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Answer:

Explanation:

magnesium chloride

Answer:

I guess 1-mole carbon dioxide contains 6.02 x 10^23 molecules.

Answer:

Promethium atoms have 61 electrons and the electronic shell structure is [2, 8, 18, 23, 8, 2] with Atomic Term Symbol (Quantum Numbers) 6H5/2.

Answer:

13) Carbon Dioxide and water

Explanation:

The fact is that during photosynthesis, Carbon Dioxide is needed by green plants to manufacture their food and water is also needed but also chloroplast which contained chlorophyll is also needed

hence, the options are somehow confusing

14) perhaps it should be all of the above

Helium

Helium has 2 electrons both in the first shell (so two valence electrons).

Hope this helps :)

Answer:

longer, shorter

Explanation:

A carbon-carbon double bond is longer than a carbon-carbon triple bond, and shorter than a carbon-carbon single bond

Answer:

Writing of the subshells

Explanation:

Given configuration:-

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^63d^{10}4s^2[/tex]

Actual configuration:-

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^{10}[/tex]

This is because 4s orbital is less in energy than that of 3d

The molarity of the acetic acid, HC₂H₃O₂ solution is 0.244 M

We'll begin by writing the balanced equation for the reaction

HC₂H₃O₂ + KOH —> KC₂H₃O₂ + H₂O

From the balanced equation above,

The mole ratio of the acid, HC₂H₃O₂ (nA) = 1

The mole ratio of the base, KOH (nB) = 1

From the question given above, the following data were obtained:

Volume of the acid, HC₂H₃O₂ (Va) = 25 mL

Volume of the base, KOH (Vb) = 29.7 mL

Molarity of the base, KOH (Mb) = 0.205 M

MaVa / MbVb = nA/nB

(Ma × 25) / (0.205 × 29.7) = 1

(Ma × 25) / 6.0885 = 1

Cross multiply

Ma × 25 = 6.0885

Divide both side by 25

Ma = 6.0885 / 25

Therefore, the molarity of the acetic acid, HC₂H₃O₂ solution is 0.244 M

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Answer:

salinity

Explanation: guess

Answer:

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. ... Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.

Explanation:

Answer:

The answer is 9

Explanation:

Because 5+4=9 lol

Answer:

0.50M (1 sig. fig.)

Explanation:

The problem objective is 'Molarity (M)', so set up given data to reduce to moles per liter. That is ...

Molarity = moles Mg/Liters of solution = (48.6g/24.31g·mole⁻¹)/(4Liters) = 0.499794323M (calc. ans.) ≅ 0.5M (1 sig. fig.)

The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.

A solution is prepared by dissolving biphenyl into naphthalene. We can calculate the freezing point depression (ΔT) for naphthalene using the following expression.

[tex]\Delta T = i \times Kf \times m = 1 \times 6.90 \°C/m \times 1.324m = 9.14 \°C[/tex]

where,

The normal freezing point of naphthalene is 80.26 °C. The freezing point of the solution is:

[tex]T = 80.26 \° C - 9.14 \° C = 71.12 \° C[/tex]

The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.

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Answer:

C5H10O5

Explanation:

Answer:

C + 2H2 ⇒ CH4

Explanation:

In order to balance a chemical equation you need to make sure that the number of atoms on both sides are equal

C + H2 = CH4

C = 1

H = 2

Products:

C = 1

H = 4

H2 = 2 × 2 = 4

C + 2H2 ⇒ CH4

Hope this helps.

Answer:

good afternoon

Explanation:

like that you dummy

Answer:

No Specific question

Explanation:

Answer:

A: heating solid

B: melting

C: heating liquid

D: boiling

E: heating gas

F: melting point

Explanation: got it right

Answer:

The radiation has enough energy to knock electrons off some atoms of a bombarded substance producing ions.

Explanation:

Answer:

Huh? I guess it's

Explanation:

Answer:

The medicinal effects attributed to fungi, based mainly on uncharacterized substances or extracts, include antiviral, immunomodulatory, antitumor, antioxidant, radical scavenging, anti-inflammatory, antihyperlipidemic or antihypercholesterolemic, hepatoprotective, and antidiabetic effects.

Answer:

The stronger the pull of gravity on an object ( the greater it's weight)

Answer:

Question 8, I think is C describe CR. Question 7 is Chemical reactions produce new substances

Explanation:

Answer:

Aa

Explanation:

all of the punnet squares would be Aa because there is AA to aa

Answer:

decreases

Explanation:

As you go down the same group on the periodic table, the electronegativity of an atom will decrease.

Answer:

precipitation goes to the left box

condensation goes to the bottom box

evaporation goes in the top right box

Explanation:

hope this is helpfull

can you relate to these pictures

Answer:

A gas is light, the molecules are moving very fast, and a gas can change forms due to temp of the area its in.

Answer:

Covalent bonds are much more common in organic chemistry than ionic bonds. A covalent bond consists of the simultaneous attraction of two nuclei for one or more pairs of electrons. The electrons located between the two nuclei are bonding electrons.

...

Answer:

C.  Period 6

Explanation: