2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O

In the above equation how many moles of N2 can be made when 166.8 grams of CuO are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element

Molar Mass

Hydrogen

1

Nitrogen

14

Copper

63.5

Oxygen

16

2. For the reaction C + 2H2 → CH4, how many moles of carbon are needed to make 174.6 grams of methane, CH4 ?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element

Molar Mass

Hydrogen

1

Carbon

12

3. 3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

In the above equation how many moles of water can be made when 110.2 grams of HNO3 are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element

Molar Mass

Hydrogen

1

Nitrogen

14

Copper

63.5

Oxygen

16

Answer:

d

Explanation:

it is called the solvent. let me know if this is wrong.

Answer:

d

Explanation:

the solvent is the liquid that the salt is dissolved in(the water) the solute is what is dissolved in the solvent(the salt) the solution is the outcome of the experiment.

Answer:

i dont really have explaining but see green leaf have some amount of water and chlorophyll so it doesn't get burnt and dry leaves lose water and have no amount of them so they get burnt

Answer:

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Hello..!

¿What is Cadenas tróficas?

Food chains are chains of living beings that inhabit a certain territory and that comply with the flow of

energy through your diet.

Answer:

The answer that completes the question are in BOLD:

At chemical equilibrium, the amount of PRODUCT AND REACTANT REMAIN CONSTANT because the RATES OF THE FORWARD AND REVERSE REACTIONS ARE EQUAL.

Explanation:

In a reversible chemical reaction, an equilibrium is said to be achieved when the rates of the forward reaction is equal to that of the reverse reaction. A reversible reaction is one in which products are formed from reactants simultaneously with the formation of reactants from products.

The combination of two or more substances called REACTANTS gives rise to another substance called PRODUCT, which can in turn give rise to Reactants again. With time, the rate at which the reactants give rise the products, which is called the FORWARD REACTION will be equal to the rate at which the products give rise to the reactants, which is called REVERSE REACTION. At this point, the chemical reaction is said to be in a STATE OF EQUILIBRIUM.

When the rate at which both reaction occurs becomes equal i.e. at an equilibrium state, the concentration of both the reactants and the products becomes constant i.e. no longer changes. Hence, the amount of the reactants forming the products is the same as the amount of products forming the reactants.

N.B: At chemical equilibrium, the amount of the reactants and products does not necessarily equals zero (0). It simply means that there is no net change in the concentration/amount of both reactants and products.

Answer: 19.20 g. Explanation: ∵ mass % = [mass of solute/mass of solution] x 100.Apr 30, 2019

Explanation: I don't know if this helped but uh yeah.

Answer:

Ca(CO3) --> CaO + CO2

Zn + H2SO4 --> ZnSO4 + 2H2

Explanation:

^^^

Answer: it floats because it’s less dense than water

Explanation: since it’s less dense it floats

To calculate the maximum mass of water produced in the reaction between sulfuric acid and sodium hydroxide, we need to determine the limiting reactant and use stoichiometry to find the corresponding amount of water formed.

To find the limiting reactant, we compare the moles of each reactant to their stoichiometric ratio in the balanced chemical equation. The balanced equation for the reaction is:

H2SO4 + 2NaOH -> Na2SO4 + 2H2O

Given the masses of sulfuric acid (8.8 g) and sodium hydroxide (9.72 g), we can convert them to moles using their respective molar masses. Then, we compare the moles of the reactants to determine which one is the limiting reactant.

Once the limiting reactant is identified, we use its moles to determine the moles of water produced based on the stoichiometric ratio in the balanced equation. Finally, we convert the moles of water to grams using the molar mass of water (18.015 g/mol) to find the maximum mass of water produced.

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Answer:

no

Explanation:

because the characters are invalid

Answer:

no

Explanation:

because they are not valid

Answer: A Meteor

Explanation:

A streak of light in the sky and says she is seeing a shooting star. She's most likely observing is a meteor. Therefore, option C is correct.

A meteor is an object from space or a meteoroid that touches down on Earth. The air on the space rock creates drag that causes it to become incredibly heated as it falls toward Earth.

When the earth travels through cometary debris during its orbit around the Sun, meteor showers will result. Although the Earth's orbit around the Sun is nearly round, the majority of comets have very elliptical orbits.

A meteoroid becomes a meteor, or a streak of light in the sky, if it gets close enough to Earth and enters its atmosphere. These light striations are sometimes referred to as "shooting stars" due to their appearance. However, stars are not what meteors are.

Thus, option C is correct.

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Answer:

3.6 ×10^23

Explanation:

moles = mass/ molar mass

molar mass= (1×32) +(3×16)= 80

moles = 48/ 80

=0.6

moles = number of molecules/ 6×10^23

number of molecules = moles × 6×10^23

=0.6 × 6×10^23

=3.6 ×10^23

The final temperature of the gas that expands from a volume of 22.4 l at 278k to a volume of 38.3 l will be 475 K.

The volume as well as Kelvin temperature will be directly proportional whenever the pressure on even a sample of such a dry gas remains held constant. PV = k would be the law's equation.

Charle's law give the relation between the temperature and volume is shown as:

\(V_{1} / T_{1} = V_{2} / T_{2}\)

where. V is volume and T is temperature.

Given data :

\(V_{1} =22.4 l\\V_{2} = 38.3 l\\T_{1} = 278 K\\T_{2} = ?\)

Put the value of given data in above equation.

22.4 l /   38.3 l = 278k / \(T_{2}\)

\(T_{2}\) = 475 K.

Therefore, the final temperature will be 475 K.

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Answer:

Arsenic if I understood correctly

Explanation:

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore, the element with atomic number 33 and -3 charge is Arsenic.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state. The element with atomic number 33 and -3 charge is Arsenic.

Therefore, the element with atomic number 33 and -3 charge is Arsenic.

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Explanation:

When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead - the top one pointing right, and the bottom one pointing left.

For example:

ammonium~chloride \rightleftharpoons ammonia + hydrogen~chloride

NH_{4}Cl(s) \rightleftharpoons NH_{3}(g) + HCl(g)

Answer:

B What is the molar mass of M?

Explanation:

The only question that can be answered from the given experiment is "What is the molar mass of M?" The mass of the metallic element (M) and the mass of the compound (MO) can be used to calculate the molar mass of M. The molar mass of M is equal to the mass of M divided by the number of moles of M, which can be calculated from the mass of MO and the molar mass of MO (assuming that all of the M in the original sample reacts to form MO).

The density of M and the melting points of M and MO cannot be determined from the given experiment. Density is a physical property that relates the mass of a substance to its volume, and the experiment does not provide information about the volume of the original sample or the volume of the compound. Melting point is a physical property that describes the temperature at which a substance changes from a solid to a liquid, and the experiment does not provide any information about the temperature at which the original sample or the compound melted.

From the results of the experiment, the following question can be answered: B. What is the molar mass of M?

The student performed the following steps:

1. The student measures the mass of the metallic element (M).
2. The student heats the sample in air, where it completely reacts to form the compound MO.
3. The student measures the mass of the compound MO that was formed.

From these steps, we can determine the mass of oxygen that reacted with the metallic element by subtracting the initial mass of M from the final mass of MO. Then, by using the molar mass of oxygen (16 g/mol) and the mass of oxygen, we can find the moles of oxygen that reacted.

Afterward, we can find the moles of M in the initial sample, as the ratio of M to O in MO is 1:1. Finally, by dividing the initial mass of M by the moles of M, we can calculate the molar mass of M.

However, the experiment does not provide information on the density, and melting points of M or MO, so we cannot answer questions A, C, and D.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

All of the following are qualitative tests that are often used to identify unknown ionic compounds except titration.

Qualitative tests are conducted to determine the presence or absence of certain ions or compounds in a sample based on their characteristic reactions. Common qualitative tests include flame tests, precipitation reactions, color changes, and gas evolution tests.

Titration, on the other hand, is a quantitative technique used to determine the concentration of a specific substance in a solution by reacting it with a standardized solution of another substance. It is not typically used as a qualitative test for identifying unknown ionic compounds.

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As the plane  plane flies at a constant speed of 800 km/hr the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

Speed is defined as the rate of change of distance with time. It has the dimension of distance by time. Thus, the SI unit of speed is given as the combination of the basic unit of distance and the basic unit of Time. Thus, the SI unit of speed is metre per second. In everyday life, kilometre per hour or in countries like US and UK miles per hour are used as the unit of speed.

The SI unit of speed can be derived from the formula of velocity. Basically, velocity is the vector equivalent of speed. Mathematically, velocity is given as the ratio of displacement to the time taken.So, 800 km is traveled in 1 hour so 4200 km will be traveled 4200/800=5.25 which is 5 hours and 25 minutes.

Thus, the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

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An underestimation of the concentration of the NaOH solution would lead to an overestimation of the molar mass of the unknown diprotic acid.

In a titration experiment, the amount of the titrant (NaOH in this case) is used to determine the amount of the analyte (the unknown diprotic acid).

This is based on the stoichiometry of the reaction between the two substances. If the concentration of the NaOH solution is underestimated, it would result in the calculation of a higher volume of NaOH needed to reach the endpoint of the titration.

Since the molar mass of the unknown diprotic acid is calculated using the moles of NaOH and the moles of the diprotic acid from the balanced chemical equation, this error would consequently cause the molar mass of the unknown acid to be overestimated.

It is crucial to accurately determine the concentration of the titrant solution in a titration experiment to avoid errors in the calculated molar mass of the analyte. In this case, the underestimation of the NaOH concentration would negatively affect the accuracy of the molar mass calculation for the unknown diprotic acid.

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Concern of the survey method of research is : 3.)the researcher is dependent on the person answering the survey to be honest.

One concern of the survey method of research is that the researcher is dependent on the person answering the survey to be honest. There is a risk that participants may provide inaccurate or incomplete responses due to range of factors such as social desirability bias, memory recall issues, or misunderstanding of questions.

Therefore, option 3)the researcher is dependent on the person answering the survey to be honest is the most accurate answer.

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Just the atoms that make up a molecule are shown using the empirical formula.

What exactly is an empirical formula?

In contrast to theory or belief, empirical research develops knowledge from actual experience based on observable and quantifiable phenomena.

An empirical formula is a chemical formula for a compound that only specifies the ratios of the elements present in the compound and not the exact number or arrangement of atoms.

Simply displaying the atoms that make up a molecule using the empirical formula is typical. This is useful if you want to recognize the elements you're working with quickly. When determining how many atoms of each element are present, the molecular formula is useful.

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Answer:

A control variable

Explanation:

Answer:

Control variable

Explanation:

Answer:

This is a single replacement reaction because I replaces Br.

Answer: This reaction can'toccur

Explanation

Iodine can't displace Bromine from its compound been less reactive than Br

b

the color of lines

Explanation:

on the atomic spectrum for an atom

Explanation:

Ionic liquids offer numerous advantages over conventional organic solvents for carrying out organic reactions, Malhotra notes. "In many cases, product recovery is easier, catalysts can be recycled, and the ionic liquids can be reused," he says. "In addition, their thermodynamic and kinetic behavior is different.