1.Which of these statements about the
conservation of mass is not correct?
A.The mass of the products will be equal to the
mass of the reactants.
B.During a chemical reaction, no mass is
created or destroyed.
C.There will be the same number and type of
atoms before and after a chemical reaction.
D.All of the above are correct.
Answers
Related Questions
If you throw a ball into the air, the force of ________ makes the ball fall back toward Earth.
Answers
. 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.
Answers
Which compound accumulates in the metabolic disorder alkaptonuria?.
Answers
Homogentisic acid
What quantity of 75% acid solution must be mixed with a 20% solution to produce 220 mL of a 50% solution
Answers
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:
confused as heck. please help!
Answers
Answer: that all thre water cycle and C is vaporation
Explanation:
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
Answers
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.
the constant diameter of the double helix is ensured because hydrogen bonding is always between a(n)
Answers
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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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
Answers
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.
See the link below for more about Claims:
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I need help with my chem work
Answers
Answer:
D
Explanation:
The more predators their are the less prey there are
Energy
In this scenario, electrical Energy is transferred to___Energy
Answers
Answer:
light
Explanation:
I'm not sure to my answer but hope it helps if it is correct:)
Huge loops of plasma erupting from the sun are called.
Answers
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.
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
Answers
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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Consider the chemical equilibrium of a soap that is present in its aqueous solution. C17H35COONa(aq) Double headed arrow. C17H35COO–(aq) Na (aq) sodium stearate (soap) stearate ion What will happen if a large quantity of NaCl is added to the aqueous solution? The equilibrium will shift to the right, favoring the dissociation of soap in aqueous solution. The equilibrium will shift to the left to such an extent that it leads to the precipitation of solid soap. The equilibrium will not be affected by the addition of NaCl to the solution. The equilibrium will be permanently destroyed by the addition of NaCl.
Answers
The chemical equilibrium has the concentration of reactants and products equal. The addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation.
What is a common ion effect?The chemical equation for the reaction is:
[tex]\rm C_{17}H_{35}COONa\;\leftrightharpoons C_{17}H_{35}COO^-\;+\;Na^+[/tex]
The addition of NaCl to the reaction results in the dissociation of Na and Cl ions.
At the equilibrium condition, the concentration of all the species is equal. The addition of NaCl results in an increase in the product concentration in the solution, with the common ion effect.
The increase in the product concentration results in the reaction moving towards the reactant formation and process in the left direction.
Thus, the addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation. Thus, option B is correct.
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Answer:
the correct answer is (B The equilibrium will shift to the left to such an extent that it leads to the precipitation of solid soap.)
i just took the test
Explanation:
UNIT 4: Name/Writing Chemical Compounds Worksheet
Name the following ionic compounds
Answers
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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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?
Answers
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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what systems might not work right when you have a cold
Answers
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
All people who are asked to testify in a criminal case must first be issued a subpoena by law enforcement.
A. True
B. False
Answers
Answer:
Option B
Explanation:
All people who are asked to testify in a criminal case must first be issued a subpoena by law enforcement, is a "false statement" or option B. A subpoena is a request to appear in court which is usually given out by the attorneys who are a part of the case, the law enforcement does not give out subpoenas, so this is indeed a false statement.
Hope this helps.
Answer: B
Explanation:
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.
Answers
Answer:
Yes there is turns and strait points
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
Answers
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.
WW
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 →
Answers
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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which of the following groups use accounting information a.the tax department. b.business owners. c.investor. d.all of above
Answers
Answer:
D
Explanation:
if they didn't all use accounting skills and info I'd be considered
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
Answers
Answer:
its B
Explanation:
your welcome brainliest and 5 star
Medicine X has a density of 50 g/mL. How many mL of medicine X would you
need to give a 100 g dose?
Answers
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.
Calculate the number of moles in 9.22 X 10^23 atom iron
Answers
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?
Answers
[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_2Pls 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
Answers
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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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.
Answers
B. Metal is a better conductor then cramic
nice to help you-!
what can a chemical reaction be concisely represented by
Answers
When the sun,the moon,and the Earth are arranged in this order,a ______eclipse is most likely to occur
Answers
Answer:
Lunar
Otherwise its solar, but im 99% sure its Lunar
Answer:
Solar Eclipse.
Explanation:
not exactly sure
water is stored where until it is used by the cell
Answers
Answer: The water Inside the cell is stored inside the vacuole(s)
Explanation:
Hope this helps :)