When two atoms are bonded and have a large difference in electronegativity:
HELP PLEASEEE

Answer: False

Explanation:

An acid is defined as the substance which looses hydrogen ion or hydronium ions when dissolved in water.

A base is defined as the substance which looses hydroxide ions when dissolved in water.

If the solution has higher hydronium ion concentration as compared to the hydroxide ion concentration, then the pH will be low and the solution will be acidic.

If the solution has low hydronium ion concentration as compared to the hydroxide ion concentration then the pH will be high and the solution will be basic.

Answer: archaebacteria

Explanation: I took the same test

Answer:

Its A, C and D

Explanation:

A= correct because when you add heat to a solid it starts to melt and turn to liquid

B= Incorrect because the more heat that's dded the faster the atoms in the object will move and that creates energy

C= Correct because the liquid is in fact changing to a gas as more heat is added.

D= Correct because as i explained in B the more heat added the more energy is there

Answer:

The Heisenberg uncertainty principle states that the exact position and momentum of an electron cannot be simultaneously determined. Warner Heisenberg contributed to atomic theory through formulating quantum mechanics in terms of matrices and in discovering the uncertainty principle, which states that a particle's position and momentum cannot both be known exactly.

Explanation:

i hoped this help

Answer:

C

Explanation:

I believe there is more to the question . Bet the answer would be C

On completing and balancing the half-reaction of chromium (iii) forming from dichromate the number of electrons are either produced or consumed  are option (b): Three electrons are produced.

To determine the number of electrons produced or consumed in the half-reaction of chromium(III) forming from dichromate, let's first write the balanced half-reaction. The dichromate ion (Cr2O7^2-) is reduced to chromium(III) ion (Cr^3+) in this reaction. We can represent the reduction half-reaction as follows:

Cr2O7^2- ⟶ Cr^3+

To balance the half-reaction, we need to equalize the number of chromium atoms and oxygen atoms on both sides. Since there are two chromium atoms on the left side and only one on the right side, we add a coefficient of 2 in front of the chromium ion:

2Cr2O7^2- ⟶ 2Cr^3+

Now, let's examine the changes in oxidation state for chromium in this reaction. In dichromate (Cr2O7^2-), chromium has an oxidation state of +6, while in chromium(III) (Cr^3+), it has an oxidation state of +3. Therefore, the oxidation state of chromium decreases by 3 in this reduction half-reaction.

Reduction involves a gain of electrons. Since the oxidation state of chromium decreases by 3, it means that three electrons are gained by each chromium ion. Therefore, the correct answer is option (b): Three electrons are produced.

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Answer:

c. Six electrons are consumed

Explanation:

The first step is to ensure that the chromium atoms are balanced by adjusting the coefficients if needed. Do so by giving the Cr3+ ion a coefficient of 2.

Cr2O2−7 ⟶ 2Cr3+ (aq)

Next, balance the oxygen atoms by adding H2O molecules. The half-reaction has seven O atoms on the left and none on the right, so add 7H2O (l) to the right side.

Cr2O2−7 ⟶ 2Cr3+ (aq) + 7H2O (l)

Next, balance the hydrogen atoms by adding H+ ions. The half-reaction has 14 H atoms on the right side and none on the left, so add 14H+(aq) to the left side.

Cr2O2−7 + 14H+ (aq) ⟶ 2Cr3+ (aq) + 7H2O (l)

At this point, the charge can be balanced by adding electrons (e−). To do so, find the total charge on each side of the reaction. The left side has a total charge of (−2) + 14 × (+1) = 12+. The right side has a total charge of 2 × (+3) = 6+. Adding 6e− to the left side brings the charge down to 6+ to match the right side.

Cr2O2−7 + 14H+ (aq) +6e− ⟶ 2Cr3+ (aq) + 7H2O (l)

This gives us the answer to the question, which is that six electrons are consumed, since they are on the left side of the equation. Note that it does not make a difference whether the reaction is assumed to be in an acidic or a basic solution. The extra step taken for a basic solution is to add the same number of OH− ions to both sides of the reaction, which does not affect the number of electrons needed to balance the charges.

Answer:

Properties: The melting point of phosphorus (white) is 44.1°C, boiling point (white) is 280°C, specific gravity (white) is 1.82, (red) 2.20, (black) 2.25-2.69, with a valence of 3 or 5. There are four allotropic forms of phosphorus: two forms of white (or yellow), red, and black (or violet).Oct 7, 2019

Atomic Number: 15

Atomic Weight: 30.973762

Explanation:

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Answer:

Properties: The melting point of phosphorus

Atomic Number: 15

Atomic Weight: 30.973762

Discovery: Hennig Brand, 1669 (Germany)

Answer:

Ozone

Explanation:

The ozone layer protects the UV rays and also theres a hole in it near antarica which is causing global warming!

Off topic sorry lol:P

I hope this helps i got the answer correct

Remember to mark brainliest

Answer: chlorine

Explanation:

Chlorine is a chemical that is added to drinking water to kill parasites, bacteria, and viruses.

Chlorination is the addition of chlorine to drinking water to kill microbes such as parasites, bacteria, and viruses. To achieve safe levels of chlorine in drinking water, different processes can be used.

The small amounts of chlorine in drinking water do not cause harmful health effects and give protection against waterborne disease outbreaks. Chlorinated water can smell and taste differently than untreated water.

When the chlorine is dissolved in water, it converts to an equilibrium mixture of chlorine, hydrochloric acid (HCl), and hypochlorous acid (HOCl).

Taste and smell can cause problems depending upon the water quality and amount of chlorine in the water. Chlorine levels up to 4 mg/L or 4 parts per million (ppm)) are assumed safe in drinking water external icons.

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Answer:

This question is a practical question and hence incomplete

Explanation:

However, there are some steps that can be followed to achieve the aim of this question.

To convert millimeters (mm) to cubic centimeters (cm³), the value in millimeter will have to be divided by 1000. This is because 1 mm equals 0.001 cm³. Hence, if the volume in the data is 30 mm, the equivalent in cm³ will be

30/1000 = 0.03 cm³

OR

1 mm ⇒ 0.001 cm³

30 mm ⇒ ?

Let's assume the unknown (?) is X

1 × X = 30 × 0.001

X = 0.03 cm³

Hence, 30 mm equals 0.03 cm³

Also, to convert any volume from cubic centimeter (cm³) to square meter (m²), you will divide the unit in cm³ by 1 × 10⁶ (1,000,000). To convert the value obtained earlier (0.03 cm³ or 3 × 10⁻² cm³) to m², you will

1,000,000 cm³ ⇒ 1 m²

0.03 cm³ ⇒ ?

Let's assume the unknown (?) is Y

1000000 × Y = 0.03 × 1

Y = 0.03/1000000 OR you can write it as 3 × 10⁻² × 10⁻⁶

Y =  3 × 10⁻⁸m²

Hence, 0.03 mm equals 3 × 10⁻⁸ m²

The volume of fuel is 6 liters and the temperature is about 300 degrees. Gasoline laws relate to volume, strain, temperature, and amount of fuel. New fuel volume when the temperature drops to 200 ok: the old way to fine-tune gasoline. 273 ok (0°C) and pressure 1.00 atm.

Temperature is a measure of hot or cold expressed in many scales, including Fahrenheit and Celsius. Temperature indicates the route wherein heat energy will spontaneously waft—i.e., from a hotter body (one at a better temperature) to a colder frame (one at a decreased temperature). warmness is the overall energy of the motion of the molecules of a substance, while temperature refers back to the measure of the average energy of the motions of the molecules inside the substance.

Temperature is just a size that shows the average kinetic strength of one atom or molecule. hence, whilst we say something is hot or bloodless, we're normally using some other reference factor to outline the hotness and coldness of a frame. A thermometer is a tool that measures temperature. it can measure the temperature of a stable along with food, a liquid inclusive of water, or fuel along with air.

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Answer:

D. \( O^{2-}\)

Explanation:

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Oxygen has a total number of eight (8) electrons and as such the \( O^{2-}\) is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon that has a total number of ten (10) electrons.

Hence, \( O^{2-}\) contains the same number of electrons as an atom of neon.

The molecular weight of trans-9-(2-phenylethenyl)anthracene is 352.48 g/mol.

The molecular weight of trans-9-(2-phenylethenyl)anthracene can be calculated by adding the atomic weights of all the atoms present in the molecule. The molecular formula of this compound is C28H20, which means it has 28 carbon atoms and 20 hydrogen atoms.

The atomic weight of carbon is 12.01 g/mol and that of hydrogen is 1.01 g/mol. Therefore, the molecular weight of trans-9-(2-phenylethenyl)anthracene can be calculated as follows:

Molecular weight = (28 x 12.01) + (20 x 1.01) = 352.48 g/mol

Therefore, the molecular weight of trans-9-(2-phenylethenyl)anthracene is 352.48 g/mol.

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Answer:

SeCl6

this is the correct formula.

The correct formula for selenium hexachloride is SeCl₆.

What is selenium hexachloride

Selenium hexachloride is a compound composed of one selenium atom (Se) and six chlorine atoms (Cl). The prefix "hexa-" indicates that there are six chlorine atoms bonded to the selenium atom.

The chemical formula SeCl₆ represents the composition of selenium hexachloride, indicating that there are six chlorine atoms bonded to one selenium atom.

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Answer:

1.5625

Explanation:

the half life of an isotope is the amount of time it takes for one half of the isotope to decay

28650 is 5 half lives (28650÷5730=5)

after one half life the mass will be 25 grams

after two half lives the mass will be 12.5 grams

after 3 half lives the mass will be 6.25 grams

after 4 half lives the mass will be 3.125 grams

after 5 half lives the mass will be 1.5625 grams

Naming Ionic compounds with transition metals requires the use of a roman numeral. The charge of the metal ion must be written in the name of the compound with a roman numeral. This is because transition metals can have more than one valence (or charge).

Answer:

Hydrogen bonding is a special type of dipole-dipole interaction that occurs between the lone pair of a highly electronegative atom (typically N, O, or F) and the hydrogen atom in a N–H, O–H, or F–H bond.

When using a pH meter to monitor a stirring reaction mixture, the pH sensor electrode should be placed in the solution that is being stirred. This is important because the pH of the solution can change as the reaction progresses. By placing the electrode in the solution, it allows for accurate monitoring of the pH changes in real-time.

To place the pH sensor electrode correctly, follow these steps:
1. Ensure that the pH meter is calibrated according to the manufacturer's instructions.
2. Rinse the pH electrode with distilled water to remove any residual substances.
3. Gently dry the electrode with a tissue or soft cloth.
4. Insert the pH sensor electrode into the reaction mixture, ensuring that it is fully submerged.
5. Make sure that the electrode is positioned away from any solid particles or stirring bars that may interfere with the measurement.
6. Start the stirring process and allow the reaction to proceed.
7. Read and record the pH value displayed on the pH meter as needed during the reaction.

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Answer:

the second one is the correct answer

Answer:

its b

Explanation:

Lavoisier believed in the caloric theory.

Caloric was a self-repelling fragment that adhered to matter. The heat was a mysterious fluid stored in the matter and liberate during burning and chemical reactions. Heat walk to cold. Hot objects had caloric and cold had little caloric.

The caloric theory is a disused scientific theory that heat consists of a self-resistant fluid called caloric that flows from hotter bodies to colder bodies. Caloric was also the notion of a weightless gas that could pass in and out of pores in solids and liquids.

So we can conclude that Caloric theory The caloric theory is an outworn scientific theory that heat consists of a fluid called caloric.

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Answer:

Explanation:

d:coal!

hope i helped :)))

The literature value range of 185-186oc falls within the melting point range of 180-195oc obtained from the experiment. Therefore, it can be concluded that the purified compound is most likely the desired compound. However, it is important to note that the melting point alone cannot confirm the identity of a compound.

Other analytical techniques such as spectroscopy should also be used to verify the identity of the compound. The value of a compound refers to its worth or usefulness in a particular application. In this case, the value of the compound is based on its identity and purity, which can be determined through various analytical techniques.

Overall, the experiment was successful in purifying the compound and obtaining a melting point range that suggests the compound is the desired one.

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The reaction 2 NO2(g) ⇌ N2O4(g) is spontaneous in the forward direction at 25.0 °C based on the free energy value.

To determine the free energy value, we need to consider the change in enthalpy (ΔH) and the change in entropy (ΔS) for the reaction. We can then use the equation ΔG = ΔH - TΔS, where T is the temperature in Kelvin.

Given that the reaction is in equilibrium, the ΔG value must be zero. At 25.0 °C, we can use the equation ΔG = ΔH - TΔS to calculate the free energy. If the calculated ΔG value is negative, the reaction is spontaneous in the forward direction; if it's positive, the reaction is spontaneous in the reverse direction.

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The uncertainty in the measurement of the object's apparent shift could potentially be as large as ten degrees.

It is important to note that the uncertainty in measurement can vary depending on several factors, such as the precision of the measurement instrument, the methodology used, and the skill of the observer. While it is difficult to provide an exact value for the uncertainty without specific details, a ten-degree difference serves as a reasonable estimation.

This implies that the recorded measurements of the object's apparent shift may deviate by up to ten degrees from the true value. To reduce uncertainty, it is advisable to use more precise instruments, employ rigorous measurement techniques, and consider multiple observations to account for any potential errors.

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The unidentified compound's weight in the recipe is To find the fraction, divide the percentage by 100. 63.55 divided by the fraction equals the molecular weight. 225.4 atomic units.

It is utilized in pyrotechnics, pyrolysis, anti-fouling coatings, flame proofing, printing, photocopying, and electrolysis operations. The atomic number 29 and chemical symbol Cu are assigned to the element copper.

Cu2O, Cu2Cl2, and cuprous sulfide are a few of the significant commercial compounds of copper(I) (Cu2S). The mineral cuprite, which contains cuprous oxide as a reddish brown or red crystal or powder, naturally occurs.

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Answer:

don't you have any options

The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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The nuclide produced by the β⁻ decay of ²¹⁰Pb is ²¹⁰Bi. (option A)

During β⁻ decay, a neutron within the nucleus of ²¹⁰Pb is converted into a proton, resulting in the emission of a β⁻ particle (an electron). This process transforms the original nuclide into a new nuclide.

The atomic number of an element is determined by the number of protons in its nucleus. Since β⁻ decay involves the conversion of a neutron into a proton, the atomic number increases by one.

In the case of ²¹⁰Pb, which has an atomic number of 82, the β⁻ decay will result in an atomic number of 83, corresponding to the element bismuth (Bi).

Therefore, the nuclide produced by the β⁻ decay of ²¹⁰Pb is ²¹⁰Bi (option A).

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