If the recommended daily allowance (RDA) for vitamin C is 60 mg per day and there are 70 mg of vitamin C per 100 g of orange, how many 3 oz. oranges would you have to eat each week to meet this requirement?

Please help, I'm terrible with Dimensional Analysis!!

Density of the unknown metal is 4.82 g/mL

Given,

mass of block is 83 g

When the block was placed in a graduated cylinder containing water, the volume of the block was 17.2 mL.

we have to find density with the help of these two terms,

As we know,

Density = Mass/volume

therefore,

Density = 83 / 17.2

= 4.82 g/mL

thus, density of unknown metal block is 4.82g/mL

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When NAD becomes NADH, it is being reduced and gaining chemical energy.

Nicotinamide adenine dinucleotide (NAD), a coenzyme, can exist in two forms, NAD⁺ (oxidized) and NADH (reduced form).

Electrons and protons released in catabolism reactions are attached to NAD⁺. The conversion of NAD⁺ to NADH is important reaction for production of ATP during the cellular respiration.

Reduction is lowering oxidation number because element, ion or compound gain electrons.

Chemical equation for reaction of reduction of NAD⁺ (see picture below):

NAD⁺ + 2e⁻ + H⁺ → NADH

Nicotinamide adenine dinucleotide (NAD) is made of two nucleosides joined by pyrophosphate.

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The molality of this solution is 0.165 m.

m(glucose) = 4.92 grams; mass of glucose

V(water) = 165.0 mL; volume of water

d(water) = 1.00 g/mL; the density of water

M(glucose) = 180 g/mol; molar mass of glucose

n(glucose) = m(glucose) / M(glucose)

moles of glucose = mass of glucose / Molar mass of glucose

n(glucose) = 4.92 g / 180 g/mol

n(glucose) = 0.027 mol

m(water) = 1.00 g/mL x 165 mL

m(water) = 165 g = 0.165 kg

molality = number of moles / mass of water

b(solution) = 0.027 mol / 0.165 kg

b(solution) = 0.165 mol/kg; molality of the solution

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The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is C₆H₇O₃.

The empirical formula gives the proportions of the elements present in a compound.

In this compound proportion od carbon, hydrogen and oxygen atoms is:

n(C) : n(H) : n(O) = 12 : 14 : 6 /÷2; in this example, molecular formula is divided by two

n(C) : n(H) : n(O) = 6 : 7 : 3

In the empirical formula, the proportion od carbon, hydrogen and oxygen atoms is 6 : 7 : 3, so the empirical formula is C₆H₇O₃.

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Answer:

matter is substance that has mass.

Answer: Mass and Volume?

Explanation:

The type of subatomic particles that can be located within the nucleus of an atom is protons and neutrons. The correct option is C.

Subatomic particles are those particles that are present inside the atoms. These are present in different locations inside the atom. They are charged particles.

An electron is a negatively charged particle that rotates around the nucleus and a neutron is neutral, and a proton is a positively charged particle. Proton and neutrons are present inside the nucleus.

Thus, the correct option is C. protons and neutrons.

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One of the hydrogens in the NH3 is replaced in the first reaction by the methyl group, or -CH3. The NH3 can have more than one H substituted for it, therefore the final product frequently comprises a blend of methylamine, dimethylamine, and trimethylamine.

A halogenoalkane and ethanolic ammonia can be used in a nucleophilic substitution process to produce primary aliphatic amines like methylamine (CH3NH2).

NH3 + CH3Cl = HCl + CH3NH2

The process is challenging because any unreacted ammonia can react with the generated HCl:

NH3+HCl yields NH4Cl.

Since the N in CH3NH2 still has a single pair of electrons, it can act as a base and interact with the HCl that is created in one of the following ways:

CH3NH2+HCl becomes CH3NH3+Cl.

or as a nucleophile and react with any chloromethane that hasn't been reacted:

(CH3)2NH + HCl = CH3NH2 + CH3Cl

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Yes, it can be used for either an ion or a part of a molecule.

Ions are any atom or molecule having a net electrical charge. A proton's charge, which is generally believed to be positive, is equal to and opposite to the charge of an electron, which is supposed to be negative. It has the ability to either gain or lose one electron, allowing it to change into an ion. It can join a molecule because it can form covalent bonds with other atoms to finish a full valence shell.

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A hydrogen atom can become either an ion or a part of a molecule. It can become an ion because it can lose or gain an electron. It can become an element of a molecule because it can form covalent bonds with other atoms to gain a full valence shell.

Ions are any atom or molecule having a net electrical charge. A proton's charge, which is usually believed to be positive, is adequate to and opposite to the charge of an electron, which is meant to be negative.

It has the ability to either gain or lose one electron, allowing it to vary into an ion. It can join a molecule because it can form covalent bonds with other atoms to end a full valence shell.

Why do two hydrogen atoms combine to make a molecule?

Hydrogen has number 1. So it's one electron and 1 proton. So to finish it's octet it need one more electron. So, to become stable it forms hydrogen molecule by sharing it's electron with another H atom and thus forms a chemical bond .

Is hydrogen an ion or neutral atom?

Hydrogen is that the smallest chemical element. it's one proton and one electron, making it neutral. However, the ions of atom are charged species.

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When two protons are extremely close to each other, there is a strong nuclear force between them.

The force between a proton and neutron is same as the force between two proton, which the nuclear force. Nuclear forces can also be called as the nuclear interactions. Nuclear forces affects the neutrons and protons, both nucleons in identical or similar way.

Strong nuclear force is one of the fundamental forces of the nature and it is strongest among the four. Four fundamental forces are -Gravitation, strong nuclear force, weak nuclear force, and electromagnetism.

The energy that is used in nuclear power and nuclear weapons, the nuclear force has an important role in storing it. To bring the charged protons together against their electric repulsion, energy is required. When the protons and neutrons are bound together by the nuclear force they form a nucleus, this energy is in stored form.

So, the strong forces holding two protons extremely close is strong nuclear forces.

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The molecular formula of a molecule that has an empirical formula of ch and its molar mass is known to be 26 g/mol is C₂H₂

The molecular formula of a compound is the total number of atoms present in a molecule of the compound.

The empirical formula of the molecule is the simplest whole number of atoms of a compound.

The empirical formula of the molecule is ch

The molar mass is 26 g/mol

So, the molecular formula will be C₂H₂ and the compound is acetylene. It is a hydrocarbon.

Thus, the molecular formula of the molecule is C₂H₂.

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In this compound, the proportion of carbon atoms to oxygen atoms is 12: 11.

What distinguishes an atom of carbon as such?

The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons. According to quantum physics, the first two electrons must occupy the innermost atomic orbital, while the wavefunctions of the following four electrons only partially fill the second standard and three second principal orbitals.

How are atoms located in a compound?

Calculate the element's molar mass using the periodic table. To determine the atoms, the number of moles, divide the given mass in grams by the molar mass. To get the number of atoms, multiply the number of moles by Avogadro's number.

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There are three non-equivalent sets of hydrogens are there in each of the following compounds.

Hydrogen is the simplest element. Each hydrogen atom has only one proton. Hydrogen is also the most abundant element in the universe. Stars like the Sun are mostly made of hydrogen. The sun is essentially a giant ball of hydrogen and helium gas. Hydrogen water is pure water with extra hydrogen molecules added. Hydrogen (H2) is the most abundant molecule known to man. It is a colorless, odorless, and tasteless gas. In any case, in 2007 a Japanese group discovered that inhaled hydrogen gas could act as a cancer preventive (antioxidant) agent.

Found in the Sun and most stars, Jupiter is composed primarily of hydrogen. Hydrogen is the most abundant form of water on earth. As a gas in the atmosphere, it is present in trace amounts, less than 1 ppm by volume.

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Answer:

It is an alkene

Explanation:

First, this is a hydrocarbon because it has only carbons and hydrogens.  Second, we see the C=C which is a double bond.  Double bonds between carbons make it an alkene.

It is important to make sure the information is accurate whether writing a research paper, practising a speech, or working on any other project that depends on data from outside sources.

Let us write a short evaluation on OZONE HOLE.

A large portion of the Sun's bright radiation is absorbed by the ozone layer, a shield region of the stratosphere. It has a large concentration of ozone.

It contains oxygen atoms that shield the surroundings from harmful radiation, such as brilliant beams, that are emitted by the sun and are available in space.

The ozone opening is less of a gap in the windshield and more of a dip. There is neither a uniform thinning of the ozone layer nor does the ozone disappear through it. The French physicists Charles Fabry and Henri Buisson also discovered it in 1913.

A size of 7.6 million square miles (19.7 square kilometres) was reached by the ozone opening in 2017 before it started to close. The distance increased to 8 million square miles in 2016.

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Volume of Iron is therefore 7.8g/cm^3

The formula for [tex]density(\rho) = \frac{Mass(m)}{Volume(v)}[/tex]

m = 7.3g

v = 24.83ml - 23.90ml = 0.93ml

Since 1ml = 1cm^3, the new volume = 0.93/cm^3

Using the formula [tex]\\ density(\rho) = \frac{7.3g}{0.93cm^{3} } = 7.8g/cm^{3}[/tex]

Volume is a measure of occupied third-dimensional space. It is frequently quantified numerically the use of SI derived gadgets (such as the cubic meter and liter) or through a number imperial units (such as the gallon, quart, cubic inch). The definition of size (cubed) is interrelated with volume. The volume of a container is typically understood to be the capability of the container; i.e., the amount of fluid (gas or liquid) that the container may want to hold, as a substitute than the quantity of space the container itself displaces.

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An Erlenmeyer flask is also termed as conical flask and titration flask. Invented in the year 1860. It is made up of glass and plastic. Inventer - Emil Erlenmeyer

Weight of empty erlenmeyel flask = 79.83 g

Weight after addition of water = 89.82 g

Weight of water = 89.82 - 79.83 = 9.99 g

Density of water at 22 deg celcius = 0.99777

Density = mass / volume

Volume = mass / density

= 9.99 g / 0.99777 g/ ml

= 10.01 ml

Calculated volume of water that the student measured is 10.01 ml.

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The diameter of a hydrogen atom is 1.04 × 10⁻⁷ meters.

Diameter or the atomic radius of an atom is a measure of the size of that atom. It is distance from the center of the nucleus to the outermost isolated electron of an atom.

d(H) = 1.04 × 10⁻¹⁰ m; a diameter of hydrogen atom

If a protein molecule has an overall length of 1000 times(1×10³) the diameter of a hydrogen atom, than:

d(protein) = 1.04 × 10⁻¹⁰ m × 1×10³

d(protein) = 1.04 × 10⁻⁷ m; diameter of a protein molecule

Protein is composed of amino acid linked with peptide bond.

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When substance a reacts with substance b, a new substance c is formed. based on this information, we can say that the given chemical reaction is spontaneous.

When two or more reactants combine together to form a final product without the loss of any atoms present in the reactants the reaction is known as addition reaction.

If a and b are elements, then they react with each other and form the compound c. Thus this will be the example of combination reaction in which one or more elements combine to form a compound. As no external energy is provided i.e., heat energy or catalyst , so we can also say that the given reaction is spontaneous.

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A chlorine atom that has gained an electron and has an overall negative charge is an example of an anion. The correct option is a.

Anions are the negatively charged particles of the atom. There are two types of ions, anions, and cations. Cations are positively charged ions.

A chlorine atom has gained an electron, when atoms gain an electron, it attains negative charges. So, when a negative charge is attained, it converts into an anion. The element will be called an anion. When it donates electrons, it attains a positive charge.

Thus, the correct option is a, anion.

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The question is incomplete. Your most probably complete question is given below:

anion

cation

proton

ions.

The key difference between free radical and ion is that the free radicals have one or more unpaired electron, but ions have paired electrons.

What is the Paired and Unpaired Electrons?

Unpaired electrons are the ones that appear in an orbital alone, while paired electrons are the ones that appear in an orbital as pairs in an atom. So, in the orbital, paired electrons always appear as two electrons, whereas unpaired electrons always appear as a single electron. The main distinction between paired and unpaired electrons is this. Additionally, whereas unpaired electrons result in paramagnetism or ferromagnetism in atoms, paired electrons cause diamagnetism in atoms.

A change in the orbital motion of electrons caused by an applied magnetic field induces diamagnetism, a very weak form of magnetism. This magnetism is transient and only endures when an outside field is present.

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Answer:

[tex]0.12g/cm^3[/tex]

Explanation:

Firstly, you should use this formula :

[tex]Density=\frac{mass}{volume}[/tex]

We know the mass is 16.14g, and volume as [tex]138.4ml[/tex].

Also remember to convert [tex]ml[/tex] to [tex]cm^3[/tex], where [tex]1ml = 1cm^3[/tex]

Therefore, [tex]138.4ml=138.4cm^3[/tex].

Substitute the value :

[tex]\frac{16.14g}{138.4cm^3}=0.1166g/cm^3[/tex]

Rounding it to 2 significant figure :

[tex]0.12g/cm^3[/tex]

The experiment described in the question given above supports the law of conservation of mass.

In chemistry, decomposition may be defined as a type of chemical reaction through which one reactant molecule significantly breaks down into two or more product molecules.

The same concept is applied in the question as well where the heating of mercuric oxide produces mercury and oxygen. According to the question, the mass of the reactant is equal to 2.16g, while the mass of the product is equal to 2.00 g plus 0.16 g which is togetherly 2.16 g.

Therefore, the experiment described in the question given above supports the law of conservation of mass.

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Hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water. It is false.

When hydrogen sulfide gas reacts with dioxygen gas, it produces water and solid Sulphur and not gaseous sulfur. The chemical equation of the given substances is :

                   2H2S +  O2 → 2S + 2H20

It is a redox reaction as both Oxidation and reduction happens in it. Oxidation of hydrogen sulphur to sulphur happens and reductions of oxygen to water takes place.  

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There are 180 grams of glucose in 1 liter of a 1 M solution.

Blood sugar, often known as glucose, is the main sugar found in your blood. It comes from the food you eat and is used as your body's main energy source. Your blood supplies glucose to all of the cells in your body, which then uses it as fuel.

Diabetes is a disorder when your blood sugar levels are too high.

moles = volume x molarity

moles = 1 L x 1 mol/L = 1 mol

mass = moles x molecular weight

mass = 1 mol x 180 g/mol = 180 g(we know that 180 daltons = 180 g/mol)

Therefore, 1 litre of a 1 M solution has 180 grammes of glucose.

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There are 180 grams of glucose in 1 liter of a 1 M solution.

Calculating:

moles = volume x molarity moles

= 1 L x 1 mol/L = 1 mole mass

= moles x molecular weight mass

= 1 mol x 180 g/mol = 180 g(we know that 180 daltons = 180 g/mol)

Therefore, 1 litre of a 1 M solution has 180 grams of glucose

What can we know about glucose?

Blood sugar, often referred to as glucose, is that the main sugar found in your blood. It comes from the food you eat and is employed as your body's main energy source. Your blood supplies glucose to all or any of the cells in your body, which then uses it as fuel.

Diabetes may be a disorder when your blood sugar levels are too high..

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The scientific questions Claudia can ask about the flame test are (A), (C), and, (D).

The flame test is used to find sure factors, which on heating deliver a particular colour to the flame.

clinical questions are extraordinary from regular questions as they've a prior goal and need to be testable.

a very good scientific question is absolutely reality-primarily based and may be answered through experiment or using previous evidence.

three principal kinds of clinical questions are Verification questions, size, or statement-based totally facts series, which include specific capabilities of an organism or phenomenon.

The clinical questions Claudia ask is-

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The  coordinates of B'  is (2,1)​ if the triangle below is reflected across the y-axis .

Hence , option D is correct one .

A reflection is a transformation of the graph of a function over x - axis or the y - axis ( or both ) . The x-coordinate of each point must be negated while reflecting across the Y-  axis, but the  value must remain unchanged .

Each point in a figure is transformed into a reflection by reflecting it over a line. This reflection translates the ABC triangle (A, B, and C) . The outcome is a brand-new figure known as the picture .

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The pancreas releases NaHCO₃ to buffer the pH of the stomach juices.

Balanced chemical equation for reaction of sodium hydrogen carbonate (NaHCO₃) and hydrochloric acid (main acid in stomach juices):

NaHCO₃ + HCl → NaCl + CO₂ + HCl.

Hydrogen carbonate mixed is used to neutralizes stomach acidity, it converts stomach acid (hydrochloric acid) to carbon dioxide.

Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.

Other molecules cannot buffer the pH because there are bases or very strong acids.

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To make sure the data they collect are accurate

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Answer:this case, the mass is 2.0g, the specific heat capacity of water is 4.18J/g/K, and the change in temperature is 5.0°C=5K , therefore the energy needed to raise it is: 5×2×4.18=41.8J

Explanation: