20 points to whoever can answer these 3 questions correctly
Pt. 2

20 Points To Whoever Can Answer These 3 Questions CorrectlyPt. 2
20 Points To Whoever Can Answer These 3 Questions CorrectlyPt. 2

Answers

Answer 1

Answer:

1. AlBr3

2. 2

3. sulfuric acid

Explanation:


Related Questions

which molecule has a no net dipole moment (zero dipole moment) group of answer choices cbr4 cis-1,2-dibromoethene trans-1,2-dibromoethene 1,1-dibromoethene more than one of these choices.

Answers

CBr₄ has no net dipole moment.

Net dipole moment is the total sum of the bond moments in a molecule. It is a measure of the polarity of a molecule. In other words, the dipole moment of a molecule indicates the direction and magnitude of its polarity. A molecule has no net dipole moment when it is nonpolar.

This happens when the dipole moments of its polar bonds cancel each other out. There are various types of molecules, including linear, bent, trigonal planar, tetrahedral, and pyramidal. These molecules can be polar or nonpolar, depending on their geometrical structure and bond polarity.

CBr₄ has a tetrahedral shape, with four Bromine atoms and a Carbon atom at the vertices of the tetrahedron. The C-Br bonds are polar because Bromine is more electronegative than Carbon. However, the four C-Br bond dipoles are arranged in a tetrahedral structure, such that they cancel out each other. Thus, CBr₄ has no net dipole moment.

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If the pellets represent molecules of water, what do you think are the main differences among molecules of ice, water, and vapor?


Thanks

Answers

Answer:

Ice: solid and rigid. Water: Liquid and sloshy Gas: light and not dense.

Explanation:

Up ^

what is the correct composition of a neutral atom of helium-4?

Answers

Thee correct composition of a neutral atom of helium-4 is to consists two protons and two neutrons.

Helium-4 is a stable isotope of the element helium. It is by far the most abundant of her two naturally occurring isotopes of helium, accounting for about 99.99986% of the helium on Earth. Its nucleus is the same as an alpha particle, consisting of two protons and two neutrons. The atomic number of helium is 2. The 4 after the element name indicates the mass number of the helium 4 atom, and the neutral atom always has a number equal to the total number of protons and neutrons in its nucleus. Helium 4 atoms without electrons are alpha particles. Alpha particles are emitted from unstable nuclei.

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Give the balanced chemical equation for the formation of H3PO4

Answers

Answer:

P4O10 + 6 H2O → 4 H3PO4

Explanation:

consider the reaction: calculate the free energy change ( for the reaction at 393 k if for the reaction is -233kj and -424 j/k respectively. at what temperature the reaction is spontaneous? assume do not depend on temperature.

Answers

The free energy change (∆G) for the reaction at 393 K is calculated as -66,968 J, indicating that the reaction is spontaneous at that temperature.

To calculate the free energy change (∆G) for the reaction at 393 K, we can use the equation:
∆G = ∆H - T∆S
Given that ∆H = -233 kJ and ∆S = -424 J/K, we need to convert the units of ∆H to J:
∆H = -233 kJ = -233,000 J
Now we can substitute the values into the equation:
∆G = -233,000 J - (393 K) * (-424 J/K)
∆G = -233,000 J + 166,032 J
∆G = -66,968 J
Since the reaction is spontaneous when ∆G < 0, we can conclude that the reaction is spontaneous at 393 K.
The given information assumes that the reaction does not depend on temperature.

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A central theme in chemistry is that we study ______ changes in matter to understand their ______ causes.

Answers

A central theme in chemistry is that we study Observable changes in matter to understand their Unobservable causes.

Matter is a substance made up of a variety of sorts of particles that occupies physical house and has inertia. According to the standards of current physics, the a variety of sorts of particles every have a particular mass and size. The most acquainted examples of fabric particles are the electron, the proton and the neutron.

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How Many milligrams are in 94.2g?

How Many milligrams are in 94.2g?

Answers

Answer:

94,200 milligrams in 94.2 grams

To get answer multiply 94.2 by 1000.

Answer:

there is 94,200 milligrams in 94.2 grams

Explanation:

hope this helps, because 1,000 milligram is 1 gram

so 1,000x94.2(grams)=94,200

HOPE THIS HELPS A LITTLE

according to the video raw to ready: bombardier, what was added to sand by the phoenician sailors to accidently produce glass

Answers

Sand was accidentally turned into glass by the Phoenician seafarers by the use of natron.

What is the glass's chemistry?

SiO2 is the primary component of flat glass (silica sand). This has a high melting point of around 1700 degrees Celsius, and in this form it resembles syrup on a very cold day.

What makes glass useful in chemistry?

Glass composed of borosilicate is a leader in general analytical applications due to its straightforward composition, excellent chemical resistance, and strong thermal shock capabilities. The advantages of borosilicate glass are all present in 96% silica glass, which also has outstanding thermal shock resistance and high service temperature characteristics.

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In a controlled experiment, the single factor manipulated by the researcher is
the dependent variable and the responding factor that is measured is the
independent variable.
true or false

Answers

Answer:

False

Explanation:

It is the opposite. A good way to remember is the that the dependent variable depends on the independent variable.

What is a molecular orbital energy diagram? and draw it?

Answers

An atomic orbital is a three-dimensional representation of the position of an electron relative to an atom's nucleus. In other words, there is a maximal likelihood of discovering an electron in an atomic orbital.

A molecular orbital diagram, also referred to as a MO diagram, is a qualitative descriptive tool used in conjunction with the linear combination of atomic orbitals (LCAO) approach and general molecular orbital theory to describe chemical bonding in molecules. These ideas are founded on the fundamental assumption that as atoms unite to form molecules, a certain number of atomic orbitals combine to produce the same number of molecular orbitals, even though the electron distribution of the orbitals may differ. This approach becomes more difficult when talking about even very straightforward polyatomic molecules, like methane. For straightforward diatomic compounds like carbon monoxide, oxygen, and dihydrogen, it performs admirably. The existence of some molecules and the absence of others can be explained via MO diagrams. They are able to forecast bond strength as well.

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What is a molecular orbital energy diagram? and draw it?

Which statement best describes a scientific question?
It must be based on a hypothesis.
It must be supported by data.
It must be testable.
It must be original.

Answers

Answer:

It must be based on a hypothesis

Explanation:

if i remember correctly

A. It must be based on a hypothesis.

describe what sort of problems would occur in the experiment if the copper electrodes were completely covered by water. how would these problems look in your readings?

Answers

The experiment would not function properly if the copper electrodes were totally submerged in water because then there would be no way for the electrical current to travel through the solution.

If the copper electrodes were completely covered by water, the electrical current would not be able to pass through the solution, and the experiment would not work properly. As a result, no reduction or oxidation reaction would occur, and the electrochemical cell would not produce any voltage or current.

This would be visible in the readings as a flat line or zero voltage or current reading on the voltmeter or ammeter. Additionally, the copper electrodes could corrode or dissolve in water over time, leading to inaccurate readings or a loss of the electrodes altogether.

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can you pls help with q1 and q3

can you pls help with q1 and q3

Answers

Answer:

1.

A covalent bond forms when two atoms Share a pair of Electrons.

Atoms form covalent bonds to get a full Outer (Also Called Valence) shell of electrons.

3.

See Attached Image for Dot structure and Lewis Structure (2D).

can you pls help with q1 and q3

Zelda noticed a puddle outside her front door. She saw that the puddle got smaller every day, until the 3rd day when it was completely gone. The next week, she noticed the puddle again. This time the puddle was gone the next day. Since the sun was out the second week but not the first week, Zelda hypothesized that the heat from the sun was the reason for the water evaporating at a faster rate. If she were to set up two containers with equal amounts of water, what would be the best way for Zeldato test her hypothesis\

Answers

Answer: Zelda should place one container of water in sunlight (by a window or outdoors) and the other container in a dark room (closet) away from the sun.

Explanation: This would allow Zelda to test two different settings (sun and no sun) so she can test her hypothesis.

What is an atomic theory?
A. An idea about what atoms are like
B. A prediction about nuclear reactions
C. A theory about how atoms first came to be
D. A theory about gravity

Answers

Answer A



Explanation

The theory that all matters made up of time indivisible particles

Answer:

a

Explanation:

Please help and thank you

Please help and thank you

Answers

Answer:

C

Explanation:

This is a chemical reaction, because only the electrons were rearranged

Please help with this chemistry.!

Please help with this chemistry.!

Answers

Answer:

Look at explanation.

Explanation:

To convert from mol to mass, you multiply the moles by the molar mass of the substance.

a. (1.09e22)*121.76 = 1.33e24

b. (4.13e14)*195.084 = 8.06e16

c. (1.07e23)*107.8682 = 1.15e25

d. (9.06e24)*51.9961 = 4.72e26

which set of elements is arranged in order of increasing electronegativity?which set of elements is arranged in order of increasing electronegativity? p < f < si < s s < f < p < si f < s < p < si si < p < s < f

Answers

The correct order of increasing electronegativity for the given set of elements is: s, p, si, f, where fluorine (F) has the highest electronegativity and sodium (Na) is not included in the set.

Electronegativity is a property that describes the tendency of an atom to attract electrons towards itself when it is part of a chemical bond. In general, electronegativity increases across a period from left to right and decreases down a group in the periodic table.

Looking at the given sets of elements: p, f, si, s and s, f, p, si, we can determine the order of increasing electronegativity.

The correct set of elements arranged in order of increasing electronegativity is: s, p, si, f.

Fluorine (F) is the most electronegative element in the periodic table, and it attracts electrons strongly due to its small atomic size and high effective nuclear charge. Therefore, it has the highest electronegativity.

Following fluorine, oxygen (O) has a higher electronegativity than sulfur (S), which in turn has a higher electronegativity than phosphorus (P). This is because electronegativity generally increases across a period from left to right.

Silicon (Si) is less electronegative than phosphorus but more electronegative than sulfur. It is positioned in the middle of the order.

Lastly, sodium (Na) is less electronegative than silicon and is not included in the given set.

(Note: The set s, f, p, si is not in the correct order of increasing electronegativity, as fluorine should have the highest electronegativity.)

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I need help with this

I need help with this

Answers

16b. divide value by 1000.
7966.4/1000
= 7.9664 dam.
17b. divide value by 1000.
509.1/1000
= 0.5091 hg.
18b. multiply by 10.
11.4*10
= 114 mg.

How many grams of silver metal are produced from Ag (aq) in 2.10 h with a current of 3.50 A? (F = 96,500 C/mol)

Answers

To calculate the amount of silver metal produced from Ag (aq) in 2.10 h with a current of 3.50 A, we can use the formula: moles of Ag = (current x time) / (Faraday's constant).

The formula for calculating the moles of a substance that is produced or consumed during electrolysis is: moles = (current x time) / (Faraday's constant), where current is the electric current in amperes (A), time is the time in seconds (s), and Faraday's constant is the electric charge per mole of electrons, which has a value of 96,500 coulombs per mole (C/mol).

Calculate the total charge (in Coulombs) passed through the solution.
Total charge (Q) = Current (I) x Time (t)
Q = 3.50 A x (2.10 h × 3600 s/h)
Q = 3.50 A x 7560 s
Q = 26,460 Coulombs
Step 2: Determine the moles of electrons (n) using Faraday's constant (F).
n = Q / F
n = 26,460 C / 96,500 C/mol
n = 0.274 moles of electrons
Step 3: Use the stoichiometry of the half-reaction to determine moles of Ag produced.
The half-reaction for the reduction of Ag+ is:
Ag+ (aq) + e- → Ag (s)
Since the stoichiometry is 1:1, 0.274 moles of electrons will produce 0.274 moles of Ag.
Step 4: Calculate the mass of Ag produced using the molar mass of Ag (107.87 g/mol).
Mass of Ag = moles of Ag × molar mass of Ag
Mass of Ag = 0.274 mol × 107.87 g/mol
Mass of Ag ≈ 24.7 grams.

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Explain Why are quartz, ,
ice, and calcite considered
to be minerals, while coal, sugar,
and glass are not?

Answers

Answer:

To be a mineral a substance must meet five requirements:

1 .naturally occurring (not made by humans)

2.inorganic (not produced by an organism)

3.solid

4.a limited range of chemical compositions

5.ordered atomic structure

Explanation:

The total number of atoms represented by the formula (NH4)2Cr2O7 is

a. 23

b. 11

c. 19

d. 18

will give branliest for quick and correct answers

Answers

Answer:

its 19 I'm pretty sure about

Answer:

c is correct and my girl friend

In an experiment, how many variables should you change at a time? And why?

Answers

Answer:

it should test one variable at a time.

Explanation:                                                                                                  because you will not be able to tell which variable is responsible for the observed results.

In the harber-bosch process, the reactant nitrogen is drawn from the air while the hydrogen is produced by burning methane gas (CH4) in a series of processes that can be simplified as: CH4 + 2H2O —> CO2 + 4H2 3a. A small ammonia plant used 123,000 g of H2 gas per day. Determine the mass of CO2 (in g) that will be released as the H2 is produced. Show all work

Answers

Answer:Main Answer:

The mass of CO2 released in the production of 123,000 g of H2 gas is 265,200 g.

Explanation: From the given equation, we can see that the production of 4 moles of H2 requires the combustion of 1 mole of CH4, resulting in the release of 2 moles of H2O and 1 mole of CO2. The molar mass of H2 is 2 g/mol, and the molar mass of CO2 is 44 g/mol. Therefore, the mass of CO2 released in the production of 123,000 g of H2 is (123,000/2) x (1/4) x 44 = 265,200 g.

When 496.5 grams of pb(no3)2 reacts completely with kbr, how much will the
total mass of the products be? explain your answer.
mass mass problem - mass of reactant to mass of product

Answers

The total mass of the items is 853.8 g, according to the solution.

How much do the products weigh in total?

We are aware that in order to determine the mass of the products and the overall mass of the products produced by the reaction, the stoichiometric principles must be applied.

The answer to the question states that 496. 5 grammes of lead II nitrate react with potassium bromide in a way that the lead II nitrate is totally consumed in the reaction. This indicates that the lead II nitrate is the reaction's limiting reactant.

According to the given information:

Number of lead II nitrate moles

= 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced

= 1.5 moles * 367 g/mol

= 550.5 g

If 2 moles of potassium nitrate are created from 1 mole of lead II nitrate

1.5 moles of lead II nitrate produces

=  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate

= 3  moles * 101.1

= 303.3 g

Total mass produced

= 550.5 g + 303.3 g

= 853.8 g

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14. A force acts for 0.2 second on a body of mass 80 kg at rest and produces a velocity of 10 ms¹.Find the magnitude of the force.

Answers

The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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What role does respiration play in the cycling of carbon?

Answers

Cellular respiration and photosynthesis are important parts of the carbon cycle. The carbon cycle is the pathways through which carbon is recycled in the biosphere. While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere

The electromotive force (EMF) of a cell can be calculated with the following formula: Question options: a) EMFoxidation + EMFreduction b) ( EMFoxidation + EMFreduction ) x 96500 / n c) ( EMFoxidation × EMFreduction ) / 96500 d) ( EMFoxidation + EMFreduction ) / 96500 e) EMFoxidation − EMFreduction

Answers

The correct formula for calculating the electromotive force (EMF) of a cell is (EMFoxidation + EMFreduction) - option a is correct.

Here EMFoxidation represents the standard reduction potential of the oxidizing agent and EMFreduction represents the standard reduction potential of the reducing agent. This formula is based on the concept of the Gibbs free energy change (ΔG) of the cell reaction, which is related to the EMF by the equation ΔG = -nFE, where n is the number of electrons transferred in the reaction, F is the Faraday constant (96500 C/mol), and E is the EMF.

By using the standard reduction potentials of the oxidizing and reducing agents, we can calculate the standard EMF of the cell at standard conditions (1 M concentration, 1 atm pressure, and 25°C temperature). The EMF is a measure of the cell's ability to drive an electric current through an external circuit, and it depends on the concentrations and temperatures of the reactants and products.

The correct answer to the question is thus (a) EMFoxidation + EMFreduction.

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when a scientist is beginning the process what is the key term she or he must ask in order to begin?

A: when or where
B:why or how
C: who or how many?
D: which or what

plz help thank you

Answers

Answer:

B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how

write a balanced half-reaction describing the oxidation of solid iron to aqueous iron(ii) cations.

Answers

Your balanced half-reaction describing the oxidation of solid iron to aqueous iron(II) cations is:

Fe(s) → Fe²⁺(aq) + 2e⁻

To write a balanced half-reaction describing the oxidation of solid iron to aqueous iron(II) cations, follow these steps:

1. Write the unbalanced half-reaction: Fe(s) → Fe²⁺(aq)
2. Balance the atoms other than oxygen and hydrogen: Fe(s) → Fe²⁺(aq) (atoms are already balanced)
3. Balance the oxygen atoms (none in this reaction, so skip this step)
4. Balance the hydrogen atoms (none in this reaction, so skip this step)
5. Balance the charge by adding electrons: Fe(s) → Fe²⁺(aq) + 2e⁻

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