts with water ([tex]H_2O[/tex]) and absorbs carbon dioxide ([tex]CO_2[/tex]), it then formed calcium carbonate ([tex]CaCO_3[/tex]), which produced a hard laminate on the walls, to first be whitened by the production of calcium hydroxide (CaOH).
(2) Slackened lime or calcium hydroxide arises whenever the fast limestone reacts with water.
[tex]CaO(s) + H_2O(l) \rightarrow Ca(OH)_2(aq).[/tex]
What is the dependent variable for "how does changing your laundry detergent affect how clean your clothes are?"
Dependent variables receive this name because, in an experiment, their values are studied under the supposition. The dependent variable is the cleanliness of the clothes.
What is the dependent variable ?It is something on which other elements depend. A test score, for instance, may be a dependent variable because it could vary based on a number of variables, including how much you studied, how much sleep you got the night before the test, and even how hungry you were.
A dependent variable is one that is altered as a result of the modification of an independent variable. Your independent variable "depends" on the outcome you're interested in measuring. Dependent variables are also referred to as: response elements (they respond to a change in another variable)
There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables.
Thus,The dependent variable is the cleanliness of the clothes.
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Cu+2AgNO
3
→2Ag+Cu(NO
3
)
2
start text, C, u, end text, plus, 2, start text, A, g, N, O, end text, start subscript, 3, end subscript, right arrow, 2, start text, A, g, end text, plus, start text, C, u, left parenthesis, N, O, end text, start subscript, 3, end subscript, start text, right parenthesis, end text, start subscript, 2, end subscript
How many grams of \text{Ag}Agstart text, A, g, end text will be produced from 19.0 \text{ g}19.0 g19, point, 0, start text, space, g, end text of \text{Cu}Custart text, C, u, end text and 125 \text{ g}125 g125, start text, space, g, end text of \text{AgNO}_3AgNO
3
start text, A, g, N, O, end text, start subscript, 3, end subscript?
Answer:
Mass of Ag produced = 64.6 g
Note: the question is, how many grams of Ag is produced from 19.0 g of Cu and 125 g of AgNO3
Explanation:
Equation of the reaction:
Cu + 2AgNO3 ---> 2Ag + Cu(NO3)2
From the equation above, 1 mole of Cu reacts with 2 moles of AgNO3 to produce 2 moles of Ag and 1 mole of Cu(NO3)2.
Molar mass of the reactants and products are; Cu = 63.5 g/mol, Ag = 108 g/mol, AgNO3 = 170 g/mol, Cu(NO3)2 = 187.5 g/mol
To determine, the limiting reactant;
63.5 g of Cu reacts with 170 * 2 g of AgNO3,
19 g of Cu will react with (340 * 19)/63.5 g of AgNO3 =101.7 g of AgNO3.
Since there are 125 g of AgNO3 available for reaction, it is in excess and Cu is the limiting reactant.
63.5 g of Cu reacts to produce 108 * 2 g of Ag,
19 g of Cu will react to produce (216 * 19)/63.5 g of Ag = 64.6 g of Ag.
Therefore mass of Ag produced = 64.6g
Determine the pH of 0.150 M magnesium hydroxide solution
so ...this is the question and I hope you get it right one
Answer:
About 96 grams per mole
Explanation:
The chemical formula of ammonium carbonate is [tex](NH_4)_2CO_3[/tex]. This means that breakdown of moles of atom per mole of molecule is:
2 moles of nitrogen, with a molar mass of around 14
8 moles of hydrogen, with a molar mass of around 1
1 mole of carbon, with a molar mass of about 12
3 moles of oxygen, with a molar mass of about 16
The molar mass of ammonium carbonate is therefore:
2(14)+8(1)+1(12)+3(16)=28+8+12+48=about 96
Hope this helps!
whats the chemical formula for dilute hydroxide acid
PLEASE HURRRYYYY
A buffer is made using HCO2Na. Which other substance should the buffer contain?
HCO2Li
HCO2H
NaNO3
HCl
Answer:
HCO₂H
Explanation:
A buffer is defined as the mixture between a weak acid and its conjugate base, or vice versa, in an aqueous solution.
The HCO₂Na (Sodium formate), is the conjugate base of formic acid, HCO₂H, a weak acid of pKa = 3.75.
Thus, to make a buffer using HCO₂Na, the other substance the buffer should contain is HCO₂H
Answer:
HCO₂H
Explanation:
Which element is needed for
a. Bone and teeth formation.
b. Treatment of water.
Answer:
a.calcium
b.chlorine
5. What volume would you need to dilute 0.2 L of a 15 M solution to obtain a 3 M
solution?
Answer:
IL
Explanation:
M_1 V_1 = M_2 V_2
M_1 = 15 M
V_1 = 0.2 L
M_2 = 3 M
V_2 = ?
15 x 0.2 = 3V_2
15 x 0.2 = 3
3 / 3V_2
1 L= V_2
1 L is the volume that would be needed to dilute 0.2 L of a 15 M solution to obtain a 3 M solution.
What is volume?A measurement of three-dimensional space is volume. It is frequently expressed quantitatively in SI-derived units, other imperial units, or US customary units. Volume and the notion of length are connected. In contrast to how much space the container actually occupies, the overall size of a container is typically thought of as its capacity, or the quantity of fluid it could hold.
Volume was initially measured using naturally occurring vessels of a comparable shape and then with standardised containers. Arithmetic formulas can be used to quickly calculate the volume of several straightforward three-dimensional shapes.
Molarity₁×Volume₁=Molarity₂×Volume₂
15 x 0.2 = 3×Volume₂
15 x 0.2 = 3
3 / 3=Volume₂
1 L=Volume₂
Therefore, 1 L is the volume that would be needed to dilute 0.2 L of a 15 M solution to obtain a 3 M solution.
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Molar mass if calcium nitrate
Answer:
About 164 grams
Explanation:
The molecular formula of calcium nitrate is [tex]Ca(NO_3)_2[/tex]. The molar mass of calcium is about 40, while the molar mass of nitrogen is about 14 and oxygen is about 16. Therefore, the molar mass of it is:
[tex]40+2(14+3(16))=40+2(14+48)=40+124=164[/tex]
Hope this helps!