4. At least one carbon-carbon bond in an alkyne is a triple covalent bond. Other bonds may be single or double carbon-carbon bonds and carbon-hydrogen bonds.

Answer:

esterification reaction ...........

Now

[tex]\\ \rm\Rrightarrow Q=mc\delta T[/tex]

[tex]\\ \rm\Rrightarrow Q=200(10)(0.21)[/tex]

[tex]\\ \rm\Rrightarrow Q=20(21)[/tex]

[tex]\\ \rm\Rrightarrow Q=420cal[/tex]

Answer:

AAAAA its A

Explanation:

The error in the student's reasoning happened as they get confused between the beta minus decay and beta plus decay.

A neutron is converted into a proton in beta minus, increasing the atomic number of the atom.

In the given question beta minus decay is not occur as atomic number of the daughter nuclei does not increases. Rather than this in the given decay atomic mass of the daughter nuclei is less than the parent nuclei means plus beta decay is happened there.

Hence the error is in predicting the correct particle with charge.

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Answer:

Explanation:

Use context clues to write your own definition for each meaning of the word matter.

Example sentence

What is this gooey matter on the table?

Matter:

__________

Example sentence

Please vote! Your opinions matter.

Matter:

__________

Network solids are chemical compounds that are bound together by a covalent bond. Thus, option D is accurate.

Covalent bonds are the type of chemical bonds that mutually shares electrons between the atoms of the molecules of the compound.

A covalent crystal of network solids is held together by the covalent bond that can be seen in the structures of diamonds, graphite, silicon dioxide, etc.

Therefore, the network solids are option D. held by the covalent bonds.

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Answer:

What are those for solution be specific

Answer:

because the ions arent firmly held in place!

Explanation:

In the model of the atom, a fuzzy cloud around a hydrogen nucleus is used to represent the general region where the atom's electron is most likely located.

An atomic model is a graphic representation and/or diagram used to identify the components of atoms.

An atomic model may have into account all its components (i.e., electrons, protons, and neutrons).

In conclusion, in the model of the atom, a fuzzy cloud around a hydrogen nucleus is used to represent the general region where the atom's electron is most likely located.

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From the Dalton's law of partial pressures, the pressure of the hydrogen gas is 91.83 kPa.

In a mixture of gases, the total pressure is the sum of the pressures of the individual gases in the mixture according to the Dalton's law of partial pressures.

In this case, the partial pressure of the hydrogen gas is Phydrogen, the partial pressure of water is Pwater and the total pressure is PT.

Hence;

Phydrogen = PT - Pwater

95 - 3.17 = 91.83 kPa

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Answer: New Hampshire

Explanation:

If it is the dark green then its New Hampshire :)

Answer:

New Hampshire ;)

Explanation:

New Hampshire is the dark green state on this map, and it is apart of the first 13 colony I hope that helped.

Answer:

see below

Explanation:

water  pH ~ 7     acids are less than 7                bases are > 7

Answer:

95F

Explanation:

First we convert these temperatures into °C:

77°F = 25°C

95°F = 35°C

280K = 6.85°C

300K = 26.85°C

When temperature increases, water molecules have a greater average kinetic energy ans are more likely to collide with each other.

Out of the 4 temperatures, only 95°F (35°C) is of a higher temperature than 30°C. Hence 95°F is the answer.

Answer:

I didn't draw this but I think they're asking you to draw this

Explanation:

Answer:

chemical reaction

Explanation:

Reduction is the transfer of electrons between species in a chemical reaction where there is a process of gaining electrons or a decrease in the oxidation state by an element. A reduction chemical reaction involves increasing electrons associated with a single atom or a group of atom

Answer:

Explanation:

Answer: 1.380 × 10^-8 M

The pH is the measure of alkalinity or acidity of a substance.

It is the negative logarithm of H+ ions concentration [H+].

pH = -log[H+]

pOH on the other hand is negative logarith of OH- concentration [OH-].

pOH = -log[OH-]

In this case;

pOH = 7.86

We can calculate the [OH-]

pOH = -log[OH-]

But, pOH = 7.86

pOH = -log[OH-]

-log[OH-] = 7.86

[OH-] = Antilog -7.86

      = 1.380 × 10^-8 M

Therefore, [OH-] is 1.380 × 10^-8 M

Answer:

The calculated volume of the gas (in mL) at 20.0c and 740.mmHg when volume of gas collected at temperature of  11.0° C and pressure of 710 mmHg measures 0.148L is 78. 1 mL

Explanation:

The combined gas law combines the three gas laws, Boyle's law, Charles's law and Gay- Lussac's law. It states that the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant.

P V ÷ T = K

P1 × V1 ÷ T1 = P2× V2 ÷ T2

Parameters :

P1 = Initial pressure = 710.0 mmHg

V1 = 0. 148 L , converting it to mL = 0.148L × 1000 = 148 mL

T1 = Initial temperature = 11° C

P2 = Final pressure = 740 mmHg

V2 = Final volume in mL

T2 = Final temperature = 20° C

Calculations:

V2 = P1 × V1 × T2 ÷ P2 × T1

V2 = 710 × 148 × 11 ÷ 740 × 20

V2 = 1155880 ÷ 14800

V2 = 78.1 mL

Therefore, the calculated volume is 78.1 mL

The element that can bond with titanium (Ti) to form a polar covalent bond is Nitrogen (N).

In this type of bond, the atoms of the element share only one electron. As an example, we can mention the chlorine gas Cl2, in which the two chlorine atoms share an electron to achieve chemical stability.

Hence, we can see that to bond with Titanium, there needs to be an element that would form a polar covalent bond and this is Nitrogen and this is because of their electronegativity difference.

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Explanation:

Evolution is a biological process. It is how living things change over time and how new species develop.

Answer: It’s B

Explanation:

One mole Hydrogen need 1/2mol O_2 .

Moles of Hydrogen

Moles of O_2

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

Let's get to the reaction first ~

[tex] \qquad \qquad \rm 2H_2 + O_2 \rightarrow 2H_2O[/tex]

Here, we can infer that if we need 1 mole oxygen gas to react with 2 moles Hydrogen gas.

So, the number of Oxygen gas molecules we need to react should be half the number of Hydrogen gas molecules.

Number of Hydrogen gas molecules is :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{30}{2} [/tex]

[tex]\qquad \sf  \dashrightarrow \: 15[/tex]

Number of Oxygen gas molecules needed is :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{15}{2} [/tex]

Number of Oxygen atoms needed :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{15}{2} \times 2[/tex]

[tex]\qquad \sf  \dashrightarrow \: {15} \: atoms[/tex]

One atom of Oxygen weight 16 u, so 15 atoms weight ~

[tex]\qquad \sf  \dashrightarrow \: {15} \times 16[/tex]

[tex]\qquad \sf  \dashrightarrow \: 240 \: u[/tex]

So, we need 240 u of Oxygen atoms to react completely with 30 u of Hydrogen atoms.

Answer:

C

Explanation:

Increasing temp causes increased molecule movment in sample 2

Answer:

B

Explanation:

Uranium is windly use to reactant.

Answer:

Point A

Explanation:

The Northern Hemisphere is furthest away from the sun in position A. Therefore the sunlight takes longer to reach the Earth which results in the Northern Hemisphere experiencing winter.

Point A represents the position where the northern hemisphere is experiencing winter.

This is because Earth's axis is tilted away from the sun at this point, causing the northern hemisphere to receive less direct sunlight and shorter days. As a result, the rays from the sun are spread over a larger area, making the sunlight less intense and leading to colder temperatures during this time of the year in the northern hemisphere.

In contrast, at Point C, the northern hemisphere experiences summer. This is when the Earth's axis is tilted towards the sun, causing the northern hemisphere to receive more direct sunlight and longer days, resulting in warmer temperatures.

Points B and D are the equinox positions when the sun shines evenly on Earth from pole to pole, and both hemispheres experience approximately equal day and night lengths. These are the times of the year when transitions between seasons occur.

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Answer:

A certain portion of the land will be set aside as wildlife habitat

Answer: The butterfly effect

Explanation:

Answer:

pH = 6.91

Explanation:

Recall that at 25 °C, we have the relationship:

[tex]\displaystyle \text{pH} + \text{pOH} = 14.00[/tex]

Therefore, the pH of a solution with a pOH of 7.09 is:

[tex]\displaystyle \begin{aligned} \text{pH} + (7.09) & = 14.00 \\ \\ \text{pH} & = 6.91 \end{aligned}[/tex]

HCl(acid)+C₄H₈ (butene)⇒ addition reaction

name of the product: 2-cloro butane

The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The term neutralization reaction refers to a reaction that occurs between an acid and a base that leas to the formation of salt and water only. The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The reason why zinc will react with lead nitrate and not calcium chloride is because lead is less than zinc in the electrochemical series hence it can be displaced from solution.

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A tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

The liquid and water vapor establish equilibrium in a tightly sealed container but not in the drinking glass because in the tightly sealed jar, the water can't go into the atmosphere but in the drinking glass the water will evaporate.

So we can conclude that a tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

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