10 points
All of the following are some things that can decrease the rise in global
temperatures EXCEPT:
using more solar energy
using more fossil fuels
using more biofuels
going Vegan

Answer:

B. A few elements can combine to form a compound

Explanation:

Source:  Tro Nivaldo J.. Principles of Chemistry (p. G-4). Pearson Education. Kindle Edition.

Answer:

.A few elements can combine to form a compound

Explanation:

Answer: the answer is c

Explanation: hope this helps you

Answer: the answer is c

Explanation: hope this helps you

Answer:

A. Chloroplast

Explanation:

Answer:

Double-Replacement Reactions

Explanation:

KOH + HNO3 -> H2O + KNO3

This is a double replacement reaction

The anions are "traded" and two new compounds are produced

(a liquid and a salt)

Answer:

C: They aid in comparison of rock layers at distant locations.

Explanation:

Index fossils are simply fossils of organisms that existed over a wide area and for just a brief duration of time. These fossils help scientists to date rocks and even matching the layers.

Looking at the options, the correct one is Option C.

Answer:

C

Explanation:

EDGE 2022

Answer:

61.4 %

Explanation:

Let's consider a generic chemical reaction.

Reactants ⇒ Products

The theoretical yield is the maximum mass of product that theoretically can be obtained from the chemical reaction.

The actual yield is the mass of the product obtained from the reaction.

The percent yield is:

Percent yield = actual yield / theoretical yield × 100%

Percent yield = 60.9 g / 99.2 g × 100% = 61.4 %

Answer: True

Explanation: Frequency by definition is the number of waves that pass a fixed point given a certain amount of time. The shorter the wavelength, the higher the frequency.

Frequency is the number of wavelengths that pass by a point each second. Therefore, the given statement is true.

In physics, frequency is the amount of waves that pass a given point in a unit of time as well as the amount of cycles or vibrations that a body in periodic motion experiences in a unit of time. After moving through a sequence of situations or locations and then returning to its initial position, a body in periodic motion is thought to have experienced one cycle or one vibration.

The frequency is 2 per second if the period, as well as time interval, needed to complete 1 cycle or vibration is 1/2 second; it is 100 per hour if the duration is 1/100 of an hour. In most cases, the frequency is equal to the period, or time interval, reciprocally, therefore frequency = 1/period = 1. (time interval). Frequency is the number of wavelengths that pass by a point each second

Therefore, the given statement is true.

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Answer:

The final volume when pressure is changed is 126.1mL

Explanation:

Based on Boyle's law, in a gas the volume is inversely proportional to its pressure when temperature remains constant. The equation is:

P₁V₁ = P₂V₂

Where P is pressure and V volume of 1, intial state and 2, final state.

Computing the values of the problem:

350mmHg*200mL = 555mmHgV₂

126.1mmHg = V₂

Answer:

[tex]MM_{C_5S_2}=132.19g/mol[/tex]

Explanation:

Hello!

In this case, since the computation of the molar mass requires the molecular formula, we first realize that of pentacarbon disulfide is C₅S₂ due to the given prefixes. In such a way, we multiply the atomic mass of carbon by five and that of sulfur by two as shown below:

[tex]MM_{C_5S_2}=5m_C+2m_S[/tex]

Thus, we plug in the atomic masses given in the periodic table to obtain:

[tex]MM_{C_5S_2}=5*12.01+2*32.07\\\\MM_{C_5S_2}=132.19g/mol[/tex]

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Answer:1-1 equakls

Explanation:

Answer: Percentage Compositon Of A in the sample= 28.99%

Explanation:

First we calculate the Peak area.

Because each peak is consdered like a triangle in a Chromatogram, The Area of the peak is calculated as  = height x half height of the width

Area of Pea A= 25.1 mm X 4.6mm=115.46mm2

Area of Peak B= 14.5mm x 4.4mm=63.8mm2

Area of PeaK C=  37.1mm x5.9mm =218.89mm2

Total Peak Area=  398.15mm2

Percentage Area of Peak A =  Area of Peak A/Total Peak Area x 100

= 115.46 / 398.15  x 100

=0.2899 x 100

=28.99%

Percentage Compositon Of A = 28.99%

Answer:

density= 1.5 g/cm3

volume= 8cm 3

mass = density×volume

mass= 1.5×8

= 12 g

The mass of an object will be "12 g". To understand the calculation check below.

According to the question,

Density, d = 1.5 g/cm³

Volume, V = 8 cm³

We know the relation,

→ Mass = Density × Volume

or,

        m = d × V      

By substituting the values, we get

            = 1.5 × 8

            = 12 g

Thus the response above is correct.

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Answer:

[tex]84.94\ \text{mL}[/tex]

Explanation:

[tex]m[/tex] = Mass of ethyl alcohol = [tex]67.1\ \text{g}[/tex]

[tex]\rho[/tex] = Density of ethyl alcohol = [tex]0.79\ \text{g/mL}[/tex]

[tex]V[/tex] = Volume of ethyl alcohol

Density is given by

[tex]\rho=\dfrac{m}{V}\\\Rightarrow V=\dfrac{m}{\rho}\\\Rightarrow V=\dfrac{67.1}{0.79}\\\Rightarrow V=84.94\ \text{mL}[/tex]

The volume of ethyl alcohol is [tex]84.94\ \text{mL}[/tex].

Answer:

1-decanethiol on top layer and water on the bottom layer.

Explanation:

Hello!

In this case, since long-chained alcohols have a predominant nonpolar section in the molecule, we understand they are largely insoluble in water, also because their densities tend to be less than that of the water, which means they act as a light phase and water the heavy phase.

In such a way, when mixing equal volumes of 1-decanethiol and water in a separatory funnel, a phase splitting is evidenced and the alcohol remains on the top layer because of its lower density.

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Electrons were held even outside the nucleus, unlike protons as well as neutrons.

Subatomic particles with an elementary charge of -1 were classified as electrons.

An atom's nucleus would be its center. The protons, as well as neutrons in the nucleus, as well as neutrons in the nucleus, make up several of an atom's mass while orbiting electrons contribute only a little amount.

Electrons were held even outside the nucleus, unlike protons as well as neutrons, which have been contained within the nucleus at the heart of the atom. Negative electrons were drawn to the positive nucleus by the attraction of opposite electric charges.

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Answer:

i like one direction

Explanation:

Answer:

Mass = 255 g

Explanation:

Given data:

Number of moles of nitrogen = 7.5 mol

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂      →    2NH₃

Now we will compare the moles of nitrogen and ammonia.

             N₂         :        NH₃

               1          :         2

              7.5       :       2/1×7.5 = 15

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 15 mol × 17 g/mol

Mass = 255 g

Answer:

energy level

sub energy level

electrons in the orbital

Explanation:

Answer:

1/5g/ml

Explanation:

D=m/v

D=5.0/25

D=1/5g/ml

Answer:

You can heat it and then let it cool it in a very strong magnetic field.

It can be heated and then allowed to cool in a very powerful magnetic field. To make an item that is made of magnetic material become a permanent magnet instead of a temporary magnet.

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field.

Heating a ferromagnetic material to a crucially high temperature is the primary method for producing permanent magnets. Although the temperature varies depending on the type of metal, it has the effect of aligning and "fixing" the magnet's domains in place over time.

Electric charges in motion are what generate magnetism. The smallest building blocks of matter are called atoms. Each atom contains electrons, which are tiny particles with electric charges.

Thus, It can be heated and then allowed to cool in a very powerful magnetic field.

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Answer:

It will remain the same.

Explanation:

A buffer solution is a kind of solution that has resistance for changes in the pH of a solution. It is a solution of weak acid and conjugate base or it may be otherwise.

H^+ + A^- <====================> HA.

Buffer solution aids in stabilizing pH and an example of a buffer solution is the human blood.

The higher the concentration, the lower the ka and vice versa. Thus, when 0.4M is being used instead of 0.2M the pH will be the same because when dealing with buffer solution, it is all about the value of (salt) / (acid) rather than on the molarity of one specie alone.

Answer: Examples:: Rubbing Alcohol, Dissolved Sugar in Water

Explanation:

A solution is a homogeneous mixture made up of two or more substances.

1 kilogram = 1000 grams

0.29 kg = 290 grams.

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A jar contains 0.29 kg of olives. The quantity of olives in the jar is 290 grams.

A conversion factor may be significantly defined as a process through which a number is utilized in order to change one or specific set of units to another with the help of mathematical operations like multiplication and division.

According to the question,

The number of olives in the jar = 0.29 kg.

Now, if you want to convert this set of units into grams, you must require simple calculations:

1 kilogram = 1000 grams.

0.29 kilograms = 0.29 × 1000 = 290 grams.

Therefore, a jar contains 0.29 kg of olives. The quantity of olives in the jar is 290 grams.

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Answer:

B

Explanation:

I took the test

Answer:

The correct answer is B

Explanation:

Answer:

1.041g is the maximum sigle dose for the person

Explanation:

The maximum dose for acetaminophen is 15.0mg / kg of body weight for adults

To find the maximum single dosage for a person who weighs 153lb we must convert the lb to kg (1lb = 0.4536kg):

153lb * (0.4536kg / 1lb) = 69.4kg is the mass of the person

As the maximum dose is 15.0mg / kg, the dose of the person is:

69.4kg * (15.0mg acetaminophen / kg) =

Answer:

density = mass / volume

mass of iron = 9.3g

volume of iron = 29.78ml - 28.00ml = 1.78 ml

density of iron = 9.3 / 1.78 = 5.22471910112 = 5.0

Explanation:

Answer:

chemical energy

Explanation:

chemical energy is potential energy

The energy associated with the relative positions of electrons and nuclei in atoms and molecules is called thermal energy.

Generally, the energy possessed by an object due to its position is known as potential energy of the object while the energy possessed by an object due to its motion is called kinetic energy.

However, thermal energy describes the energy that is associated with the relative positions of electrons and nuclei in atoms and molecules.

Thus, we can conclude that the energy associated with the relative positions of electrons and nuclei in atoms and molecules is called thermal energy.

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Answer:

22s

Explanation:

Given parameters:

Acceleration  = 25m/s²

Final velocity = 550m/s

Initial velocity  = 0m/s

Unknown:

Time taken  = ?

Solution:

To solve this problem, we are going to use one of the motion equations:

                 v  = u + at

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time taken

                  550 = 0 + 25 x t

                  550  = 25t

                    t  = 22s