a 500. gram iron ore sample was determined to contain 242 grams of iron. what is the mass percent of iron in the ore? a 500. gram iron ore sample was determined to contain 242 grams of iron. what is the mass percent of iron in the ore? 51.6 48.4 32.6 93.7 none of the above

Answer:

a; increasing fraction

Explanation:

Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature.

Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature. The following are some of the ideal circumstances for strong plant growth: Air temperature: 24 °C Day/ 19 °C Day (75F/65F) H2O temperature: cold at 26 °C, hot at 24 °C, not to exceed 25 °C. Minimum of 50 and no more than 70% relative humidity These fundamental resources for the food-producing industry, according to Perrin, include land, water, and other natural resources as well as important aspects like climate and ecological resilience. Environmental elements include air, water, soil, climate, native plants, and landforms. By definition, environmental factors have an impact on daily life and are a significant contributor to the disparities in health that exist between different geographic regions.

Learn more about Solar radiation here:

https://brainly.com/question/23338147

#SPJ4

Option c) NH4Cl will hydrolyze when dissolved in water.

Hydrolysis is a chemical reaction that occurs when a salt reacts with water, resulting in the formation of an acidic or basic solution. In this case, when NH4Cl (ammonium chloride) is dissolved in water, it undergoes hydrolysis.

The ammonium ion (NH4+) is the conjugate acid of ammonia (NH3), which is a weak base. When NH4Cl dissociates in water, the ammonium ion reacts with water to form NH3 and H3O+ (hydronium ion). This process is called hydrolysis.

NH4+ (aq) + H2O (l) ↔ NH3 (aq) + H3O+ (aq)

The formation of NH3 leads to an increase in the concentration of hydroxide ions (OH-) in the solution, making it slightly basic. At the same time, the presence of H3O+ ions makes the solution slightly acidic. Therefore, the hydrolysis of NH4Cl results in a slightly acidic and slightly basic solution.

In contrast, salts like NaCl and KCl do not undergo hydrolysis when dissolved in water because they consist of cations (Na+ and K+) and anions (Cl-) that do not react with water to form acidic or basic species.

Na2SO4 (sodium sulfate) is also an example of a salt that does not undergo hydrolysis. The sulfate ion (SO42-) does not react with water to form acidic or basic species, so the solution remains neutral.

Therefore, among the given options, only NH4Cl undergoes hydrolysis when dissolved in water.

Know more about Hydrolysis here:
https://brainly.com/question/30468294

#SPJ8

The question is incomplete. Find the full content below:

Which one of the following salts when dissolved in water will hydrolyse?

a) NaCl

b) KCl

c) NH4Cl

d)Na2SO4

Answer:

the answer would be B

Explanation:

Answer:

B. D I got it right on the test.

TNT (Trinitrotoluene) has relatively small energy per pound, but it is a very effective explosive due to the following reasons:

1. It is an insensitive explosive: TNT has a high ignition temperature, making it less prone to accidental detonation. TNT can also resist shock and friction, making it a stable explosive.

2. High detonation velocity: TNT is capable of detonating at a speed of 6,900 m/s. This high velocity allows TNT to produce a supersonic shockwave that can cause significant damage to its surroundings.

3. High gas yield: When TNT explodes, it produces a large amount of gases, which further increases the pressure exerted on its surroundings. This high-pressure shockwave causes significant damage to buildings and structures.

4. Easy to manufacture: TNT is relatively easy and cheap to manufacture, making it a popular explosive for military and industrial applications.

To know more about ignition temperature, visit:

https://brainly.com/question/31030276

#SPJ11

Answer:

0.68 centiseconds

Explanation:

I looked it up

Answer:

The person above is correct 6800 converted to centiseconds is .68

Explanation:

you have to divide x by 10000 to convert it into centiseconds

in this case x=6800

6800÷10000= 0.68

Answer:

b it seems like the only one that makes sense

the correct answer is b, I just took the quiz and the other answer on this question was correct

The guideline that is recommended for a nurse who is collecting a stool specimen of a client suspected of having clostridium difficile includes the following procedures:

1. Use a new pair of gloves for each step in the process of specimen collection, removing the old gloves each time.

2. A bedpan is provided by the nurse for the client to have a bowel movement.

3. The bedpan is then thoroughly washed, disinfected, and dried.

4. The client's buttocks are washed with warm, soapy water and dried with a clean towel.

5. The nurse wears gloves to remove the stool specimen from the bedpan.

6. The specimen is placed in a sterile container and taken to the laboratory as soon as possible.

7. The nurse takes care to avoid touching any part of the specimen container that will come in contact with the laboratory personnel.

The nurse should adhere to standard infection control procedures to protect both the nurse and the client from potential infection. The nurse should make certain to wash their hands before and after the procedure. A stool sample is usually the best way to confirm the diagnosis of Clostridium difficile infection. It can be challenging to diagnose C. difficile infection in the early stages.

To know more about clostridium difficile visit

https://brainly.com/question/13552507

#SPJ11

Answer:

Susan is right

Explanation:

Honey is a natural substance extracted from bees. Like every other natural substance, honey is a mixture of many different substances. An analysis of the so called 'pure honey' will reveal that many chemical species compose the natural substance called honey.

Hence Susan is right when she says that honey is not really pure but a mixture of substances.

Calcium carbonate (CaCO3) is an important component of coral reefs. 0.986 moles are in 98.6 g of CaCO3.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

Number of moles of CaCO3 = Mass / Molar mass

Number of moles of CaCO3 = 98.6 g / 100g/ mol

= 0.986 moles

The balanced chemical equation of this reaction is as follows:

CaCO₃ → CaO + CO₂

Therefore, the reaction ratio is 1:1:1.

So, 0.986 moles of CaO are formed.

Thus, 98.6 g CaCO3 = 0.986 moles CaCO3.

To learn more about the mole, follow the link;

https://brainly.com/question/26416088

#SPJ1

Answer:

yes

Explanation:

the energy released in the synthesis of water is equal to the energy absorbed in the decomposition of water. This outcome happens because the difference in energy between the reactants and the products in both cases is equal. . It follows the law of conservation of energy.

Answer:

chemical formula

Explanation:

Answer:

0.96

Explanation:

Number of moles of Fe(III) = 3/1000 *  0.002 M = 6 * 10^-6 moles

Number of moles of SSA = 7/1000 * 0.02 = 1.4 * 10^-4 moles

Total number of moles =  6 * 10^-6 moles +  1.4 * 10^-4 moles

Mole fraction of SSA = number of moles of SSA/ total number of moles.

Mole fraction of SSA =  1.4 * 10^-4 moles/  6 * 10^-6 moles +  1.4 * 10^-4 moles

Mole fraction of SSA = 0.96

Answer:

the water repels the pencil

Explanation:

Since the an electrically charged pencil is placed close to the water running from a faucet :D

Answer:

Option 2

Explanation:

:)

Explanation:

ok so I believe:

a. increase in atomic radii going down a group and decrease going across a period.

b. increase in IE1 going across a period and up a group. the highest IE1 elements are like He, Ne, F and first ionization energy decreases moving further away from those elements moving south west on the periodic table.

c. electron affinity increases moving across a period left to right.

d. ionic radii increases going down a group and decreases going across a period left to right

e. electronegativity increases across a period but decreases down a group. (opposite for electropositivity)

what is meant by the d-block elements? are you referring to the spdf location?

Answer:

1. direct current. 2. electrical power

Explanation

i believe number 2 is right

The concentration 103 g \(KCl\) in 628 g \(H_2O\) is 14.1% by mass

The concentration 30. 3 mg \(KNO_3\) in 9. 29 g \(H_2O\) is 0.325% by mass.

The concentration 9. 18 g \(C_2H_6O\) in 72. 2 g \(H_2O\) is 11.3% by mass.

To calculate the concentration of a solution in mass percent, we need to determine the mass of the solute and the mass of the solution. The mass percent is then calculated as:

Mass percent = (Mass of solute / Mass of solution) x 100%

Part A:

Mass of \(KCl\)= 103 g

Mass of \(H_2O\) = 628 g

Mass of solution = Mass of \(KCl\) + Mass of \(H_2O\) = 103 g + 628 g

                                                                              = 731 g

Mass percent of \(KCl\) = (103 g / 731 g) x 100% = 14.1%

Therefore, the concentration of the \(KCl\) solution is 14.1% by mass.

Part B:

Mass of \(KNO_3\) = 30.3 mg = 0.0303 g

Mass of \(H_2O\) = 9.29 g

Mass of solution = Mass of \(KNO_3\) + Mass of \(H_2O\) = 0.0303 g + 9.29 g

                                                                                 = 9.3203 g

Mass percent of \(KNO_3\) = (0.0303 g / 9.3203 g) x 100%

                                       = 0.325%

Therefore, the concentration of the \(KNO_3\) solution is 0.325% by mass.

Part C:

Mass of \(C_2H_6O\) = 9.18 g

Mass of \(H_2O\) = 72.2 g

Mass of solution = Mass of \(C_2H_6O\) + Mass of \(H_2O\) = 9.18 g + 72.2 g

                                                                                   = 81.38 g

Mass percent of \(C_2H_6O\) = (9.18 g / 81.38 g) x 100%

                                       = 11.3%

Therefore, the concentration of the \(C_2H_6O\) solution is 11.3% by mass.

Learn more about Mass percent at

brainly.com/question/5394922

#SPJ4

Answer:

280 g Al₂O₃

Explanation:

To find the mass, you need to multiply the given value by the molar mass. This will cause the conversion because the molar mass exists as a ratio; technically, the ratio states that there are 101.96 grams per every 1 mole Al₂O₃. It is important to arrange the ratio in a way that allows for the cancellation of units. In this case, the desired unit (grams) should be in the numerator. The final answer should have 2 sig figs to reflect the given value (2.7 mol).

Molar Mass (Al₂O₃): 101.96 g/mol

2.7 moles Al₂O₃          101.96 g
------------------------  x  -------------------  = 275 g Al₂O₃  = 280 g Al₂O₃
                                     1 mole

Answer: 43.8 Volts

Explanation:

Ohms law states that current is directly proportional to voltage applied.

\(V=I\times R\)

where V = voltage = ?

I = current = 0.73 A

R = resistance = 60 ohm

Putting in the values we get:

\(V=0.73A\times 60ohm=43.8V\)

Thus the voltage of the battery is 43.8 Volts

2-propanol had a lower δt value compared to 1-propanol because of its different molecular structure.

The difference in δt values between 2-propanol and 1-propanol can be attributed to the position of the hydroxyl group (-OH) in the molecule. In 2-propanol, the hydroxyl group is attached to the middle carbon atom, while in 1-propanol, it is attached to the terminal carbon atom.

This difference in molecular structure results in varying intermolecular forces, leading to different boiling points and evaporation rates. 2-propanol has stronger intermolecular forces due to the increased branching, which means it evaporates more slowly and has a lower temperature change (δt) value.

The δt value of 2-propanol is lower than that of 1-propanol because its molecular structure creates stronger intermolecular forces, resulting in a slower evaporation rate and a smaller temperature change.

For more information on molecular structure kindly visit to

https://brainly.com/question/29857692

#SPJ11

The possible way to describe the \(SO_3\) component in the reaction would be 8 molecules or 8 atoms of \(SO_3\), Options 1 and 2.

Each component of a reaction has its state. Recall that matters are anything with weight and occupies space.  

In the reaction: \(S_8 (s) + 12O_2(g) -- > 8SO_3(g)\)

Eight moles of sulfur react with 12 moles of oxygen molecules to produce 8 moles of sulfur (III) oxide. According to the reaction:

The amount of gas can be described in terms of its number of molecules and its number of atoms. Thus, either 8 molecules or 8 atoms of sulfur (III) oxide can be used to describe the amount of \(SO_3\) produced in the reaction.

More on states of matters can be found here: https://brainly.com/question/29476563

#SPJ1

15.90 g mass of oxygen gas is consumed by the reaction of of ammonia. when Ammonia chemically reacts with oxygen gas to produce nitric oxide and water.

The mole is the fundamental unit of measurement in SI units for the amount of substance. It is defined as the mass of substance containing in the same number of particles found in 12.000 g of carbon atom (12C).

The molar mass is defined as the sum of masses of the atoms or molecules expressed in grams, and it is contributed by one mole of an atom or molecule.

The significant figures of a number are digits that carry meaning contributing to their measurement resolutions. The number of significant figures indicates the precision of a measurement instead of its magnitude. There are certain rules to determine significant digit.

The number of moles is calculated by the formula as follows:

Number of moles = given mass(g/molar mass(g/mol)

Step: 1

The reaction is as follows:

4NH3+5O2⟶4NO+6H2O

Here, the reactants are ammonia and oxygen and the product formed include nitric oxide and water. More precisely we can say that, 4 moles of ammonia react with 5 moles of oxygen to give 4 moles of nitric oxide and 6 moles of water.

Hint:

Find the mass of oxygen gas.

Step: 2

Consider the reaction as follows

4NH3+5O2⟶4NO+6H2O

Weight of 4 moles of ammonia = 4×17

=68g

Weight of 5 moles of oxygen = 5×32

=160g

Here

4 moles of ammonia ≡ 5 moles of oxygen

Therefore:

68 g of ammonia ≡ 10 g of oxygen

Therefore,

The mass of oxygen corresponding to 6.76 g of ammonia is calculated as follows:

mass of oxygen = 6.6g×160g / 68g

=15.90 g

Initially, the chemical reaction is considered. From that, it is clear that

4 moles of ammonia ≡ 5 moles of oxygen

Therefore,

68 g of ammonia ≡ 160 g of oxygen

Then, the mass of oxygen corresponding to 6.76g of ammonia is calculated by multiplying 6.76g with 160 g of oxygen and divided by the answer with 68 g. The mass of oxygen corresponding to 6.76g of ammonia is 15.90 g

The mass of oxygen corresponding to 6.76 g of ammonia is 15.90 g.

Learn more about Oxygen here:

https://brainly.com/question/13370320

#SPJ4