Which is an outer planet?​

Answer: b

Explanation:

It will weigh less than in San Diego. So, the correct option is (B).

The elevation of a geographic location is defined as its height above or below a fixed reference point known as a geoid which is a mathematical model of the Earth's sea level as an equipotential gravitational surface.

Height is defined as the vertical distance of a point on a horizontal surface while Elevation is the height of a point above (or below) sea level.

As the Elevation is higher, the weight will be less, whereas if the Elevation is less, then the weight will be more. For example, the elevation in San Diego is 15 feet, so the weight is 115 pounds, while the elevation in Denver, Colorado, is 5,280 feet, so the weight would be less than 115 pounds.

Thus, it will weigh less than in San Diego. So, the correct option is (B).

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The balanced equation for the production of water from hydrogen gas is

2H₂   +   O₂   →    2H₂O

Based on the balanced equation, for every mole of hydrogen, a mole of water is produced.

∴ Since the moles of water = 25 moles

25 moles of H₂ (hydrogen gas) are required to make 25 moles of H₂O.

Stoichiometry is an important concept which helps us use the balanced chemical equation to measures the amount of reactants and products.

The balanced chemical equation is the equation in which the number of atoms on the left hand side that is reactant side is equal to the number of atoms on the right hand side that is product side in an equation.

First we have to write the Balanced chemical equation

2H₂ + O₂ → 2H₂O

To produce 2 moles of water, 2 moles of hydrogen are required to produce 25 moles of water.

According to the Stoichiometry

[tex]\frac{2\ \text{moles of}\ H_2}{2\ \text{moles of}\ H_2O} \times 25\ \text{moles of}\ H_2O[/tex]

= 25 moles of hydrogen gas is required

Thus, from above conclusion we can say that 25 moles of H₂ (hydrogen gas) are required to make 25 moles of H₂O.

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Answer:

ATP

Explanation:

Answer:

mercury and gallium are two metals that are found in liquid state at NTP.

Answer:

yes

Explanation:yes

The quantities that vary in the isotopes of the same element is number of nucleons and the number of neutrons.

Isotopes are atoms of the same element that have different numbers of neutrons. The number of protons and electrons in isotopes of an element remains the same because they determine the element's chemical properties.

Nucleons refers to the collective number of protons and the neutrons present inside the nucleus. Isotopes can have different physical properties due to the varying number of neutrons.

Therefore, the isotopes differ in the quantity of number of neutrons and the nucleons present.

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Answer:

b

Explanation:

deposition is the differentiates weathering from erosion

Answer:

nosé

Explanation:

wadsdfc evdcaedc<dc

Answer:

second one

Explanation:

Answer:

Electrochemistry,

Explanation:

Electrochemistry is a branch of chemistry concerned with the relation between electricity and chemical change. Many spontaneously occurring chemical reactions liberate electrical energy, and some of these reactions are used in batteries and fuel cells to produce electric power.

I Hope This Helps!!!!!

Answer:

Electrochemistry, branch of chemistry concerned with the relation between electricity and chemical change. Many spontaneously occurring chemical reactions liberate electrical energy, and some of these reactions are used in batteries and fuel cells to produce electric power.

Answer:

m = 3.65 gram

Explanation:

ácido clorhídrico = HCl

M = m/Mr × 1000/mL

0.2 M = m/36.5 gr/mol × 1000/500 mL

0.2 M = m/36.5 gr/mol × 2

m/36.5 gr/mol = 0.2 M/2/L

m/36.5 gr/mol = 0.1 mol

m = 36.5 gr/mol × 0.1 mol

m = 3.65 gram

How close the magnets are together and which direction the poles are pointed to

Answer:Infection with a pathogen does not necessarily lead to disease. Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

Explanation:

Answer:

3.5 mol/L

Explanation:

First convert the 139.9g of LiCl into moles of LiCl.  Don't do the sig fig rule until the very end.

Second, take 930mL of LiCl and divide it by 1000 to convert it to liters.

Third use the molarity formula which is M=mol/L and divide 0.930L by 3.300773877mol and you will get 3.549219223.  This is where the sig fig rule will come into play.  3.5mol/L is a reasonable answer for this problem.

Answer:

Next time you're just recently out of a serious relationship, and you're craving some sort of intimacy and comfort, feel confident that a rebound might actually be a good thing as long as it's an upgrade, either physically, emotionally, a fun date, or even just finding a way to shift your mentality toward viewing. so what im saying is if your happy in that relationship stay in it and if he or she becomes a meany leave it its not goo for your health

Answer:

The velocity is zero

The interpretation of a position-time graph is required.

The correct option is The velocity is zero.

In a position time graph the y axis denotes the position and x axis denotes the time.

A horizontal line where [tex]y\neq 0[/tex].

This means that the points of the line will be for some value of x, the y value will always be constant.

The slope of a position-time graph will gives the velocity of the object.

Slope is given by

[tex]m=\dfrac{\Delta y}{\Delta x}[/tex]

Here, since the graph is a horizontal line, [tex]\Delta y=0[/tex]

[tex]\Rightarrow m=\dfrac{0}{\Delta x}=0[/tex]

The velocity of the person will be zero.

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Answer: Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point. For the elements, color does not vary much from one element to the next

Answer:

Physical properties of matter include;

[tex].[/tex]

Percentage by weight of the NaNO₃, is given by the ratio of the mass of NaNO₃ to the mass of the sample

The percentage by weight of NaNO₃ in the sample is approximately 30.713 %

Reason:

Given parameters are;

Mass of sample of NaBr, NaI, and NaNO₃ mixture = 0.8612 g

Mass of AgNO₃ and AgI formed = 1.0186

Mass of AgCl formed = 0.7125

Required:

Percentage by weight of NaNO₃ in the sample

Solution:

Let A represent NaBr, let B represent NaI, and let C represent NaNO₃, we have;

Equation 1 A + B + C = 0.8612

The addition of AgNO₃, precipitates 1.0186 g mixture of AgBr and AgI, therefore, we have;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgBr}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgI}{Molar \ mass \ of \ NaI} \right) = 1.0186[/tex]

Molar mass of AgBr = 187.77 g/mol

Molar mass of NaBr = 102.894 g/mol

Molar mass of AgI = 234.77 g/mol

Molar mass of NaI = 149.89 g/mol

Which gives;

Equation 2 [tex]A \cdot\left(\dfrac{187.77}{102.894} \right) + B \cdot \left(\dfrac{234.77}{149.89} \right) = 1.0186[/tex]

The forming of the precipitate by passing the compounds through a stream of chlorine gives;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaI} \right) = 0.7125[/tex]

Molar mass of AgCl = 143.32 g/mol

Therefore, we get;

Equation 3 [tex]A \cdot\left(\dfrac{143.32}{102.894} \right) + B \cdot \left(\dfrac{143.32}{149.89} \right) = 0.7125[/tex]

Solving equation (2), and (3) gives;

A ≈ 0.3252 g, B ≈ 0.2715 g

Plugging in the values of A, and B in equation (1), gives;

0.3252 + 0.2715 + C = 0.8612

C = 0.8612 - (0.3252 + 0.2715) ≈ 0.2645

The mass of NaNO₃ in the mixture, C ≈ 0.2645

[tex]The \ percent \ by \ weight \ of \ NaNO_3 = \dfrac{0.2645}{0.8612} \times 100 \approx \underline{30.713 \%}[/tex]

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Calcium (Ca), strontium (Sr), and barium (Ba) are all located in the same column of the periodic table because they have similar atomic structure and similar chemical properties

From the question, we are to determine why calcium (Ca), strontium (Sr) and barium (Ba) are all located in the same column of the periodic table

The periodic table is a tabular arrangement of chemical elements that is arranged by increasing atomic number and groups elements according to recurring properties.

Elements with similar atomic structure and similar chemical properties appear in the vertical columns. These columns are called groups.

Hence, calcium (Ca), strontium (Sr), and barium (Ba) are all located in the same column of the periodic table because they have similar atomic structure and similar chemical properties

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To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option C.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

In the given molecule NH₃, the subscript 3 that is written on the foot of element represents the number of hydrogen atoms in each molecule of ammonia.

Therefore, the correct option is option C.

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Answer:

exposure to the sun (heat and light) for long period of time and air (oxygen reacts with particles)

Answer:

1.2044x10^24 atoms

Explanation:

one mole of any element has 6.022x10^23 atoms

so 2 moles is just multiplying avogadros number by 2

2 x ( 6.022x10^23)= 1.2044x10^24 atoms

Greenhouse gases such as N2O, CO2 and CH4 absorb heat. However, CH4 absorbs more heat than CO2 hence its emission must be controlled.

Green house gases are gases that when released into the atmosphere, can absorb infrared radiation and prevent it from escaping into outer space. This causes the temperature of the earth to increase steadily. Lately, the concentration of the greenhouse gases in the atmosphere has increased owing to anthropogenic activities such as burning of fossil fuels.

Green house gases include; N2O, CO2, CH4 etc. However, CH4 is capable of absorbing even greater heat than CO2. This makes it even more imperative to control the emission of methane gas.

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The amount of Mg(OH)2  present after the reaction is complete is 0.136 moles of Mg(OH)2.

The equation of the reaction is;

2HNO3(aq) + Mg(OH)2(aq) -------> Mg(NO3)2(aq) + 2H2O(l)

Number of moles of Mg(OH)2 = 8.00 g/58 g/mol = 0.138 moles

Number of moles of HNO3 = 0.205 M × 24.2 mL/1000 = 0.00496 moles

Given that;

2 moles of HNO3 reacts with 1 mole of Mg(OH)2

0.00496 moles of HNO3 reacts with 0.00496 moles ×  1 mole /2 moles = 0.00248 moles of Mg(OH)2

Hence, Mg(OH)2 is the reactant in excess.

The amount of Mg(OH)2 remaining = Amount present - Amount reacted

Hence; 0.138 moles - 0.00248 moles = 0.136 moles of Mg(OH)2

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Explanation:

Chlorine is a non metal so covalent bond. KBr has K metal and Br non metal of opp. charges so ionic bond. Na is a metal so ionic bond. NaCl has Na as metal and Cl as a non metal so ionic bond.

D is incorrect

Which of the flowing painting did Miss meacham set up against the bread counter?

Answer:

to highlight Lehmann's lifelong commitment to scientific research

Explanation:

Just took the test. I was correct.

The main reason the author includes the section "Retirement" to highlight Lehmann's lifelong commitment to scientific research. Thus, option A is correct.

An scientific research has been defined as the process that has been designed to diagnose the hypothesis which has the portion of the scientific method or procedure.

Scientific experiment has been done by the testing the particular medicine on an animal and by the observation and  the impact of the medicine on the animal as well as the reaction of the animal.

There are mainly three types of the scientific experiments and these are experiment which has been consist of the major level of the scientific experimentation. The second type has been Quasi- experimental and third type is non- experimental study or reasearch.

Therefore, The main reason the author includes the section "Retirement" to highlight Lehmann's lifelong commitment to scientific research. Thus, option A is correct.

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Answer:

it's all in the passage

Explanation:

read over the passage and find the answer i promise they're in there.