A student shines a flashlight on a mirror.
What happens to the light?
O A. The light is reflected by the mirror.
OB. The light is absorbed by the mirror.
O C. The light travels around the mirror.
OD. The light travels through the mirror.

Answer:

Regulation of body temperature

Explanation:

The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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For a science student to be successful in separating a mixture of two substances in the liquid state using distillation, the boiling points of the two liquids should be significantly different.

In distillation, a mixture of liquids is heated, and the vapor produced is condensed and collected. The liquids in the mixture will have different boiling points, so the substance with the lower boiling point will vaporize and condense at a lower temperature compared to the substance with the higher boiling point.

For a successful distillation, it is important that the boiling points of the two liquids are significantly different so that they can be separated easily. If the boiling points of the two liquids are too close, it will be difficult to separate them using distillation.

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The balanced chemical equation is one that represents the same number of atoms on both the reactant and product sides of the reaction. The coefficients provide the ratios of the substances that react and form in the reaction.

The procedure for balancing a chemical equation is as follows:

Step 1: Write the unbalanced chemical equation for the reaction.

Step 2: Determine the number of atoms of each type present on the reactant and product sides of the chemical equation.

Step 3: To achieve an equal number of atoms of each element on the left and right sides of the equation, introduce coefficients.

Step 4: Verify that the chemical equation is balanced by counting the atoms of each element on each side of the equation.

Examples of balanced chemical equations are:4Fe + 3O2 → 2Fe2O3C2H2 + 3O2 → 2CO2 + H2O2Na + Cl2 → 2NaCl.

Therefore, the correct answers are 4Fe + 3O2 → 2Fe2O3, C2H2 + 3O2 → 2CO2 + H2O, and 2Na + Cl2 → 2NaCl.

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The variable of the type of plant must be held constant in order to determine the ideal amount of sunlight. Therefore, option (C) is correct.

A variable can be defined as an alphabet that is used to represent an unknown number. Variable represents the value. A variable can be defined as a quantity that may be changed according to the mathematical problem.

The dependent variable can be described as a variable that depends on the value of some other number. The dependent variable can be defined as the output of a function. If the value of the dependent variable changes then there will be a change in the value of the independent variable.

The independent variable does not depend on the values of other variables and is called the input of a function. The value of the independent variable is not affected by any values of a variable.

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An accurate step in the procedure to name a binary molecular compound using IUPAC nomenclature rules is to; End the name of the second element with the suffix-ided.

What is IUPAC ?

The International Union of Pure and Applied Chemistry is reffered as IUPAC. It is a global scientific organization that establishes guidelines for chemical nomenclature, terminology, measurements, and symbols. IUPAC also publishes international recommendations for chemical safety and environmental protection and provides guidance on the use and application of chemical research.

What does Binary means?

Binary is a base-two number counting, calculating, and representation system. This means that, unlike the decimal system (base 10), which counts in tens, binary counts in powers of two. Binary numbers are made up of only two digits, 0 and 1, and each digit is known as a "bit." Binary is used to represent data and perform calculations in computing and electronic systems.

Therefore the correct option is C. End the name of the second element with the suffix-ided.

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Answer: the answer is D the 7

Explanation:

It has picture

The correct answer is option d. γ

A gamma-ray is electromagnetic radiation of the shortest wavelength and highest energy. Gamma-ray radiation has wavelengths generally smaller than a few tenths of an angstrom (10−10 meters), and gamma-ray photons have energies greater than tens of thousands of electron volts.

As previously indicated, large unstable atoms become more stable by emitting radiation to get rid of excess atomic energy (radioactivity). This radiation can be emitted in the form of positively charged alpha particles, negatively charged beta particles, gamma rays, or x-rays.

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The decay of manganese-50 nucleus will lead to the production of chromium-50 by positron emission.

Positron emission is a type of radioactive decay in which a proton in the nucleus is converted into a neutron, and a positron (a positively charged electron) is emitted. This type of decay occurs in nuclei that have a proton-to-neutron ratio that is too low.

In the case of chromium-50 production, the parent nucleus that undergoes decay is manganese-50. Manganese-50 has 25 protons and 25 neutrons, giving it a 1:1 proton-to-neutron ratio. By undergoing positron emission, one of the protons in the nucleus is converted into a neutron, and a positron is emitted. This results in the production of a new nucleus, chromium-50, which has 24 protons and 26 neutrons, giving it a 24:26 proton-to-neutron ratio.

Therefore, the decay of manganese-50 by positron emission leads to the production of chromium-50.

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The shape of a molecule is determined by the repulsion among not only the bonding electron groups but also the non-bonding (lone pair) electron groups. Both types of electron groups contribute to the overall geometry of the molecule and influence its shape. The given statement is false.

In a molecule, the shape is influenced by the arrangement of electron groups around the central atom. These electron groups can be either bonding pairs (resulting from shared electron pairs in covalent bonds) or non-bonding pairs (also known as lone pairs).

The repulsion between electron groups determines the geometry of the molecule. According to VSEPR (Valence Shell Electron Pair Repulsion) theory, electron groups try to position themselves as far apart as possible to minimize repulsion and achieve the most stable arrangement.

In determining the molecular shape, both the repulsion among bonding electron groups and the repulsion between bonding and non-bonding electron groups are considered. Non-bonding electron pairs exert a stronger repulsion compared to bonding electron pairs. Therefore, the presence of lone pairs can affect the overall molecular shape by altering the bond angles and influencing the arrangement of atoms in the molecule.

Hence, to accurately determine the shape of a molecule, it is essential to consider both the repulsion among bonding electron groups and the influence of non-bonding (lone) electron pairs.

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The true statement about the given organic compound CH3—CH2—C≡C—CH3 is "3) [B, D] - 3-pentyne and has geometric isomers."

The compound is 3-pentyne because it contains a triple bond between the second and third carbon atoms. Additionally, due to the presence of the triple bond, the compound can exhibit geometric isomers, meaning there can be different spatial arrangements of the atoms around the triple bond. Therefore, the correct statement is indeed 3) [B, D] - 3-pentyne and has geometric isomers.

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The organic compound CH3—CH2—C≡C—CH3 is 3-pentyne, an unsaturated compound. It is not an alkene and does not have geometric isomers. Therefore, options [B, C] are true.

The organic compound CH3—CH2—C≡C—CH3 is commonly known as 3-pentyne, as indicated by choice B. It is not an alkene (choice A); rather, it is an alkyne because it contains a triple bond. This triple bond further signifies that the compound is unsaturated (choice C), meaning it has the ability to form additional bonds. However, this compound does not have geometric isomers (choice D) because geometric isomerism requires the presence of a double bond, something 3-pentyne does not have. Therefore, the correct answer is option 1)

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A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.

Hence, Option B is correct answer.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Thus from the above conclusion we can say that A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.

Hence, Option B is correct answer.

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Answer:

The liquid state sometimes is described simply as the state that occurs between the solid and gaseous states. Some examples of liquids are:

- Water

- Milk

- Vinegar

Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire available volume like a gas. Some examples of solids are:

- Rocks

- Brick

- Coin

What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. Some examples of gases are:

- Helium

- Oxygen

- Neon

To calculate the maximum wavelength of light for which a carbon-chlorine single bond could be broken by absorbing a single photon, we need to use the energy and wavelength relationship for photons.

The equation is: E = h * c / λ
where E is the energy required to break the bond (in joules), h is Planck's constant (6.626 x 10^-34 Js), c is the speed of light (3.0 x 10^8 m/s), and λ is the wavelength (in meters).
First, we need to convert the energy from kJ/mol to J/photon. There are 6.022 x 10^23 photons in a mole, so:
E = 338 kJ/mol * (1000 J/1 kJ) / (6.022 x 10^23 photons/mol) ≈ 5.613 x 10^-19 J/photon
Now we can rearrange the equation to solve for λ: λ = h * c / E
Substitute the values: λ = (6.626 x 10^-34 Js) * (3.0 x 10^8 m/s) / (5.613 x 10^-19 J/photon) ≈ 3.551 x 10^-7 m
To convert the answer to nanometers (nm) and round it to significant digits:
λ = 3.551 x 10^-7 m * (1 x 10^9 nm/1 m) ≈ 355 therefore, the maximum wavelength of light required to break a carbon-chlorine single bond is 177.8 nm, which falls in the ultraviolet range of the electromagnetic spectrum.
In conclusion, the maximum wavelength of light for which a carbon-chlorine single bond could be broken by absorbing a single photon is approximately 355 nm.

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Answer:

Drd

Explanation:

A target trait is a specific characteristic or feature of an organism that is the focus of selective breeding or genetic modification.

In the context of genetics and breeding, a target trait refers to a particular attribute that scientists or breeders want to enhance or modify in an organism. This can be done through selective breeding, which involves choosing organisms with desirable traits to reproduce, or through genetic engineering, where specific genes responsible for the desired traits are directly manipulated.

Target traits can be various features of an organism, such as size, color, disease resistance, or productivity. For example, in agriculture, a target trait could be the yield of a crop, its resistance to pests, or its ability to grow in a particular environment. By focusing on these target traits, breeders and scientists can improve the overall quality and performance of the organism, which can ultimately lead to benefits such as higher crop yields or healthier livestock. The process of selecting or modifying target traits, however, must be carefully managed to avoid potential negative consequences, such as a loss of genetic diversity or unforeseen side effects.

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3.14159, this is π

Followed by 2-6-5-3-5-8-9

Circumference over diameter

7-9, then 3-2-3

OMG! Can't you see?

8-4-6-2-6-4-3

And now we're on a spree

38 and 32, now we're blue

Oh, who knew?

7, 950 and then a two

88 and 41, so much fun

Now a run

9-7-1-6-9-3-9-9

Then 3-7, 51

Half way done!

0-5-8, now don't be late

2-0-9, where's the wine?

7-4, it's on the floor

Then 9-4-4-5-9

2-3-0, we gotta go

7-8, we can't wait

1-6-4-0-6-2-8

We're almost near the end, keep going

62, we're getting through

0-8-9-9, on time

8-6-2-8-0-3-4

There's only a few more!

8-2, then 5-3

42, 11, 7-0 and 67

We're done! Was that fun?

Answer:

1.04 L.

Explanation:

What is given?

Temperature 1 (T1) = 240 K.

Pressure 1 (P1) = 670 mmHg.

Volume 1 (V1) = 1.28 L.

Temperature 2 (T2) = 198 K.

Pressure 2 (P2) = 680 mmHg.

What do we need? Volume 2 (V2).

Step-by-step solution:

To solve this problem, we have to use the combined gas law. The combined gas law expresses the relationship between the pressure, volume, and absolute temperature of a fixed amount of gas. For a combined gas law problem, only the amount of gas is held constant. The formula of combined gas law is:

We need to find the volume 2 (V2), so let's solve for this unknown value and let's replace the given data that we have:

The final volume for this case would be 1.04 L, the volume is being reduced.

Answer:

Ca Hso4 ×

Explanation:

Because i did whT you said

The final electron acceptor in aerobic respiration is oxygen (O2).The electron transport chain (ETC) in cellular respiration relies on a final electron acceptor to help oxygen get reduced into water. This is why oxygen is considered the final electron acceptor in cellular respiration.

During cellular respiration, glucose is broken down into pyruvate. Pyruvate is then transformed into acetyl CoA and enters the citric acid cycle, where it is oxidized and generates ATP, NADH, and FADH2. The final stage of aerobic respiration involves the electron transport chain, in which electrons from NADH and FADH2 are passed through a series of proteins and coenzymes in the inner mitochondrial membrane, ultimately reducing oxygen to form water.

This process is known as oxidative phosphorylation.In conclusion, the final electron acceptor in aerobic respiration is oxygen (O2), and carbon dioxide is generated in the link reaction (pyruvate oxidation) and the citric acid cycle.

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After a while at room temperature, a piece of dry ice, or solid CO2, vanishes without leaving a puddle of liquid behind.

Dry ice, which is a solid form of carbon dioxide, is available. When used for short-term refrigeration, CO2 is usually used because it frequently sublimates from the solid form to the gas state due to the fact that it does not have a liquid state at normal atmospheric pressure. Carbon dioxide that is solid is known as "dry ice." Due to its ice-like appearance and the fact that it truly sublimes rather than melting, dry ice appears to be made of ice. Because the solid does not first become a liquid when heated, it is known as dry ice.

Dry ice, also known as solid carbon dioxide, is very cold (109 °F / 78 °C), and it is frequently used to cool vaccines, chill and freeze food, preserve blood and tissue samples, heat-treat metals, and even produce special effects like fog for events or stage plays. Because solid CO2 does not melt into a liquid when heated but instead transforms instantly into gas, it is referred to as dry ice. Sublimation is the name of this procedure.

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A. The compound with the shorter retention time in a gas chromatograph equipped with a nonpolar column would be 1-chloropropane.

The retention time in gas chromatography is determined by the strength of the interactions between the sample molecules and the stationary phase (in this case, a nonpolar column). Nonpolar compounds tend to have stronger interactions with nonpolar stationary phases than polar compounds do.

1-chloropropane is a more nonpolar compound than 1-bromopropane, which has a polar bromine atom. Therefore, 1-chloropropane will have stronger interactions with the nonpolar stationary phase, resulting in a shorter retention time.

It's also worth noting that the retention time for each compound will depend on the specific conditions of the experiment, such as the column temperature and the flow rate of the carrier gas.

B. It is unlikely that the retention times for the same sample run on a gas chromatograph several days later would be identical to those obtained the first time. There are several reasons why the retention times may not be identical:

Column aging: The stationary phase of the column can degrade over time, leading to changes in the interactions between the sample molecules and the column. This can result in changes in the retention times.

Temperature variations: Small differences in the column temperature between the two runs could result in changes in the retention times, as temperature affects the strength of the interactions between the sample molecules and the stationary phase.

Injection variations: The sample injection process is not always perfectly reproducible, which could lead to variations in the retention times.

Contamination: The column and injection port can be contaminated over time with the sample or other compounds, leading to changes in the retention times.

Overall, while the retention times are expected to be similar, small variations due to these factors should be expected.

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the beaker that contained some water before NaOH were added means that the resulting solution in that beaker will be more dilute. When this diluted sodium hydroxide solution is added to HCl (not hci), the reaction below occurs

HCl + NaOH ⇒ NaCl + H₂O

The reaction above is a neutralization reaction. The concentration of the acid (HCl) will reduce when a base (sodium hydroxide) is added and will also reduce more because of the presence of more water (in the base) which normally reduces the concentration of ions present in an acid or a base to become more dilute.

Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.

What is Hydrocarbon?

A hydrocarbon is an organic compound made entirely of the two atom kinds of carbon and hydrogen. Hydrocarbons are typically colourless gases with barely perceptible odours. The four subcategories that are generally used to classify hydrocarbons are alkanes, alkenes, alkynes, and aromatic hydrocarbons. These chemicals' structures could be quite simple or extremely intricate. The study of hydrocarbons can provide insight into the chemistry and behavior of other functional groups. For commercial purposes, liquefied petroleum gas, which is produced from hydrocarbons like propane and butane, is also used as a fuel source (LPG). Benzene, one of the most fundamental aromatic hydrocarbons, serves as the building block for many synthetic drugs.

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Complete question

Name The Alkenes Below. Name The Alkenes Below. A) Ball& Sticklabels B) Ball & Stick ▼

Answer:

just do it

Explanation:

However, there are also many people with the opposite problem of being too skinny (2Trusted Source).

This is a concern, as being underweight can be just as bad for your health as being obese.

Additionally, many people who are not clinically underweight still want to gain some muscle.

Whether you’re clinically underweight or simply struggling to gain muscle weight, the main principles are the same.

This article outlines a simple strategy to quickly gain weight — the healthy way.

Answer:

Eat more than what calories you burn, eat food with nutrients and eat more frequently. Exercise so you can gain muscle.

Answer:

Tree and Grass?

Explanation:

hope it helps pleass mark me as brainliest answer

Answer:

element

Explanation:

its the only substance type of antom called the element so yeah

When H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases (option C)

A French scientist (Chatelier) postulated a principle which helps us to understand a chemical system in equilibrium.

The principle states that If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.

According to Chatelier's principle a decrease in concentration of the products will favor the forward (right) reaction.

From the above principle, we can conclude that when H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases.

Thus, the correct answer to the question is option C

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The atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.

The total distance from the nucleus of an atom to the outermost orbital of its electron is known as its atomic radii or atomic radius.

As we go down the group, the number of orbits or shell increases.

Hence, atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.

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Explanation:

Plastic takes time to degrade which means it has great longevity. Plastic does not break as easily as glass or other materials. It lasts long and offers great service. Plastic storage containers offer greater flexibility than any other packaging materials.

The volume (ml) of HCl solution at pH 1.52 that can be neutralized with a given amount of CaCO₃ is 17.87 mL

We want to determine the volume of HCl that can be neutralized with a given amount of CaCO₃.

First we will write the chemical equation for the reaction i.e.

2HCl + CaCO₃ → CaCl2 + CO2 + H2O

This means that now 1 mole of CaCO₃, 2 moles of HCl are needed to neutralize.

Mass = 27.0 mg = 0.027 g Using the formula,

mol = mass / molar mass

∴ CaCO₃ mol present =

CaCO₃ mol present = 0.00026977 mol

Since 2 mol HCl is required, 2 mol HCl 70 mol CaCO₃ must be neutralized 20. of CaCO₃ 444 0.00053954 mol HCl

∴ CaCO₃ needs to be neutralized 0.00053954 mol HCl Now for the volume of HCl solution at pH 1.

52 required.

We will first determine the HCl concentration = 10^(-1.52)

[H⁺] = 0.

0302 M

∴ HCl concentration 0.0302 M

Now, for the volume using the formula,

Volume = mol/concentration

Required HCl Volume = 0.01787 L

Hence, the volume in milliliters (mL) of an HCl solution with a pH of 1.52 that can be neutralized by the given CaCO₃ is 17.87 mL.

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