What is the difference between a plain and a plateau? A. Only a plain is flat, a plateau is steep mountainside. B. Both are flat, but a plateau is bordered by cliffs. C. A plain is rolling hills with cliffs, and a plateau is large flat area.

do you want me to try it?

Answer:

Explanation:

blue for base.

Red for ____. What it goes red when in an acidic compound (like coke or pepsi).

So Ca(OH)2 is a base. That means it will turn blue.

Answer:

Acidic Oxides: Acidic oxide are oxides that react with water to form an acid. Acidic oxides are formed by reaction of non metals with oxygen .

[tex]S+O_2\rightarrow SO_2[/tex]

[tex]SO_2+H_2O\rightarrow H_2SO_4[/tex]

Basic Oxides: Basic oxides are oxides that react with water to form bases. Basic oxides are formed by reaction of metals with oxygen.

[tex]2Mg+O_2\rightarrow 2MgO[/tex]

[tex]MgO+H_2O\rightarrow Mg(OH)_2[/tex]

Answer:

answer c

Explanation:

Answer:

The correct option would be 'electrons

Explanation:

Answer:

ummm molecules i have no idea- i tried tho..

Explanation:

is known as a diatomic element hydrogen is the lightest element has an atomic number of one uses the symbol H at standard temperature and pressure hydrogen is an odorless and colorless gas it is combustible and produces water when it burns in air hydrogen is also the most abundant element in the universe with 90% of atoms in the universe being made of hydrogen main sequence Stars such as the sun burn hydrogen as fuel

The mass of the silver : 4.6 g

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

∆T = temperature difference :

[tex]\tt 46-22=24^oC[/tex]

The specific heat of silver is  0.235 J/gºC

Q = heat = 26 J

The mass :

[tex]\tt mass(m)=\dfrac{Q}{c.\Delta T}\\\\m=\dfrac{26}{0.235\times 24}\\\\m=4.6~g[/tex]

Answer:

B

Explanation:

Number of purple flowers

Number of white flowers

1

705

224

2

792

189

3

834

102

4

889

84

5

938

21

6

952

0

Ralph wanted to breed a pea plant that produced only purple flowers. He continued to breed purple-flower producing pea plants together over six generations. The results of Ralph's selective breeding are shown above. What did the selective breeding do to the population of pea plants?

A. increased its genetic diversity

B. decreased its genetic diversity

C. caused a new species of pea plant to form

D. caused a pea plant to exhibit a new characteristic

The correct answer would be that selective breeding decreased the genetic diversity of the population of the pea plants.

The genetic diversity of a population can be viewed as the number of genes in the gene pool of the population.

With each successive generation, more purple-flowered and less white-flowered pea plants were being produced until the 6th generation when only purple-flowered pea plants were produced. The ratio of the purple color gene to that of white color kept increasing until there was no longer a white color gene in the population. Hence, the genetic diversity of the population was decreased by the selective breeding.

The correct option is B

Fluorine, I still remember this from my science fair

Answer:

Ksp = 2.74 x 10⁻⁵

Explanation:

The solubility equilibrium for Ca(OH)₂ is the following:

  Ca(OH)₂(s) ⇄ Ca²⁺(aq) + 2 OH⁻(aq)

I                          0                0

C                       + s               + 2s

E                        s                   2s

According to the ICE table, the expression for the solubility product constant (Kps) is:

Ksp = [Ca²⁺] x ([OH⁻])² = s x (2s)² = 4s³

Then, we calculate Ksp from the solubility value (s):

s = 0.019 M

⇒ Ksp = 4s³ = 4 x (0.019)³ = 2.74 x 10⁻⁵

The Ksp value of Ca(OH)2 is [tex]2.74 \times 10^-^5[/tex].

The Ksp is the solubility product constant.

The solubility equilibrium is

[tex]Ca(OH)_2(s) = Ca^2^+(aq) + 2 OH^-(aq)[/tex]

I                     0                  0

C                     s               +2s

E                     s                 2s

By the ICE table, the expression for Ksp is

[tex]\rm Ksp = [Ca^2^+] \times ([OH^-])^2 = s \times (2s)^2 = 4s^3[/tex]

Now, calculate the Ksp

s, solubility value is 0.019 M

then, [tex]\rm Ksp = 4s^3= 4 \times (0.019)^3 = 2.74 \times 10^-^5[/tex]

Thus, the Ksp value is [tex]2.74 \times 10^-^5[/tex]

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Answer:

Targeted fat loss

Explanation:

Answer:

Spot reduction

Explanation:

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Answer:

mass = 78 grams

volume= 2*5*6=60cm^3

density =m/v

=78/60

13/10=1.3 g/cm^3

Explanation:

The mass of the block of metal would be 780 grams

The volume of the block of metal would be  60 centimeter³

The density of the block of the metal is 13 g/cm³

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

The density is the reciprocal of the specific volume of any substance.

ρ =m /v

As given in the problem a block of metal has dimensions of 2 cm by 5 cm by 6 cm. The block weighs 780 grams

The volume of the block of metal would be  = 2×5×6 centimeter³

                                                                         = 60 centimeter³

The mass of the block of metal = 780 grams

ρ =m /v

ρ = 780 /60 gram/ cm³

ρ = 13 g/cm³

Thus, the mass volume and the density of the block of the metal would be  780 grams , 60 centimeter³, and 13 g/cm³ respectively.

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Answer:

the lava viscosity defines the size and shape of a volcano. Even though lava is 100,000 times more viscous than water, it can still flow great distances. When lava has low viscosity, it can flow very easily over long distances. This creates the classic rivers of lava, with channels, puddles and fountains.

Answer:

[tex]\boxed {\boxed {\sf C. \ 9460 \ kJ}}[/tex]

Explanation:

The formula we must use is given to us:

[tex]q=mL_{vapor}[/tex]

q is the energy, m is the mass, and L(vapor) is the latent heat of vaporization.

The energy is what we calculate and the mass is 2 kilograms. We need to find the latent heat of vaporization, which is on the table.

Now we know:

[tex]m= 2 \ kg \\L_{vapor}=4730 \ kJ/kg[/tex]

Substitute the values into the formula.

[tex]q=(2 \ kg ) * (4730 \ kJ/kg)[/tex]

Multiply. Note that the kilograms (kg) will cancel each other out.

[tex]q= 2* 4730 \ kJ[/tex]

[tex]q= 9460 \ kJ[/tex]

9460 kilojoules are required to vaporize 2 kilograms of copper.

Answer:

Bohr's greatest contribution to modern physics was the atomic model. The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons.

Explanation:

Answer: He proposed a theory for the hydrogen atom based on quantum theory

Explanation:

on the left side of the arrow

The reactants in the chemical equation located on the left side of the arrow. Option D is correct.

The arrow in the chemical equation represents the direction of the chemical reaction, and it separates the reactants from the products.

A chemical equation is a symbolic representation of a chemical reaction, showing the starting materials (reactants) and the resulting substances (products). The general form of a chemical equation is as follows:

Reactants → Products

Reactants: The reactants are the substances present at the beginning of the chemical reaction. They are the starting materials that undergo a chemical change or reaction to produce new substances. Reactants were written on the left side of the arrow.

Arrow: The arrow in the chemical equation points from the reactants to the products, indicating the direction of the reaction. It symbolizes the transformation of reactants into products during the chemical reaction.

Products: The products are the substances formed as a result of the chemical reaction. They are the new compounds or elements that are produced by rearranging the atoms of the reactants. Products were written on right side of the arrow.

For example, let's consider the combustion of methane (CH₄) in oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O):

CH₄ (methane) + 2 O₂ (oxygen) → CO₂ (carbon dioxide) + 2 H₂O (water)

In this chemical equation, methane (CH₄) and oxygen (O₂) are the reactants, and they are located on the left side of the arrow. The products, carbon dioxide (CO₂), and water (H₂O), are located on the right side of the arrow.

Hence, D. is the correct option.

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Given that,

Work done by the system = 125 J

Energy released when it cools down = 438 J

To find,

The change in internal energy.

Solution,

As heat is released by the system, Q = -438 J

Work done by the system, W = -125 J

Using the first law of thermodynamics. The change in internal energy is given by :

[tex]\Delta U=Q-W\\\\=-438-125\\\\=-563\ J[/tex]

So, the change in internal energy is 563 J.

Answer:

Power and Nuclear Fision

Explanation:

For binary ionic compound, the compound is named by first writing the cation followed by the anion. The names of the compounds are;

MgBr₂ - Magnesium Bromide

KCl - Potassium Chloride

Al₂S₃ - Aluminium Sulphide

BeCl₂ - Berylium Chlride

MgCl₂ - Magnesium Chloride

GaN - Gallium Nitride

CaO - Calcium Oxide

BaO - Barium Oxide

AgBr - Silver Bromide

NaF - Sodium Flouride

SrS - Strontium Sulphide

LiCl - Lithium Chloride

AlP - Aluminium Phosphide

CsI - Caesium Iodide

Answer:

188.1J

Explanation:

obtained from Q=MCT

Answer:

Electrons

Explanation:

Answer:

The scientific method is a process that can be used to answer any questions . The process begins when a scientist makes an observation. Then, they do research to learn more about the topic and write a hypothesis. The scientist will make predictions and conduct an experiment, eventually coming to a conclusion. They will share their results with other scientists to help further discovery.

Explanation:

The Scientific method is process used to observe, predict and explain phenomena around us. It involves a series of steps listed as follows:

1. Making observations: the scientist must be a keen observer of events around him

2. Ask questions: the scientist asks questions based on the observations

3. Form a hypothesis and make predictions: the scientist puts forward a reasonable explanation for the observations known as hypothesis. Predictions are then made and tested upon.

4. Experimentation: experiments are conducted to test the hypothesis and the predictions made.

5. Analysis of data and conclusion: the result of the experiments are analysed and conclusion are then drawn.

6. Communication of results: the results obtained from the experiments are then shared with other scientists to aid further research and discoveries.

Strong bases are bases which completely dissociate in water into the cation and OH- (hydroxide ion). The hydroxides of the Group I (alkali metals) and Group II (alkaline earth) metals usually are considered to be strong bases. These are classic Arrhenius bases. Here is a list of the most common strong bases.

LiOH - lithium hydroxide

NaOH - sodium hydroxide

KOH - potassium hydroxide

RbOH - rubidium hydroxide

CsOH - cesium hydroxide

*Ca(OH)2 - calcium hydroxide

*Sr(OH)2 - strontium hydroxide

*Ba(OH)2 - barium hydroxide

A strong base has been indicated with the ability to be a good conductor of electricity. Hence, option B is correct.

Bases are defined as compounds that have the ability to form the release of the negative ions or the hydroxide ions in the solution. The acids release hydrogen or proton, thereby bases tend to have the ability to neutralize acids.

The pH has been the measure of the solution to be able to accept or donate the protons and electrons. The pH has been measured on a scale of 1-14 with the acids having a pH of less than 7, and the pH of bases tends to move towards 14. 7 is the neutral pH.

The strong bases form the dissociation of the ions in the solution more readily, and ions contribute as the medium, thereby forming the conduction of the electricity. Hence, option B is correct.

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[tex]\huge\bold{\mathfrak{\purple{A{\pink {n {\green {s{\blue{w{\red{e {\orange {r}}}}}}}}}}}}}[/tex]

Volume of 20 g of hydrogen at normal temperature and pressure (NTP) = 240.55 ml.

[tex]\huge\sf\underline{\underline{\red{❥︎ Thanks}}}[/tex]

Answer:

Kinetic energy of electron = -E₂ = 3.4 ev

Kinetic energy of electron = -E₄ = 0.85 ev

Explanation:

In case of hydrogen atom energy associated with nth state is,

En =  -13.6/n²

For n = 2

E₂ = -13.6 / 2²

E₂ = -13.6/4

E₂ = -3.4 ev

Kinetic energy of electron = -E₂ = 3.4 ev

For n = 4

E₄ = -13.6 / 4²

E₄ = -13.6/16

E₄ = -0.85 ev

Kinetic energy of electron = -E₄ = 0.85 ev

Answer:

in parallel

Explanation:

All of the home equipment in the residence are linked in parallel.

parallel association

electric appliances are connected in a parallel arrangement in a house circuit because every appliance gets complete voltage as resistance in a parallel association is low.

electric appliances are not linked in series because the cutting-edge can be the same thru all the home equipment connected but voltage increases if extra no. Of appliances are related. If the battery has low voltage than the full voltage it can short circuit.

research greater approximately the parallel.

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Answer:

Its B Nylon

Explanation:

i just took the quiz and got it right.

Answer:

nylon

Explanation:

nylon is a common material used for nets and it is strong

Answer:

9.1% error

Explanation:

Full Question:

Answer:

they need the exchange so they can grow, obtain energy, and get rid of waste. It also helps to mantian a balance of amterials in the cell.

Explanation:

Answer:

B) It will decrease because fewer particles will have the required activation energy.

Explanation:

Temperature is one of the important factors that affect the rate of a chemical reaction. An increase in the temperature of a reaction will cause the reactants to gain more kinetic energy and hence, reduce the energy required for reactants collision (start) to occur i.e. activation energy.

Note that, once the activation energy is reduced, the rate of reaction is increased. In this case, the temperature of a reaction vessel with liquid reactants is lowered to one-third (1/3) of the original temperature. Due to a reduction in the reaction's temperature, the rate of reaction will also decrease because fewer particles will have the required activation energy.

Answer:

B. It will decrease because fewer particles will have the required activation energy.

Explanation:

I took the text :)

Answer:

Oxygen atoms form two double bonds in silicon(IV) oxide.

Silicon(IV) oxide has a high melting point.

Explanation:

Silicon dioxide is structurally analogous to carbon dioxide in the sense that it also contains two oxygen atoms that are double bonded to silicon the central atom in the molecule.

Silicon dioxide has a very high melting point of about 1710 degrees centigrade because of its large macromolecular structure which requires much energy to break such intermolecular interactions.