They would form a single covalent bond and become Br2.
They would become a covalent bond and become Br2.
the steps of the scientific method in order are (3 points) Purpose, Experiment, Hypothesis, Analysis, Conclusion Purpose, Hypothesis, Experiment, Analysis, Conclusion Hypothesis, Experiment, Analysis, Conclusion Purpose, Hypothesis, Experiment, Conclusion
Answer:
second one
Explanation:
How many double bonds in the molecule ch3chchc(0)ch3 ?
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 many g of ice at 0 degrees celsius will be melted to water at 0 degrees celsius if the ice absorbs 20000 calories?
Answer:
250 gm
Explanation:
Latent heat of ice=80 calories /g
ice=20000÷80=250 gm
Which of these expressions are correct variations of the Combined Gas Law? P1V1T2 = P2V2T1 both
Answer:
Explanation:
The combined gas law is also known as general gas law and it is the reduction of the ideal gas equation. In the combined gas law, we assume that n= 1
From PV=nRT
[tex]\frac{PV}{T}[/tex] = R (constant) if n= 1
∴ [tex]\frac{P_{1} V_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2} V_{2} }{T_{2} }[/tex] = [tex]\frac{P_{n} V_{n} }{T_{n} }[/tex]
Answer: Both!
Explanation:
Solution F has a pH of 11, and Solution G has a pH of 13.
How does the concentration of hydroxide ions in Solution F differ from Solution G?
Solution G has three times as many hydroxide ions as Solution F.
Solution G has 100 times more hydroxide ions than Solution F.
Solution F has 100 times more hydroxide ions than Solution G.
Solution F has three times as many hydroxide ions as Solution G.
Answer:
Solution G has 100 times more hydroxide ions than Solution F.
Explanation:
∵ pH + pOH = 14.
∴ pOH = 14 - pH.
For solution F:
pOH = 14 - pH = 14 - 11 = 3.
∵ pOH = -log[OH⁻] = 3.
∴ [OH⁻] = 0.001 M.
For solution G:
pOH = 14 - pH = 14 - 13 = 1.
∵ pOH = -log[OH⁻] = 1.
∴ [OH⁻] = 0.1 M.
∴ [OH⁻] of solution G / [OH⁻] of solution F = (0.1)/(0.001) = 100.
So, Solution G has 100 times more hydroxide ions than Solution F.
the concentration of the radio active isotope potassium-40 in a rock sample is found to be 6.25%. what is the age of the rock
Answer:
5.0 x 10⁹ years.
Explanation:
It is known that the decay of a radioactive isotope isotope obeys first order kinetics.Half-life time is the time needed for the reactants to be in its half concentration.If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).Also, it is clear that in first order decay the half-life time is independent of the initial concentration.The half-life of K-40 = 1.251 × 10⁹ years.For, first order reactions:k = ln(2)/(t1/2) = 0.693/(t1/2).
Where, k is the rate constant of the reaction.
t1/2 is the half-life of the reaction.
∴ k =0.693/(t1/2) = 0.693/(1.251 × 10⁹ years) = 5.54 x 10⁻¹⁰ year⁻¹.
Also, we have the integral law of first order reaction:kt = ln([A₀]/[A]),
where, k is the rate constant of the reaction (k = 5.54 x 10⁻¹⁰ year⁻¹).
t is the time of the reaction (t = ??? year).
[A₀] is the initial concentration of (K-40) ([A₀] = 100%).
[A] is the remaining concentration of (K-40) ([A] = 6.25%).
∴ (5.54 x 10⁻¹⁰ year⁻¹)(t) = ln((100%)/( 6.25%))
∴ (5.54 x 10⁻¹⁰ year⁻¹)(t) = 2.77.
∴ t = 2.77/(5.54 x 10⁻¹⁰ year⁻¹) = 5.0 x 10⁹ years.
Answer:
[tex]\boxed{4.99 \times10^{9} \text{ y}}[/tex]
Explanation:
The half-life of potassium-40 (1.248 ×10⁹ y) is the time it takes for half of it to decay.
After one half-life, half (50 %) of the original amount will remain.
After a second half-life, half of that amount (25 %) will remain, and so on.
We can construct a table as follows:
[tex]\begin{array}{cccc}\textbf{No. of} & &\textbf{Fraction} &\textbf{Percent}\\ \textbf{Half-lives} & \textbf{t/(10$^{9}$ y}) &\textbf{Remaining} &\textbf{Remaining}\\0 & 0 & 1 & 100\\\\1 & 1.248 & \dfrac{1}{2} & 50\\\\2 & 2.496 & \dfrac{1}{4} & 25\\\\3 & 3.744 & \dfrac{1}{8} & 12.5\\\\4 & 4.992 & \dfrac{1}{16} & 6.25\\\\5 & 6.240 & \dfrac{1}{32} & 3.125\\\\\end{array}[/tex]
We see that after four half-lives, ¹/₁₆ or 6.25 % of the original mass remains.
Conversely, if 6.25 % of the sample remains, the age of the sample must be four half-lives.
[tex]\text{Age of rock} = 4 \times 1.248 \times 10^{9}\text{ y}= \boxed{\mathbf{4.99 \times 10^{9}} \textbf{ y}}[/tex]
13,000. cm has how many significant figures?
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).
To know more about significant figures and centimeters
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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...):
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! :)
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
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.
Which one of the following is a balanced equation?
O A. 2NH3 (g) + 3Mg (s) - 3H2 (g) + Mg3N2 (s)
OB. 4NH3 (9) + Mg(s)* - H2(g) + Mg3N2 (s)
OC. NH3 (9) + Mg (s) - H2 (9) + Mg3N2 (s)
O D. Ca (s) + 02 (9) - 2Cao (s)
Answer: OA is a balanced equation.
Explanation: For an equation to be balanced, the number of atoms and the total charge of each element in the reaction, of the product and reactant side must be the same.
Considering OA; 6 atoms of nitrogen is present in the reactant side. Shifting to the product side, 6 atoms of nitrogen is also present. Taking the other element in the reaction into account, the number of atoms of each element balances on both sides.
ANSWER:
The correct answer is OA. 2NH3 (g) + 3Mg (s) →3H2 (g) + Mg3N2 (s)
The Equation; 2NH3 (g) + 3Mg (s) →3H2 (g) + Mg3N2 (s), is a balanced chemical equation.
FURTHER EXPLANATION;
According to the law of conservation of mass, all chemical equations should be written such that the mass of the reactants is equal to the mass of the products.
This is done by balancing the chemical equation.
Balancing of chemical equations is a try and error method that makes sure the number of atoms of each element in a chemical equation are equal on the side of the reactants and that of products.
The equation; 2NH3 (g) + 3Mg (s) →3H2 (g) + Mg3N2 is said to be balanced since the number of atoms of each element are equal on both side of the equation.
That is; 2 atoms of nitrogen, 6 atoms of hydrogen and 3 atoms of magnesium on both side of the equation.
Choice OB is incorrect because, the equation 4NH3 (g) + Mg(s)* - H2(g) + Mg3N2 (s) is not balanced as the number of nitrogen atoms and that of hydrogen atoms are not equal on both side of the equation.(4 nitrogen atoms on the reactant side and 2 nitrogen atoms on the product side, 12 hydrogen atoms on the reactant side and 2 hydrogen atoms on the product side).
Choice OC is incorrect because, the equation, NH3 (g) + Mg (s) - H2 (g) + Mg3N2 (s) is not balanced as the number of nitrogen atoms, magnesium atoms and that of hydrogen atoms are not equal on both side of the equation.(1 nitrogen atom on the reactant side and 2 nitrogen atoms on the product side, 3 hydrogen atoms on the reactant side and 2 hydrogen atoms on the product side, 1 magnesium atom on the reactant side and 3 magnesium atom on the product side).
Choice OD is incorrect because, the equation Ca (s) + 02 (9) - 2Cao (s) is not balanced as the number calcium atoms is not the same on both side of the equation, 1 calcium atom on the reactant side and 2 calcium atoms on the product side.
A 5.000 g sample of Niso4 H2O decomposed to give 2.755 g of anhydrous NiSO4.
What is the formula of the hydrate?
What is the full chemical name for the hydrate?
What is the molar mass of the hydrate? NiSO4•_H2O
What is the mass % of water in the hydrate?
Answer:
a) 7.0.
b) Nickel sulfate hepta hydrate.
c) 280.83 g/mol.
d) 44.9%.
Explanation:
a) What is the formula of the hydrate?
The mass of the hydrated sample (NiSO₄.xH₂O) = 5.0 g,
The mass of the anhydrous salt (NiSO₄) = 2.755 g,
The mass of water = 5.0 g - 2.755 g = 2.245 g.
∴ no. of moles of water = mass/molar mass = (2.245 g)/(18.0 g/mol) = 0.1247 mol.
∴ no. of moles of anhydrous salt (NiSO₄) = mass/molar mass = (2.755 g)/(154.75 g/mol) = 0.0178 mol.
∴ water of crystallization in the sample (x) = no. of moles of water/no. of moles of anhydrous salt (NiSO₄) = (0.1247 mol)/(0.0178 mol) = 7.0.
b) What is the full chemical name for the hydrate?
The name of the salt (NiSO₄.7H₂O) is Nickel sulfate hepta hydrate.
c) What is the molar mass of the hydrate?
(NiSO₄.7H₂O)
The molar mass = molar mass of NiSO₄ + 7(molar mass of H₂O) = (154.75 g/mol) + 7(18.0 g/mol) = 280.83 g/mol.
d) What is the mass % of water in the hydrate?
The mass % of water = (mass of water)/(mass of hydrated sample) x 100 = (2.245 g)/(5.0 g) x 100 = 44.9%.
Please help me I’ll give brainliest
Consider the molecules HCl, HBr, HF, and HI. Which would you expect to have the highest boiling point, and why?
HBr, because it has the highest mass and the most electrons.
HCl, because it experiences hydrogen bonding.
HF, because it has the strongest intermolecular force.
HI, because it experiences ion-dipole forces.
Answer: A
Explanation: Boiling point increases with the rise of electrons.
Answer:
Not sure what the answer is, but it's not A.
Explanation:
Submitted the problem and A was incorrect.
Answer:
What is the density of an object that has a mass of 10 g and a volume
of 5 mL?
a. 0.5 g/ mL
b. 2 g/mL
c. 15 g/ mL
d. 50 g/ mL
Answer:
b. 2 g/mL
Explanation:
Density=mass/volume.
so: D=10g/5mL
Density=2g/mL
Answer:
The correct answer is option b.
Explanation:
To calculate density of a substance, we use the equation:
[tex]\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}[/tex]
We are given:
Mass of an object = 10 g
Volume of an object = 5 mL
Density of an object = d
Putting values in above equation, we get:
[tex]d=\frac{10 g}{5 mL}=2 g/mL[/tex]
2 g/mL is the density of an object that has a mass of 10 g and a volume of 5 mL.
How much heat is absorbed when 90.5 g of ice is heated from -11.0 °C to 145.0 °C?
Please show work ❤️
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
What must be true about two objects if heat is flowing between them?
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:
0.0045 cm or 0.0045 in. Larger quantity
Hello There!
0.0045 Inches are larger than centimeters.
identify the branch of chemistry.
percentage purity of glucose.
Answer:
1. There are many branches of chemistry or chemistry disciplines. The five main branches are organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry.
2. 25mg
The question regarding the percentage purity of glucose falls under the domain of analytical chemistry, a branch of chemistry focused on analyzing substances to ascertain their composition and purity. It involves calculating the ratio of the pure substance's mass to the sample's total mass and converting this into a percentage.
Explanation:The question about identifying the percentage purity of glucose pertains to the branch of chemistry known as analytical chemistry. This field is crucial for quantitatively and qualitatively analyzing substances to determine their composition and purity. To find the percentage purity of a sample, one would typically use the formula:
%purity = (mass of compound / mass of sample) × 100
For instance, if you're analyzing glucose, you'll first need to determine the total mass of the glucose sample you're evaluating. After that, you conduct an experiment or analysis to ascertain the mass of pure glucose within that sample. Once you have both values, you substitute them into the equation to calculate the percent purity of the glucose. This allows chemists to ensure that the concentration of glucose or any other substance is within the required specifications for its intended use, whether that be for consumption, industrial applications, or research.
Such analysis is vital for ensuring the safety and effectiveness of products, maintaining quality control, and complying with legal standards for purity and composition.
APPLYING SKILLS #1 & #2: Calculating the percentage yield
5.75g of sodium is reacted with chlorine to produce sodium chloride.
If the actual yield is 10.2g, calculate the percentage yield. Leave your
answer to 3 significant figures (4 marks)
2Na + Cl2 → 2Naci
Answer:
69.8 %.
Explanation:
2Na + Cl2 = 2NaCl
Using Relative Atomic Masses:
2*22.99 g sodium should produce 2*(22.99 + 35.45) = 116.88 g of sodium chloride
So 5.75 g Na should give 116.88 * 5.75 / 2*22.99 g = 14.62 g NaCl
% yield = 10.2 / 14.62 = 69.8%.
2Na + Cl2 = 2NaCl
Using Relative Atomic Masses:
2×22.99 g sodium should produce 2×(22.99 + 35.45) = 116.88 g of sodium chloride
So 5.75 g Na should give 116.88 ×5.75 / 2×22.99 g = 14.62 g NaCl
percentage yield = 10.2 / 14.62 = 69.8%.
Sodium chloride is the chemical name for salt. Sodium is an electrolyte that regulates the amount of water in your body. Sodium also plays a part in nerve impulses and muscle contractions.
What is sodium chloride used for?Sodium chloride is an essential nutrient and is used in healthcare to help prevent patients from becoming dehydrated. It is used as a food preservative and as a seasoning to enhance flavor.
Sodium chloride is also used in manufacturing to make plastics and other products. It is also used to de-ice roads and sidewalks.
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You completed three terra-forming trials. Describe how the suns mass affects planets in a solar system. Use the data your recorded to support your conclusions
Answer:
The suns mass affects the planets in the solar system because the grater the mas the stronger the gravitaional pull so the saster the planet orbits the sun.
Explanation:
Suns mass directly affected the position of planets in the solar system.
What is the effect of mass of sun?If the mass of the Sun is increased, the Sun would exert a stronger gravitational force on materials present around it. This change in mass of sun would disturb the orbits of all of the planets, pulling them closer to it.
So we can conclude that suns mass directly affected the position of planets in the solar system.
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Which letter represents the activated complex?
1. A
2. B
3. F
4. G
Answer:
2. B.
Explanation:
The letter B represents the activated complex.The activated complex is the intermediate that is formed between the states of reactants "F" and products "G".Letter A represents the activation energy of the reaction, that is the difference in potential energy between the reactants "F" and activated complex "B".Letter C represents the enthalpy change of the reaction, that is the difference in potential energy between products "G" and reactants "F".Letter D represents the potential energy of products "G".Letter E represents the potential energy of reactants "E".Answer:
2. B on EDG 2020
Explanation:
Got it Right :)
the molarity of a vinegar solution is 0.90m. calculate the nimber of acetic acis moles is 10 ml of the solution
Answer:
0.009 mol.
Explanation:
Molarity (M) is defined as the no. of moles of solute dissolved in a 1.0 L of the solution.M = (no. of moles of acetic acid)/(Volume of the solution (L)).
M = 0.9 M, Volume of the solution = 10.0 mL = 0.01 L.
∴ no. of moles of acetic acid = (M)(Volume of the solution (L)) = (0.9 M)(0.01 L) = 0.009 mol.
Answer:
The number of acetic acid moles is 0.0090 in 10 ml of the solution.
Explanation:
[tex]Molarity=\frac{Moles}{Volume (L)}[/tex]
Let the moles acetic acid in vinegar be n.
Molarity of the vinegar solution = 0.90 M
Volume of the vinegar solution = 10 mL = 0.010 L
1 mL = 0.001 L
[tex]0.90M=\frac{n}{0.010 L}[/tex]
[tex]n=0.90 M\times 0.010 L=0.0090 mol[/tex]
The number of acetic acid moles is 0.0090 in 10 ml of the solution.
Which best describes nuclear fission?
O A nucleus spontaneously splits and absorbs energy,
O Two nuclei spontaneously combine and absorb energy,
O A nucleus collides with a neutron and splits, releasing energy.
Nuclei combine to form a heavier nucleus, releasing energy
Nuclear fission is a nuclear reaction where a nucleus absorbs a neutron and splits into two smaller nuclei, releasing energy and more neutrons, which can cause a chain reaction. It's used in nuclear reactors and nuclear weapons.
Nuclear fission is the process in which a nucleus absorbs a neutron and splits into two lighter nuclei, known as fission fragments, releasing a significant amount of energy. This reaction is exothermic, meaning it releases energy in the form of heat, gamma rays, and the kinetic energy of additional neutrons.
These free neutrons may go on to induce fission in other nuclei, creating a chain reaction. A critical aspect of fission is that a minimum amount of fissile material, known as the critical mass, is necessary for a sustained chain reaction to occur. Therefore, the correct option that describes this process is 'A nucleus collides with a neutron and splits, releasing energy.'
The enormous energy release from fission makes it the foundational principle behind nuclear reactors and nuclear weapons. The fission of heavy elements like uranium or plutonium is harnessed as a heat source in nuclear power plants to produce electricity or to drive explosive reactions in atomic bombs.
Answer:
D : Nuclei combine to form a heavier nucleus, releasing energy.
Explanation:
Nuclear fusion is a process by which two or more atomic nuclei combine to form one or more different atomic nuclei and subatomic particles. The nuclei usually involved are deuterium and tritium, which are hydrogen variants. The difference in mass between the reactants and products is manifested as either the release or absorption of energy. Fusion reactions take place in a state of matter called plasma, which is a hot, charged gas made of positive ions and free-moving electrons. Fusion reactions release massive amounts of energy, and this is the same process that powers the sun
Assigning Oxidation Numbers
QUICK CHECK
What are the oxidation numbers of the atoms in this reaction?
Check all that apply.
Mg(s) + 2HCl(aq) - MgCl2(aq) + H2(g
Mg = 0
H =+1
Cl= -1
Mg= +2
Cl=-1
H= 0
Answer:
B,C,D,E
Explanation:
Edge
Which of these elements is a metal?
Answer:
The options are missing, so I will answer the question in a general manner.
This group of elements includes the alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides and actinides. Depending on conditions, elements belonging to the metalloid group may behave like metals. So, if you want to know if an element is a metal, just found it in the periodic table.
When bonding with nonmetals in ionic compounds, they are converted into cations. When bonding together they make metallic compounds. When multiple metals bound they form alloys (these can include nonmetals too).
Which term describes something that changes during an experiment?
Answer:
Dependent variable
Explanation:
Answer:
A variable
Explanation:
A variable is data that changes, two examples are an independent variable and a dependent variable.
what is the popular use of lithium batteries
Answer:
Lithium batteries are well-known for powering our phones and the latest lightweight laptop computers.
Lithium batteries are popular because they are lightweight, provide a stable voltage, are long-lasting, and are capable of delivering a high amount of current, making them suitable for a variety of applications from consumer electronics to electric vehicles and medical devices.
Lithium batteries are among the most popular types of rechargeable batteries used today. They are commonly found in a wide range of portable electronic devices. Here are some key details about their use and why they are so popular:
Portable Electronic Devices: Lithium-ion batteries are widely used in devices such as smartphones, laptops, tablets, and digital cameras because of their ability to provide a large amount of current and maintain a nearly constant voltage as they discharge.Electric Vehicles: These batteries are also crucial in the development of electric and hybrid vehicles. They offer a high energy density, meaning they can store and release a large amount of energy per unit mass, which is essential for the range and performance of electric cars.Medical Devices: Specialized lithium-iodide batteries are used in long-life, critical medical devices such as pacemakers. These batteries are designed to last 15 or more years, providing reliable power over long periods.Lightweight and Rechargeable: One of the main advantages of lithium-ion batteries is their lightweight nature, which makes them ideal for portable devices. Additionally, they are rechargeable, which means they can be used multiple times, reducing the need for disposable batteries.Slow Self-Discharge: Lithium batteries have a slow self-discharge rate, which means they retain their charge even when not in use, making them convenient for devices that are used intermittently.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
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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how many atoms are present in 4 molecules of NaOH?
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.
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
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.
Which state of matter is highly compressible, is made of particles moving independently of each other, and is present in large quantities near Earth’s surface?
Answer:
GAS
Explanation:
Answer:
Gas
Explanation:
The gaseous state of matter is highly compressible. According to the kinetic theory of matter, in the gaseous state, gas molecules largely move independent of each other and experience very little intermolecular forces between them.
Gases are abundant in the atmosphere near the earth's surface.