isotopess! help pleasee 20pts

Explanation:

Archaism

Things on Earth would be unexplainable

Answer:

Distillation is the process by which sugar can be separated from the sugar solution.

Explanation:

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation.

Answer:

Boil the water, this would cause the water to evaporate and will leave behind the sugar crystals, which is known as distillation.

Explanation:

Antoine Lavoisier is the answer

Answer:

Antoine Lavoisier is the father of chemistry

Explanation:

Antoine-Laurent de Lavoisier, also Antoine Lavoisier after the French Revolution, was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology.

Answer:

a change in the level of consumer income

Explanation:

Answer:

Red, Orange. Yellow, Green, Blue, Indigo, and Violet.

Explanation:

the answer is the colors of the rainbow

Answer:

111

Answer

63.55

Explanation:

63

C

u

 has

69.2

%

abundance.

65

C

u

has

30.8

%

abundance.

So, the weighted average is

62.93

×

69.2

%

+

64.93

×

30.8

%

Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.

Explanation:

An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.

The atom described is an anion with -1 charge as it has one extra electron than protons.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The coefficient of oxygen is five which is needed to balance the given chemical equation and equation is C₃H₈ +5 O₂[tex]\rightarrow[/tex] 3 CO₂ +4   H₂O.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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Answer: 116.12 g/mol

Explanation:

The molecular mass of a formula unit of dimethylglyoxime is calculated as 116 g/mol.

The molecular mass can be given as the sum of the mass of each element in the formula unit of the compound.

The dimethylglyoxime is the compound with molecular formula, [tex]\rm C_4H_8N_2O_2[/tex].

The mass of each element in the compound is:

Substituting the mass in the formula unit of the compound as:

[tex]\rm C_4H_8N_2O_2=4(carbon)+8(hydrogen)+2(nitrogen)+2(oxygen)\\ C_4H_8N_2O_2=4(12)+8(1)+2(14)+2(16)g\\ C_4H_8N_2O_2=116\;g[/tex]

The molecular mass of dimethylglyoxime is 116 g/mol.

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Properties of Rhenium-185 Isotope:

Properties of Rhenium-185 Isotope: RHENIUM-185

Neutron Number (N) 110

Atomic Number (Z) 75

Mass Number (A) 185

Nucleon Number (A) 185

25 more rows

Dietary protein will not be digested if Hcl were not being produced in sufficient quantities.

In the stomach, there are some glands found on the stomach lining that helps to release hydrochloric acid (HCl). Their major role is to dissolve food and produce an acidic medium.

The acidic media promotes and improves the conversion of pepsinogen to pepsin. Pepsin acts as an enzyme that supports protein digestion.

Protein digestion requires a pH of around 1.8 which can be achieved by the secretion of HCl.

As a result, if HCI is not released in the stomach in sufficient quantities, pepsin will not be activated and it would have a detrimental impact on protein digestion.

Therefore, we can conclude that dietary protein will not be digested if Hcl were not being produced in sufficient quantities.

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[tex] - 34 {}^{15} [/tex]

Answer:

New substances formed when breaking of bonds take place and new bonds get formed which results in formation of new products. That breaking of bond is a chemical change because in such a process composition of substance gets changed and forms a new substance.

Answer:

Therefore both Principal quantum number (n) and angular momentum quantum number (1) are responsible to energy level of an orbital in a multi electron atom.

Explanation:

Hope this helps.

When fossil fuels are burnt, CO2 is released into the air and is taken up by plants during photosynthesis to form glucose and subsequently starch.

Fossil fuels contain a large proportion of carbon atoms. When fossil fuels are burnt, these carbon atoms are released as carbon dioxide and escape to the atmosphere as atmospheric CO2 in air.

Recall that plants take up the CO2 in air during the process of photosynthesis. This CO2 becomes combined with water in the presence of sunlight to form glucose.

This glucose is converted to starch and stored in plant tissues. This is how the  carbon atom inside a fossil fuel  becomes a carbon atom inside a plant.

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Answer:

The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.

Explanation:

Hope this helps...

Warm

Explanation:

The warm air is going against the cold

Explanation:

beryllium must loss 2 electrons to form a stable octet to its nearest noble gas Helium.

It can loss electron because it is a metal and is placed in 2group and 2 period in group of alkaline earth metals.

hope this helps you to.

Answer:

When the temperature of a system goes up, the pressure also goes up, and vice versa. The relationship between pressure and temperature of a gas is stated by the Gay-Lussac's law.

Answer:

We find that temperature and pressure are linearly related, and if the temperature is on the kelvin scale, then P and T are directly proportional (again, when volume and moles of gas are held constant); if the temperature on the kelvin scale increases by a certain factor, the gas pressure increases by the same factor.

Answer:

2. A. solution

3. C The mass is different, but the melting behavior is the same

Calcium (Ca), strontium (Sr), and barium (Ba) are all located in the same column of the periodic table because they have similar atomic structure and similar chemical properties

From the question, we are to determine why calcium (Ca), strontium (Sr) and barium (Ba) are all located in the same column of the periodic table

The periodic table is a tabular arrangement of chemical elements that is arranged by increasing atomic number and groups elements according to recurring properties.

Elements with similar atomic structure and similar chemical properties appear in the vertical columns. These columns are called groups.

Hence, calcium (Ca), strontium (Sr), and barium (Ba) are all located in the same column of the periodic table because they have similar atomic structure and similar chemical properties

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The pH range of phenolphthalein is 8.3 - 10.0, which is suitable with the pH range of Strong Acid and Strong base titration and so phenolphthalein is used as a visual indicator in a strong acid-strong base titration.

Any substance that gives a clear visible indication of the presence or absence of a particular concentration of a chemical species, such as an acid or an alkali in a solution, usually by a colour change.

The pH range of Strong Acid and Strong base titration is 3–11 and equivalent point is at 7

the pH range of Strong Acid and Weak base  titration,  is 3–8 and equivalent point is below 7

the pH range of Weak Acid and Strong base  titration, is 6 - 11 and equivalent point is above 7

So for titration , an indicator with suitable pH range is used

The pH range of phenolphthalein is 8.3 - 10.0.

Therefore phenolphthalein is used as a visual indicator in a strong acid-strong base titration.

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