Answer:
➢ There are eight lone pairs of electrons in each of the three resonance structures of NO3- ion. These eight lone pairs are provides by three oxygen atoms. There are no lone pairs on nitrogen atom.
[tex]Into \: your Arms[/tex]
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Which element will have a noble gas configuration if it forms an ionic
bond by accepting one electron from a sodium atom?
A Cl
B S
C K
D Ca
Answer:
A. Cl
Explanation:
because chlorine is an halogen so it needs only one electron in order for it to obtain a full outer shell.
What do claims show about the writer? Select two answers. (1 point) his or her conclusions that have been formed about the topic his or her writing process with a certain topic his or her flexibility when writing about a topic his or her beliefs about the topic that is being written about his or her organizational structure for writing about the topic
When a writer makes claims about a particular subject, the claim shows the opinions they have formed about the topic. It will also show their beliefs about the subject matter. Thus, the correct answers are A and D.
What are claims in Literature?Claims in literature are statements of an assertion that are written to validate an argument or line of thought.
Writers of non-fiction use claim to present their thoughts or the position of others as regards a subject matter while fiction writers use the same to present the views of their characters or narrators.
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what is matter? What is mixture?
Answer:
Matter is any substance that has mass and takes up space by having volume. Mixture is a substance made by mixing other substances together.
Matter is anything that has mass and occupies space.
Mixtures are substance composed of two or more constituents in physical combination.
What is matter?Matter is anything that has mass and occupies space.
Everything in the universe is composed of matter.
Matter exists in three states:
solid liquid gasWhat is a mixture?A mixture is a substance which is made up of two or more constituents physically combined together.
Mixtures are either homogenous or heterogeneous.
Examples of mixture are brass and salt solution.
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. A strong acid, HCl, is titrated with a strong base, NaOH. Write the net ionic equation for the reaction. Do not include spectator ions in the equation.
which of the following groups use accounting information a.the tax department. b.business owners. c.investor. d.all of above
Answer:
D
Explanation:
if they didn't all use accounting skills and info I'd be considered
Which of these statements about the Plum-Pudding Model is incorrect?
It was disproven by Ernest Rutherford.
It is a model of the atom that had electrons within a positively charged sphere.
It is a model of the atom that has electrons surrounding the nucleus.
It was proposed by J. J. Thomson.
Answer:
It is a model of the atom that has electrons surrounding the nucleus
Step by step explanation:
When the sun,the moon,and the Earth are arranged in this order,a ______eclipse is most likely to occur
Answer:
Lunar
Otherwise its solar, but im 99% sure its Lunar
Answer:
Solar Eclipse.
Explanation:
not exactly sure
5 points
16. What is the change in the water's freezing point when 500 grams of
glucose (see image of C6H1206 below) are added to 750 grams H20? (Kf
water = 1.86 C/m) *
C6H1206
-0.686 °C
- 6.86 °C
A.
B.
- 68.6 °C
- 686 °C
O
C.
D
Answer:
its B
Explanation:
your welcome brainliest and 5 star
Which compound accumulates in the metabolic disorder alkaptonuria?.
Medicine X has a density of 50 g/mL. How many mL of medicine X would you
need to give a 100 g dose?
Answer: 2 m/L
Explanation: If there is 50g in every m/L and you need 100g, you can take the 100g / 50g, and you have 2, meaning two sets of 50 grams, or in this case to m/L of medicine, because each m/L has 50 grams of medicine in it.
why are some bases insoluble?
Answer:
bases which are not soluble in water do not give the hydroxyl ions and so they are treated differently from soluble bases called alkalis.
Pls help one chemistry question :/
In the following reaction, the energy of the reactants is 860 kJ/mol and the bond energy of the products is 680 kJ/mol. What is the total energy of the reaction? Is the reaction endothermic or exothermic?
A. 1340 kJ/mol, endothernic
B. 180 kJ/mol, endothernic
C. -180 kJ/mol exothermic
D. -1340 kJ/mol exothermic
The heat of reaction is 180 kJ/mol hence the reaction is endothermic.
What is bond energy?Bond energy is the energy that is required to form a bond and must be supplied in order to break the bond. In the question, we are told that the energy of the reactants is 860 kJ/mol and the bond energy of the products is 680 kJ/mol.
Heat of reaction = Bond energy of reactants - Bond energy of products
= 860 kJ/mol - 680 kJ/mol = 180 kJ/mol hence the reaction is endothermic.
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What quantity of 75% acid solution must be mixed with a 20% solution to produce 220 mL of a 50% solution
Answer:
You will have to mix 240 mL of 75% acid with 300 mL of 30% acid to produce 540 mL of 50% acid
Explanation:
A car is driving down the road. It starts from rest. It speeds up to a speed of 10 m/s.
Does the car accelerate? If so, is its acceleration positive or negative? Explain
Answer:
If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases. The decreasing speed is called negative.
What kind of factors are light, temperature, and soil composition? biotic habitat ecological abiotic
Answer:
Your answer is D, Abiotic.
Hope this helped you!
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Directions: Predict the products for each of the following reactions IN WORDS ONLY.
1. Calcium + Magnesium sulfide →
2. Sodium + Silver chloride →
3. Iron(II) sulfide + potassium →
4. Barium + Aluminum nitrate →
5. Potassium iodide + chlorine →
6. Zinc + Lead(IV) chloride →
7. Silver + sulfuric acid →
8. Barium
+
water →
9. Tin + hydrochloric acid →
10.
Gallium bromide + fluorine →
11.
Water + potassium →
Chemical reaction has to do with the interaction of substances to form a new substance sometimes involving the release of energy.
What is a chemical reaction?The term chemical reaction has to do with the interaction of substances to form a new substance sometimes involving the release of energy.
The following completes each of the equations shown;
1. Calcium + Magnesium sul-fide → calcium sul-fide + magnesium
2. Sodium + Silver chloride → sodium chloride + silver
3. Iron I I sul-fide + potassium → Potasium sul-fide + iron
4. /Ba/rium + Aluminum ni.trate → /Ba/rium n.itrate + aluminium
5. Potassium iodide + chlorine → Potassium chloride + i.odine
6. Zinc + Lead I V chloride → Zinc I I chloride + lea.d
7. Silver + sul-furic acid →Silver sul-fate + water
8. /Ba/rium + water → /Ba/rium hydroxide + hydrogen
9. T.in + hyd.rochloric acid → Ti.n IV chloride + hydrogen
10.G.allium br-omide + fl-uorine → Ga.lium fl-uoride + br-omine
11.Water + potassium → potassium hydroxide + hydrogen
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Energy
In this scenario, electrical Energy is transferred to___Energy
Answer:
light
Explanation:
I'm not sure to my answer but hope it helps if it is correct:)
A sample of matter is that extreme temperatures with particles moving so quickly that their collisions release electrons from the atoms. This creates a mixture of electrons in positively charged ions with high kinetic energy. What phase of matter does this describe?
A)Gas
B)Liquid
C)Plasma
D)Solid
C)Plasma
.............this was for 20 characters to submit the answer-dont mind this
Matter exists in three different physical states, namely solid, liquid and gaseous state. The plasma is also an another state of matter. The correct option is C.
What is plasma?The plasma is defined as the fourth state of matter. It is a hot ionized gas which consists of approximately equal numbers of positively charged ions and negatively charged electrons. It is not same as the neutral gas.
Since plasma contains electrically charged particles, they are strongly influenced by the magnetic and electric fields while the neutral gases are not. Like gases plasmas have no fixed volume or shape.
The density of plasma is also found to be less than solids or liquids. The plasma is known as a charged gas with strong electrostatic interactions. It is the plasma which make up the sun and stars and it is the most common state of matter in the universe as a whole.
Thus the correct option is C.
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The ability of materials to act as conductors and insulators is relative. All materials, even those that are commonly classified as insulators, still allow some conduction of heat. For example, ceramic is a better conductor than Styrofoam. A ceramic mug filled with hot water feels warmer in your hand than a Styrofoam cup filled with hot water. However, ceramic is a worse conductor than metal. A metal mug filled with hot water would feel even hotter than the ceramic mug.
Which of the following accurately represents the relationship between ceramic and metal?
A
Metal and ceramic are equally effective conductors.
B
Metal is a better conductor than ceramic.
C
Metal is a better insulator than ceramic.
D
Metal does not conduct heat.
B. Metal is a better conductor then cramic
nice to help you-!
what systems might not work right when you have a cold
Answer:
hello :3
A cold is a contagious upper respiratory infection that affects your nose, throat, sinuses and trachea (windpipe).
Explanation:
have a nice day :3
UNIT 4: Name/Writing Chemical Compounds Worksheet
Name the following ionic compounds
Ionic compound is defined as those which contains ion and are held together by the attractive forces among the oppositely charged ions.
The names of the ionic compounds is given above and is the most appropriate answer.
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Calculate the number of moles in 9.22 X 10^23 atom iron
Huge loops of plasma erupting from the sun are called.
Answer:
magnetic Flux ropes
Explanation:
Magnetic flux ropes (also known as coronal loops and solar prominences) sit on the surface of the sun, with matter and energy flowing through them, for hours or days.
4. Solid magnesium reacts with diatomic nitrogen gas to produce solid magnesium nitride.
If 2.4 grams of magnesium react in an excess of nitrogen, how many moles of
magnesium nitride are formed?
[tex]\\ \rm\longmapsto 3Mg+N_2\longrightarrow M_3gN_2[/tex]
Moles of Mg:-
[tex]\\ \rm\longmapsto \dfrac{2.4}{24}=0.1mol[/tex]
Here
3mol of Mg produces 1 mol magnesium nitride1mol of Mg produces 0.33mol Magnesium nitride.0.1mol of Mg will produce 0.33(0.1)=0.033mol Mg_3N_2What are the forces on the wooden block when it is resting on a bench
Answer:
As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases
Explanation:
Since the static frictional force between the block and the plane is given by F = μN where
μ = coefficient of static friction and
N = normal force on plane = component of weight of block perpendicular to the plane = Wcosθ where
W = weight of block and
θ = angle of inclined plane
Now, F = μN
F = μWcosθ
Since μ and W are constant, we see that
F ∝ cosθ and cosθ ∝ θ
So, F ∝ θ
Since the static frictional force is directly proportional to the angle the plane makes with the horizontal, when the angle the plane makes with the horizontal is increased, the static friction between the block and the plane increases.
So, As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases
Calculate the ΔGr0 of the following reaction and state whether it is spontaneous at standard temperature or not. (You will need table B-12 in your CRG)
2AgNO3(aq)+MgCl2(aq) → 2AgCl(s) + Mg(NO3)2(aq)
Options are
1 - (151.38 kJ, yes
2 - (-150.14 kJ, yes
3 - (101.38 kJ, no
4 - (-131.14 kJ, yes
5 - (-131.38 kJ, no
The standard free energy change of the reaction is -150.14 kJ and the reaction is spontaneous.
What is a spontaneous reaction?A spontaneous reaction is a reaction in which further supply of energy is not required once the reaction ha gotten underway. The standard enthalpy change of a reaction is obtained from;
ΣΔG°reactants - ΣΔG°products
Having applied this and from the values of the standard free energy of each specie, the standard free energy change of the reaction is -150.14 kJ and the reaction is spontaneous.
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I need help with my chem work
Answer:
D
Explanation:
The more predators their are the less prey there are
the constant diameter of the double helix is ensured because hydrogen bonding is always between a(n)
We can confirm that the diameter of the double helix structure of DNA stays the same because hydrogen bonding is always between the A and T bases and the G and C bases.
What are these bases in DNA?The AGCT bases in DNA are the nucleotides that comprise it. These nucleotides include
Adenine Cytosine GuanineThymineBy always bonding adenines with thymine and Guanine with cytosines, the DNA strand maintains a constant diameter.
Therefore, we can confirm that the diameter of the double helix structure of DNA stays the same because hydrogen bonding is always between the A and T bases and the G and C bases.
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How would I do this? A beaker contains 50.0 mL of 0.25 M aluminum nitrate solution. What is the minimum volume of 0.2 M sodium sulfide solution that must be added in order to precipitate out all of the aluminum ions from the solution?
The minimum volume of 0.2M sodium sulfide that will precipitate out aluminum from 50.0 mL, 0.25 M aluminum nitrate would be 0.094 L or 94 mL
Stoichiometric calculationFrom the equation of the reaction:
[tex]2Al(NO_3)_3 + 3Na_2S ---> Al_2S_3 + 6NaNO_3[/tex]
Mole ratio of Na2S and Al(NO3)3 = 3:2
Mole of 50.0 mL, 0.25 M Al(NO3)3 = 50/1000 x 0.25
= 0.0125 mole
Equivalent mole of Na2S = 3/2 x 0.0125
= 0.0188 mole
Volume of 0.2M, 0.0188 mole Na2S = 0.0188/0.2
= 0.094 L or 94 mL
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The above map shows the route of a car traveling from home to the
park. If the car is traveling at a constant speed, does the car
accelerate at any point on the route? Yes or No, and explain your
reasoning.
Answer:
Yes there is turns and strait points
Explanation: