Construct a Zn2+/Zn−Cu2+/Cu cell with a positive cell potential in the voltaic cells interactive to answer the questions.
a) left to right
b) no movement
c) right to left

The formula of sodium oxide is Na2O .

Answer:

The answer to this is Na2O

The molecular formula for the compound is N10O5.

To determine the molecular formula of the compound, we need to find the ratio between the empirical formula (N2O) and the molecular formula.

The empirical formula mass of N2O can be calculated as follows,

Empirical formula mass = (2 * atomic mass of nitrogen) + atomic mass of oxygen

Empirical formula mass = (2 * 14.01 g/mol) + 16.00 g/mol

Empirical formula mass = 28.02 g/mol + 16.00 g/mol

Empirical formula mass = 44.02 g/mol

Next, we can find the ratio between the molecular mass and the empirical formula mass,

Molecular formula ratio = Molecular mass / Empirical formula mass

Molecular formula ratio = 220 g/mol / 44.02 g/mol

Molecular formula ratio = 5

Since the ratio is 5, it means that the molecular formula contains five times the number of atoms as the empirical formula. Therefore, the molecular formula for the compound is (N2O)5, which can be simplified as N10O5.

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Answer:

Its obvious magnitude is lower than its absolute size (hence brighter). So it's closer to us than 10 parsecs. The apparent magnitude of Betelgeuse is higher (that's why dimmer) than its absolute magnitude, so that even the night sky appears more bright if only 10 par axes are far away.

Explanation:

Answer: Dinitrogen trioxide

Explanation:

Answer:

B) They will react because X and Y can share two pairs of electrons to become stable

Explanation:

The electron configurations of two elements x and y are given :

X: 1s2 2s2 2p6

Y: 1s2 2s2 2p6 3s2 3p6

The statement that is true for both the elements is that, they both will react as they both can share two pairs of electrons to become stable.

To become stable the outermost shell or p orbital should have 8 electrons, so element X  can gain 2 atoms to become stable.

Element Y can also react as it can also share two atoms to fulfill its 3p orbital and will stable.

Hence, the correct option is "B".

Answer:

D. A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.

Explanation:

:)

Answer: The right answer is C!

Explanation: This is 100% right hope its helps! :-D

Answer:

There are nine major kinds of natural resources found on the planet Earth, and all these nine major resources come under two categories, that is, renewable and nonrenewable. The renewable resources refer to the resources that get regenerated again and again over a short time duration. These include five major resources, that is, wind, solar, hydro, geothermal, and biomass.  

On the other hand, nonrenewable energy resources are the ones that are present in a very limited amount, as it takes a very long time to regenerate again. The general kinds of nonrenewable energy resources are nuclear, coal, oil, and natural gas.  

Hence, biomass, solar, and geothermal energy comes under the renewable resources category, and coal, natural gas, and oil come under renewable resources category.  

Answer: the verified answer from an expert.

Explanation:

Answer:

the equation is balanced because there are 8 atoms of carbon, 26 atoms of oxygen, and 20 atoms of hydrogen. on each side of the equation.

PLEASE MARK BRAINLIEST

Answer:

b

Explanation:

got it wrong on edge2020

Answer:

its c because the northern and southern hemisphere get the same amount of energy from the son in march

Answer:

Nitrous oxide

Explanation:

Nitrous+ Oxygen (ygen becomes -ide when it is combined) = Nitrous oxide

just learnt these in school, hope this is correct

hii kiran hru my darling

Answer:

The post-transition metals cluster to the lower left of this line. Metalloids: The metalloids are boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po). They form the staircase that represents the gradual transition from metals to nonmetals.

Explanation: i googled it

The metal that is grouped with metalloids are

A metalloid is a type of element which possesses the characteristics of both the metals and the non-metals.

Metals are those elements that are good conductors of heat and electricity while non-metals are those elements that neither conducts heat nor electricity.

The characteristics of the metalloids listed above are:

Therefore, since these elements share both the properties of metals and non-metals, they are called the metalloids.

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Guidelines for accidental contact is the section in which each type of information can be found on a safety data sheet.

The safety data sheet (SDS) contains details about each chemical's characteristics, potential physical, mental, and environmental health risks, counter measures, and safety instructions for handling, storing, and transporting the chemical.

Guidelines for accidental contact: First aid measures; chemical name; identification of potential hazards; compatibility; handling; PPE; and exposure controls. Hazards and suggestions for chemicals are:

Chemical hazards are various chemical chemicals that can be harmful to human health. The First-Aid Measures are a set of suggestions on how to lessen the consequences brought on by unintentional exposure to a certain chemical threat. Personal protection equipment (PPE) is a category of specially made equipment that shields an employer from workplace safety threats.

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The complete question is

Identify the section in which each type of information can be found on a Safety Data Sheet.

recommendations in case of accidental contact with the chemical Choose...

chemical name and formula Choose...

possible dangers and health effects Choose...

incompatibility or reactivity with other chemicals Choose...

recommended personal protective equipment (PPE) Choose...

Answer:

Explanation:

as we know that 1kg =1,000,000 mg

therefore

0.425 kg= 0.425*1,000,000/1=425000

result:

0.425 kg contain 425000 mg

i hope this will help you

A chemical change occurs when there is a bond breaking or bond making. A phase change, change in phase and or change in shape does not make a chemical change. A chemical change can be indicated by the heat given off by a reaction or change. Thus, option a is correct.

There are broadly two types of change occurs for a substance namely chemical change or physical change. A physical change is a change in state or phase involves no formation products or breaking of bonds. For example melting of a solid to liquid and boiling of liquid to gas etc.

In a chemical change there makes a bond breaking or making to form a new product. All chemical reactions such as combination reactions, decomposition, displacements etc. are chemical changes.

Every chemical change is associated with an enthalpy of heat energy that is absorbed or released by the system. Thus heat given off is an indication of a chemical change. Hence, option A is correct.

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Answer:

1. It is stoichiometric.

2. O2 is the limiting reactant.

3. 9.0 g of C2H6 remain unreacted.

4. 17.6 g of CO2.

5. 85.2%.

Explanation:

Hello there!

In this case, for the given chemical reaction:

\(2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O\)

We can see that:

1. It is stoichiometric and is balanced because the reactants yields the products according to the law of conservation of mass.

2. In this part, it is possible to calculate the moles of ethane by using its molar mass:

\(n_{C_2H_6}=15g*\frac{1molC_2H_6}{30.08g} =0.50molC_2H_6\)

And the moles of oxygen by knowing that one mole is contained in 22.4 L at STP:

\(n_{O_2}=\frac{1mol}{22.4L} *15.68L=0.7molO_2\)

Thus, by calculating the moles of carbon dioxide product by each reactant, we can identify the limiting one:

\(n_{CO_2}^{by\ C_2H_6}=0.50molC_2H_6*\frac{4molCO_2}{2molC_2H_6} =1.0molCO_2\\\\n_{CO_2}^{by\ O_2}=0.70molO_2*\frac{4molCO_2}{7molO_2} =0.4molCO_2\\\)

Thus, since oxygen yields the fewest moles of CO2 product, we infer it is the limiting reactant.

3. In this part, we calculate the mass of C2H6 that actually react first:

\(m_{C_2H_6}^{reacted}=0.4molCO_2*\frac{2molC_2H_6}{4molCO_2}*\frac{30.08gC_2H_6}{1molC_2H_6} =6.0gC_2H_6\)

Thus, the leftover of ethane (C2H6) as the excess reactant is:

\(m_{C_2H_6 }^{leftover}=15g-6.0g=9.0g6.0C_2H_6\)

4. Since 0.4 moles of carbon dioxide were produced, we use its molar mass to calculate the mass as its theoretical yield:

\(m_{O_2}^{theoretical}=0.4molCO_2*\frac{44gCO_2}{1molCO_2}=17.6gCO_2\)

5. Finally, the percent yield is gotten by dividing the actual yield by the theoretical one:

\(Y=\frac{15g}{17.6}*100\%\\\\Y=85.2\%\)

Best regards!

To convert an aldehyde to a carboxylic acid, oxidation of the aldehyde functional group is required.

There are several reagents that can be used for this conversion:

1. Strong Oxidizing Agents:

  - Potassium permanganate (KMnO4): In the presence of acidic conditions, KMnO4 can oxidize aldehydes to carboxylic acids.

  - Chromic acid (H2CrO4): It is a strong oxidizing agent that can convert aldehydes to carboxylic acids.

2. Tollens' Reagent:

  Tollens' reagent, also known as silver mirror reagent, is a solution of silver nitrate (AgNO3) and ammonia (NH3) in water. It can oxidize aldehydes to carboxylic acids under mild conditions. It produces a silver mirror on the inner surface of the reaction vessel.

3. Jones Reagent:

  Jones reagent consists of a solution of chromium trioxide (CrO3) in diluted sulfuric acid (H2SO4). It is a strong oxidizing agent that can convert aldehydes to carboxylic acids.

These are some commonly used reagents to convert aldehydes to carboxylic acids through oxidation. The choice of reagent may depend on factors such as reaction conditions, desired selectivity, and other functional groups present in the molecule.

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Answer:

There are a total of 46 outer columns and 19 inner ones so a total of 65

Explanation:

Answer:

in 1983, Lake Mead had a recorded water level of 1,225 feet above sea level. The closest it's been to that level in modern times was in 2000. Explanation:

Answer:

1 mole

Explanation:

Given parameters:

Mass of sulfur = 32.066g

Unknown:

Number of moles of sulfur = ?

Solution:

The number of moles of sulfur can be determined using;

  Number of moles  = \(\frac{mass}{molar mass}\)  

 Molar mass of sulfur  = 32g/mol

     Number of moles  = \(\frac{32.066}{32}\)   = 1 mole

Burying all of the methanol results in a hotter temperature so because flaming is attempting to ignite the dried salts.

That's because as the methanol is eaten to the finish, the flame approaches the dry salts and attempts to ignite them.

It is therefore critical to extinguish the flame even before methanol is entirely consumed.

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Answer:

Yea.....where is the article and the 6 questions?

Answer:

Answering

Explanation:

do u want us to tell u what we got?

The percentage of volume of ethanol is 9.5%.

Volume/volume percentage (v/v% or percent v/v) is a unit used to express how much of a material is present in a solution. It is defined as the volume of the solute divided by the sum of the volumes of the solution, multiplied by one hundred. Examples: The average alcohol concentration (v/v%) of wine is 12 percent.

The formula used to get the volume of ethanol in percentages is

Percent of volume of ethanol = (volume of solute / total volume) *  100

Percent volume of Ethanol = (volume of ethanol  / total volume)  * 100

                                            =  95mL  / 1000mL  *  100

                                            = 9.5%

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Effusion is the process by which a gas escapes through a tiny hole or porous material into a region of lower pressure. The rate of effusion is directly proportional to the average speed of the gas particles, which in turn is related to their molecular weight. The ratio of the rate of effusion of CO₂ to that of He is 0.302.

The rate of effusion is inversely proportional to the square root of the molar mass of a gas. The molar mass of CO₂ is 44.01 g/mol, while the molar mass of He is 4.00 g/mol. Thus, the square root of the molar mass of CO₂ is √44.01 = 6.63 g/mol, and the square root of the molar mass of He is √4.00 = 2.00 g/mol.

Using the equation for the ratio of the rates of effusion, we get:

Rate of CO₂ effusion / Rate of He effusion = √(Molar mass of He) / √(Molar mass of CO₂)

= 2.00 / 6.63 = 0.302

Therefore, the ratio of the rate of effusion of CO₂ to that of He is 0.302.

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Based on the information given, the mole should be considered a base unit in the SI system because it serves as a universally accepted measure of the amount or quantity of substances.

The mole of a substance is the amount of a substance that contains as many elementary particles as there are in 12 g of carbon-12.

12 g of carbon-12 contains the Avogadro number of particles which equals 6.02 * 10²³ particles.

Hence, a mole of a substance is the amount of that substance that contains  6.02 * 10²³ elementary particles of that substance.

SI units refer to units of measurement that are universally accepted for measuring the properties of quantities of objects.

Some SI unit values include:

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Answer: The percentage by volume of alcohol will be 21%.

Explanation:

Given: Volume of solute = 14.7 \(cm^{3}\)

Volume of solvent = 70 \(cm^{3}\)

Formula used to calculate percentage by volume is as follows.

\(Percentage volume = \frac{volume of solute}{volume of solvent} \times 100\)

Substitute the values into above formula as follows.

\(Percentage volume = \frac{volume of solute}{volume of solvent} \times 100\\= \frac{14.7 cm^{3}}{70 cm^{3}} \times 100\\= 21 percent\)

Thus, we can conclude that the percentage by volume of alcohol will be 21%.

Answer:

I had this same question

Explanation:

The answer is either one, because they both warm up at about the same rate.

Answer:

The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.

Answer:

light babsbabsbab

Explanation:

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