Which is the MOST important safety measure to follow when using an acid in a classroom laboratory?

1. Rate law - A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation.

Step (1) is the rate-determining step because it is the slow step, it determines the reaction's overall pace; therefore,

Rate law= K [H₂O₂]  [I⁻]

2. order of reaction = second order

The Order of Reaction describes how the rate of a reaction depends on the concentration of each component. As a result, the rate of a first-order reaction depends on the concentration of a single species.

3. First step is the rate determining step because it is the slow step. Slow step determines the rate.

The rate-determining step is the one that establishes the speed (rate) of the complete chemical reaction.

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Your question is incomplete. For missing part refer the image below.

Answer: I think it's C

Explanation:

Probably wrong. I have a different type of chemistry.

Taking into account definition of percent yield, the mass of calcium nitride formed is 102.614 grams.

In first place, the balanced reaction is:

3 Ca + N₂ → Ca₃N₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 28 grams of N₂ reacts with 120.24 grams of Ca, 41.7 grams of N₂ reacts with how much mass of Ca?

mass of Ca= (41.7 grams of N₂× 120.24 grams of Ca) ÷28 grams of N₂

mass of Ca= 179.07 grams

But 179.07 grams of Ca are not available, 96 grams are available. Since you have less mass than you need to react with 41.7 grams of N₂, Ca will be the limiting reagent.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 120.24 grams of Ca form 148.24 grams of Ca₃N₂, 96 grams of Ca form how much mass of Ca₃N₂?

mass of Ca₃N₂= (96 grams of Ca× 148.24 grams of Ca₃N₂)÷ 120.24 grams of Ca

mass of Ca₃N₂= 118.355 grams

Then, 118.355 grams of Ca₃N₂ can be produced from 96.0 g of calcium and 41.7 g of nitrogen gas.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage and it is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= (actual yield÷ theoretical yield)×100%

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product.

In this case, you know:

Replacing in the definition of percent yields:

86.7%= (actual yield÷ 118.355 grams)×100%

Solving:

86.7%÷ 100%= actual yield÷ 118.355 grams

0.867= actual yield÷ 118.355 grams

0.867× 118.355 grams= actual yield

102.614 grams= actual yield

Finally, the mass of calcium nitride formed is 102.614 grams.

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So the total volume is 1035 cubic meters. A tennis ball, according to the International Tennis Federation (ITF), has the official diameter of 6.54–6.86 cm.

The International Tennis Federation (ITF) is the organization in charge of wheelchair tennis, beach tennis, and international tennis. The International Lawn Tennis Federation was established in 1913 by twelve national tennis associations. The ITF has 211 national associations and six regional associations as of 2016.

The ITF's governance duties include upholding and implementing tennis regulations, overseeing global team events, marketing the game, and protecting the integrity of the sport through anti-doping and anti-corruption initiatives. The Women's Tennis Association (WTA) and the Association of Tennis Professionals (ATP) are partners with the ITF in governing professional tennis.

The ITF coordinates annual team tournaments for men's (Davis Cup), women's (Billie Jean King Cup), and mixed teams (Hopman Cup) as well as the Grand Slam events.

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Time did it take a little debbie to run 15 m if she was running 3 m/s is 5 sec.

debbie  running speed = 3 m/s

so,

in one meter = 1/3 sec

we have to calculate the time taken by little debbie to run 15 meters ,

therefore,

Time = distance / speed

time take by debbie to run 15 m = 15 / 3 sec

                                                     = 5 sec.

so, time taken by little dubbie to cover the distance of  15 meter is 5 sec.

Hence, Time did it take a little debbie to run 15 m if she was running 3 m/s is 5 sec.

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The molecular formula of the given structure is C₁₀H₁₃N₅O₄ and its formula mass is 267 amu.

A molecule's formula mass (also known as formula weight) is the sum of the atomic weights of the atoms in the compound's empirical formula. The formula mass is expressed in atomic mass units (amu).

From the structure of the molecule, we can easily identify the molecular formula of the structure:

Therefore, the molecular formula of the given structure is C₁₀H₁₃N₅O₄.

Now,

Mass of Carbon = 12.011 u

                            = 10 × 12.011 u

                           = 120.11 u

Mass of Hydrogen = 1.00784 u

                              = 13 × 1.00784 u

                             = 13.10192 u

Mass of Nitrogen = 14.0067 u

                            = 5 × 14.0067 u

                            = 70.0335 u

Mass of Oxygen = 15.999 u

                           = 4 × 15.999 u

                           = 63.996 u

Formula mass of C₁₀H₁₃N₅O₄ = 120.11  + 13.10192 + 70.0335 + 63.996

                                                = 267.24142 u

Thus, the formula mass of the given structure i.e., C₁₀H₁₃N₅O₄ is 267.24142 u

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A proton has a charge of +1 and is larger in size then an electron.

Negatively charged electrons typically orbit the atomic nucleus of an atom. Protons and neutrons are substantially larger than electrons. Their charge is as powerful as a proton despite their small size; hence one proton and one electron will cancel each other out. Protons have a mass of 1 atomic mass unit (amu), or around 1.671027 kilograms, and a positive electrical charge of 1 (+1). Electrons are negatively charged particles, but protons are positively charged particles. The magnitude of the charge of an electron and a proton is the same, which is 1.6×10−19C. Electrons revolve around the nucleus of an atom in discrete orbits, but the protons reside inside the nucleus of the atom.

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Molar volume of hydrogen gas is because 'some bubbles of hydrogen gas remained clinging to the sides of the tube'

The volume occupied by 1 mole of the molecules of a gas at STP i.e. standard temperature and pressure

Here if liquid is not vaporized completely then bubbles of hydrogen gas remained clinging to the sides of the tube and then the condensed vapor in the flask contains the air which is initially occupied before the liquid is heated and when calculating the molar mass of the vapor the moles of air which are initially present are not excluded, so that the molar mass of the vapor would be increase in large value

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Answer:

5.3x1022 atoms

Explanation:

If we were to represent five grams of iron in term of the number of atoms of iron, we would get 5.3x1022 atoms of iron.

As per conversion units, 45.3 grams is each person's final serving of 1 burger.

As 1 burger has a weight of 1 pound which is equal to 453 grams ,and as each burger looses 10% of it's weight while cooking .

So the weight of 1 burger after cooking is,

10/100×453=45.3 g

Thus,each person's final serving of 1 burger is 45.3 grams.

Conversion  units or unit conversion expresses the same property with a different unit of measurement.It is a numerical expression or a number that is used to change  one set of units to another.

It usually occurs through multiplicative conversion factors through which the measured quantity is changed without changing it's effects.

There are different conversion systems such as:

1) SI system

2)CGS system

3)MKS system

4) FPS system

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The molarity of the chloride ion in the sea water is 0.024 M

We'll begin by obtaining the volume of the sea water. This can be obtained as follow:

Density = mass / volume

Thus,

Volume = mass / density

Volume of water = 1000 / 1.035

Volume of water = 966.18 mL

Next, we shall determine the mole of the chloride ion. This is illustrated below:

Mole = mass / molar mass

Mole of chloride ion = 0.825 / 35.5

Mole of chloride ion = 0.0232 mole

Molarity = mole / volume

Molarity = 0.0232 / 0.96618

Molarity = 0.024 M

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The molecular formula is a notation indicating the number of atoms of each element present in a compound.

The molecular formula of a compound with given empirical formula can be calculated as follows:

molecular formula = (empirical formula)n

The molecular formula of the given compound is as follows:

(SF5)n = 254.1

{32 + 19(5)}n = 254.1

127n = 254.1

n = 2

Molecular formula = (SF5)₂ = S₂F₁0

(CH₂O)n = 180.156 amu

{12 + 2 + 16}n = 180.156

(30)n = 180.156

n = 6

Molecular formula = (CH₂O)₆ = C₆H₁₂O₆

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Answer:The right answer is they don’t belong with it

Explanation:He didn’t cause

Answer:

reactivity, flammability and the ability to rust

Explanation:

reactivity is the ability of matter to react chemically with other substances

flammability is the ability of matter to burn

Answer:

How many atoms are in a mole of silver?

From Avogadro's number, we know that one mole of silver atoms is equal to 6.02 times 10 to the 23rd silver atoms

Explanation:

The reaction condition making use of hydrazine (NH₂-NH₂) and hydroxyl ions cannot be used for the mentioned transformation.

Which catalysts are used for conversion of nitro compound to aniline?

Catalysts used for the reduction of nitro compound to aniline are palladium catalysts ,although iron and nickel along with HCl can also be used as they all belong to d-block of the periodic table, which are well-known for their properties to be used as a catalyst.

Hydrazine cannot be used as a catalyst for the conversion of nitro compound to aniline as it is expensive as well as poisonous. Catalysts which are to be used for such conversions must be cost effective and safe to handle.

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The compressibility of gases is more difficult than that of liquids. Because, the intermolecular forces in gases is very less and to compress the diffused gas molecules high pressure have to be applied.

Compressibility of a substance is the ability to compress to decrease its volume under high pressure. It is dependent on the intermolecular force in the substance.

In liquids unlike solids there is some space for the particles to move apart and that is why liquid can flow. In the case of gases, this distance between particles is greater and particles are free to spread everywhere. Therefore, the intermolecular attraction is very less in gaseous substances.

To compress the substance, the force of attraction between particles have to be increased and volume have to be decreased.  Therefore, it is too difficult to compress gases, in which particles are far apart from each other.

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Group behavior is also known as collective behavior, which increases the chances of species to reproduce and survive because they rely on one another to carry out actions essential for their survival like hunting, migration, and breeding.

Ethologists claim that social organisms rely heavily on other group members to survive.

The basic example of group behavior is a school of fish. These little fish species congregate in huge groups and travel great distances in search of food. When more people joined the group, researchers from Princeton University found that their ability to maintain orientation improved, making them more receptive to their surroundings.

Moreover, there are many pieces of evidence that show orcas (killer whales), which are highly sociable animals, form big pods of 20–30 people and 'plan' their hunting techniques. Younger individuals are also taught essential hunting techniques by older females who swim with them.

Conclusion: Social organisms that travel in groups rely on all members to carry out crucial behaviors that, if they didn't, would cause a significant decline in their populations because they couldn't feed or reproduce as successfully on their own as they could with the group's "help."

The link to the source is:- Couzin, I.D. (2018) Collective animal migration, Current Biology 28(17), R976-980.

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The 3 main layers of earth has its own features, as follows;

The earth is known to be a kind of  fragmental particles that are made up of different part of the surface of the globe.

Note therefore, The 3 main layers of earth has its own features, as follows;

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On converting 167 mL/h , we get 4.008 L/d

Converting 167 mL/h to units of liters per day

1L=1000mL

1d=24hrs

So  167 mL/1h x1L/1000mLx24h/1d=4008L/1000d

=4.008 L/d

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Answer:

which question doyou need the answer?

Formula weight of NH4F is 37.037 g/mol

The total of the atomic weights in the empirical formula of the compound is the formula mass, often referred to as formula weight, of a molecule. Atomic mass units are used in the formula for weight (amu)

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All of the Bg atoms (beans) are 9.689 atoms

Butyl glycol  is a clear, colorless, oily liquid with a unique sweet yet mild odor and has the formula C₆H₁₄O₂ it is a butyl ether of ethylene glycol and is miscible with water and common organic solvents it has been produced industrially for over half a century and is used primarily as a solvent in paints and surface coatings but also in inks and cleaning products.

Here given sample is Bg element bag and weigh = 0.01 g

Bg means butyl glycol atomic mass of butyl glycol is 62.07g/mol

So here to find atom;

0.01/atomic mass×6.02×10²³

0.01/62.07g/mol×6.02×10²³

= 9.698 all atoms of bg (bean)

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The Volume of the box is 93.0 in³ to three significant figures.

The volume of the box is the amount of space that the box contains or occupies.

The volume of the box is determined using the following formula:

Volume of box = length * width * height

The length of the box, l = 2.20 in

The width of the box, w = 3.71 in

The height of the box, h = 10.4 in + 1 in

The height of the box, h = 11.4 in

Volume of the box = 2.20 * 3.71 * 11.4 in³

Volume of the box = 93.0 in³

In conclusion, the volume of the box is calculated from the product of the height and width and length of the box.

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The density of the metal in units of grams per milliliter is 11.31 g/mL

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

The following data were obtained from the question:

Density = mass / volume

Density of metal = 23.7412 / 2.1

Density of metal = 11.31 g/mL

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Answer:

A. 3.7×10^-5 km

Explanation:

Whenever there is scientific notation, you always move the decimal the amount of places that the exponent tells you. For a, you would move the decimal 5 times to the left and the km version will be equivalent to the cm version. I hope this helps!

The quantity is equivalent to 3.7 cm is  3.7×10⁻⁵ km. Therefore, option A is correct.

The term scientific notation is defined as a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.

For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.

Scientific notation is used to simplify numbers that are too big.

In the scientific notation, you always displace the decimal the amount of places that the exponent tells you. Then would move the decimal 5 times to the left and the km version will be equivalent to the cm version.

Thus, The quantity is equivalent to 3.7 cm is  3.7×10⁻⁵ km, option A is correct.

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