Why do a human and monkey look different? the location of the DNA in a cell the type of cells the organization of cell structures the DNA sequence

Answer:

Rubber is an insulator.

Remaining three are metals and hence conductors.

Answer:

Water is weird because in solid state The molecules are combine then in liquid state they are wide apart.

Molarity is the molar concentration of the solution with respect to the moles and the volume. The molarity of the magnesium ion will be 0.339 M, and the Bromium ion will be 0.678M.

Molarity is the proportion of the moles of the solute to the volume in liters of the solution present. The compound magnesium bromide completely dissociates as:

MgBr² ⇆  Mg⁺² + 2Br⁻

The molarity of the magnesium ion will be equal to the M of the magnesium bromide and hence, will be 0.339 M.

The molarity of the bromide ions will be equal to two times the M of the magnesium bromide species and hence is 0.678 M.

Therefore, the molarity of the magnesium ion will be 0.339 M, and the Bromium ion will be 0.678M.

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Answer: As the substance changes from a liquid to a gas, bonds within its molecules almost dissapear and the average distance between them.

Explanation:

Answer:

B. Single replacement.

Explanation:

The A in compound AB was replaced by C to make CB. Since there was only one instance of replacement, it is a single replacement reaction.

Answer:

1.The electonic configuration of elements and their position in the periodic table are related to each other, From the electronic configuration of the elements, we can determine the period and the group to which the element belongs

Let's consider, sodium with atomic number 11 and k, l, and M shells have 2,8,and 1 electrons. since, there are 3 principal energy levels so we concluded sodium belongs to third period M Shell(valance shell) has only 1 electrons. so sodium belongs to group 1.

2. Entire D-block elements are known as Transition Elements.

3. Group 17 is the halogen group.

4. Main group of elements are...... 1,2, and 13 through 18.

5. Group 18 are the noble gas elements .

12. a). Smaller

b). Increases

c). More reactive

d). Softer

7. a). k › Ca › Ge › Br › Kr

b). Ra › Ba › Sr › Ca › Mg › Be

9. a). Ca(calcium) ion is smaller.

b). Cl(chlorine) atom is smaller.

c). Mg(magnesium) atom is smaller.

10. a). F(fluorine)

b). Sr(strontium)

c). Pb(lead)

d). At(Astatine)

Explanation:

Word Equation

Barium Chloride + Sodium Chromate = Sodium Chloride + Barium Chromate

1 mole of aqueous Barium Chloride [BaCl2] reacts with 1 mole of aqueous Sodium Chromate [Na2CrO4] to form 2 moles of aqueous Sodium Chloride [NaCl] and 1 mole of solid Barium Chromate [BaCrO4]

Answer:

Structure 1:
The longest chain is made up of 4 carbons (butane). There is a 1-carbon branch (methyl). The lowest possible position of the branch is on the 2nd carbon. This makes the alkane: 2-methylbutane.

Structure 2:

The longest chain is made up of 7 carbons (heptane). There is a 2-carbon branch (ethyl). The lowest possible position of the branch is on the 4th carbon. This makes the alkane: 4-ethylheptane.

Structure 3:
The longest chain is made up of 4 carbons (butane). There are 2, 1-carbon branches (dimethyl). The lowest possible position of both branches is on the 2nd carbon. This makes the alkane: 2,2-dimethylbutane.

Structure 4:
The longest chain is made up of 3 carbons (propane). There are 2, 1-carbon branches (dimethyl). The lowest possible position of both branches is on the 2nd carbon. This makes the alkane: 2,2-dimethylpropane.

Structure 5:
The longest chain is made up of 6 carbons (hexane). There is a 1-carbon branch (methyl). The lowest possible position of the branch is on the 2nd carbon. This makes the alkane: 2-methylhexane.

Structure 6:
The longest chain is made up of 3 carbons (propane). There is a 1-carbon branch (methyl). The lowest possible position of the branch is on the 2nd carbon. This makes the alkane: 2-methylpropane.

The isomers are structures 1 and 4 because they contain the same amount of carbons (5) and hydrogens (12) while assuming different structures.

Answer:

20,000 centigrams

Explanation:

Answer:

3.711 L

Explanation:

The formula you need to use is the following:

[tex]\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\[/tex]

3.4L / 298 K = V2 / 273 K

V2 = 3.711 L

The hydrogen ion concentration is  [tex]\rm[H^{+} ] = 1.8 \times 10^{-10}[/tex] M .

The pH scale is used to rank solutions in terms of how acidic or how basic they are.

It indicates the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in a solution.

These ion concentrations are equal in pure water, which has a pH of 7.

The hydrogen ion and hydroxide ion are related as

[tex]\rm[H^{+} ] = \dfrac{1 \;\times 10^{-14} }{[OH^{-}] }[/tex]

[tex]\rm[H^{+} ] = \dfrac{1 \;\times 10^{-14} }{[5.42\times10^{-5} ] }[/tex]

[tex]\rm[H^{+} ] = 1.8 \times 10^{-10}[/tex] M

The hydrogen ion concentration is  [tex]\rm[H^{+} ] = 1.8 \times 10^{-10}[/tex] M .

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Answer:

Beta

Explanation:

Cause it emits in and become platinum so I believe  its beta

If Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

Radiation in the  chemistry is a branch of nuclear chemistry which deals with the study of the chemical effects of radiation of alpha beta and gamma rays  on matter or any radioactive atom of periodic table.

This is very different from radio-chemistry as no radioactivity or radioactive rays needs to be present in the material which is being chemically changed by the radiation by removing proton from the nucleus.

Therefore, Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

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Answer: 0.02595 is your answer I looked it up

Answer:

.03

Explanation:

The number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mole is 6.022 × 10²³

[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]

The given number of moles are 4.2 x 10⁻⁴¹

[tex]Moles = 4.2 \times 10^-^4^1 \times \dfrac{1}{6.023 \times 10^2^3} = 6.973 \times 10^{-65}[/tex]

Thus, the number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

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[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Arrow head shows the direction of products formed in a reaction. so we can say that it denotes the direction of the chemical reaction. I.e From Reactant to Product.

so, the correct choice is B

Answer:

Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.

Explanation:

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