1.
How many miles per hour is 30.5 m/s?

Answer:

True

It is true that he size of coupling constants (J values) depend on three factors:

a. Through bond distance between the protons.

b. Angle between the two C-H bonds.

c. Electronegative substituents.

Explanation:

With the increase in the valence angle the coupling constant reduces. The distance between the carbon atoms also influence coupling constant. With increase in bond length, the coupling constant decreases. Also the more an atom is electronegative, the lesser is the coupling constant

Thus, it is true that he size of coupling constants (J values) depend on three factors:

a. Through bond distance between the protons.

b. Angle between the two C-H bonds.

c. Electronegative substituents.

Answer:

=external pressure on liquid

Answer:

240/60 .minute

plz make me brainliest

Answer:

28.9452

Explanation:

Answer:

28.9452%

Explanation:

Rb-44.1781

Cr-26.8767

O-28.9452

Answer:

a. Br2 (l) → Br2(g) ΔH°rxn = 30.91 kJ/mol

Explanation:

Bond enthalpy is the energy which is required to break 1 mol of of bonds in gaseous covalent molecules. Bond breaking process can be endothermic or exothermic depending on the molecules association. The process needs to be performed in chemical laboratory under standard conditions.

Answer:

See explanation

Explanation:

Big Bang: During the big bang, elements were formed by the squeezing together of light nuclei. Hydrogen atoms were fused together to make helium,  lithium  and other light weight elements.

Stellar Nucleosynthesis: Stellar nucleosynthesis is the process by which elements are created within stars by combining the protons and neutrons together from the nuclei of lighter elements(Thoughtco). In the stars, hydrogen may be fused to give helium, lithium and other elements lighter than iron.

Supernova Nucleosynthesis: A supernova is a process in which a star releases a large amount of energy together with neutrons, hence elements that are heavier than iron, like uranium and gold, can be produced in the process.

Answer:

Due to drought in Florida, people were informed to minimize the use of water and certain rules were made regarding water usage.

Explanation:

A drought is a shortage in the water supply. The drought in Florida led to water restriction as it was a way to prevent the shortage of water in the long run. Florida experienced a drought and water restriction was used as a way to curtail further shortage of water.

New rules were made to prevent wastage of water such as limiting lawn watering to one day in a week, limiting of car washing, and homeowners were not allowed to do things that  can lead to an increase in water usage.

Answer:

Pe = 8700 N/m³

Vesp = 1,15 cm³/g

Explanation:

Ya que conocemos el valor de la densidad de este aceite, es muy sencillo calcular tanto volumen como peso específico.

En el caso de volumen específico, esta se refiere al cociente del volumen de un líquido con su masa respectiva. En otras palabras, es el inverso de la densidad, por tanto usamos la siguiente expresión para el volumen específico:

Vesp = 1/d

Vesp = 1 / 0,87

Para el caso del peso específico, se calcula como el cociente de la masa del líquido y su volumen que ocupa. Sin embargo no conocemos ninguno de esos dos datos, por lo que para calcular el peso específico solo basta multiplicar este valor por la aceleración de gravedad, que vamos a asumir para este problema que es 10 m/s². Y ademas cambiaremos las unidades de densidad de g/cm³ a kg/m³. Esto es porque las unidades de peso específico son N/m³ y los newton (N) son kg m/s².

d = 0,87 g/cm³ * (1 kg/1000g) * (100 cm/1m)³ = 870 kg/m³

Pe = 870 kg/m³ * 10 m/s²

ESpero te sirva.

Answer:

cold water because as temperature increases the less soluble co2 is in it

Explanation:

Answer: The one listed below that's NOT an example of potential energy is mechanical energy. Mechanical energy is categorized as a kinetic energy with light, sound, and thermal/heat energy.

HOPE THIS HELPS

The energy that a body possesses as a result of its position with relation to other bodies, internal tensions, electric charge, and other considerations . Mechanical energy is not an example of potential energy.

Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases.

Although a force must be applied to an object in order for it to store potential energy, potential energy is technically stored inside matter.

The potential energy must be released, despite the fact that the energy is held in the object's mass due to gravity or elastic forces.

Thus, Mechanical energy is not an example of potential energy.

To learn more about potential energy refer the link below;

https://brainly.com/question/24284560

#SPJ2

The organelle(s) that act(s) as "the boss" inside a cell is The nucleus.

Nucleus is the center most part of the cell that contains all the chromosomes and that contains all the genetic information.

The nucleus is a double-membraned organelle that contains the genetic material and other instructions required for cellular processes. It is exclusively found in eukaryotic cells and is also one of the largest organelles.

The nucleus contains nearly all of the cell's DNA, surrounded by a network of fibrous intermediate filaments and enveloped in a double membrane called the nuclear envelope. The nuclear envelope separates the fluid inside the nucleus, called the nucleoplasm, from the rest of the cell.

Therefore, The organelle(s) that act(s) as "the boss" inside a cell is The nucleus.

Learn more about Nucleus of cell here:

https://brainly.com/question/4031640

#SPJ2

Answer:

$89.69

Explanation:

$1000 = 1 oz = 28.3g

volume = mass/density

volume = 28.3/19.3 = 1.47cm³

1 inch= 2.54 cm

1 cubic inch = (2.54)³ = 16.39 cm³

16.39/1.47 = 11.15 cubic inch

11.15 cubic inch = $1000

1 cubic inch = 1000/11.15 = $89.69

Answer:

true

Explanation:

true

Answer:

Constrictive,

Explanation:

Constrictive population pyramid displays lower percentages of younger people

Answer:

yes answer os Na because it's electronic configuration is 1s^2,2s^2,2p^6,3s^1

The mass allowance of Vitamin C for children aged 4-8 years is equal to 0.025 grams.

A mole can be defined as a standard unit that can be utilized to evaluate the number of entities such as atoms, molecules, ions, or other particular particles in a particular amount of the substance.

The number of elementary entities present in one mole of any chemical substance was found to be equal to 6.023 × 10²³ which is also known as the Avogadro number.

Given, the number of moles of vitamin C = 0.000142 moles

Given, the molecular formula of Vitamin C is C₆H₈O₆.

The mass of one mole of C₆H₈O₆ = 176 g

One mole of Vitamin C has mass = 176 g

0.000142 mol of Vitamin C has mass  = 0.000142×176 = 0.025 g

Therefore, the mass of 0.000142 mol of Vitamin C is 0.025 g.

Learn more about the mole, here:

brainly.com/question/26416088

#SPJ2

Answer:

True

Explanation:

The unit cell is the smallest group of atoms which has the overall symmetry of a crystal, and from which the entire lattice can be built up by repetition in three dimensions (Oxford dictionary).

The number of atoms in a unit cell of a crystal structure must be equal to or a multiple of the number of atoms in the empirical formula of the compound. In other words, the unit cell should contain the formula unit of the compound.

Answer:

the heat given off is 75 J.

Explanation:

Given;

latent heat of fusion of lead, L= 25 J/g

mass of liquid lead, m = 3.0g

The heat given off is calculated as;

H = Lm

Where;

H is the quantity of heat given off

H = 25 x 3

H = 75 J.

Therefore, the heat given off is 75 J.

Answer:

el que paso del one jhaulio

Explanation:

Answer:

The image appears to have some words cropped out. Nonetheless, "receptor" would seem to be the most appropriate term here.

Answer:

Exotérmica.

Explanation:

¡Hola!

En este caso, dado que la mayoría de reacciones de combustión son exotérmicas, al generar calor en los productos, es posible inferir que esta reacción, referida a la combustion de metano es exotérmica debido a lo anteriormente mencionado, ya que el término de energía de reacción, 531 kcal, está al lado de los productos, lo que quiere decir que es energía generada.

¡Saludos!  

Answer:  The volume needed at STP is 2.016 L

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}[/tex]

[tex]0.0900mol=\frac{x}{22.4L/mol}[/tex]

[tex]x=0.0900mol\times 22.4L/mol=2.016L[/tex]

Thus the volume needed at STP is 2.016 L

Answer:

a. 6.57 cm

b. 8.17 cm

c. 0.80

Explanation:

a. The compound moved from where it was first placed, to a spot 7.57 cm from the bottom of the paper, in other words:

b. A similar method is made for the solvent:

c. The Rf of the factor is equal to the distance that the compound moved divided by the distance the solvent moved:

Answer:

Vaccines. Vaccines are chemicals that stimulate the body's immune system to better fight pathogens when they attack the body. ...

Antibiotics. ...

Pest Resistant Crops. ...

Plant and Animal Breeding. ...

Biocatalysts. ...

Fermentation. ...

Microorganisms. ...

Bioremediation.

Explanation:

Answer:

The substance is a mixture

Explanation:

The question lets us know that when solvent X was used as the mobile phase, we obtained only one spot. This may deceive us into thinking that the substance is pure since a pure substance has only one spot on a chromatogram.

However, the same substance yields three spots with solvent Y. This shows that the unknown sample is a mixture of substances and solvent X was unable to fully separate the mixture.

Answer:

142.5 g

Explanation:

According to the chemical reaction:

C₆H₁₂O₆ --> 2 C₂H₅OH + 2 CO₂

1 mol of glucose (C₆H₁₂O₆) forms 2 moles of ethyl alcohol (C₂H₅OH) and 2 moles of carbon dioxide (CO₂).

We first convert the moles to grams by using the molecular weight (Mw) of each compound:

Mw (C₆H₁₂O₆) = (12 g/mol x 6) + (1 g/mol x 12) + (16 g/mol x 6)= 180 g/mol

1 mol C₆H₁₂O₆ = 180 g/mol x 1 mol = 180 g

Mw(C₂H₅OH) = (12 g/mol x 2) + (1 g/mol x 5) + 16 g/mol + 1 g/mol= 46 g/mol

2 mol C₂H₅OH = 2 mol x 46 g/mol = 92 g

Thus, when the process is 100% efficient, 180 grams of glucose produce 92 grams of ethyl alcohol. To form 51.0 grams of ethyl alcohol, we will need:

51.0 g C₂H₅OH x (180 g C₆H₁₂O₆/92 g C₂H₅OH) = 99.8 g C₆H₁₂O₆

As the process has a lower efficiency (70.0%), we will need more glucose to obtain the required yield. So, we divide the mass of glucose required for a process 100% efficient by the actual efficiency:

mass of glucose required = 99.8 g C₆H₁₂O₆/(70%) = 99.8 g C₆H₁₂O₆ x 100/70 = 142.5 g

Therefore, it would be required 142.5 grams of glucose to obtain 51.0 grams of ethyl alcohol.

Answer:d

Explanation:Since the earth would be closer to the sun the ozone layer would not be able to handle the more powerful ultra violet rays making the earth to hot.

Answer:

b.

Explanation:

From the given information:

[tex]p = \dfrac{zM}{N_oa^3}[/tex]

where;

a = 0.41 nm = [tex]4.1 \times 10^{-8} \ cm[/tex]

M = 90.5 + 37.3 = 127.8 g/mol

[tex]N_o = 6.023 \times 10 ^{23}[/tex]

p = 3.15 g/cm³

∴

[tex]3.15 = \dfrac{z \times 127.8}{(6.02 \times 10^{23}) \times (4.1 \times 10^{-8} )^3}[/tex]

Z = 1

Thus, the ceramic material has a simple cubic crystal system and the crystal structure is possible to be Cesium chloride.