Answer:
A. Pb(OH)2 + 2HCl → 2H2O + PbCl2
Explanation:
In a balanced reaction, the amount of different atoms in the products must be equal to number of atoms in reactants. With the equations of the problem:
A. Pb(OH)2 + 2HCl → 2H2O + PbCl2
There is 1 atom of Pb in reactants and products.
2 atoms of O in both sides.
4 atoms of H
And 2 atoms of Cl
That means this reaction is balanced
B. 2Pb(OH)2 + HCl → H2O + 2PbCl2
2 atoms of Pb
4 atoms of O in reactants but just 1 in products.
As the amount of oxygen is not equal for reactants and products we can say the reaction is unbalanced.
And right choice is A.
.apclassroom college board org / . OollegeBeard AP Classroom Unit 3 FRO Test d. Based on concepts of atomic structure and periodicity, propose a modification form between halogens and fluorine B a. CIF a T-shaped structure is asymmetric with dipoles that do not cancel out but produce
a. The atomic size of fluorine is very small compared to other halogens. Similarly, fluorine is the highest electronegative atom in periodic table. b. CIF a T-shaped structure is asymmetric with dipoles that do not cancel out but produce a net dipole.
What is dipole moment ?In a compound with atoms of significant difference in electronegativities, the shared pair of electrons attracts towards the more electronegative atom and this results in a charge separation. The measure of the separation of two electrical charges is called the dipole moment of the compound.
a. Fluorine is the most electronegative atom in periodic table. Compared to other halogens, F has very small atom and have less electron affinity compared to other halogens.
b. Cl - F is an interhalogen compound in which dipole moment is created by the electronegativity difference between Cl and F. The net dipole moment is towards the F atom.
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In the formula Depth= V(T/2), why is the T (time) divided by 2?
The time taken is 2x the depth of the sea
Further explanationLinear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
An equation of constant velocity motion
[tex]\large {\boxed {\bold {x = v \times \: t}}}[/tex]
x = distance = m
v = speed = m / s
t = time = seconds
The principle used in measuring depth is to use the reflection of sound waves emitted by the instrument towards the bottom of the sea. The sound will be reflected and received back by the instrument. So that the time taken is 2x the depth of the sea (emitted time + reflected time), so that the calculation of the depth distance must be divided by 2
Which of the following could be an appropriate citation for an article with 3 authors?
A. Jones, Davis, and Young, 2012
B. Davis, 2012
C. Jones, D and Y, 2012
D. Jones, et al., 2012
Answer:D
Explanation: if you have more than 2 authors , you cite the article by using the last name of the author followed by the phrase “et al”
APA- style citation is a writing format to mention and cite the sources in the journals and papers. Citation for an article with 3 authors is given as, Jones, et al., 2012. Thus, option D is correct.
What is APA- style citation?APA- style citation is the format given by the American Psychological Association. It is a citation style that quotes the author's last name and date. The data quoted are enclosed in parentheses. For example, (Robert, 1997)
Unlike MLA, the APA citation style capitalizes only the titles and proper nouns. The tiles in the source are written in italics. The in-text and the reference list of the citation differ a little.
When a source contains three authors then, the APA citation style writes the last name of the author followed by the et al., and the year like Jones, et al., 2012.
Therefore, option D. Jones, et al., 2012 is the correct APA citation style.
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- properly balance this equation?
AgNO3 + H2S Ag2S+ HNO3
Answer:
2AgNO3 + H2S => Ag2S + 2HNO3
Explanation:
A light emitting diode (LED) glows when an electric current moves in one direction but not the other. What type of material is LED
A).conductor
B).insulator
C).semiconductor
D).capacitor
Answer:semiconductor
Explanation:a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.
Help fast this is my last question I have to do
05. Select True or False for each.
The absolute location can be identified using the geographic coordinate system.
Lines of longitude run parallel to the Equator.
The Prime Meridian is located at an equal distance from the North Pole and the South Pole.
Jupiter and Pluto are gas giants.
Earth's core is a massive sphere of burning gases that gives off energy.
The tilt of Earth's axis is important to changes in climate on the sun's surface.
Answer:
True
Explanation:
Lucas and Will are in an arm wrestling match. Lucas is pushing with a force of 55 Newtons. Will is pushing with a force of 62 Newtons. Who would win the arm wrestling match? Explain why. Use at least 3 complete sentences using vocabulary and examples from the lessons:
Answer:
This question is incomplete.
Explanation:
However, Will should win the match if other conditions are the same between the two of them. This is because Will is pushing with a higher force (of 62 Newtons). This is because the higher the force, the higher the workdone. The formula associated to the workdone here is
Workdone = Force × distance
is salt (NaCl) a base or a salt?
Answer:NaCl is a salt.
Explanation:
Answer:
It is salt
Explanation:
Wetlands are low laying lands that are constantly wet. What most occur for wetlands to be drained.
A. Wetlands cannot be drained.
B. Water must be removed from from the surface of the lands until it is dry.
C. Surface water in the wetlands must be routed below ground.
D. Groundwater must be removed in sufficient quantities to drop the water table.
Answer:
I think it's choice C because if we route it below the ground the surface will remain dry wild underground will be wet which will be good for soil and its fertility I think that's the answer
Which change of state is shown in the model?
condensation
deposition
sublimation
evaporation
Answer:
what model
Explanation:
ill answer if u have model
What are two units that are used to measure volume in chemistry?
Answer:
The mass of water is expressed in grams (g) or kilograms (kg), and the volume is measured in liters (L), cubic centimeters (cm3), or milliliters (mL). Density is calculated by the dividing the mass by the volume, so that density is measured as units of mass/volume, often g/mL.
A man is making a metallic gate for their new house. What will the man do in order for his gate to prevent rusting?
Answer:
to prevent rust the man should oil his get or use lubricants to lubricate it
Which of the following is the correct equation for calculating SPEED?
Answer:
Where is the following?
Explanation:
The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in meters (m) and time is in seconds (s), so the units will be in meters per second (m/s).
Answer:
Speed = Distance / Time
Explanation:
Distance = Speed * Time
Time = Distance / Speed
Use this chart to help you remember. Cover what you don't have. If it is next to each other, multiply. If one is on top, divide what is on top with the one on the bottom.
Which has a larger ionic radius than it's neutral atom?
Chlorine
Aluminum
Sodium
Magnesium
Answer:
sodium??
Explanation:
Which elements are least easily identified? Explain-
Answer:
hydrogen
oxygen
hydrogen is easily identified by a any liqiud substance
hydrogen=liquid
oxygen is also easily identified by air
oxygen=air
Plz help!
Sodium and Iodine combine to form an ionic compound. Sodium contains 1 valence electron and iodine has 7. Which is going to be the one to lose an electron and which will gain an electron to form ions and create the bond?
Answer: Ionic compounds/bonds don’t lose electrons. They transfer electrons
Explanation: Sodium is going to get the +7 charge and Iodine will not need to have a charge beside it. Your formula should look like this Na7I
What is the difference between a single atom and a molecule?
Answer:
Atoms are single neutral particles.
Molecules are neutral particles made of two or more atoms bonded together.
Answer:
a molecule is made up of atoms bonded together so while an atom is its own separate entity a molecule is what you get when those atoms bond together. these might be the same elements such as two oxygen Atoms bonded together (O2), or it might be different Atoms bonded together like water(H20)
Everything that you can touch and feel is made up of
Answer:
matter/mass is made up of anything you see touch and fell
why do scientists look for patterns in the world
Answer:
So if they find something that looks illogical they can find thing that are loggical and see if there just put together
Explanation:
Water is formed when 48g of oxygen combine with 6g of hydrogen. What mass of oxygen combines with 2g of hydrogen?
A. 12g
B. 16g
C. 96g
D. 144g
Answer:
B. 16g
Explanation:
How does the periodic table help to determine the number of valence electrons for an element?
Answer:
valence electrons are determine by the numbers at the top of the grop so group 1 has 1 valence electron, group 2 has 2 valence electrons, groups 3-12 have no valence electrons, group 13 has 3 valence electrons, group 14 has 4 valence electrons, group 15 has 5 valence electrons, group 16 has 6 valence electrons, group 17 has 7 valence electrons and group 18 has 8 valence electrons exept helium. helium has 2 valence electrons.
Explanation:
Will give brainliest please give me the Lewis model of Magnesium sulfide
Answer:
The Lewis dot structure for Magnesium is an Mg with 2 dots which stand for its two valence electrons. The Lewis dot structure for Sulfur is an S with 6 dots which stand for its six valence electrons. ... The Magnesium atom has a +2 charge and the Sulfur atom has a -2 charge.
Explanation:
Calculate the molality of a saline solution in which 50.0 g of NaCl is dissolved in 0.750 kg of water.
Answer: Molality of a saline solution = 1.14 moles per kg
Explanation:
Given mass of NaCl (m)= 50.0 g
Mass of solvent = 0.750 kg
Molar mass of NaCl (M)= 23 g + 35.5 g = 58.5g [Atomic mass of Na = 23 u , atomic mass of Cl = 35.5 u]
Number of moles (n) =[tex]\dfrac{m}{M}[/tex]
[tex]\dfrac{50}{58.5}=.8547[/tex]
Molality = [tex]\dfrac{\text{Number of moles }}{\text{Mass of solvent in kg}}[/tex]
[tex]=\dfrac{0.8547}{0.750}=1.1396\approx1.14\text{ moles per kg][/tex]
Hence, molality of a saline solution = 1.14 moles per kg
Which of the following is an example of
positive feedback?
A Regulation of blood glucose levels
B Regulation of body temperature
C Contractions in childbirth
Answer:
Regulation of body temperature
Explanation:
Which science is the study of living organisms?
PLES NEED HELP asap
chemistry
physics
biology
astronomy
Answer:
Biology
Explanation:
Answer:biology
Explanation:
Identify two life functions involved in meeting the energy demands of a cell or an organism.
Answer:
digestion and respiration
Answer:
I think the answer is: Cell
Explanation:
im not sure but i think its cell
what is dilution law
Answer:
Please Mark as Brainliest!!!!!!!
Explanation:
Answer is in the below image
Should the characteristics of life be redefined? Why and why not
Answer:
Ok audry vamos a esto,Si eso pasa,Los viruses dejaran de infectar o será peor? Si se redefina las características de la vida,Nos adaptarianos rapido?Que ganamos con cambiar eso? porque se debe de cambiar?
Ok audry let's get to this, if that happens, will the viruses stop infecting or will it be worse? If we redefine the characteristics of life, we adapt quickly? What do we gain by changing that? why should it be changed?
Explanation:
esas son las preguntas que tienes que hacer a ver si hace sentido el cambio que quieren hacer porque de que vale hacer un cambio sin saber si nos va a beneficiar o no O si eso va a resolver el conflicto. (is me lorenny XD )
Those are the questions that you have to ask to see if the change they want to make makes sense because of what is worth making a change without knowing if it will benefit us or not or if it will resolve the conflict. (is me lorenny XD)
What is figurative language?
A. language used in a manner that is light and whimsical
B. language used in a manner that implies another, less literal meaning
C. language used in a manner that provides context clues
D. language used in a manner that is direct and straightforward
Answer:
B
Explanation:
literal means actual
The language used in a manner that implies another, less literal meaning is figurative language. Option B is correct.
What is figurative language?Figurative language is a type of language which is written in words and paragraphs which are meaningful and readable but not true or right or litrally true just use for giving examples.
Some examples are love is a battlefield or I am going through a rollercoaster of emotions etc. basically comparison of real-life situations to fictional thoughts or not literally true.
Therefore, option B is correct. The language used in a manner that implies another, less literal meaning is figurative language.
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