Answers
Answer:mmhm
Explanation:
mhhm
Answer:
do u want the answer now?
Related Questions
EXPLAIN Before medical images are taken, radioisotopes are often injected into a vein in a patient’s arm, or the patient drinks a solution containing the radioisotopes. Why do
you think atoms in the body usually do not emit radiation?
Answers
Answer: adioisotopes, are species of chemical elements that are produced through the natural decay of atoms. Exposure to radiation generally is considered harmful to the human body, but radioisotopes are highly valuable in medicine, particularly in the diagnosis and treatment of disease.
Explanation:
Global climate change is
a.
a politically motivated deception generated by scientists with an environmentalist agenda.
b.
hotly debated by a deeply divided scientific community.
c.
a hypothesis that is not yet well supported by scientific evidence.
d.
understood by science to be a fact, and as largely the result of human activities.
Answers
Plz help me : Copper (I) chloride CuCl is made up of:
A. all metals
B.all nonmetais
C. Metal and nonmetal
Answers
The indicator methyl red has different molecular structures at high and low pH.
a. True
b. False
Answers
Answer:
a. True
Explanation:
Methyl red is an indicator widely used in quality control of oxides as Zinc oxide in the titration with sulfuric acid.
As is used in titrations of acid-base reactions the indicator change in colour. Is red when the pH < 4.4 (Acidic Solutions) and is yellow when pH > 6.2 (Neutral-Basic solutions).
A change in colour means the structure of the indicator is changing with pH. Thus, the answer is:
a. TrueHow many grams would 8.88 x 1029 atoms of NaCl be equivalent to?
Answers
Answer:
8.65x10 7 grams of nacl
Explanation:
There are 6.02x10 23 atoms per one mol
so
8.88x 10 29 x (1/6.02 x 10 23)
Will give us mols of NaCl
to go from mols to grams we multiple mols by molar mass
so
1.48x10 6 mols of Nacl x 58.44 g/mol = 8.65x10 7 grams of nacl which can be converted to
86500 kg
The bond that holds together positive and negative ions is
called a(n) bond.
Answers
Answer:
Ionic bond
Explanation:
An ionic bond holds positive and negative ions together.
which statements describe what happen in a redox reaction?
a. one atom gains electrons and one loses electrons
b. the cations on two substances trade places
c. electrons move from one substance to another
d. there are two oxidation reactions
Answers
Answer:
A or C
Explanation:
I don't know if I'm correct but I think it's A or C you don't have to choose them.
What are greenhouse gases?
Answers
The name of an alcohol side chain is known as an alkoxy group. True or false?
Answers
though, paired with a hydrogen bond, it is.
If i’m wrong, please feel free to let me know :)
26. The water of the surface of the ocean is termed surface currents and moves in a regular pattern. They don't depend on the weather and move heat around Earth. What two things create surface currents?
Answers
What contains a single element 1. Acid/Base 2. Redox 3. Precipitation
Answers
Answer:
hydrogen ion dissolve in water is acid and hydroxide ion dissolve in water is basi
the recation in which oxidation and reduction goes side by side is redox redaction
Fe2O3 + 6HCl → 2FeCl3 + 6H20 How many atoms of FeCl3 will be produced if 9.3 x 1023 atoms of HCl are used for this reaction? 6.7 x 1023 atoms FeCl3 3.1 x 1023 atoms FeCl3 9.3 x 1023 atoms FeCl3 1.2 x 1023 atoms FeCl3
Answers
Answer:
3.1x10²³
Explanation:
I'm going to answer the question assuming the number of molecules of FeCl₃ is asked, rather than the number of atoms.
Fe₂O₃ + 6HCl → 2FeCl₃ + 6H₂OFirst we convert 9.3x10²³ atoms of HCl into moles of HCl, using Avogadro's number:
9.3x10²³ atoms ÷ 6.023x10²³ atoms/mol = 1.54 mol HClThen we convert 1.54 moles of HCl into moles of FeCl₃, using the stoichiometric coefficients of the reaction:
1.54 mol HCl * [tex]\frac{2molFeCl_3}{6molHCl}[/tex] = 0.51 mol FeCl₃Finally we calculate how many FeCl₃ molecules are there in 0.51 moles:
0.51 mol * 6.023x10²³ molecules/mol = 3.4x10²³ moleculesThe closest option is 3.1x10²³.
The number of atoms produced is four times the number of FeCl₃ molecules produced.
Why don’t different varieties of corn plants grow to the same size under similar growing conditions?
Answers
Suppose the galvanic cell sketched below is powered by the following reaction: (s)(aq)(aq)(s) Write a balanced equation for the half-reaction that happens at the cathode of this cell. Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is E1 made? Of what substance is E2 made? What are the chemical species in solution S1? What are the chemical species in solution S2?
Answers
Answer:
Hello the required Image related to your question is missing attached below is the missing Image
answer :
a) Ni²⁺(aq) + 2e⁻ ⇒ Ni(s)
b) Fe(s) ⇒ Fe²⁺(aq) + 2e⁻
c) Fe (s)
d) Ni ( s )
e) Fe²⁺(aq) and SO⁻²₄ (aq)
f) Ni²⁺(aq) and SO⁻²₄(aq)
Explanation:
a) Balanced equation for the half-reaction at the cathode of the cell
Ni²⁺(aq) + 2e⁻ ⇒ Ni(s)
b) Balanced equation for half reaction at the anode of the cell
Fe(s) ⇒ Fe²⁺(aq) + 2e⁻
c) E1 is made of Fe (s)
d) E2 is made of Ni ( s )
e) chemical species in solution S1 = Fe²⁺(aq) and SO⁻²₄ (aq)
f) Chemical species in solution S2 = Ni²⁺(aq) and SO⁻²₄(aq)
"Calculate the pH of a 0.15 M HBr solution AND classify the solution of acidic, neutral, and basic"
a. 0.82 basic
b. 0.82 acidic
c. 13.9 basic
d.13.9 acidic
Answers
Answer:
la respuesta es la letra: b
If you started with 23g of Mg and 412 ml of 2.6M HCl, find the limiting reactant. If you collected the hydrogen gas over water at a temperature of 81OC, what is the volume of just the water if the total pressure is 2.23 atm? How many grams of water vapor are in the container?
Answers
Answer:
See explanation.
Explanation:
Hello there!
In this case, according to the description of the chemical reaction, it is possible to write the corresponding equation as follows:
[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]
Whereas we are given the mass of magnesium and the concentration and volume of HCl; it means that we can calculate the moles of hydrogen yielded by each of these reactants in order to identify the limiting reactant:
[tex]m_{H_2}^{by\ Mg}=23gMg*\frac{1molMg}{24.305gMg}*\frac{1molH_2}{1molMg}=0.95gH_2 \\\\m_{H_2}^{by\ HCl}=0.412L*2.6\frac{molHCl}{1L}*\frac{1molH_2}{2molHCl}*=0.54gH_2[/tex]
Therefore, we infer that the limiting reactant is HCl as it yields the fewest moles of hydrogen. Next since the vapor pressure of water at 81 °C is about 0.4675 atm we infer that the pressure of hydrogen is 2.23 atm - 0.4675 atm = 1.7625 atm. In such a way, we use the ideal gas equation to obtain the volume of hydrogen:
[tex]V_{H_2}=\frac{0.54molH_2*0.08206\frac{atm*L}{mol*K}*(81+273.15)K}{1.7625atm} \\\\V_{H_2}=8.9L[/tex]
Finally, since the pressure of water is 0.4675 atm and the volume is the same for both, we obtain the moles of water and subsequently the required grams as shown below:
[tex]n_w=\frac{0.4675atm*8.9L}{0.08206\frac{atm*L}{mol*K}*(81+273.15)K} \\\\n_w=0.143molH_2O\\\\m_w=0.143molH_2O*\frac{18.02gH_2O}{1molH_2O} =2.6gH_2O[/tex]
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If sugar was broken back down into CO2 and H2O what kind of change would that be?
A. Chemical change
B. Radical change
or
C. Physical change
Answers
Answer: chemical change
Does sublimation change chemical or physical change
Answers
Answer:
Yes, sublimation is a physical change because it involves a change of state from solid to gas of a substance when it is heated.
Explain, in terms of subatomic particles in energy states, how the colors in a fireworks display are produced
Answers
Salts are heated to extremely high temperatures during a display of fireworks. The salts' ions pick up energy and get excited. Exciting hues are created as energy in the form of light is emitted from the ions. Each salt's metal ion can be identified by the hue of the light that is emitted.
What are subatomic particles?Subatomic particles refer to the three fundamental particles that make up the atom.
The subatomic particles include:
electronsprotons, and neutronsElectrons occupy several energy states. When electrons gain energy, they move to a higher energy state. The electrons on returning to a lower energy state emit radiation that is seen as several light color displays in fireworks.
Lear more about subatomic particles at: https://brainly.com/question/16847839
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A student is studying the rate of the following reaction: C2H4O NaOH --> H20 NaC2H3O Knowing that this is an exothermic reaction, he is measuring the rate of the reaction by timing how quickly the reaction vessel heats up. He notices that if he adds HCl to this reaction, the rate increases dramatically. He also determines that the HCl is being used up during the reaction. Is the HCl a catalyst for this reaction.
Answers
Answer:
HCl is not a catalyst because these are not used up during the chemical reactions.
Explanation:
Hello there!
In this case, according to the performed experiments, it is possible for us to realize that HCl cannot be a catalyst for this reaction because it is used up during the reaction. This is explained by the fact that catalyst are able to return to the original form once the reaction has gone to completion; this is the example of palladium in the hydrogenation or dehydrogenation of hydrocarbons depending on the case. Moreover, we know that the catalysts increase the reaction rate because they decrease the activation energy of the reaction and therefore the student observed such increase.
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Alleles are different forms of which genetic structure?
A. DNA
B. Cells.
C. Genes
D. Chromosomes
Answers
Answer:
answer is c
Allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
a point of reference is anything that seems steady that is used compare the position of an object
TRUE OR FALSE?
Answers
Answer:
True
Explanation:
hope it'll help!!
That statement would be true
____________Polar regions get less of the sun's direct rays, they are the coldest climates on Earth. A because , B although, C Howerer, D Consequently / what best word fits in the blank space what makes sense.
Answers
Answer:
Because Polar regions get less of the sun's direct rays, they are the coldest climates on Earth.
Explanation:
Four hundred and fifty two
bullfrogs live in a marsh that
is sixty eight square
kilometers. What is the
population density of the
bullfrogs
per square
kilometer?
WILL GIVE BRAINLIST
Answers
Answer: 6.65 bullfrogs per square
kilometer
Explanation:
The formula to calculate the population density will be:
= N/A
where,
N = total population = 452
A = land area = 68km²
Therefore, population density will be:
= N/A
= 452/68
= 6.65 bullfrogs per square
kilometer
Which type of molecule is shown below?
O A. Alkyne
O B. Alkane
C. Alkene
O D. Aromatic
Answers
The type of molecule shown in the image has been an alkyne. Thus option A is correct.
The molecules formed by hydrogen and carbon are hydrocarbons, These are the organic compounds with the sharing of electrons in between the atoms.
The number of electrons shared results in the bond formed. The compound with only a single bond has been alkane. The presence of sharing of 2 atoms results in a double bond, and the compounds are alkene. The triple bond compounds are alkynes.
The given structure has the presence of a triple bond in the structure, thus the image has been of an alkyne. Thus, option A is correct.
For more information about hydrocarbons, refer to the link:
https://brainly.com/question/17578846
how many grams of hexane(C6H14) would be need to make 562 of carbon dioxide
Answers
The mass of hexane, C₆H₁₄ that would be needed to produce 562 grams of carbon dioxide, CO2 is 183 g
How do I determine the mass of hexane, C₆H₁₄ needed?We'll begin by writing the balanced equation for the reaction.
2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O
The following are obtained from the equation:Molar mass of C₆H₁₄ = 86 g/molMass of C₆H₁₄ from the balanced equation = 2 × 86 = 172 g Molar mass of CO₂ = 44 g/molMass of CO₂ from the balanced equation = 12 × 44 = 528 gFrom the balanced equation above,
528 g CO₂ were produced from 172 g of C₆H₁₄
With the above information, we shall determine the mass of hexane, C₆H₁₄ needed to produce 562 g CO₂. Details below:
From the balanced equation above,
528 g CO₂ were produced from 172 g of C₆H₁₄
Therefore,
562 g of CO₂ will react to produce = (562 × 172) / 528 = 183 g of C₆H₁₄
Thus, the mass of hexane, C₆H₁₄ needed is 183 g
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What is the molecular formula of a compound with a molecular mass of 63.0g and an empirical formula of CH3O
Answers
Answer:
I think first molar mass of ch3o which is 31
Explanation:
Let's repeat this process for the atoms that make up the substances that do not conduct when dissolved in water. What do you notice now?
Answers
Answer:
Explanation:
If they do not disolve in water they are non electrolyte and hence will not conduct eletricity. If you had a lab where a batter was supplying power and the wire carryin the electricity went through a water bath if the water was pure and nothing disolved in it the light would not turn on but if you added something like salt it would conduct the electricity
Help me please please i is in middle school need help ple
Answers
the answer is that it is a
Reactants are an acid and a base, which one describes this? 1. Acid base 2. Redox 3. Precipitation 4. Combustion
Answers
Answer:
The answer is 1. acid-base
Explanation:
This is pretty self-explanatory, when an acid and base react, it is called an acid-base reaction. Redox reactions are where two reactants exchange electrons, precipitation reaction is where a solid is formed, and combustion reaction is where a compound is reacted with oxygen so none of those can be the answer.