Which of the following contains the most electrons?

multiple choice

A - Sn2+
B - Sna+
C - Both have the same number of electrons

Answer:

In the given question, the mass of empty slender is given 25 points 489 Grand. The mass of Slender plus unknown liquid is given 57 points 847 g. The volume of a non liquid is given 45 three ml. We have to find the density of a non liquid. Firstly we will find the mass of unknown liquid. As the mass of unknown liquid is equal to the mass of cylinder plus unknown liquid minus the mask of empty cylinders. So the mass of a non liquid is equal to seven points 847 g -25 points 489 g. The mass of a non liquid will be 32 points 358 g. The formula to calculate the density of a non liquid is equal to the mass of a non liquid divided by the volume of a non liquid. So we will put the values as the mass of a non liquid is 32.358 g, Divided by the volume, which is given 45.3 ML. When we solve this Comes out to be 0.71 g, but I am in. So the Final answer is the density of a non liquid is equal to 0.71 g.

Answer:

\(T_b=239.7K=-33.49\°C\)

Explanation:

Hello!

In this case, since the relationship between entropy and enthalpy for any process is defined below:

\(S=\frac{H}{T}\)

For the vaporization of ammonia or any liquid, we can write:

\(\Delta S_{vap}=\frac{\Delta H_{vap}}{T_{vap}}\)

In such a way, solving the temperature of vaporization, or boiling point, we have:

\(T_{vap}=\frac{\Delta H_{vap}}{\Delta S_{vap}}\)

Plugging in the given enthalpy and entropy of vaporization we obtain:

\(T_{vap}=T_b=\frac{23350\frac{J}{mol} }{97.43\frac{J}{mol*K}} \\\\T_b=239.7K=-33.49\°C\)

Best regards!

From the information provided in the question, the boiling point of ammonia is 240 K.

Entropy is the degree of disorderliness in a system. The entropy of a system can be obtained using the relation;

ΔS°vap = ΔH°vap /T

Now;

ΔH°vap = 23.35 kJ/mol

ΔS°vap = 97.43 J/mol·K

T = ?

Making T the subject of the formula and substituting values;

T = ΔH°vap /ΔS°vap

T = 23.35 × 10^3J/mol/97.43 J/mol·K

T = 240 K

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It should be noted that to explain why the distribution of water storage traits changed over time, a model could employ various techniques from statistical analysis and machine learning.

One possible approach is as follows:

Data Collection: Gather data on water storage traits for a given population over a specific period. The data could include measurements of leaf water potential, stomatal conductance, osmotic adjustment, and other relevant traits.

Data Preprocessing: Clean the data, remove outliers, and normalize the data if necessary.

Exploratory Data Analysis: Conduct a visual and statistical analysis of the data to identify trends, patterns, and correlations. This could include scatterplots, histograms, boxplots, and correlation matrices.

Time-Series Analysis: Use time-series analysis techniques to investigate changes in the distribution of water storage traits over time. This could include fitting time-series models, decomposing the time series, and analyzing the autocorrelation and seasonality of the data.

Hypothesis Testing: Develop hypotheses about why the distribution of water storage traits changed over time, and test these hypotheses using statistical tests such as t-tests, ANOVA, and regression analysis.

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Answer:

As, Halogen

Explanation:

https://www.homeworklib.com/qaa/1153561/d-nh4c5ohm-e-nh42co3-47-which-of-the-following has it here

Although sodium and phosphorus are both found in the same period of the periodic table, the nature of their oxides is different. Although P2O5 is acidic, Na2O is basic.

Metal oxides are basic, whereas non-metal oxides are acidic. The metallic character of the elements lessens as you move from left to right over time, while the non-metallic character grows.

Since the oxides in an element's higher oxidation state are more acidic than those in its lower oxidation state, dinitrogen pentoxide is the most acidic oxide compared to nitrogen dioxide and nitrogen tetraoxide.

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Answer: Divergent boundaries -- where new crust is generated as the plates pull away from each other. Convergent boundaries -- where crust is destroyed as one plate dives under another. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.

Explanation:

earthquakes volcanos n stuff like that

Answer:1. metyletevinyl

4. (Z)-3-hydroxypropenal

Explanation:

Answer:

1. The combined number of protons and neutrons remains constant.

2. There are two atoms with mass numbers of 2.

3. It is the number of protons plus neutrons.

4. A nucleus with a greater mass than any of the reactants will be produced.

5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.

Explanation: I couldn't see the comments so I guess some ppl can't either but here you go got them all correct! :)

Th sun produces energy through fusion reaction by converting small amount of matter into larger amounts of energy.

The sun is able to produce energy because protons of hydrogen atoms present in the sun collide violently in the sun's core and fuse together leading to the formation helium atom.

This process of fussion is referred to as a PP (proton-proton) chain reaction, and it emits an enormous amount of energy

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Scientists cannot pinpoint the changes or variations in the results to a single source when more than one variable is altered during an experiment. The outcomes can be attributed to the independent variable directly by examining and modifying each variable separately.

You can evaluate the outcomes of your experiment to determine how much one adjustment impacted the outcome by testing just one variable at a time. You won't be able to identify the variable that caused the outcome if you're testing two variables simultaneously. A controlled variable is one that is kept constant with the goal of not affecting how an experiment turns out. Controlling any factors that can affect an experiment's outcomes allows us to be certain that the altered variable is what caused our results.

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The percentage composition of each element in (NH₄)₃PO₃ is approximately:

Nitrogen (N): 37.42%

Hydrogen (H): 9.08%

Phosphorus (P): 23.26%

Oxygen (O): 45.24%

We need to determine the molar mass of the compound and the molar masses of each element present.

Molar mass of (NH₄)₃PO₃:

Nitrogen (N) = 14.01 g/mol

Hydrogen (H) = 1.01 g/mol

Phosphorus (P) = 30.97 g/mol

Oxygen (O) = 16.00 g/mol

The molar mass of (NH₄)₃PO₃ can be calculated as follows:

Molar mass = (3 * molar mass of NH4) + molar mass of PO3

           = (3 * (1 * molar mass of N + 4 * molar mass of H)) + molar mass of PO3

           = (3 * (1 * 14.01 g/mol + 4 * 1.01 g/mol)) + (30.97 g/mol + 3 * 16.00 g/mol)

           = (3 * (14.01 g/mol + 4.04 g/mol)) + (30.97 g/mol + 48.00 g/mol)

           = (3 * 18.05 g/mol) + 78.97 g/mol

           = 54.15 g/mol + 78.97 g/mol

           = 133.12 g/mol

Now, we can calculate the percentage composition of each element:

Percentage composition of nitrogen (N):

(3 * molar mass of N) / molar mass of (NH₄)₃PO₃ * 100%

= (3 * 14.01 g/mol) / 133.12 g/mol * 100%

= 37.42%

Percentage composition of hydrogen (H):

(12 * molar mass of H) / molar mass of (NH₄)₃PO₃ * 100%

= (12 * 1.01 g/mol) / 133.12 g/mol * 100%

= 9.08%

Percentage composition of phosphorus (P):

molar mass of P / molar mass of (NH₄)₃PO₃ * 100%

= 30.97 g/mol / 133.12 g/mol * 100%

= 23.26%

Percentage composition of oxygen (O):

(6 * molar mass of O) / molar mass of (NH₄)₃PO₃ * 100%

= (6 * 16.00 g/mol) / 133.12 g/mol * 100%

= 45.24%

Therefore, the percentage composition of each element in (NH4)3PO3 is approximately:

Nitrogen (N): 37.42%

Hydrogen (H): 9.08%

Phosphorus (P): 23.26%

Oxygen (O): 45.24%

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Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \)

From the question

mass of object = 13.2 g

volume = 42.3 mL

The density of the object is

\(density = \frac{13.2}{42.3} \\ = 0.31205673\)

We have the final answer as

Hope this helps you

Answer:

\(\boxed {\boxed {\sf Mass \ of \ products \ = \ mass \ of \ reactants}}\)

Explanation:

The Law of Conservation of Mass states that mass cannot be created or destroyed.

In a chemical reaction, there are products and reactants. The reactants react and produce the products.

Since mass can't be created or destroyed, the mass of the products must be equal to the mass of the reactants if mass was conserved in a chemical reactions.

The equilibrium partial pressure of HF is 0.55 atm.

The equation of the reaction is;

        H2(g) + F2(g) ⇄ 2HF

I         2           1             0

C       -x           -x            +x

E     2 - x        1 - x           x

We know that;

pH2 = 2.0 atm

PF2 =  1.0 atm

pHF = ??

Kp = 0.45

So;

Kp = (pHF)^2/pH2. pF2

0.45 = x^2/(2 - x) (1 - x)

0.45 =  x^2/x^2 - 3x + 2

0.45(x^2 - 3x + 2) = x^2

0.45x^2 - 1.35x + 0.9 =  x^2

0.55 x^2 + 1.35x - 0.9 = 0

x = 0.55 atm

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The percent by mass of the carbon is 30.4%.

The term percentage has to do with the ratio of the mass of a particular atom to the total mass of the compound multiplied by one hundred. Thus the first step is to find the total mass or the molar mass of the compound.

Molar mass = 40 + 2(2(12) + 3(1) + 2(16))

= 40 + 2(24 + 3 + 32)

= 40 + 2(59)

= 40 +118

= 158

Thus the mass of carbon is;

4(12)/158 * 100/1

= 30.4%

Thus carbon is only about 30.4% by mass of the compound.

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Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products.

Endothermic reactions quickly and efficiently take up heat-based energy from their surroundings. In contrast, an exothermic process transfers energy into the system's surroundings. A common illustration of an endothermic chemical reaction is photosynthesis.

Chemists refer to the process of boiling water as being endothermic since heat must be added. It follows that since certain processes need heat, others must also produce heat as they operate. They are referred to as exothermic.

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Answer:

This question lacks options, the options are:

A). synthesizes more sugar

B). has a higher chromosome count

C). produces fewer proteins

D). uses less carbon dioxide

The answer is A

Explanation:

The chloroplast is an organelle present in the cells of photosynthetic organisms. It is the site where photosynthesis, which is the production of food (sugars) from sunlight energy, occurs.

According to this question, a cell in the leaf of a corn plant contains more chloroplasts than a cell in the stem of the same corn plant. Based on this observation, it can be inferred that the LEAF CELLS WILL SYNTHESIZE MORE SUGARS THAN THE STEM CELL because the more the chloroplast, the higher the photosynthetic rate and subsequently the higher the amount of sugar produced.

The expected lattice energies, in increasing order, are MgO> MgBr2> KBr.  

The ranking is related that the lattice energy being directly proportional to the strength of the ionic bond. If the bond is strong, the lattice energy would be high.

If the intermolecular force is strong, then the energy requires to break the bond would be greater. Thus, the lattice energy would be high.

MgO has the lowest lattice energy because it is the smallest and has the weakest attractive force between the ions. MgBr2 has a slightly higher lattice energy because the bromine ions are larger and have a stronger attractive force than the oxygen ions. KBr has the highest lattice energy because the potassium ions are larger than the bromine ions and have a stronger attractive force.

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The final concentration of the solution would be 0.93 M.

According to the dilution principle, the number of moles before dilution must be equal to the number of moles after dilution. This can be mathematically represented by:

\(m_1v_1 = m_2v_2\)

Where \(m_1\) and \(m_2\) are initial and final concentrations, while \(v_1\) and \(v_2\) are initial and final volumes of the solution.

In this case:

\(m_1\) = 4.0 M

\(v_1\) = 230 mL

\(v_2\) = 990 mL

Substituting each of these variables into the dilution equation and making the final concentration the subject of the formula, we have:

\(m_2\) = \(m_1v_1/v_2\)

    = 4x230/990

   = 0.93 M

In other words, the final concentration after diluting 230 mL of a 4.0 mol/L sodium chloride soltuion to a final volume of 990 mL would be 0.93 M.

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Explanation:

First, we need to calculate the number of moles of heptane that are burned:

0.470 kg heptane × (1 mol heptane / 100.2057 g heptane) = 0.004696 mol heptane

According to the balanced chemical equation, 1 mol of heptane produces 7 mol of CO2. Therefore, the number of moles of CO2 produced is:

0.004696 mol heptane × (7 mol CO2 / 1 mol heptane) = 0.032872 mol CO2

The ideal gas law relates the number of moles of a gas to its volume, pressure, and temperature:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

We can rearrange the ideal gas law to solve for the volume:

V = nRT / P

where V is in liters, n is in moles, R is 0.08206 L·atm/mol·K (the ideal gas constant), T is in Kelvin, and P is in atm.

We need to convert the temperature to Kelvin:

17.0°C + 273.15 = 290.15 K

Substituting the values into the equation, we get:

V = (0.032872 mol CO2)(0.08206 L·atm/mol·K)(290.15 K) / 1 atm = 0.758 L

Therefore, the volume of carbon dioxide gas produced is 0.758 L. Rounded to 3 significant digits, the answer is 0.758 L.

Answer:

An electric field is the physical field that surrounds each electric charge and exerts force on all other charges in the field, either attracting or repelling them.

In an ecosystem, based on their scientific names, you know the cats felis catus and felis bieti do not belong to the same species.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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B. The study of matter and energy.

Because physical science is everything that doesn't include organic things.

The  study of matter and energy among the following  best describes physical science.

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it possess volume .Matter is composed up of atoms which may or not be of same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states  of substances such as solids, liquids and gases depending on the conditions of  the temperature and  the pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter is always conserved by law of conservation of matter.The law was proposed by Antoine Lavoisier.

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Answer:

Increased

Explanation:

The probability that three bulbs, initially with closed valves, containing one mole of Hydrogen in bulb A and one mole of Helium in bulb C, will have all of the Hydrogen in bulb C and all of the Helium in bulb A after the valves are opened is zero.

The motion of individual gas molecules is determined by random thermal motion, which is described by the kinetic theory of gases. The movement of individual gas molecules from one bulb to another will be completely random and the probability of all the Hydrogen in bulb A moving to bulb C and all of the Helium in bulb C moving to bulb A is extremely low, effectively zero.

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Answer:

B

Explanation:

Acetaminophen is used to treat patients with aches and fever. It is safe to give a dose of 4 grams in 24 hours period.

It is an effective medicine which does not require much time to provide relief to the patient.

Usually tylenol is the best medicine which consists of Acetaminophen in appropriate quantity to provide relief from pain and fever.

The reporting for the doses introduced to the patient must be routine since it is not an emergency case.

The correct answer is a. Routine

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The empirical formula of the compound is C₂H₁₆S₂N₃O.

The moles of each element is as follows::

For CO₂:

Carbon (C) has a molar mass of 12.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles

Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles

For H₂O:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles

Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles

For SO₃:

Sulfur (S) has a molar mass of 32.06 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles

Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles

For HNO₃:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Nitrogen (N) has a molar mass of 14.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles

Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles

Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles

The simplest whole-number ratio of the elements will be:

Carbon: 0.173 moles / 0.080 moles ≈ 2.16

Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88

Sulfur: 0.149 moles / 0.080 moles ≈ 1.86

Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10

Oxygen: 0.080 moles / 0.080 moles = 1

Therefore, the empirical formula is C₂H₁₆S₂N₃O.

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