Paul made a list about alkaline earth metals.
Alkaline Earth Metals
• gain two electrons
• are found in group two
• ions will be positive two
include elements Be, Mg, Ca
Paul made a mistake on his list. Which BEST describes the mistake Paul made?
A
Alkaline earth metals do not gain two electrons; they lose two electrons.
В
Alkaline earth metals are not found in group two, they are found in group one.
C
Alkaline earth metal ions will not be positive two; the ions will be negative two.
D
Alkaline earth metals do not include elements Be, Mg, and Ca; they include Co, Ni, and Cu.
2021 Illuminate Education Inc.

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.

Learn more: https://brainly.com/question/2292439

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:

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

Answer:

9.83039 moles i think this is the answer

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

Learn more: https://brainly.com/question/25768579

Helium

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

Hope this helps :)

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

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:

Explanation:

magnesium chloride

Answer:

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

Answer:

A little portion of a substance that has all of the substance's physical and chemical properties. If a molecule has more than one atom, the atoms might be identical (a molecule of oxygen contains two atoms of oxygen) or distinct (a molecule of water contains two atoms of hydrogen and one atom of oxygen).

Explanation:

Answer:

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

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:

C5H10O5

Explanation:

https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%20%5Cneq%20%5Cneq%20%20%5Clim_%7Bn%20%5Cto%20%5Cinfty%7D%20a_n%20%5Cint%5Climits%5Ea_b%20%7Bx%7D%20%5C%2C%20dx%20x%5E%7B2%7D%20%5C%5C%20%5C%5C%20%5Cleq%20%5C%5C%0

Answer:

6.022×1023

Explanation:

There are 6.022 × 1023 atoms of potassium in every mole of potassium. Since one mole of KOH contains one mole of K, the answer is 6.022×1023 atoms of K.

Answer:

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

Explanation:

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.)

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

Answer:

Aa

Explanation:

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

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:

salinity

Explanation: guess

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

Answer:

Explanation:

Procrastination is a plague to which we are all susceptible. Essentially, procrastination is the avoidance of work or necessary tasks by focusing on more satisfying activities. It’s easy to chalk procrastination up to a lack of self-motivation, lazy habits or incompetence. But in reality, procrastination is chemical; there’s a science to why we prefer relaxing activities to the required.

Procrastination boils down to a battle between the limbic system and the prefrontal cortex. The limbic system is a set of brain structures containing the pleasure center, while the prefrontal cortex controls planning and decision making. The prefrontal cortex is less developed and thus weaker, so often times the limbic system wins out, leading to procrastination.

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:

Huh? I guess it's

Explanation:

Answer:

Answer:

decreases

Explanation:

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

Answer:

The answer is 9

Explanation:

Because 5+4=9 lol

Answer:

Element Fluorine

Explanation:

The chemical element fluorine is a gas that has a mass number of 19.

The gas with a mass number of 19 is potassium-39 (K-39).

Potassium-39 is an isotope of potassium, which is an alkali metal element found in Group 1 of the periodic table. The atomic number of potassium is 19, indicating the number of protons in its nucleus, while the mass number represents the total number of protons and neutrons in the atom.

Potassium-39 is the most abundant naturally occurring isotope of potassium, accounting for about 93% of its isotopic composition. It is stable and non-radioactive. Potassium as a whole is an essential element for many biological processes and is found in various foods. It plays a crucial role in nerve function, muscle contraction, and maintaining electrolyte balance in the body.

Learn more about Potassium-39, here:

https://brainly.com/question/4991286

#SPJ6