Chemistry High School

Please answer quick!!
Which statement best explains how sexual reproduction increases variation within a species?
A. It causes the genes of two different individuals to mix.
B. It changes the base sequence of an organism's DNA.
C. It changes the trait that a given gene produces.
D. It copies one parent's genes to make each offspring.

Answers

Answer 1

Answer:

Explanation:

it causes the genes of two different individuals to mix

Answer 2

Answer:

Explanation:

A. It causes the genes of two different individuals to mix.

Related Questions

Which contains more carbon 4.71 g of C6H12O6 or 5.85 g C2H6O?

Answers

Answer:

5.85 g C2H6O has more carbon

Explanation:

Weight of carbon in 4.71 g of C6H12O6

[tex]4.71 * 12.01\\56.5671\\[/tex] grams

Weight of carbon in 5.85 g of C2H6O

[tex]5.85 * 12.01\\70.259\\[/tex] grams

Hence, 5.85 g C2H6O has more carbon

Why can more water vapor (water molecules that are in the gas state of matter) be present in warm air than in cold air?

Answers

Answer:

Because warm air is less dense

Explanation:

Help Plz
How does temperature relate to energy?

Answers

Temperature, the average kinetic energy of particles, tells you how warm something is. Thermal energy, the total kinetic energy of the particles, tells you the extent to which a substance or object can transfer heat or make something else warmer. If an object's temperature increases, its thermal energy increases also.

Answer:

temperature a measurement of the average amount of energy PER UNIT OF STUFF

Heat Energy is TOTAL ENERGY IN THE STUFF

So, that's why the difference. If you have two things at the same temperature, then any one mole (which is the same as how many molecules or atoms it takes to make up the molecular weight of something in grams.. so one mole of Hydrogen weighs 1 gram, 1 mole of helium weighs 2 grams, 1 mole of Gold weight 196 grams) of the stuff will have the same amount of energy as one mole of the other stuff. If you measure by total mass though, then you realize that there are more water molecules than gold ones in the same volume of stuff, and heat is about volume and molecular density, not mass.

This is why some Stirling engine folks who have made solar plants use Helium as the working gas.. it contains a huge amount of heat for its volume (also because it is very compressible)

So.. Delta Q goes with moles, not mass.

IS ANYONE GOOD AT CHEMISTRY?! i need help please lol

Answers

Answer:

I'm ok at it.

Explanation:

I can try to help if you need anything:)

What effect does an increase in carbon dioxide (CO 2 ) have on the concentration of hydrogen ions (H^ + ) in the blood?

Answers

Answer:

As the level of carbon dioxide in the blood increases, more H+ is produced and the pH decreases. This increase in carbon dioxide and subsequent decrease in pH reduce the affinity of hemoglobin for oxygen. The oxygen dissociates from the Hb molecule, shifting the oxygen dissociation curve to the right.

When the medium is uniform, how do light waves travel through it? vibrating motion circular motion irregular motion straight line motion

Answers

Answer:

straight line

Explanation:

Answer:

All K12 ppl say yeye

Explanation:

Cuál es la importancia de una fórmula química y explique las clases de fórmulas con sus ejemplos respectivos.

Answers

Answer and Explanation:

Las fórmulas químicas sirven para conocer qué elementos químicos y en qué cantidad están presentes en un compuesto químico. Por ejemplo: la fórmula química del dióxido de carbono es CO₂. Esta fórmula nos indica que la molécula de dióxido de carbono está formada por 1 átomo del elemento químico carbono y 2 átomos del elemento oxígeno.

Los diferentes tipos de fórmulas químicas son: fórmula empírica, fórmula molecular, fórmula semi-desarrollada y fórmula desarrollada. Tomando como ejemplo al compuesto butano:

- Fórmula empírica: C₂H₅ (indica que hay 2 átomos de C por cada 5 átomos de H; es una fórmula mínima)

- Fórmula molecular: C₄H₁₀ (indica que en realidad cada molécula de butano tiene 4 átomos de C y 10 átomos de H).

- Fórmula semi-desarrollada: CH₃CH₂CH₂CH₃ (indica el órden en que se unen los átomos en la molécula).

-Fórmula desarrollada: ver dibujo adjunto (indica cómo están unidos los átomos dentro de la molécula. Ahora vemos los enlaces entre los átomos y que los 2 átomos de C de los extremos están unidos a 3 átomos de H y a otro C, y los dos átomos de C del medio están unidos cada uno a 2 C y 2 H).

what will happen when the rates of evaporation and condensation are equal

Answers

a random person put the answer for you

Which of the following is not an example of a chemical change?
A. rusting iron B. an apple ripening C. cutting paper D. a piece of wood burning

Answers

Answer:

cutting paper is not an example of chemical change.

Explanation:

cutting paper is physical change, its physical properties (size, shape ) change but chemical composition remain same.

The cutting paper is not a example of chemical change of a chemical reaction.

What is chemical reaction?

The kind of reaction in which one kind of element get converted into another kind of elements or molecule is referred as chemical reaction.

What is chemical changes?

Chemical changes take place when a material combines with the other to generate a new substance, a process known as chemical synthesis, or when a molecule decomposes into more than one separate chemicals, a process known as chemical decomposition. These processes are known as chemical reactions, and they are generally irreversible unless they are followed by more chemical reactions.

Cutting paper is just a physical change not chemical change since the paper's characteristics did not change; only the shape, which would be a physical attribute, changed. The term "chemical change" refers to a change in a substance's chemical properties. Burning of paper, for example, or rusting of iron.

Therefore, cutting paper is not a example of chemical change.

To know more about chemical change.

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If I dilute 250 mL of 0.50 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?

Answers

Answer:

The right answer is "0.17 M".

Explanation:

The given values are:

Volume,

V₁ = 250 mL

V₂ = 750 mL

Molarity,

M₁ = 0.50 M

M₂ = ?

As we know,

⇒ [tex]M_1 V_1=M_2 V_2[/tex]

or,

⇒ [tex]M_2=\frac{M_1 V_1}{V_2}[/tex]

On substituting the values, we get

⇒ [tex]=\frac{0.50\times 250}{750}[/tex]

⇒ [tex]=\frac{125}{750}[/tex]

⇒ [tex]=0.17 \ M[/tex]

answer asap pls i give brainliest

Answers

Answer:

B. Revolution is a planet's movement around the sun causing four seasons the occur. Rotation is the spinning of the planet on its axis causing day and night.

What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force

Answers

Answer:

hydrogen bonding

Explanation:

Dipole-Dipole, Dispersion, hydrogen bonding and ion bond

Which is composed of alkenes? welding torch fuel polystyrene cups propane gas degreaser containing hexane

Answers

Answer:

welding torch fuel

Explanation:

Alkenes are chemical compounds formed by a carbon atom and a hydrogen atom. They have an open chain with double bonds between two carbon acts. They are widely used in the composition of fuels, such as welding torch fuel and have as main characteristics the solubility in solvents, the insolubility in water, high melting and boiling point and the absence of colors.

Welding torch fuel is composed of alkenes. The alkenes comprise a series of compounds that are composed of carbon and hydrogen atoms with at least one double bond in the carbon chain.

What are alkenes?

Alkenes are a homologous series of hydrocarbons that contain a carbon-carbon double bond.

The number of hydrogen atoms in an alkene is double the number of carbon atoms, so they have the general formula [tex]C_nH _2 _n[/tex].

For example, the molecular formula of ethene is [tex]C _2 H _4[/tex] , while for propene it is [tex]C _3 H _6[/tex].

Alkenes are chemical compounds formed by a carbon atom and a hydrogen atom.

They have an open chain with double bonds between two carbon acts.

They are widely used in the composition of fuels, such as welding torch fuel and have as main characteristics the solubility in solvents, the insolubility in water, high melting and boiling point and the absence of colors.

Hence, the Welding torch fuel is composed of alkenes.

Learn more about the alkenes here:

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Which two radioisotopes have the same decay mode?
A)220Fr and 60C0
B)37K and 42K
C)37Ca and 53Fe
D)99Tc and 19Ne

Answers

Answer:

Explanation:

37Ca and 53Fe have the same decay mode.

What are the three common modes of radioactive decay?

Three of the most common types of decay are alpha decay (α-decay), beta decay (β-decay), and gamma decay (γ-decay), all of which involve emitting one or more particles.

Which isotopes are most likely to decay?

The most likely mode of decay for a neutron-rich nucleus is one that converts a neutron into a proton. Every neutron-rich radioactive isotope with an atomic number smaller than 83 decays by electron emission. C, 32P, and 35S, for example, are all neutron-rich nuclei that decay by the emission of an electron.

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how do you make a potion of slow falling

Answers

Answer:

So you can make it longer by putting in some redstone. And this will give you a potion that will last for 4 minutes. Alright we're done it's got 4 minute slow falling potions.

Explanation:

Answer:

Ok, to make a slow falling potion, you need 1 water bottle, 1 nether wart, and 1 fantom membrane.

Explanation:

hope I could help, lmk if I did!

The higher the effective nuclear charge, the greater the -------- exerted by the nucleus of the added electron?

Answers

Answer:

Pull

Explanation:

The higher the effective nuclear charge, the more the nucleus will be gaining protons. This process makes the electrons to be drawn closer to the positive charge of the nucleus.

Thus, it leads to a greater pull exerted by the nucleus on the added electrons.

Identify the type of reactions based on the reactants. Then, predict the products for the following reactions. Make sure to balance the reactions.

a. C3H8 + O2 →

b. HBr + KOH →

c. KCl + AlBr3 →

Answers

Answer:

a) C3H8 + 502 ----> 3CO2 + 4H20.

combustion reaction

b) HBr + KOH ----> KBr + H2O

Neutralization reaction

c)AlBr3 + 3 KCl----> 3 KBr + AlCl3

Redox reaction

please help!!
i’m trying to go to sleep

Answers

Answer:

4) C

6) true

I am not sure about 5th one

4) evaporation rate

5) acetone

6) true

which of the following is true about these diagrams

Answers

Answer:

N/A NO DIAGRAM

Explanation:

N/A NO DIAGRAM

N/A NO DIAGRAM N/A NO DIAGRAM

N/A NO DIAGRAM

N/A NO DIAGRAM N/A NO DIAGRAM

N/A NO DIAGRAM

2. If you have 100 graham crackers, unlimited chocolate, and only five marshmallows, how many S’mores can you make? Show calculations.

Answers

Answer:

I'm pretty sure it's only 5, because once you've used up all 5 marshmallows, you can't make any more s'mores. Unless just graham crackers and chocolate counts as a s'more...

6
Use the image of an element square to answer the following
questions:
C
Carbon
12.01
What does the 6 in the upper left
represent?
What does the 12.01 represent?

Answers

Answer:

the 6 stands for the atomic number

the 12.01 stands for the atomic mass

If the scientist measured the mass of the copper cube after it had been in the furnace for one hour what would the cube’s mass probably be? Explain your answer

Answers

No change mass of copper cube will be the same

Four 22.4 samples of nitrogen are bottled at STP and placed into environments with varying temperature. Which environment yield a sample the the greatest kinetic energy?
A)100k
B) 303k
C)273 k
D)200k

Answers

mayeb a is the correct answer .....

3 miles of NaCl in 12 liters of water
What is the molarity

Answers

Answer:

[tex]12 \: litres \: contain \: 3 \: \: moles \: of \: sodium \: chloride \\ 1 \: litre \: will \: contain \: \frac{(1 \times 3)}{12} moles \\ = 0.25 \: mol \: {l}^{ - 1} [/tex]

Explanation:

[tex]12 \: litres \: contain \: 3 \: \: moles \: of \: sodium \: chloride \\ 1 \: litre \: will \: contain \: \frac{(1 \times 3)}{12} moles \\ = 0.25 \: mol \: {l}^{ - 1} \\ or : 0.25 \: M[/tex]

I agree with the person on top have a wonderful day:)

Which of the following best describes where cellular respiration occurs?
O A. In muscle cells
B. In the lungs
C. In every body cell
D. In the intestines

Answers

I think the answer is C

Answer:

The answer is 'C. In every body cell'

Explanation:

I hope this was helpful, have a blessed day.

Which time shows the lowest composition of all green house gases?

Answers

Answer:

1750

Explanation:

Greenhouse gases are those gases that are believed to contribute to the rise in the temperature of the earth by trapping infrared rays close to the surface of the earth.

Prominent among the greenhouse gases are; N2O, methane and CO2.

From the chart, we can see that the lowest sum of concentration of greenhouse gases measured in ppm was obtained in 1750. Thus this period shows the lowest composition of greenhouse gases.

HELP!!! WILL MARK BRAINLIEST!!!
picture attached below

Answers

Answer:

0.2 cm

Explanation:

looking at the ruler, you can see that the diameter is 0.4 cm. to get the radius, just divide by two, which gets 0.2 cm as the radius

identify the reaction of S8+F2-->SF8

Answers

The given reaction is a combination / synthesis reaction, since two reactants combine to form a single product

Which statement explains why carbon-14 dating cannot be used to date ancient rocks?
O Carbon-14 decays at a varying rate.
O Carbon-14 decays quickly leaving the amount too small to measure.
O Carbon-14 can be used only to date the remains of organisms.
O Carbon-14 has a half-life that is much longer than potassium.

Answers

Answer: Carbon-14 decays quickly leaving the amount too small to measure.

Explanation:

Answer:

Explanation:

i did it

State of matter

A gas made up of homonuclear diatomic molecules escapes through a pinhole 3.98 times as fast as oxygen gas. Write the Chemical formula of the gas.

Answers

Answer:

H₂

Explanation:

To solve this question we must find, as first, find the molar mass of the homonuclear diatomic gas using Graham's law. With the molar mass we can identify this gas

Graham's law:

[tex]\frac{V_a}{V_b} =\sqrt{\frac{m_B}{m_A} }[/tex]

Where V is the speed of the gases and m the molar mass of those:

As Va is 3.98 times Vb (And mB is molar mass of oxygen gas = 32g/mol)

[tex]3.98 =\sqrt{\frac{32g/mol}{m_A} }[/tex]

15.84 = 32g/mol / mA

mA = 2.02g/mol

As is a homonuclear diatomic gas, the molar mass of the atom is 1.01g/mol. Thus, the gas is:

H₂

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