Which of the following is not a characteristic of a compound?
can be decomposed into simpler substances by chemical changes
can be separated by physical means
always in a definite ratio
can obtain new properties by chemical means

while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

How to solve the problem?

The statement that is NOT true of zinc is "Grains are the most reliable food sources of zinc." While grains can be a source of zinc, they are not necessarily the most reliable source.

Zinc is an essential mineral that plays important roles in many biological processes, including immune function, protein synthesis, wound healing, and DNA synthesis. It is involved in various enzymatic reactions, and acts as a cofactor for many enzymes. Zinc is also important for proper growth and development, especially during childhood and adolescence.

Excess zinc intake can lead to decreased copper absorption, as both minerals compete for absorption in the intestines. This can lead to copper deficiency, which can cause anemia neutropenia, and other health problems. Therefore, it is important to maintain a balance between zinc and copper intake.

While grains can be a source of zinc, other foods such as meat, seafood, and dairy products are also good sources. Vegetarians and vegans may need to pay particular attention to their zinc intake, as plant-based sources of zinc may be less bioavailable than -based sources. Zinc supplements can also be used to prevent or treat deficiencies, but should be used with caution as excessive intake can have negative health effects.

In summary, while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

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Answer:  1,950 N

Explanation:

2812.5N of force is needed to accelerate a 1,875 kg object at a rate of 1.5 m/s².

HOW TO CALCULATE FORCE:

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765.75

................................

Answer:

After the 4s sublevel is filled with two electrons, ten electrons fill the 3d sublevel, which is slightly higher in energy than the 4s sublevel. After the 3d sublevel is filled, the remaining three electrons will be in orbitals in the 4p sublevel. Thus, the electron configuration for arsenic is [Ar] 4s(2 squared) 3d(10 squared) 4p(3 squared).

Answer:

the melting process begins right away because the air temperature around the ice cubes is warmer than the temperature in the freezer

Answer:

Which general formula represents the functional group in a carboxylic acid?

❌ A) ROH

❌ B) RCOOR

❌ D) RCHO

I Took Question Test And Have Day.

Carboxylic acids are organic acids containing carbon , hydrogen and oxygen. They have the general formula RCOOH, where, R is any alkyl chain.

Carboxylic  acids are organic acids with the general formula RCOOH, where R can be any alkyl groups like methane, ethane, propane etc. They have entirely different chemical properties from that of inorganic acids.

The first member of the carboxylic acid series is forming acid where R is hydrogen thus having the formula HCOOH. Next is acetic acid with the formula CH₃COOH.

ROH is the general formula of alcohols and RCOOR is ester. RCHO is aldehydes. Therefore, option c RCOOH is the general formula of carboxylic acids.

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Answer:

3 Covalent Bonds and 1 Co ordinate Bond

Explanation:

4 bonds are in NH4¹+

NH4¹+ is the ammonium ion, which consists of a central nitrogen atom (N) and four hydrogen atoms (H). Nitrogen is located in group 15 of the periodic table and has 5 valence electrons. Hydrogen, on the other hand, has 1 valence electron.

To achieve a stable electron configuration, nitrogen needs to share electrons with the hydrogen atoms. Each hydrogen atom can form a single bond with the nitrogen atom by sharing its valence electron.

In NH4¹+, all four hydrogen atoms form single bonds with the central nitrogen atom. These bonds are represented by lines connecting each hydrogen atom to the nitrogen atom.

So, NH4¹+ has 4 bonds. Each bond represents a pair of electrons shared between the nitrogen atom and a hydrogen atom. The bonding arrangement ensures that the nitrogen atom has a complete octet (eight valence electrons) and each hydrogen atom has two electrons, following the stable configuration of helium.

The "+1" charge on NH4¹+ indicates that the ion has lost one electron, resulting in a positive charge. However, the number of bonds remains the same regardless of the charge.

Therefore, the correct answer is 4 for the number of bonds in NH4¹+.

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Answer:

the answer is C.

Explanation:

Bonds form when atoms share or transfer valence electrons. Valence electrons are the electrons in the outer energy level of an atom that may be involved in chemical interactions. Valence electrons are the basis of all chemical bonds.

Considering the phase diagram, the state of matter that exists in area B is gas.

The correct option is A.

A phase diagram is a graphical representation that shows the conditions of temperature and pressure at which different phases or states of a substance exist.

The axes of a phase diagram typically represent temperature (usually on the horizontal axis) and pressure (usually on the vertical axis). The diagram is divided into regions that correspond to different phases, and the lines separating these regions represent phase boundaries.

The point where three phase boundaries meet is known as the triple point, which represents the temperature and pressure at which all three phases can coexist in equilibrium.

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Answer:

will be 9.7 Liters

Explanation:

Answer: The answer is incus

Answer::

Explanation::

Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the  pH of a 0.01 M acetic acid.

Any hydrogen that comprises a material capable of giving a proton (a hydrogen ion) to another chemical is defined as acid. A base is indeed a molecule or ion that can receive a hydronium ion from just an acid.

1)Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. The pH value of stronger acid is lower.

2)CH\(_3\)COOH + H\(_2\)O  ⇄ CH\(_3\)COO⁻+  H\(_3\)O⁺

 0.01             0               0

 -x              +x                +x

 0.01-x           +x        +x

Ka=[ CH\(_3\)COO⁻][H\(_3\)O⁺]/[CH\(_3\)COOH]

1.8×10⁻⁵ = [x][x ]/[  0.01-x ]

x=1.34×10⁻³

pH = -log[H⁺]

     =  -log[1.34×10⁻³]

     =2.88

Therefore, because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the   pH of a 0.01 M acetic acid.

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The mass of chlorine gas product formed is 61.4 g.

What is the mass ?

First, we need to determine which reactant is limiting and which is in excess. To do this, we can use the given mass of HCl and convert it to moles:

63.2 g HCl × (1 mol HCl/36.46 g HCl) = 1.73 mol HCl

Next, we can use stoichiometry to determine how many moles of \(Cl_{2}\) will be produced from 1.73 mol of HCl:

1.73 mol HCl × (2 mol \(Cl_{2}\)/4 mol HCl) = 0.865 mol \(Cl_{2}\)

Finally, we can convert the moles of \(Cl_{2}\) to grams using its molar mass:

0.865 mol \(Cl_{2}\) × (70.91 g \(Cl_{2}\)/1 mol \(Cl_{2}\)) = 61.4 g \(Cl_{2}\)

Therefore, the mass of chlorine gas product formed is 61.4 g.

What is stoichiometry ?

Stoichiometry is a branch of chemistry that deals with the calculation of the quantities of reactants and products involved in a chemical reaction. It involves using balanced chemical equations to calculate the amounts of reactants required to produce a certain amount of product, or the amount of product that can be obtained from a given amount of reactant. Stoichiometry is an important tool for predicting the outcomes of chemical reactions and for designing chemical processes in industry.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer: Sodium chloride

Explanation:

Ocean water contains a number of substances. When a substance which has ionic bonds is dissolved in water it takes the form of ions.

The most common ions in ocean water are sodium and chloride. These are the ions formed when common salt, sodium chloride (NaCl) is dissolved in water.

Sodium chloride accounts for about 3% of ocean water by mass.

Answer:

By far, the most abundant elements are hydrogen and water.

Explanation:

The analysis of the 77 sea water samples taken during the Challenger's 3-year voyage did much to lay the foundations for determining the chemical content of sea water. By far, the most abundant elements are hydrogen and water (combined to make water). Together, these elements make up 96% of sea water. Sodium chloride and magnesium make up just under 4% of sea water. Trace amounts of 97 other elements are found in the remaining 0.08%. Of the trace elements, calcium, potassium, sulfur, and bromine are the most abundant.

This is directly from the text.

Answer:

The real acidity of milk is due to lactic acid. This is never found in milk when it is first drawn from the udder. It is produced by the action of the lactic acid organisms on the milk sugar. The so-called apparent acidity of milk is what gives fresh milk its acid reaction.

The two factors for a successful reaction to occur are collisions between particles with the right orientation and sufficient energy (A and B).

The kinetic theory is a model explaining the movement (motion) of particles in a given substance.

In conclusion, the two factors for a successful reaction to occur are collisions between particles with the right orientation and sufficient energy (A and B).

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The correct answer is Option 2: The overall reaction is>

The reaction of hydrogen and iodine chloride produces hydrogen iodide as an intermediate. This means that the rate of the reaction is determined by the concentrations of all three species:

The rate law, which expresses the relationship between the rate of the reaction and the concentration of the reactants, is rate = k [H2] [HI] [ICI], where k is the rate constant. This means that the rate of the reaction is proportional to the concentrations of H2, HI, and ICI.

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Answer:

option b

Explanation:

Answer:

one to two inches (three to five centimeters) per year.

Explanation:

Answer:

1 to 2 inches (3 to 5 centimeters) per year

Explanation:

It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.

Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).

The blood pH would turn more alkaline

There is more bicarbonate ions in the blood

The equilibrium would have to shift to the left

Hyperventilation is a condition in which a person breathes rapidly and deeply, leading to a decrease in the concentration of carbon dioxide (CO2) in the blood. This causes a shift in the balance of the carbonic acid-bicarbonate buffer system in the blood, which can affect the pH of the blood.

The carbonic acid-bicarbonate buffer system is an important mechanism that helps regulate the pH of the blood. It involves the equilibrium between carbonic acid (H2CO3) and bicarbonate ions (HCO3-) in the blood:

H2CO3 ⇌ H+ + HCO3-

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Answer:a

Explanation:

ddk

The amount of energy saved when one 60 W incandescent lightbulb is replaced with an equivalent 18 W compact fluorescent lightbulb over 10 hours would be 1512000 Joules.

Energy rate refers to the amount of energy generated or burned with time. In other words, energy rate is a function of energy and time. For example, if a system generates 10 W of energy, the energy rate is 10 joules per second.

In this case, the incandescent lightbulb is rated 60 W, which means 60 Joules of energy is consumed per second. The compact fluorescent lightbulb which is rated 18 W consumes 18 joules of energy per second.

The total amount of energy consumed in 10 hours by the incandescent bulb can be calculated as:

60 x 3600 x 10 = 2160000 Joules

The total amount of energy consumed in 10 hours by the compact fluorescence lightbulb would be:

18 x 3600 x 10 = 648000 Joules

The total amount of energy saved can be calculated by finding the difference:

2160000 - 648000 = 1512000 Joules

In other words, the amount of energy conserved by using the compact fluorescence lightbulb is 1512000 Joules.

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Mercury is a heavy metal of considerable toxicity

Scientific literature reveals various plants and plant derived natural products, i.e., phytochemicals, which can alleviate experimentally induced mercury toxicity in animals.

Phytochemicals have great antioxidant potential and are of great interest due to their beneficial effects on health of human beings, and they give immense health benefits to the consumers.The effects of phytochemical-rich foods on bioaccessibility of mercury in fish tissue (the amount of mercury that is released from fish into gastrointestinal tract fluid following a simulated digestion) were investigated using an in vitro digestion.

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Answer: The answer is D.gram

Explanation:

Answer:

A

Explanation:

The sun is larger than the planets in our solar system and has far more mass and gravity than the planets.