The student repeated the experiment using a higher concentration of acid. The same volume of acid and the same mass of magnesium ribbon were used. What volume of hydrogen gas would have been produced after 60 seconds?
Answers
Answer:
53 cm³
Explanation:
When the student used dilute sulfuric acid, the reaction was complete after 60 s, because no more hydrogen was formed in the next 10 s.
The reaction would go faster if the student used a more concentrated acid, but 53 cm³ of hydrogen is the most that would form.
Related Questions
Given pH = 3.50 Find: [H3O+] and [OH-] Is this acidic, basic or neutral?
Answers
Answer:
Explanation:
Given parameters:
pH = 3.50
Unknown:
concentration of [H₃0⁺] = ?
concentration of [OH⁻] = ?
Solution:
In order to find the unknown, we use some simple expressions which best explains the pH scale and the equilibrium systems of aqueous solutions.
pH = -log₁₀[H₃O⁺]
[H₃O⁺] = inverse log₁₀ (-pH) = [tex]10^{-pH}[/tex] = [tex]10^{-3.5}[/tex]
[H₃O⁺] = 3.2 x 10⁻⁴moldm⁻³
For the [OH⁻]:
we use : pOH = -log₁₀ [OH⁻]
Recall: pOH + pH = 14
pOH = 14 - pH = 14 - 3.5 = 10.5
Now we plug the value of pOH into pOH = -log₁₀ [OH⁻]
[OH⁻] = [tex]10^{-pOH}[/tex]
[OH⁻] = [tex]10^{-10.5}[/tex] = 3.2 x 10⁻¹¹moldm⁻³
The solution is acidic as the concentration of H₃0⁺ is more than that of the OH⁻ ions.
Mrs. DeFord wanted to know whether or not her students would do better on a quiz if she promised them candy.
She went to the library and read several studies about the effect of giving food to lab animals. She found out that if animals were given food as a reward for doing something, they usually did better the more reward they were given.
She figured that the more candy her students were promised, the better they would do on the quiz.
She had all of her classes participate in the experiment; there were four groups in all. Each group had the same number of boys and girls, they were all given the same quiz, they were all the same age, of the same ability, and they came from the same background.
The first group was not promised any candy. The second group was promised 1 candy bar if they did well on the quiz. The third group was promised 2 candy bars and the fourth group was promised 3 candy bars, for doing well on the quiz.
Group #1 got an average of 70% on the quiz. Group #2 got an average of 80%, Group #3 got an average of 90%, and Group #4 got an average of 95%.
Identify the following:
a. Independent Variable:
b. Dependent Variable:
c. Constants (at least 2):
d. Testable Question:
e. Hypothesis:
f. Formal Conclusion Statement (refer back to the hypothesis...accepted/rejected...because the data shows...):
Answers
Answer:
a.) Independent Variable: # of candy bars promised to each group
[ The Independent Varaiable is what you change in the experiment]
b.) Dependent Variable: Quiz Scores
[ The Dependent Variable is what you're testing in the experiment; what the experiment should affect]
c.) Constant(s): Same Quiz, same number of gender kids in each group, same age kids in each group, same ability, and same background. [and same time, I'm assuming.]
[Constants are what you keep the same in the experiment; what you're not changing.]
d.) Testable Question: Will promising kids candy make them do better on tests and quizzes? [or something along this lines of this]
[The Testable Question is what you're trying to find out in the experiment]
e.) Hypothesis: The more candy the students were promised, the better results Mrs. DeFord would get from them.
[The Hypothesis is what the person performing the experiment expects will happen; an educated guess]
f. Formal Conclusion: Data shows that kids who were promised more candy had a better average than kids who were promised less candy/none. Mrs. DeFord's hypothesis was correct, since she assumed the more candy the students were promised, the better they would do on the quiz.
[The Formal Conclusion is what you have learned from the experiment, and wether or not the hypothesis was correct or not.]
I hope this helps! :)
Number of candy bars
Dependent variable:
Performance on test
Constants:
Everything listed in the fourth paragraph (number of students, number of boys and girls, same quiz, etc.)
Testable question:
Do students perform better on quizzes if they’re rewarded with candy bars?
Hypothesis:
Students will perform better on the quiz when rewarded with candy bars.
Formal conclusion statement:
The hypothesis is accepted because the students performed better on the quiz when they were rewarded with candy bars, and the more candy bars they were promised, the better their performance.
The diag
in dilute
Page 6 of 12
A6
A5
(a)
Fluorine, chlorine, bromine and iodine are placed in the same Group of the
Periodic Table.
State the common name used to describe elements in this Group.
(i)
State the Group in which the elements are placed and explain why
they are placed in that Group.
(ii)
Which of the above named elements is a solid at room
temperature and pressure?
Answers
Answer:
Here's what I get.
Explanation:
(a) F, Cl, Br, and I are called halogens (salt formers)
(i) They are placed in Group 17, the Group just before Group 18 (the noble gases), because they need just one more valence electron to get a noble gas electron configuration.
(ii) At room temperature, iodine is a lustrous, purple-black solid that melts to form a deep violet liquid at 114 °C.
When a device is used in a circuit in which the voltage is 81 v The current flowing through the device is 3 A what is the resistance of The Device
Answers
Answer:
= 27Ω
Explanation:
The voltage of a device = Resistance × Current
V=RI
Making R the subject of the formula we have R= V/I
Thus resistance = Voltage/ Current
V= 81 V
I = 3 A
Using these values in the formula for resistance we can then find the resistance of the device as follows.
R = 81 V/ 3 A
= 27Ω
PLZZZ HELP The normal range of blood glucose is 70–120 mg/dL. A person has a blood glucose level of 170 mg/dL. Based on your knowledge of the endocrine system and hormones, explain the likely cause for the person's condition.
Answers
Answer:
Insulin and glucagon are the hormones that cause blood glucose (blood sugar) preserved in a narrow range. The pancreas serves as the central part of this process. Secreted by the pancreas are both insulin and glucagon. Determined by the production of insulin and glucagon, people can find out whether someone may have diabetes, hypoglycemia, low blood pressure, etc. Insulin or glucose can be prescribed to victims of those listed issues, it is mostly used to balance out the level of glucagon and insulin to try to stop the problem.
A team of engineers has decided to design a new shoe for people suffering from a painful foot condition. Each of the following tasks is necessary for the engineers to undertake during the beginning phase of the project except which?
A. Have subjects wear the shoes in an experimental trial to see if symptoms improve
B. Do research on orthopedic shoes that have already been designed for this condition
C. Estimate the price potential consumers would be willing to pay for this product
D. Look into the available materials and weigh the advantages and disadvantages of each
Answers
Answer:
A. have subjects wear the shoes in an experimental trial to see if symptoms improve.
Answer: Option A
Explanation:
When the team of engineers decided to design a footwear that will help the people suffering from painful foot condition that is caused by footwear.
There are many steps in designing such a footwear that is helpful in treating this problem. First of all they will look the other footwear available in the market and the problem that is not being solved by the available option.
They will do research and study a bit of orthopedics to get more knowledge about the bones and shoes.
They will also estimate the cost of shoes. But they will not wait to see if the symptoms improve because it is the feedback step of the experiment.
4786 Joules of heat are transferred to a 89.0 gram
sample of an unknown material, with an initial
temperature of 23.0°C. What is the specific heat of the
materialif the final temperature is 89.5 °C?
Answers
4786=0.089*66.5*c
c= 808.65 j/kg.C
The specific heat of the material is calculated using the formula for heat transfer Q = mcΔT, rearranged to find the specific heat 'c' = Q / (m * ΔT). In this scenario, given the provided values, the specific heat is approximately 0.81 J/g°C.
Explanation:In this question, you are asked to find the specific heat of a material. Specific heat refers to the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius. This is an intensive property of matter and is unique for each substance.
If we use the formula for heat transfer Q = mcΔT, where:
Q is the heat transferred (Joules) m is the mass (in grams) c is the specific heat (J/g°C) ΔT (delta T) is the change in temperature (°C)
Then, by rearranging the formula, the specific heat 'c' can be calculated using the formula c = Q / (m * ΔT).
In this case, the heat transferred Q is 4786 J, the mass m is 89.0 g, and the change in temperature ΔT is the final temperature minus the initial temperature (89.5°C - 23.0°C = 66.5°C).
Therefore, specific heat 'c' = 4786 J / (89.0 g * 66.5°C) = 0.81 J/g°C. Hence, the specific heat of the material is approximately 0.81 J/g°C.
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an
What happens to a molecule of liquid water when hydrogen bonds between atoms are broken?
O The liquid turns to a gas.
The liquid turns to a solid.
The liquid gains hydrogen atoms.
The liquid does not otherwise change.
Answers
Answer:
Your Answer is A: The Liquid turns to gas
Explanation:
To break hydrogen bonds you must add heat. When you add heat to water it turns into a gas. So therefore your answer is The Liquid Turns To A Gas.
12.
Which of these would you expect to be soluble in the nonpolar solvent hexane, C6H14?
A H2O
B. CH,
C Naci
D Sns,
Answers
Answer:
B. CH₄
Explanation:
The primary rule in deciding solubilities is, Like dissolves like. That is,
A polar solute dissolves in a polar solvent. A nonpolar solute dissolves in a nonpolar solvent.C₆H₁₄ is a nonpolar solvent. Its strongest intermolecular forces are London dispersion forces.
CH₄ is a nonpolar solute. It contains only nonpolar C-H bonds, and its strongest intermolecular forces are London dispersion forces.
Molecules of the two compounds can easily intermingle with each other because the attractive forces between them are so small.
A is wrong. H₂O is a highly polar substance. Its molecules are so strongly attracted to each other that they will not dissolve in the C₆H₁₄.
C and D are wrong. Both NaCl and SnS are compounds of a metal and a nonmetal. We would predict them to be ionic solids, at the extreme end of polarity. They will not dissolve in C₆H₁₄.
In the nonpolar solvent hexane, CH4 (methane) would be expected to be soluble based on the principle of 'like dissolves like'. Other given substances like H2O, NaCl and SnS2 will not dissolve well in hexane due to their polar ionic and network covalent nature respectively.
Explanation:Among the options given, the substance that would be expected to be soluble in the nonpolar solvent hexane (C6H14) is B. CH4 (methane). This is based on the principle of like dissolves like. Nonpolar solvents, like hexane dissolve nonpolar substances. Methane is a nonpolar substance and will therefore dissolve in hexane. Conversely, H2O (water) and NaCl (table salt) are polar and ionic compounds respectively and SnS2 is a network covalent compound so they will not dissolve well in a nonpolar solvent like hexane.
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How much heat is absorbed when 90.5 g of ice is heated from -11.0 °C to 145.0 °C?
Please show work ❤️
Answers
Answer:
Q(total) = 283Kj
Explanation:
5 Heat Transitions …
Specific Heats => c(s) = 0.50cal/g∙⁰C, c(l) = 1.0 cal/g∙⁰C, c(g) = 0.48 cal/g∙⁰C
Phase Transition Constants => ΔHᵪ = Heat of Fusion = 80 cal/g; ΔHᵥ = Heat of Vaporization = 540cal/g
Note => Phase change regions => no temp. change occurs when 2 phases are in contact (melting and evaporation). Only when single phase substance exists (s, l or g) does temperature change occur. See heating curve for water diagram. The increasing slopes are temperature change regions and heat flow is given by Q =mcΔT. The horizontal slopes are phase changes ( melting & evaporation) and heat flow for each of those regions is given by Q = m·ΔH. Each transition energy is calculated individually (see below) and added to obtain the total heat flow needed.
Q = mcΔT for temperature change regions of the heating curve (single phase only)
Q = m∙ΔH for phase transition regions of the heating curve (2 phases in contact)
Solid (ice) => Melting Pt => Q(s) = mcΔT = (90.5g)(0.50cal/g∙⁰C)(11⁰C) = 478 cal
Melting (s/l) => Liquid (water) => Q(s/l) = m∙ΔHᵪ = (90.5g)(80cal/g) = 7240 cal
Liquid (water) => Boiling Pt => Q(l) = mcΔT = (90.5g)(1.0cal/g∙⁰C)(100⁰C) = 9050 cal
Boiling (l/g) => Gas (steam) => Q(l/g) = m∙ΔHᵥ = (90.5g)(540cal/g) = 48,870 cal
Gas (steam) => Steam @ 145⁰C => Q(g = mcΔT = (90.5g)(0.48cal/g∙⁰C)(45⁰C) = 2036 cal
Total Heat Transfer (Qᵤ) = Q(s) + Q(s/l) + Q(l) + Q(l/g) + Q(g)
= 478cal +7240cal + 9050 cal + 48,870cal + 2036cal
= 67,674 cal x 4.184 j/cal = 283,148 joules = 283 Kj
how many atoms are present in 4 molecules of NaOH?
Answers
Answer:
The approximate molar mass of NaOH is 40 g/mol. You have 4 g NaOH.
No. of moles of NaOH is given by
n=(Given mass)/(Molar mass)
= 4/40 = 0.1 mol
1 mol has 6.022 × 10^23 molecules.
Thus, 0.1 mol has 6.022 × 10^23 × 0.1 molecules i.e. 6.022 × 10^22 molecules.
Explanation:
Final answer:
There are 12 atoms in 4 molecules of NaOH.
Explanation:
To determine the number of atoms in 4 molecules of NaOH, we must first understand the chemical formula of NaOH. NaOH consists of one sodium atom (Na), one oxygen atom (O), and one hydrogen atom (H). To calculate the total number of atoms, we multiply the number of molecules (4) by the number of atoms in each molecule (3). Therefore, there are 12 atoms in 4 molecules of NaOH.
Think about how you can use Le Chatelier’s principle to find possible solutions to the design problem. Describe at least two ways to increase the yield (amount) of ammonia based on this principle.
Answers
Answer:
1) Increasing the pressure.
2) Adding hydrogen gas.
Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.
For the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g):
1) Increasing the pressure:
When there is an increase in pressure, the equilibrium will shift towards the side with fewer moles of gas of the reaction. And when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.The reactants side (left) has 4.0 moles of gases and the products side (right) has 2.0 moles of gases.So, increasing the pressure will shift the reaction to the side with lower moles of gas (right side) that increase the yield (amount) of ammonia.
2) Adding hydrogen gas:
Adding hydrogen gas will increase the concentration of the reactants side, so the reaction will be shifted to the right side to suppress the increase in the concentration of hydrogen gas by addition that increase the yield (amount) of ammonia.Answer:
The La Chatelier's principle suggests that changes in the products of the design, we can increase the pressure of the equilibrium when we do this it will shift towards the side with fewer moles of gas of the reaction, and when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.
Then we can also add hydrogen gas, by doing this it will increase the concentration of the reactants side, so the reaction will be shifted to the right side to suppress the increase in the concentration of hydrogen gas by addition that increase the yield of ammonia.
Explanation:
Which one of the following is a decomposition reaction?
O A. N2 (9) + 3H2 (9) - 2NH3 (9)
O B. 4Fe (s) + 302 (9) - 2Fe203 (s)
O C. 2LIOH (s) + CO2 (g) - Li2CO3 (s) + H20 ()
O D. K2CO3 (s) - K20 (s) + CO2 (g)
Answers
Answer:
d
Explanation:
the answer because decomposition means breaking down or taking apart
Answer:
l
Explanation:
How does the paint on a car help to keep it from rusting?
•The paint acts as a catalyst.
•Paint decreases the temperature of the metal.
•Paint increases the surface area of the metal.
•Paint protects the metal from exposure to oxygen.
Answers
Answer:
option c
Explanation:
rusting is the formation of ferrousoxide on the orin this can be prevented by applying some paint on the surface
Answer:
Option-(C): Paint increases the surface area of the metal.Different machines and more over vehicles are painted for the reason of protecting it from any possible rusting. As there a number of rusting agents which are present all over the place, and they increase the chances of rust formation on the surface of the metal body.Just because the rust is the collection of unwanted and harmful agents (present on the unprotected or unpainted)surface of the machine) which tends to break the basic links or bonds between the different atoms or molecules, which results in a more deformed form of structure for the vehicle. The paint are there to have a defense line like mechanism for each of the vehicle, as it enhances the cars layers capacity to widen up and there is a lot of space for the actual body of the car to remain protected under the paint's layer.
When 9.6 grams of NaBr are dissolved in enough water to create a 165 gram solution what is the concentration expressed as a percent by mass
Answers
Answer:
5.8 %
Explanation:
% by mass = (mass of solute/mass of solution) × 100 %
Data:
Mass of NaBr = 9.6 g
Mass of solution = 165 g
Calculation:
% by mass = (9.6 g/165 g) × 100 % = 5.8 %
Answer:
The concentration of sodium bromide solution as a percent by mass is 5.82%.
Explanation:
Percent by Mass (w/w %) :
The percentage mass or fraction of mass of the of solute present in total mass of the solution.
[tex]w/w\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100[/tex]
Mass of solute that is sodium bromide = 9.6 g
Mass of the solution prepared = 165 g
The concentration of solution as a percent by mass:
[tex]\frac{9.6 g}{165 g}\times 100=5.82\%[/tex]
what does the field of thermodynamics relate to
A-changes in nuclear reactions
B- changes in energy in systems
C changes in molecular structure
D changes in atomic properties
Answers
Answer:
B. Changes in energy in systems.
Explanation:
Thermodynamics is a branch of physics which deals with heat and temperature in relation to energy work radiation and characteristics of matter.
This field studies the causes of energy changes and the effects of energy changes to chemical and physical systems.
Thermodynamics relates B) changes in energy in systems.
Explanation:Thermodynamics is the part of material science that manages warmth and temperature, and their connection to energy, work, radiation, and properties of issue. The conduct of these amounts is administered by the four laws of thermodynamics which pass on a quantitative depiction utilizing quantifiable naturally visible physical amounts, yet might be clarified as far as tiny constituents by factual mechanics.
Thermodynamics applies to a wide assortment of subjects in science and building, particularly physical science, concoction designing and mechanical designing, yet in addition in fields as intricate as meteorology.
How many g of ice at 0 degrees celsius will be melted to water at 0 degrees celsius if the ice absorbs 20000 calories?
Answers
Answer:
250 gm
Explanation:
Latent heat of ice=80 calories /g
ice=20000÷80=250 gm
KMnO4
Assign oxidation numbers to each element in this compound.
Answers
K=+1
Mn= +7
O= -2
That’s it!!!
The oxidation number of each element in the compound are:
1. The oxidation number of K is +1
2. The oxidation number of O is –2
3. The oxidation number of Mn is +7
The oxidation number of certain elements are constant while others varies.
The oxidation number of potassium, K is always +1The oxidation number of oxygen, O is always –2 except in peroxides where it is –1Manganese, Mn has variable oxidation number. Thus, we shall determine the oxidation number of Mn in the compoundThe oxidation number of Mn in KMnO₄ can be obtained as follow:
KMnO₄ = 0 (ground state)
K = +1
O = –2
Mn = ?KMnO₄ = 0
K + Mn + 4O = 0
1 + Mn + 4(–2) = 0
1 + Mn – 8 = 0
Collect like terms
Mn = 0 + 8 – 1
Mn = +7Therefore, the oxidation number of Mn in KMnO₄ is +7
SUMMARY
1. The oxidation number of K is +1
2. The oxidation number of O is –2
3. The oxidation number of Mn is +7
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The (C6H14)2NH molecule represents a ----- amine.
Primary
Secondary
Tertiary
Answers
Answer:
Secondary .
Explanation:
Primary amine contains only one alkyl group.
Secondary amine contains two alkyl groups.
Tertiary amine contains three alkyl groups.
Since (C₆H₁₄)₂NH contains 2 alkyl groups.So, it is secondary amine.
Answer:
Secondary
Explanation:
Because of this amount of hydrogens being substituted, we can classify the amines in primary (R-NH2), secondary (R1R2NH) and tertiary (R1R2R3N) amines. In the primary amines, only one of the hydrogens is replaced by an organic radical, for example, in the following CH3 - NH2 molecule, in the secondary we have the substitution of two hydrogen atoms, as in the case of CH3 - NH - CH3 and in the tertiary all are replaced.
In the molecule (C6H14) 2NH, the bold part shows the substitution of two hydrogen, so we can classify the molecule as a secondary amine.
How many double bonds in the molecule ch3chchc(0)ch3 ?
Answers
Answer:
2.
Explanation:
Kindly, find the attached image:there are 2 double bonds in this molecule:
one between CH and CH.The other between Ca and O in the carbonyl group.How should the table be changed to correctly
distinguish between mechanical and electromagnetic
waves?
Earth
Earthquake waves and radiation waves need to
change places.
Light waves and X-ray waves need to change
places
Ocean waves and X-ray waves need to change
places.
Sound waves and light waves need to change
places.
Answers
Answer:
Sound waves and light waves need to change places.
Explanation:
The electromagnetic spectrum has 7 different types of waves with wave different wave lengths and frequencies. They include radio waves, micro waves, infrared eradication, visible light, ultraviolet, xrays, and gamma rays. They do not require a medium of air or water. Mechanical waves need air and water to spread.
Answer: Sound waves and light waves need to change
Explanation:-
Electromagnetic waves are waves which can travel through the vacuum. electromagnetic waves have electrical and magnetic component associated with them. They all travel with the speed of light.The energy transport through a medium involves the absorption and re emission of the wave energy by the atoms of the material. Example: Light waves, X rays, Radiation waves
Mechanical waves require a medium to travel so that they can transport their energy from one location to another. Example: Ocean waves, sound waves , Earthquake waves
Thus light waves are electromagnetic waves and sound waves are mechanical waves and thus should exchange places.
Leslie wants to know which advertising medium works best to promote her electronics store. She surveys her customers over a weekend and creates a bar graph.
Based on her survey, which advertising mediums will work best to publicize Leslie’s in-store specials?
newspaper and printed flyers
radio and TV
radio and Internet
printed flyers and Internet
Answers
answer: radio and tv
13,000. cm has how many significant figures?
Answers
Answer:
since there is a decimal point at the end, they are all significant figures so the answer is 5
There are 5 significant figures in 13,000. cm(centimeters).
What is significant figures?Significant figures are often the sequence of data that add to the correctness of a value, frequently a measurement.
What is cm(centi-meter)?The length of an entity is usually measured in centimeters, which are metric units of measurement.
There are 5 significant figures in 13,000. cm(centimeters).
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6. Which of the following statements correctly describes what happens to the diaphragm during an
inhalation, when the lungs inflate?
O A. The diaphragm returns to its resting state.
O B. The diaphragm contracts and flattens.
O C. The diaphragm only moves during exhale.
O D. The diaphragm expands.
Answers
As the diaphragm contracts and flattens, it increases the volume of the thorax where the lungs are located. This results in a decrease in pressure (Boyle’s Law, if you know it) that creates a pressure gradient from outside to inside. This is what causes air to move into the lungs.
Answer:
O B. The diaphragm contracts and flattens.
Explanation:
The diaphragm is a skeletal striated muscle that separates the abdominal cavity from the thoracic cavity, has a dome shape and plays a key role in breathing. Locate near the lumbar vertebrae, the lower ribs and the sternum and can be divided according to its location into three parts: sternal, costal and lumbar.
During inhalation, the diaphragm contracts and flattens, reducing the pressure inside the chest and compressing the viscera of the abdomen, which facilitates the entry of air into the lungs.
At the expiration, the inverse process occurs: it relaxes and rises, increasing the pressure inside the chest and expelling air from the lungs.
What must be true about two objects if heat is flowing between them?
Answers
Answer:
The temperatures of the objects must be different
Explanation:
if heat is flowing between two objects, then the objects must be at different temperatures.
Answer:
The have to different temperature
Explanation:
A new pesticide has been introduced to the habitat of this population of beetles.
Which describes the effect of this environmental change?
decreased genetic variation
increased genetic variation
genetic drift
gene flow
Answers
Answer:
The correct answer is "decreased genetic variation".
Explanation:
By introducing a new pesticide into the habitat of a beetle population what happens is that there will be a decrease in the genetic variation in this population. This is due to the harmful effect that pesticides have on insects and other living beings.
Have a nice day!
A new pesticide has been introduced to the habitat of this population of beetles. The effect of this environmental change is decreased genetic variation and the correct option is option 1.
What are Pesticides?Pesticides are chemical substances that are meant to kill pests. In general, a pesticide is a chemical or a biological agent such as a virus, bacterium, antimicrobial, or disinfectant that deters, incapacitates, kills, pests.
By their nature, pesticides are potentially toxic to other organisms, including humans, and need to be used safely and disposed of properly. They are among the leading causes of death by self-poisoning, and this burden is felt disproportionately in low- and middle-income countries.
Therefore, A new pesticide has been introduced to the habitat of this population of beetles. The effect of this environmental change is decreased genetic variation and the correct option is option 1.
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According to Coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?
Answers
Answer:
there would be more charge in it
Explanation:
Odd one out:
a) CH3COOH
c) CuSO4
b) NaOH
d) H2SO,
Answers
what are the coefficients to balance the following equation?
ba+br2=babr2
Answers
1 ba on each side. 2 br on each side. Coefficient for all of them is 1.
The coefficients to balance the given equation [tex]Ba + Br_2 \to BaBr_2[/tex] are [tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex] ,respectively.
Coefficients are used to balance chemical equations, ensuring that the number of atoms of each element is the same on both sides of the equation. Or a coefficient is a numerical value placed in front of a chemical formula or compound to indicate the relative number of molecules or atoms involved in a reaction.
To balance the chemical equation [tex]Ba + Br_2 \to BaBr_2[/tex] , we need to ensure that the number of atoms of each element is the same on both sides of the equation.
Here are the coefficients needed to balance the equation:
[tex]Ba + Br_2 \to BaBr_2[/tex]
[tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex]
Therefore, the coefficients to balance the given equation are:
[tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex].
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Which of the following is true about the speed of light?
It depends on the wavelength.
Answers
Answer: The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength.
Explanation:
Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength. That number, also known as the frequency, will be larger for a short-wavelength wave than for a long-wavelength wave.
Answer:
It is a constant when the light is traveling in a vacuum.
Explanation: