SOMEONE PLEASE HELP ME WILL MARK BRAINLIEST PLEASE!!

Answer:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Answer: C. The orbital speeds of planets closer to the Sun will be faster than planets farther away.

Explanation:

Centripetal force = gravitational force

[tex]\tt m\dfrac{v^2}{r}=Fg[/tex]

[tex]\tt Fg=G\dfrac{M.m}{r^2}[/tex]

Fg inversely proportional to distances (r)

[tex]\tt v^2=\dfrac{Fg.r}{m}[/tex]

because the value of the gravitational force is getting smaller as the distance is getting further from the sun, the orbital speed of the planet will be getting smaller

Answer:

The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays

Explanation:

Answer:

Scale

Explanation:

Answer: C

Explanation:

Indicators are organic weak acids or bases with complicated structures.

An indicator is an an organic compound that is used to indicate whether a solution is an acid or a base.

Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.

These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:

1) natural indicators

2) synthetic indicators

3) olfactory indicators.

These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.Examples of indicators are phenolphthalein ,methyl red, EBT,eosin,etc.

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Answer:

are electrons causing the ion to have a positive charge and anions are electrons that have a negative charge

Explanation:

The mass of zinc required to react with HNO3 is 3.45 g

The moles of HNO3 reacting is calculated using the formula below:

volume = 0.850

volume = 125.0 mL = 0.125 L

Moles of HNO3 = 0.850 × 0.125 = 0.10625 moles

Equation of reaction:

Zn + 2 HNO3 --> Zn(NO3)2 + H2

2 moles of HNO3 reacts with 1 mole of Zn.

moles of zinc reacting = 0.10625/2 = 0.053125

Mass of zinc = moles × molar mass

molar mass of Zn = 65

Mass of zinc = 0.053125 × 65

mass of Zn = 3.45 g

Therefore, the mass of zinc will completely react with 125.0 mL of a solution of nitric acid (HNO3) which has concentration of 0.850M is 3.45 g

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Storm clouds being formed will most likely occur in this scenario.

These are formed during the process of convection in which heat and moisture is transported upward into the atmosphere.

We were told that the weather is warm and cold air will enter the region which means that it will replace the heat and moisture as they move upwards thereby resulting in the formation of storm clouds.

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0.2 × 6.022 × 10²³ = 12.044 × 10²² = 1.2044 × 10²³

have set up a lab investigation to illustrate the stages of the water cycle. You are using a heat lamp with three different heat settings to represent the sun and the ener

Which stage of the water cycle is affected MOST by the highest setting on the heat lamp?

A

collection

B

condensation

С

evaporation

D

precipitation

Answer:

Sheet Metal Door:63

Explanation:

Stars with higher mass have much shorter life cycles because stars expand as they get older that is why the larger the star the older it is smaller stars are more dense with more energy

Answer:

the rock has a greater amount of heat energy which transfers to water causing vaporization.

Answer:

The determination of a melting point of a sample is a standard laboratory procedure and is relatively straight forward. It is used to identify a sample, establish its purity and determine the thermal stability of the sample.

Answer:

How do electrons enter the electron transport chain?

All of the electrons that enter the transport chain come from NADH and FADH 2​start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.

Explanation:

i hope it helped u :)

Explanation:

from positive to negative terminal

There will be a flow of current from the battery through the wires to the bulbs.

The term circuit speaks of a path that is designed for the flow of current. We know that current often flows from the battery to other circuit components.

It then follows that in the circuit as shown, there will be a flow of current from the battery through the wires to the bulbs.

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Answer:

86.96

Explanation:

im thinking 266.25g round up to 266.3 i hope i got it right :)

Answer:

Gallium is the correct answer. Gallium melts at a few degrees higher than room temperature, which is 298K.

Answer:

a seesaw because when limiting factors go down, the carrying capacity goes up

Explanation:

A limiting factor is the scarcest resource that limits the growth of a population, so, when limiting factors go down, that growth is no longer limited.

The instrument that might be useful in characterising the equilibrium is spectrophotometer.

Spectrophotometer is an instrument that is used to determine the reflectance of solutions which is affected by the amount of photons absorbed by the solution.

In a solution where by both the reactant and the product contain highly coloured nature of copper, the spectrophotometer can be used to characterise the equilibrium of copper.

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No. It will not be possible to precipitate all lead ions from a solution by precipitating them with chloride.

When a chloride salt is used to precipitate lead ions from a solution, an insoluble lead chloride salt would be formed

Pb2+ + Cl- ---> PbCl2

However, the formation of PbCl2 in an aqueous medium leads to the establishment of equilibrium between dissolved ions and undissolved solids.

PbCl2 (aq) <------> Pb2+ + Cl-

Thus, it will not be possible to completely remove all the lead ions from the solution.

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Benzene is produced by the distillation of crude oil, being one of the by-products formed in this process, or even by synthesis, based on smaller hydrocarbons.

Reaction 1 - Electrophilic Addition of Halide (HX) to Alkenes

Reaction 2 - Radical addition of hydrogen bromide (HBr) to alkenes

Benzene is a compound compound as an aromatic hydrocarbon. It is widely used as a raw material in raw materials, in materials, in airlines and in petrochemical processes used for petrochemical raw materials side for petroleum.

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Based on factors affecting solution formation;

A solution is a substance formed when a substance known as solute dissolves in another substance know as solvent.

Factors that affect solution formation include:

Strong solvent-solute intermolecular forces favors solution formation.

Increase in entropy favours solution formation

Decrease in enthalpy favours solution formation.

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Answer:

The Moon's surface is dominated by igneous rocks. The lunar highlands are formed of anorthosite, an igneous rock predominantly of calcium-rich plagioclase feldspar

Explanation: