answer: c
because if you really picture it and look at each of them carefully it is c
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1.How many significant figures are present in the following measurements? solve these
a. 52.10 mL
b. 6.07∙10100 atoms
c. 300 km
2.List the number of protons, neutrons, and electrons present in a Mg atom.
3.Draw a Bohr diagram for an atom of Mg.
4.Calculate the number of moles in 162.32 g of CuCl2
Answer: As we all are aware that life on Earth is existed due to several environmental changes and there are several scientific factors of sustainability that support the survival and evolution of life on Earth.
Scientific factors of sustainability include solar energy, chemical cycle, and biodiversity that supported life on Earth. solar energy helps all organism and especially producers to gain energy and store the energy which further used in chemical cycles of transferring energy to other trophic levels.
Chemical cycle also involves the interaction of biotic and abiotic envrionment with each other that leads to environmental changes as well as organisms adapt themselves accordingly.
Biodiversity maintains the balance in the ecosystem and prevent dominancy of one organism otherwise it can lead to scarcity and organism would not be able to survive. Variation in biodiversity due to random mating in the same species leads to evolution and produces new species of organisms.
Hence, scientific factors of sustainability play major role in survival and evolution of life on the Earth.
Explanation: Is this what you need
Make up your own story using as many elements as you can. Rather than writing the name of the element in your story, use its chemical symbol.
Answer:
Once upon a time, H2O was falling down majestically into the river below the large, strong mountains filled with Ti while a little Au hunter walked to search another long day for his hopeful treasures.
Explanation:
Hope this helps, I don't know how long it's supposed to be soooo, yeah
Which of the following is an example of a chemical property?
a. color
b. density
c. phase
d. the ability to rust
4.
How does a positive ion form?
Answer: Metal atoms lose electrons from their outer shell when they form ions: the ions formed are positive, because they have more protons than electrons.
True or false? During a change of state the temperature of the substance does not change.
Answer:
false
Explanation:
the temperature of a substance can not remain constant as the substance changes from solid to liquid then finllay from liquid to gas. This is so because as a solid is heated it changes state and once it rechanges it boiling point it changes to gas or vapour.
Classifying Characteristics of Rocks
Answer:
The texture of a rock is a result of its mineral composition
Most rocks contain more than one type of sediment
Explanation:
Plastic is used to cover the copper wire in the power codes of appliances because plastic differs from copper in _________. 1. Destiny 2. Hardness. 3. Phrase at room temperature 4. Electrical conductivity
Answer:
Bro, its so obvious. Its electrical conductivity.
Explanation:
Plastic is an insulator thus it can protect conducting material from shortage of current as well for the safety of users. Thus, option 4 is correct.
What is conductivity ?Conductivity of a material is the measure of its ability to pass electric current through it. Based on this there are three types of materials namely conductors, insulators and semiconductors.
Conductors are materials highly conducting at room temperature. Semiconductors are not conducting at room temperature but can be conducting at higher temperatures.
Insulators does not conduct electricity at any situation. Hence, insulators are used to coat conducting wires and to protect from electric shock. Plastic s an insulator which can cover conducting copper wire for safety. Thus, option 4 is correct.
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This equation represents an unbalanced chemical reaction:
Nal + Cl2 → NaCl + 12
When the equation is balanced, which coefficient should be placed before NaCl?
Answer:
C=2
Explanation:
It would end as 2 NaI+1Cl2=2NaCl +1I2
GIVE REASON:-
Ammeter is connected in series and voltmeter is connected in parallel to the electric load in an electric circuit .
Answer:
An ammeter is a device that is used to measures the amount of current flowing in a circuit and a voltmeter measure electric potential difference in an electric circuit between two points.
An Ammeter is connected in series because of its low resistance capacity and it will be connected in parallel it can get damaged due to high current. A voltmeter is connected in parallel in an electric circuit because the potential difference remains the same when connected in parallel.
If C6H6 was the molecular formula, what is the empirical formula?
Answer:
so the empirical formula for benzene is also CH.
Explanation:
What’s the molecule for Snl2 formula?
Answer:
Tin(II) iodide, also known as stannous iodide, is an ionic tin salt of iodine with the formula SnI2. It has a formula weight of 372.519 g/mol.
Explanation:
the moleque
Why is Argon (Ar} in group 18, period 3 on the periodic table ?
A.
B.
C.
D.
Answer:
B
Explanation:
All elements on group 18 are noble gases, which noble gases are in fact actually not highly reactive due to the large amount of valence electrons located on the out shell.
What type of chemical reaction is: CH4 + 202® CO2 + 2 H2O
Answer:
Incomplete combustion - carbon monoxide and water.
Explanation:
Which of the following is an example of heat being transferred from one object to another without direct contact?
A.
Caleb burned himself by taking a shower in water that was too hot.
B.
Caleb burned himself by spilling a hot drink on his hand.
C.
Caleb burned himself by holding his hand too close to a fire for too long.
D.
Caleb burned himself by touching the end of a poker that was sitting in a fire.
New Zealand is one of the most geologically active places on Earth. Earthquakes, volcanoes, and geysers commonly occur throughout the region. What most likely causes these events to happen throughout New Zealand?
Answer:
Tectonic plates
Explanation:
All the natural disasters like earthquakes, volcanoes and geysers appear throughout the region of New Zealand because of the movement of tectonic plates underneath the surface. New Zealand rests on the edges of two tectonic plates including the Pacific and the Australian plates.
Two bar magnets are hung from metal rods and held in the position shown below. A rectangular box with 2 black lines running straight down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The magnets are released and swing freely. Which diagram best predicts their final position? A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The magnets are both hanging to the left. A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the left. The right magnet hangs to the right. A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the right. The right magnet hangs to the left. A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs straight down. The right magnet hangs to the right.
Answer:
IT IS C
Explanation:
I TOOK THE TEST ON EDGE PEEPS
Answer:
C
Explanation:
Two bar magnets are hung from metal rods and held in the position shown below.
A rectangular box with 2 black lines running straight down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets.
The magnets are released and swing freely. Which diagram best predicts their final position?
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The magnets are both hanging to the left.
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the left. The right magnet hangs to the right.
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the right. The right magnet hangs to the left.
A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs straight down. The right magnet hangs to the right.
Which is the correct electron configuration for the element nitrogen
Answer: 1s²2s²2p³ or it can also be 3s²2p³
A 182 pound male body was found decomposing in a dense wooded area 1.43 kilometers away from the nearest road. How many meters would a suspect have to drag the body into the woods if the victim was already deceased and transferred to this secondary location from the vehicle
Answer:
1430 meters
Explanation:
Complete the dot and cross diagram, in Figure 2, for tetrachloromethane, CCl4
Calculate the amounts of each substance in the reaction below if an initial amount of 0.400 moles are brought together with an initial amount of 2.29 moles of Cl2 in a 1.00 L vessel
Complete Question
Calculate the equilibrium amounts of each substance in the reaction below if an initial amount of 0.400 moles of CO are brought together with an initial amount of 2.20 moles of Cl2 in a 1.00 L vessel and then equilibrium is established at 900 K. Kc at this temperature = 0.800. COCl2(g) CO(g) + Cl2(g)
Answer:
The amount of each substance at equilibrium is
[tex][COCl_2 ] = 0.282 \ M[/tex]
[tex][CO] = 0.12 \ M[/tex]
[tex][Cl_2] = 2.008 \ M[/tex]
Explanation:
From the question we are told that
The initial amount of CO is [tex]n_1 = 0.400[/tex]
The initial amount of [tex]Cl_2[/tex] is [tex]n_2 = 2.20 \ moles[/tex]
The volume of the vessel is [tex]V = 1.0 \ L[/tex]
The temperature is [tex]T = 900 \ K[/tex]
The equilibrium constant at the given temperature is [tex]K_c = 0.800[/tex]
The reaction is
[tex]COCl_2 \underset{}{\stackrel{}{\rightleftharpoons}} CO + Cl_2[/tex]
Now Generating an I C E table
[tex]COCl_2 \ \ \ \ \underset{}{\stackrel{}{\rightleftharpoons}} \ \ \ \ \ \ \ \ \ CO \ \ \ \ \ \ \ \ \ \ + \ \ \ \ Cl_2[/tex]
Initial [I] 0 0.400 2.20
Change [C ] + x -x - x
Equilibrium [E ] x 0.400- x 2.20 - x
Here x is the amount in terms of concentration by which [tex]COCl_2[/tex] and [tex]CO[/tex] and [tex]Cl_2[/tex] decreased during the reaction
Generally the equilibrium constant is mathematically represented as
[tex]K_c = \frac{[CO] [Cl_2]}{[COCl_2]}[/tex]
=> [tex]0.800 = \frac{[0.400 - x] [2.20 - x ]}{[x]}[/tex]
=> [tex]0.800 x = [0.400 - x ] * [ 2.20 - x ][/tex]
=> [tex]x = 0.282 \ M[/tex]
Generally at equilibrium the amount of [tex]COCl_2[/tex] present is
[tex][COCl_2 ] = 0.282 \ M[/tex]
Generally the equilibrium the amount of [tex]CO[/tex] present is
[tex][CO] = 0.400 - 0.282[/tex]
=> [tex][CO] = 0.12 \ M[/tex]
Generally the equilibrium the amount of [tex]Cl_2[/tex] present is
[tex][Cl_2 ] = 2.29 - 0.282[/tex]
=> [tex][Cl_2] = 2.008 \ M[/tex]
In which sentence does the verb agree with the subject?
Answer:
go with that persons
Explanation:
Which statement compares the strengths of electric forces between particles
of matter?
A. Van der Waals forces and ionic bonds are weaker than hydrogen
bonds.
B. Hydrogen bonds and metallic bonds are weaker than ionic bonds.
C. Hydrogen bonds and metallic bonds are stronger than ionic
bonds.
D. Van der Waals forces and hydrogen bonds are stronger than
metallic bonds.
SUBMIT
The statement that compares the strengths of electric forces between particlesof matter is Hydrogen bonds and metallic bonds are weaker than ionic bonds.
What are electric forces?Electric forces are strong forces or power that exist between atoms of molecules which help to bind those are together and allow the flow of electric charges.
Therefore, statement that compares the strengths of electric forces between particlesof matter is Hydrogen bonds and metallic bonds are weaker than ionic bonds.
Learn more about electric forces below.
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protons,
neutrons and
Assuming the following element is neutral, it will have
electrons.
12
Mg
Magnesium
24.305
012, 12, 12
24, 24, 24
12, 24, 12
12, 12, 24
Answer:
Assuming the element Magnesium atom is neutral
Proton # = 12
Neutron # = 12
Electron # = 12
Explanation:
In a neutral atom the number of protons and electrons is always equal
The atomic number tells the number of protons (12) in this case
The Atomic Mass describes the mass of the protons + mass of neutrons, so if you take 12 (number of protons) away you are left with 12 and some change(number of neutrons)
Which statement best describes how people within a country may be different? O People know that each region has the same traditions and culture. O People from different regions have different cultures, values and languages. O People believe that people from each region are equal to one another. O People think that mountainous regions are more important than others.
Answer:
its B People from different regions have different cultures, values and languages.
Explanation:
i just took the assignment
Under careful and controlled supervision, Ashley is slowly adding 1 mL of a strong acid at a time to 30 mL of a strong base to measure the effect it had on the pH. What is the testing (independent) and outcome (dependent) variable of this experiment? What would a good control be?
Answer:
The independent variable is the volume of the strong acid added to the strong base
The dependent variable is the effect of the combination of the acid and base on the pH
Explanation:
The given parameters are;
The rate at which Ashley is adding the strong acid to the strong base = 1 mL per each time
The volume of the strong base to which Ashley is adding the acid = 30 mL
Therefore;
The testing, or independent variable of the experiment = The number of 1 mL volume of the strong acid Ashley adds to the strong base
The outcome, or dependent variable of the experiment = The measured (change) effect on the pH.
Explain the solute and the solvent in a solution
Answer:
a solute is a substance that is dissolved in the solvent (liquid)
a solvent is a substance that dissolves a solute (solid)
a solution is the mixture of both the solute and solvent forming uniform mixture
Please help, it’s due tonight and I can’t figure it out.
I don't know men sorry but You can see if some one have a idea about the
What is the evidence that Mars once had flowing liquid water? Why is this important?
Answer:
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars. Using an imaging spectrometer on MRO, researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen on the Red Planet. These darkish streaks appear to ebb and flow over time. They darken and appear to flow down steep slopes during warm seasons, and then fade in cooler seasons. They appear in several locations on Mars when temperatures are above minus 10 degrees Fahrenheit (minus 23 Celsius), and disappear at colder times.
Explanation:
Which reproductive structure is correctly paired with its functions
Answer:
(4) sperm - transports genetic material
Explanation:
Which reproductive structure is correctly paired with its function'?
(1) uterus - usual site of fertilization
(2) testis - usual location for egg development
(3) ovary - delivers nutrients to the embryo
(4) sperm - transports genetic material
Solution:
The uterus (also known as the womb) is where the fertiled egg (foetus) stays until it is ready to be delivered. The usual site of fertilization is the fallopian tube.
The testis is responsible for the production of sperm and hormones. The uterus is where the egg development takes place.
The ovary is responsible for the production of egg and hormones. The embryo receives nutrient through the fetus.
The sperm transports genetic material to the ovum.
Answer:
4
Explanation:
because ovaries def do not deliver nutrients to the embryo thats the placenta and the testis are DEF not a site for egg development and the uterus is not where fertilization happens i believe its where the fetus is kept and therefore the only correct answer is 4 :)
define liquor ammonia
Answer:
ammonia water especially : the impure solution obtained as a by-product in destructive distillation (as of coal, tar, and bones)
Explanation:
Answer:
liquor ammonia is the ammonia water especially , the impure solution obtained as a by-product in destructive distillation (as of coal, tar, and bones)