The formula for glycine is NH2CHCOOH. What kind of molecule is glycine? How can you tell?

Answers

Answer 1

Answer: Glycine is an amino acid. It contains a carboxyl group (COOH) and an amine group (NH2), with a side R group (CH)

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Density is a measure of mass divided by volume weight divided by area volume divided by weight mass divided by area

The substance which is dissolved in a solution is called:solvent
colloids
solute
precipitant

Answers

Answer: The substance which is dissolved in a solution is called solute.

Explanation:

Solution is made up two parts:

1) Solute : The substance which is dissolves in a solvent to give a solution.

It is always present in less amount.

2) Solvent : The liquid substance in which solute is dissolved is known as solvent.

It is always present in large amount.

Solution = Solute + Solvent

For example : Salt as solute and water as solvent in salt solution.

The substance that is dissolved in water is called a solute.

Hope this helps~

What is the 54th element on the periodic table?

Answers

Xenon is the 54th element on the periodic table .

The answer to the question is Xenon

Chromium, calcium, and potassium are near each other on the periodic table and have some common characteristics but differ in chemical reactivity. Which lists these metals in order from most reactive to least reactive?calcium, chromium, potassium
chromium, calcium, potassium
potassium, calcium, chromium
potassium, chromium, calcium

Answers

Answer: The correct order is:

Potassium > calcium > chromium

Explanation:

Potassium belongs to the group of alkali metals with group number 1 in a periodic table. Potassium easily displaces hydrogen atom from the water molecule.

Where as calcium belongs to group (II) and easily displaces hydrogen atom from the water molecule.

In a reactivity series potassium is comes before the calcium metal which means that it is more reactive than calcium metal.

Potassium > calcium

Where as chromium metal is member of group 6 and chromium reacts with steam and acids to form hydroxides. But doesn't reacts with water(in liquid phase) which means it less reactive then potassium and calcium.

Potassium > calcium > chromium

potassium, calcium, chromium

Not all of the water falls as rain, snow,or sleet evaporates. What happens to the rest of the water?

Answers

Hi there! All of the water returns to the atmosphere, it's called evapotranspiration and condenses. And then the water falls back to the Earth's surface and starts the cycle all over again. If you don't know what I mean, it's the Water Cycle.

3 In the wave-mechanical model of the atom, an orbital is defined as(1) a region of the most probable proton location
(2) a region of the most probable electron location
(3) a circular path traveled by a proton around the nucleus
(4) a circular path traveled by an electron around the nucleus

Answers

(2) a region of the most probably electron location. The rest are all false. (1) and (3) are false obviously, because it denotes the location for the proton, which is in the nucleus, and protons don't travel around the nucleus, they are the nucleus, at least a part of it. (4) a circular path traveled by an electron around the nucleus is false because although there are s orbitals which have a spherical shape around the nucleus in its electron shell, it does not mean it travels circularly around the nucleus, nor does it mean it is the only type of orbital shape.

In wave mechanical model an orbital is defined as $\boxed{\left( {\text{2}} \right){\text{region of most probable electron location}}}{\text{.}}$

Further explanation:

Bohr's model could not account for duality of matter and also contradicted the Heisenberg uncertainty principle. To overcome these weaknesses, a wave mechanical model was developed. The basis of this model was the Schrodinger wave equation of hydrogen atom.

The salient features of the wave mechanical or quantum mechanical model are as follows:

A. The energy associated with electrons present in atoms can take only certain discrete values. This is known as the quantization of energy.

B. Such quantized energy levels are a consequence of wave characteristics of electrons and allowed values are dictated in accordance with the solutions obtained from the Schrödinger wave equation.

C. The exact position as well the velocity of an electron cannot be precisely determined as it obeys the Heisenberg’s uncertainty principle. This leads to an important concept that path of an electron can never be precisely defined. Therefore it is better to use the term probability of locating electron.

D. The region of space around the atom in which the probability of locating any electron is highest is known as the orbital. The physical significance of the orbital is that it can be described using the values of ${\psi }}$ . There are several possible values of ${\psi }}$ . as can be obtained from the solving of Schrodinger equation. So there are several numbers of orbitals associated with an electron.

E. The utility of ${\psi }}$ is that its square ${\left| {\mathbf{\psi }} \right|^{\mathbf{2}}}$ is directly proportional to the probability of locating an electron at a point within an atom. Hence the orbital is not a circular region of space but a region where the probability of locating an electron is highest.

Therefore, in the wave-mechanical model of the atom, a region of the most probable location is defined as orbital. Hence, the correct option is $\left( {\text{2}} \right)$ .

Learn more:

1. Calculation of volume of gas: brainly.com/question/3636135

2. Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Bohr theory and quantum chemistry

Keywords: Wave mechanical model, Bohr model, wave mechanical model, Heisenberg’s uncertainty principle, Physical significance, orbital, Schrödinger wave equation and probability

Substance A is mixed with water and donates 0.4% of its H+ ions. Which of the following BEST describes Substance A?A.
It is a strong base and a very poor conductor of electric current.

B.
It is a strong acid and a very good conductor of electric current.

C.
It is a weak base and a very good conductor of electric current.

D.
It is a weak acid and a poor conductor of electric current.

Answers

Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.

What are acids?

According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.

In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.

Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.

To know more about acids, visit the below link:

brainly.com/question/12916250

Answer:

Explanation:

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The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below.3H2 + N2 mc025-1.jpg 2NH3 The molar mass of NH3 is 17.03 g/mol. The molar mass of H2 is 2.0158 g/mol. In a particular reaction, 0.575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures? 0.1 0.102 0.10209 0.1021