Oxygen
Hydrogen
Nitrogen
Carbon
A.
B.
c.
D
Which model represents the chemical formula NO2, nitrogen dioxide?
A)
A
B)
B.
o
C С.
D D

Answer:

Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information. ... Organisms inherit genetic material from their parents in the form of homologous chromosomes, containing a unique combination of DNA sequences that code for genes.

Explanation:

Explanation:

Answer: They are made of nylon, steel or sometimes gut.

Explanation:

Answer:

add

Explanation:

Answer:

Explanation:

First of all, let's write the equation of the reaction.

CH₃COOH + NaOH  ⇒ CH₃COONa + H₂O

The formula to be used here is CaVa/CbVb = na/nb

where Ca is the concentration of the acid (?)

Cb is the concentration of the base (0.175M)

Va is the volume of the acid (25 mL)

Vb is the volume of the base (37.5 mL)

na is the number of moles of acid (1)

nb is the number of moles of base (1)

Ca × 25/0.175 × 37.5 = 1/1

Ca = 0.175 × 37.5 × 1 /25 ×1

Ca = 0.263 M

The concentration of the acid in the sample was 0.263 M

Answer:

  Graphite

Explanation:

The structure of diamond is similar to that shown, but has a middle layer that is offset from the others. The structure of Buckminsterfullerene is that of a soccer ball, 60 atoms arranged in a 32-faced figure.

The structure shown matches that of graphite.

Answer:

Explanation:

Solar energy

Your answer  is 100% Solar Energy,

Answer:

Sedimentary

Explanation:

The amount of CaCO₃ in the tablet : 0.5219 g

Reaction

1. CaCO₃(in antacid) + 2HCl⇒ CaCl₂+H₂CO₃

2. Titration ⇒ HCl+NaOH⇒NaCl+H₂O

For titration :

M₁V₁.n₁=M₂V₂n₂(n=acid/base valence⇒NaOH/HCl=1)

mol HCl=mol NaOH = excess HCl

[tex]\tt 27.2\times 0.09767=2.657~mlmol[/tex]

mol HCl

[tex]\tt 75\times 0.1746=13.095~mlmol[/tex]

Moles of HCl used (reacted with CaCO₃) :

initial HCl - excess HCl =

[tex]\tt 13.095-2.657=10.438~mlmol=0.010438~mol[/tex]

From reaction 1 :

mol HCl : mol CaCO₃ = 2 : 1

[tex]\tt mol~CaCO_3=\dfrac{1}{2}\times 0.010438=0.005219[/tex]

mass of CaCO₃ :

[tex]\tt 0.005219\times 100~g/mol=0.5219~g[/tex]

Explanation:

because of double bond within chemical foundation.

Answer:

Saturated fatty acids exhibit a linear structure while unsaturated fatty acids bend, or kink, due to double bonds within the chemical foundation.

Answer:

E and B

Explanation:

the warmer the weather the faster it will decompose, this why is why sometimes bodies last longer frozen, or in cool temperatures.

that statement takes a out.

An illness shouldn't effect a decomposing body

Weight also shouldn't effect a decomposing body

Being buried can make bodies decompose fast because of all the bugs and other animals that will get down there and decompose it faster

Answer: B,E

Answer:

Nitrogen

Explanation:

Answer:

im pretty sure color is the right one

Answer: Ability to Burn

Explanation: I TOOK THE TEST

Answer: yes

Explanation:

Answer: C

Explanation: Answered this same question on a test before

Answer:

all the living organisms in a specific location 2. ...

Identify some biotic factors in the diagram.

Identify some biotic factors in the diagram.

Identify some biotic factors in the diagram.

Identify what this diagram represents? ...

Give one effect that an increase in the minnow population would have on the ecosystem.

Answer:

never move

Explanation:

Just like an electric current, we can only see the effects of magnetism when an electron is subjected to two simultaneous constant magnetic fields.

An electron at rest that is subjected to a magnetic field will never move but only in an electric field. The electrons are subjected to an electric force collinear with the electric field but in the opposite direction (the charge is negative).The acceleration vector tends to be in the same direction as the force, opposite the electric field.

Answer:

(D) The minimal chance that the newly formed neutrons of a fission

Explanation:

I got it right on A P E X

Answer:

D. the minimal chance that the newly formed neutrons of a fission

reaction are absorbed by more atoms.

Explanation:

took test

Answer:

23.85

Explanation:

is over of percent over 100

[tex]\frac{x}{159}[/tex]x[tex]\frac{15}{100}[/tex]

15 x 159 = 2385

2385 ÷ 100 = 23.85

If an athlete weighs 159 lb and has 15.0% % body fat by weight, the athlete's body contains approximately 23.84 pounds of fat.

To calculate the number of pounds of fat in the athlete's body, we can use the following steps:

Convert the athlete's weight from pounds to kilograms:

159 lb × 0.4536 kg/lb = 72.1224 kg

Calculate the weight of the athlete's body fat:

72.1224 kg × 0.150 = 10.81836 kg

Convert the weight of body fat from kilograms to pounds:

10.81836 kg × 2.2046 lb/kg = 23.8447 lb

Therefore, the athlete's body contains approximately 23.84 pounds of fat.

Learn more about fats here:

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#SPJ 2

Answer:

I believe it is a chemical change.

the gravity of the sun keeps them in their orbits just as the moon orbits the earth because of the pull of Earth's gravity the earth orbits the sun because of the pull of the sun's gravity

Answer: chemical weathering

Explanation: Chemical weathering is different from mechanical weathering because the rock changes, not just in size of pieces, but in composition. That is, one type of mineral changes into a different mineral. Chemical weathering works through chemical reactions that cause changes in the minerals.

Answer:

I am not very sure but I think it's chemical weathering

Answer:

what are the choices?

Explanation:

Answer:

The right answer is Option d (0.00103 M).

Explanation:

The given values are:

T = 31.6

e = 487 L mol cm

length, l = 1 cm

As we know,

Absorbance,

[tex]A=2-log_{10}(percent \ T)[/tex]

[tex]A=2-log_{10}(31.6)[/tex]

[tex]A=0.5003[/tex]

By using the Beer's law, we get

⇒ [tex]A=ecl[/tex]

⇒ [tex]c=\frac{A}{el}[/tex]

On substituting the values, we get

⇒    [tex]=\frac{0.5003}{487\times 1}[/tex]

⇒    [tex]=0.001027 \ \frac{mol}{L}[/tex]

⇒    [tex]=0.00103 \ M[/tex]

Answer:

D

Explanation:

The potential energy curve of a system of atoms define the potential energy of the atoms with respect to the inter-nuclear separation. The minimum point of the curve represents the equilibrium bond length of the bond.

The energy of the system depends on the distance between the two interacting atoms.

Looking at the potential energy curve for hydrogen molecule in option D, we can assert that a chemical bond indeed exists between the two atoms of hydrogen and the minimum point of the curve is the equilibrium bond length of the bond.

A common relation between potential energy and internuclear distance when stated, is applicable to the ground states of diatomic and polyatomic molecules.

The potential energy of two separate hydrogen atoms often becomes lower as they approach each other, and the single electrons on each atom are shared to form a covalent bond.

The bond length is regarded as the internuclear distance where the lowest potential energy is gotten. The strong attraction of each shared electron often stabilizes the system.

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Answer:

it affects by how many fishes it kills i think

Explanation:

Answer:

Explanation:

2NaOH + H₂SO₄ = Na₂SO₄ + 2H₂O .

2 ) 15.8 mL of .35 M sulphuric acid will contain .35 x .0158 moles of sulphuric acid

= .00553 moles

1 mole of H₂SO₄ reacts with 2 moles of NaOH

.00553 moles of  H₂SO₄ will react with 2  x .00553 moles of NaOH

= .01106 moles

.01106 moles were contained in 25 mL

so concentration of NaOH = .01106 / .025

= .4424 M .

4 )

3NaOH + H₃PO₄ = Na₃PO₄+ 3H₂O .

14 mL of 1.25 M NaOH will contain .014 x 1.25 moles = .0175 moles

25 mL of 1.1 M phosphoric acid = .025 x 1.1 moles = .0275 moles

.0275 moles  of phosphoric acid will require triple moles of NaOH , but it is in short supply . So NaOH is limiting reactant .

water formed = .0175 moles .

= .0175 x 18 grams of water

= .315 grams .