PLS HELP!!! In the reaction of calcium and oxygen to
form calcium oxide, shown below, what
are the reactants? Select all that apply
2
Ca + O
2
->
2
CaO

Cooperative binding of oxygen occurs for hemoglobin.

Cooperative binding refers to the process whereby binding of one molecule of oxygen results in more binding of oxygen molecules due to increased affinity of oxygen by the ligand.

Cooperative binding of oxygen occurs in hemoglobin.

In conclusion, cooperative binding enables hemoglobin to carry oxygen efficiently.

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Answer:

They fall slower.

Explanation:

moon's gravitation force is effected by the mass of the moon

but because the moon has less mass,

objects fall slower because it has less gravitation force

________________________________________________

Hope this helped.

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

The reactant that is entirely used up in a reaction is called a limiting reagent.

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products.

A product is a substance that is present at the end of a chemical reaction.

Hence,

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

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Answer:

72264x10²³moles

Explanation:

By Avogadro constant one mole of a substance is equal to 6022x10²³. so 12 hydrogen atoms =

12×6022x10²³=72264x10²³ moles.

There is not enough information to determine anything about the relative abundances of the two isotopes.

Isotopes are atoms that have the same atomic number but different mass numbers. We know that all the isotopes of an element are not available to the same extent in nature.

Hence, from the average atomic mass of carbon, we can see that there is not enough information to determine anything about the relative abundances of the two isotopes.

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Answer: Carbon-12 is more abundant than carbon —13 because the average atomic mass is closer to the mass of carbon —12

Explanation: took the test and got it right

The volume of aluminum hydroxide required for neutralization is 24.30 mL.

Acid and base:

The compounds which gives H+ ions in the aqueous solution are called acids while those which gives OH- ions are called base.

Neutralization reaction:

It is a chemical reaction that involves a reaction between the equal molar amount of acid and base and form a solution that has pH = 7.

Calculations:

The reaction between aluminum hydroxide and nitric acid is expressed as:

Al(OH)2 + 2HNO3 ----> Al(NO3)2 + 2H2O

The number of moles of nitric acid is calculated as:

Moles of HNO3 = 0.175 M x (30.00/1000) L = 0.00525 mol

The number of moles of Al(OH)2 required for the neutralization is:

Moles of Al(OH)2 = 0.00525 mol/2 = 0.002625 mol

The volume of Al(OH)2 is calculated as:

Volume = 0.002625 mol/0.108 M = 0.0243 L = 24.30 mL

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Answer: It has more neutrons. Its mass number is larger than the atomic mass number for carbon.

Explanation:

We can see that all the isotopes of Carbon occupies the same slot in the periodic table and thus the same periodic number.

Atomic number of carbon = 6

Periodic Table gives us the information of Atomic number and mass number of atoms of an element.

Atomic number does not give any information about the number of neutrons of an atom. Atomic number of an element is the number of protons in the nucleus of each atom of that element.

Mass number is defined as the total number of protons and neutrons in an atom. Mass number of a typical carbon atom is equal to 12.

Isotopes are variants of a particular chemical element which differ in number of neutrons. Hence, the mass number of different isotopes of the same element varies and gives us information about the number of neutrons present in that atom at the same time.

The mass number of Carbon-14 is equal to 14.

Atomic number of C-14 = Protons in Carbon-14 = 6

Neutrons in Carbon-14 = Mass Number - Atomic Number

Neutrons in C-14 = 14-6

= 8

Concentrations of alpha-fetoprotein (AFP):

Increased concentrations of alpha-fetoprotein (AFP) in adults are most characteristically associated with Hepatocellular carcinoma.

Alpha Fetoprotein (AFP):

It is a protein produced in a developing baby's liver. When a newborn is born, their AFP levels are typically high, but by the time they turn one, they are quite low. AFP levels in healthy persons should be extremely low. For adults, a typical AFP level ranges from 10 ng/mL to 20 ng/mL.

In reaction to cancer in the body, normal or cancerous cells produce chemicals known as tumor markers. High levels of AFP can indicate noncancerous liver illnesses such as cirrhosis and hepatitis as well as cancers of the testicles, ovaries, or liver.

Thus, one of the risk factors for Hepatocellular carcinoma has been proven to be a persistent increase in AFP serum levels.

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The rate constant is mathematically given as

K2=2.67sec^{-1}

The rate constant for a particular reaction may be calculated with the use of the Arrhenius equation. This constant can be stated in terms of two distinct temperatures, T1 and T2, as follows:

[tex]ln(\frac{K2}{K1})= (\frac{Ea}{R})*(\frac{1}{T1}-\frac{1}{T2})[/tex]

Therefore

KT1= 0.0110^{-1}

T1= 21+273.15

T1= 294.15K

T2= 200  

T2=200+273.15

T2= 473.15K

Ea= 35.5 Kj/Mol

Hence, in  j/mol R Ea is

Ea=35.5*1000 j/mol R

[tex]ln(\frac{K2}{0.0110})= (\frac{35.5*1000}{8.314})*(\frac{1}{294.15}-\frac{1}{473.15}\\\\ln(\frac{K2}{0.0110})=5.492[/tex]

K2/0.0110 =e^(5.492)

K2/0.0110 =242.74

K2= 242.74*0.0110

K2=2.67sec^{-1}

In conclusion, rate constant

K2=2.67sec^{-1}

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Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.

Hence, option 3 is correct answer.

Metals are solid at room temperature. Metals are malleable. Metals loses electrons easily. Metal are less electronegative. Non metals are non malleable. Non metals cannot loses electron. Non metals are more electronegative.

The Zig-Zag line called the amphoteric line, the semimetal line, the metal non metal line, the stair case and the metalloid line on the periodic table separates the metals from the non metals.

Thus from the above conclusion we can say that Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.

Hence, option 3 is correct answer.

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Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: Element Z has the following properties:

a. silvery-white solid at room temperature

b. malleable

c. used as a catalyst

d. conducts electricity

Element Z can be classified as a _________ and will be found ________ the zigzag line of the periodic table.

(1) non-metal; along side of

(2) metal; along side of

(3) metal; to the left of

(4) metalloid, along side of

(5) non-metal; to the right of

Option 3 is correct

Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.

As the element Z conducts electricity, so it is a metal.

Metals can be hammered, crushed, or rolled into thin sheets without breaking due to a feature known as malleability.

As the given element Z is malleable, so it is a metal.

Most transition metals are also used as catalyst because they can activate other compounds by adsorbing them to their surface. As the element Z is used as catalyst, so it is metal.

Some other physical properties of metals are :

1) They are also good conductor of heat.

2) Highly ductile

3) They are lustrous

4) They are sonorous

Metals are present on the left side of the zig-zag line (the line that separates metals and non metals) whereas non-metals are present on the right side of this line.

As the Element Z is metal on the basis of the given properties left side of the zig-zag line, so it will be found to the left of the zigzag line of the periodic table.

Hence option (3) is correct

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The balanced equation for the neutralization reactions is as below.

In order for chemical equations to be balanced, the number of atoms of each element before and after the reaction must be equal.

Thus:

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Guanine pairs with cytosine using three noncovalent hydrogen bonds, while adenine pairs with thymidine using two noncovalent hydrogen bonds.

Cytosine and guanine are joined by three hydrogen bonds. The Watson and Crick bases differ from one another in strength as a result. Thymine and adenine bonded base pairs in DNA are weaker than guanine and cytosine bonded base pairs. Size and structure of the specific nucleotides cause Adenine and Thymine to always pair together while Cytosine and Guanine always pair together.

Adenine and thymine can make two hydrogen bonds, while cytosine and guanine can form three hydrogen bonds. Or, to put it more simply, A and G form bonds. Because each base can only link with one other base, the process is known as complementary base pairing.

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The chemical separation method for two of the above named mixtures or compound indicated above are explained below.

A chemical compound is a material generated by the chemical union of two or more elements in set quantities.

Benzophenone and tributylamine

The combination of benzophenone and tributylamine is in diethyl ether (given in question). Tributylamine is a base that may readily be changed to a water soluble salt by adding an aqueous acid.

Add dilute aqueous acid to the solution. The amine salt will be present in the aqueous layer, whereas benzophenone will be present in the ether layer. A separatory funnel will isolate levels.

Fluorenone, octanoic acid, and dicyclohexylamine

Fluorenone, Octanoic acid, and dicyclohexyl amine: The combination comprises both an acid (octanoic acid) and a base (dicyclohexyl amine) (dicyclohexyl amine).

Add the diluted aqueous base to the solution (like NaCO3). Divide the two layers.

The acid is present in the aqueous layer as a salt, while the fluorenone and amine are present in the ether layer.

Add weak aqueous acid to this combination of fluorenone and dicyclohexyl amine.

Divide the two layers. The amine is present in the aqueous layer, and fluorenone is present in the ether.

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55.2218 grams of magnesium chloride must be added to 725 mL of water to create a solution with an anion concentration equal to 0.800 M.

To calculate the number of moles from molarity as

[tex]\frac{\text{x moles}\ MgCl_2}{0.725\ \text{L solution}} = \frac{0.8\ \text{moles}\ MgCl_2}{1.0\ \text{L solution}}[/tex]

x moles MgCl₂ = [tex]\frac{0.8\ \text{moles}\ MgCl_2}{1.0\ \text{L solution}} \times 0.725\ \text{L solution}[/tex]

                         = 0.58 moles MgCl₂

Mass of one mole of substance is known as molar mass.

Molar mass of MgCl₂ = Atomic mass of Mg + 2 (Atomic mass of Cl)

                                   = 24.31 + 2 (35.5)

                                   = 95.21

Convert moles to grams

0.58 moles MgCl₂ × [tex]\frac{95.21\ g}{1\ \text{mole}\ MgCl_2}[/tex]

= 55.2218 grams

Thus from the above conclusion we can say that 55.2218 grams of magnesium chloride must be added to 725 mL of water to create a solution with an anion concentration equal to 0.800 M.

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The properties of water benefits our planet.

Yes, the properties of water benefits our planet because it can dissolve huge number of solutes due to its polarity while on the other hand, its normal viscosity allows water to flow easily around the globe.

No, in my opinion the planet may face no problems because of these unique properties because these properties are important for us.

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The final concentration is 0.332 M.

Here, dilution formula is used,

The concentration of a solution is lowered by the process of dilution. This is commonly accomplished by increasing the solvent content of the solution, which lowers the moles per liter.

                                                    M₁V₁ = M₂V₂

where,

M₁ = Initial concentration

V₁ = Initial volume

M₂ = Final concentration

V₂ = Final volume

Given,

M₁ = 0.600 M

V₁ = 15.00 mL

V₂ = 27.13

To calculate,

M₂ =?

Put the given values in the above formula,

M₁V₁ = M₂V₂

0.600 × 15.00 = M₂ × 27.13

9 = M₂ × 27.13

M₂ = 9/27.13

M₂ = 0.332 M

Therefore the final concentration is 0.332 M.

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Answer:

C.) n

Explanation:

-----> P = pressure (atm)

-----> V = volume (L)

-----> T = temperature (K)

-----> n = number of moles

According to the problem, it seems like pressure (P), volume (V), and temperature (T) are all changing. The problem never brings up whether the number of moles (n) has changed. Therefore, the number of moles (n) must have been held constant.

________________________________________________________

If you need to know what the temperature changes to....

When the number of moles is held constant, you can find the change in the other variables using the Combined Gas Law equation:

P₁V₁ / T₁ = P₂V₂ / T₂

In this formula, "P₁", "V₁", and "T₁" represent the initial pressure, volume, and temperature. "P₂", "V₂", and "T₂" represent the final pressure, volume, and temperature. You can find the final temperature by plugging in the given values and simplifying.

P₁ = 1.21 atm                      P₂ = 2.52 atm

V₁ = 3.75 L                        V₂ = 1.72 L

T₁ = 293 K                         T₂ = ? K

P₁V₁ / T₁ = P₂V₂ / T₂                                       <----- Equation

(1.21 atm)(3.75 L) / (293 K) = (2.52 atm)(1.72 L) / T₂         <----- Insert values

0.015486 =  (2.52 atm)(1.72 L) / T₂              <----- Simplify left side

0.015486 = 4.3344 / T₂                               <----- Multiply 2.52 and 1.72

0.015486 x T₂ = 4.3344                               <----- Multiply both sides by T₂

T₂ = 279.885                                                <----- Divide both sides by 0.015486

T₂ = 280 K                                                   <----- Answer in correct sig figs

The height of water column would be stable on Mars is 1.89 m

To answer the question, we need to know what the pressure on mars is

The pressure on mars P = ρgh where

Making h subject of the formula, we have

h = P/ρg

Since

Substituting the values of the variables into the equation, we have

h = P/ρg

h = 700 Pa/(1000 kg/m³ × 3.7 m/s²)

h = 700 Pa/370 kg/m²s²

h = 1.89 m

So, the height of water column would be stable on Mars is 1.89 m

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The main chemical compound in marijuana that has a harmful effect on cells lining the airways is tetrahydrocannabinol, or THC. This compound is similar to nicotine, which is the primary harmful chemical compound in cigarette smoke.

In addition to THC, marijuana smoke also contains more tar than cigarette smoke. Tar is made up of small particles that are easily inhaled and are known to be carcinogenic. The combination of the THC, nicotine, and tar in marijuana smoke is what makes it so damaging to cells lining the airways.

The daily smoking of one marijuana joint is equivalent to the amount of damage to cells lining the airways as around five cigarettes.

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7.8049856 g of aluminium phosphate is produced from 7.5 g of lithium phosphate in this balanced equation.

A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Given data:

[tex]2Li_3PO_4 + Al_2(SO_4)_3[/tex]→ [tex]3Li_2SO_4 + 2AlPO_4[/tex]

Moles of 7.5 g of lithium phosphate.

The molar mass of lithium phosphate is 115.79 g/mol.

Moles = [tex]\frac{mass}{molar \;mass}[/tex]

Moles =[tex]\frac{7.5 g}{115.79 g/mol}[/tex]

Moles = [tex]\frac{7.5 g}{115.79 g/mol}[/tex]

Moles = 0.06477243285

Now we will compare the moles of [tex]AlPO_4[/tex] with [tex]Li_3PO_4[/tex].

               [tex]Li_3PO_4[/tex]               :     [tex]AlPO_4[/tex]

                   2            :               2

                0.385       :              2÷2× 0.064 = 0.064 mol

Mass of [tex]AlPO_4[/tex] :

Mass of [tex]AlPO_4[/tex] = moles × molar mass

Mass of [tex]AlPO_4[/tex] =0.064  mol × 121.9529 g/mol

Mass of [tex]AlPO_4[/tex] =  7.8049856 g

Hence, 7.8049856 g of aluminium phosphate is produced from 7.5 g of lithium phosphate in this balanced equation.

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The relative molecular mass of an element is a proportion of the mass of the unified amu. The relative molecular mass of sodium hydroxide is 40.

The molecular mass of a substance is an addition of the individual masses of the element that makes the compound.  

Moles of NaOH = 8 mole

Molarity = 0.2 M

Moles of sodium hydroxide in 25 cm³: 25 × 0.2 = 0.005 moles

The mole ratio between the two moles:

0.2 ÷ 0.005 = 40

Therefore, 40 is the relative molecular mass of the acid.

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Molar mass

No of moles

Volume

Answer:

2

Explanation:

There are  3 carbons on the right side

there are only two on the left side....you need one more ...so add one more... change the '1' coefficient in front of C   to  '2'

Answer:

Aluminum plays a vital role in the construction of aircraft. Its high resistance to corrosion and good weight to strength to cost ratio makes it the perfect material for aircraft construction. But the one property that makes aluminum the ideal metal for aircraft construction is its resistance to UV damage.

Explanation:

it's quite long but hope it helps

The concentration ratio for an oligopoly is Over 60 percent.

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The oxidation state of cobalt (III) is: +3

Oxidation state can also be referred to as oxidation number.

Oxidation state can be defined as total number of electrons that an atom must either loose or gain for it to form a chemical bond with another atom.

In conclusion, The oxidation state of cobalt (III) is: +3

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The ratio between the energy and oxygen based on the equation is 683.5 KJ/mol

From the equation, we obtained the following:

Thus, the ratio of energy to oxygen is given as:

Energy / Oxygen = 1367 / 2

Energy / Oxygen = 683.5 KJ/mol

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The pressure she exerts on the carpet sample:-5.8279 MPa

P = F/A

Where,

F= Force

A = Area

Given that;

d= 0.987 cm =0.987  x 10^-2 m

m= 45.5 kg

Area = πr^2= (π(0.987  x 10^-2)^2/2)

       =7.6511 x 10^-5  square meter

Force= mg

        = 45.5 x 9.8

        =445.9 N

Pressure = force/ area

              =445.9/7.6511 x 10^-5

              =5.8279 MPa

The pressure she exerts on the carpet sample:-5.8279 MPa

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Answer:

graduated cylinder

Explanation:

that is the most accurate one of the 3. The lines on a beaker or flask are just indicative.

Answer:

the role of the microscope world in creating new material.

Explanation:

Trust me ;)