neeeeeed helpppppp will give brainiest

Answer:

2 g/cm3

Explanation:

Density is a measure of a substance's mass over its volume.

d = m/v

Therefore d = 60g/30cm3 = 2 g/cm3

Answer:

Explanation:

Every A will be paired with a T, and every C with a G and vice versa (T to A, and G to C)

So the first letters in the sequence are ATGGG. So the pair will be TACCC.

P1 = 300 torr

V1 = 50 mL

P2 = 150 torr

V2 = ?

applying Boyle's Law

P1 * V1 = P2 * V2

300 torr * 50 mL = 150 torr * V2

V2 = 300 torr * 50 mL / 150 torr

V2 = 100 mL

Answer:

When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down

Explanation:

Answer: when the carbon dioxide concentration goes up the temperature goes up. when it goes down the temperature goes down

Explanation:

Answer:

hi

Explanation:

Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.

-facts

Answer:

The correct option is (c).

Explanation:

Given that,

Mass of iron, m = 3 kg = 3000 g

The temperature of ice increases from 20° C to 25°C.

The specific heat of iron is 0.45 J/g°C

We need to find the energy required to raise the temperature. The formula is given by :

[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]

So, 6750 J of energy is required to raise the temperature or iron.

Answer:

hy do C-C bonds and C-H bonds have high potential energy levels? ... electronegativity so the electrons in the covalent bond are equally shared. Term. Which functional groups are commonly found on a carbohydrate? ... few organisms have the specific enzymes needed to break the bond in the B-form ...

Explanation:

Answer:

A is more dense

Explanation:

The is because you can find the density of anything by dividing the Mass by volume A is .7428 and B is .7051 . There fore A is denser .

Answer:

Sound Energy is a form of Mechanical Energy

Answer:

34176.5 torr

Explanation:

It is given that :

Initial pressure, [tex]$P_1 = 830$[/tex] torr

Initial volume, [tex]$V_1 = 650 \ cm^3$[/tex]

Initial temperature,   [tex]$T_1 = 85^\circ C$[/tex]

Final volume,  [tex]$V_2 = 65 \ cm^3$[/tex]

Final temperature,   [tex]$T_2 = 350^\circ C$[/tex]

Therefore, using the combined gas laws, we can write :

[tex]$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$[/tex]

Substituting the values, we get

[tex]$\frac{830 \times 650}{85}=\frac{P_2\times 65}{350}$[/tex]

[tex]$P_2 = \frac{830 \times 650 \times 350}{85 \times 65}$[/tex]

    = 34176.5 torr

So the new pressure is 34176.5 torr.

Answer:

1st Square - Liquid

2nd Square - Gas

3rd Square - Solid

Explanation:

Answer:

BaSO4

Explanation:

i tried, hope it helped

Answer:

Trail Mix

Explanation:

The best description for the snack that Ben is eating would be Trail Mix. This is a very common snack for hikers, hence the name, since it is very healthy and great for taking on hikes since it does not get affected by the sun. This snack was originally called GORP which stands for "good old raisins and peanuts" because the snack originally contained only raisins and peanuts. It has since changed to include various different ingredients such as a variety of nuts, chocolate pieces, dried fruit, cereal etc.

Answer:

b,c,f,g

Explanation:

it makes the most sense plus i just took the test <3 good luck

With an increase in the kinetic energy of the solid molecule the intermolecular bonds become weaker, temperature increases, melting and molecules vibrating faster are changes.

Kinetic energy is the form of the energy that is present in an entity in motion. When the kinetic energy is increased then the temperature of the particles increases and leads to evaporation.

The increased kinetic energy weakens the intermolecular bonds of the liquid particles and the molecules of the particles start vibrating fast.

Therefore, option b. intermolecular bonds become weak, option e. evaporation, option f. temperature increases and option h. molecules vibrate faster are the changes.

Learn more about kinetic energy here:

https://brainly.com/question/25726474

Answer:

0.182 moles of CO₂ are produced by this combustion

Explanation:

First of all, we state the combustion reaction:

C₃H₈  +  5O₂  → 3CO₂  +  4H₂O

As we do not have data from the oxygen, we assume it as the excess reactant. Let's determine the moles of propane, by the Ideal Gases Law.

We convert pressure from Pa to atm

67200 Pa . 1 atm /101300 Pa = 0.663 atm

P . V = n . R . T

0.633 atm . 2.33L = n . 0.082 . 297K

(0.633 atm . 2.33L) / (0.082 . 297K) = n

n = 0.0606  moles

Now we analyse the stoichiometry. Ratio is 1:3.

1 mol of propane can produce 3 moles of carbon dioxide

Then, 0.0606 moles of propane may produce (0.0606 . 3) /1 = 0.182 moles

In conclussion, 0.182 moles of CO₂ are produced by this combustion

Answer:

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Explanation:

Answer:

nitrogen, oxygen, carbon dioxide, water vapour, ozone, helium, and hydrogen.

Explanation:

Answer:

The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).

Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.

To learn more about nucleotides, follow the link;

https://brainly.com/question/967810

#SPJ2

Answer:

Blank 1 - Microscope

Blank 2 - Cell Theory

Explanation:

Answer:

microscope. and cell theory

Explanation:

with the invention of the microscope. scientists were able to create cell theory

Respuesta:

60°

Explicación:

Paso 1: Información dada

Paso 2: Convertir "d" a metros

Usaremos el factor de conversión 1 m = 100 cm.

2000 cm × 1 m/100 cm = 20 m

Paso 3: Calcular el ángulo entre la cuerda y el suelo (θ)

W = F × d × cosθ

800 J = 80 N × 20 m × cosθ

θ = 60°

Answer:

1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.

Explanation:

The balanced reaction is:

Mg + 2 HCl → MgCl₂ + H₂

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products. That is, the law of conservation of mass implies that the sum total of charges before and after the chemical reaction remains constant.

The relationships between the quantities of reactants consumed and products formed depend directly on this conservation law, and therefore can be determined by an equation that describes them. This equality is called the stoichiometric equation.

In this case, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), you have:

Then, 1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.

Answer:

1 mole of magnesium, Mg

Explanation:

The balanced equation for the reaction is given below:

Mg + 2HCl —> MgCl₂ + H₂

From the balanced equation above,

We can see clearly that 1 mole of Mg requires 2 moles of HCl.

Thus, 1 mole of magnesium, Mg is needed for the reaction.

Did u get the answer im taking the test rn

Answer:

can be used in fireworks, flares and sparklers

Explanation:

as it burns in air it ignites with bright light

Answer:

No

Explanation:

A mixture is when two or more substances combine physically together. However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone. ... Therefore, water is not a mixture

Answer:

Here's the answer pretty thang = 140 N

Explanation:

List Known Values-

35N

4M

Formula-

W=FJ

Substitution-

W= 3.5N (4m)

Answer & Units-

140 N

Bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.

The work is something which need energy to be done it can be any physical or chemical energy that can be calculated with the help of Newton law.

Work is calculated by multiplying the force required for the work  by the amount of movement of substance or object.

                    W = F × d   here, W = work

                                                  F = force

                                                  d = distance

Substituting the value in the formula,

                     W = 35 × 4  

                      W = 140 joules

Newton-meter is the same thing as a joule so the unit is joules.

Therefore, bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.

Lean more about work, here:

https://brainly.com/question/14540101

#SPJ2

Answer:

m - commerce is the buying and selling of goods and service through wireless handheld devices such as smartphones and tablets as a form of commerce, m - commerce enables users to access online shopping plat forms without needing to use a desktop computer

Answer: not enough information given, sorry I can’t be more help

Explanation: