1. What are the differences between lonic and covalent bonds?
Answers
Answer: Ionic bonds result from transfer of electrons, whereas covalent bonds are formed by sharing. ... Ionic bonds are electrostatic in nature, resulting from that attraction of positive and negative ions that result from the electron transfer process; charge separation between covalently bonded atoms is less extreme.
Explanation:
Related Questions
A gas occupies a volume of 50.0mL at 27°C and 630mmHg. At what temperature, in C°, would the pressure be 101.3kPa if the volume remains constant? 5. A sample of gas is initially at STP. What would the pressure be if the temperature were increased to 819°C?
Answers
Answer:
Explanation: pls read what i wrote i don't know if it's correct but i just tried to solve it
Points !!!!!!!!!!!!
Answers
Answer:
Point A, Point B, and Point C
Explanation:
Collinear points means that they share the same line. Points A, B, and C all share the line m.
How many molecules are contained in 5.78 moles of H2O? Once you have the answer, determine the log (base 10) of it and enter that value with three decimal places into the answer box. Do not add units.
Answers
The result is 25.017, which when rounded to three decimal places is 25.017. Therefore, the final answer is 25.017.
To determine the number of molecules in 5.78 moles of H2O, we need to use Avogadro's number. Avogadro's number is a constant that represents the number of particles (atoms, molecules, or ions) in one mole of a substance. It is equal to 6.022 x 10^23.
To find the number of molecules in 5.78 moles of H2O, we first need to determine the number of moles of H2O molecules present in 5.78 moles of H2O. Since each mole of H2O contains 2 hydrogen atoms and 1 oxygen atom, we need to multiply the number of moles of H2O by Avogadro's number and then multiply that result by 3 (to account for the 3 atoms in each H2O molecule).
So, the calculation would be:
5.78 moles H2O x 6.022 x 10^23 molecules/mole x 3 atoms/molecule = 1.04 x 10^25 molecules of H2O
To find the log (base 10) of this value, we can use the log function on a calculator or in Excel. The result is 25.017, which when rounded to three decimal places is 25.017. Therefore, the final answer is 25.017.
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which of the following pieces of chemical lab equipment would we use to heat up a crucible or evaporating dish to a very high temperature
Answers
Answer:Bunser buner
Explanation: It is meant to heat solid and liquid substance in the lab.
O2 is paramagnetic and F2 has the highest bond length among the given diatomic compounds.
- C2, N2 and F2 have no unpaired electrons, so they are diamagnetic in nature.
- Only O2 has unpaired electrons in it, so it is paramagnetic in nature.
- Since F atom is very small in size, there is greater electronic repulsion between the F atoms.
- Hence they repel each other and bond length increases.
- So, F2 has the highest bond length among them.
Answers
O2 is paramagnetic and F2 has the highest bond length among the given diatomic compounds.
Since C2, N2, and F2 have no unpaired electrons they are inherently diamagnetic. Only O2 contains unpaired electrons and is therefore paramagnetic. The strongest bond of diatomic species is that of carbon monoxide. The larger the element, the less the lone pair repulsion between the diatomic atoms of the diatomic molecule and the greater the binding energy.
F2 is very low due to the small atomic size of fluorine, which keeps the electrons in a compact volume and strong repulsion between non-bonded electrons. Therefore, it has weaker bonds and the lowest dissociation energy among other halogens. Nitrogen is more stable than oxygen because the bond order of nitrogen is higher than that of oxygen.
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What do you do with a chemist who died
Answer:Burium
Explain the joke then explain why this joke is funny
Answers
Answer:
Barium get it like "bury him" but since he's a chemist you referred to the element Barium.
suchhh a knee slapper
what is the Newton's second law?explain.
Answers
The net force of an object is equal to its mass times its acceleration.
what is the covalent
bonding of calcium chloride
Answers
Answer:
Calcium chloride does not have a covalent bond , it is an ionic bond (which means donation of electrons takes place ). The charge of calcium ions is +2, while the charge of sodium ions is -1. The molecule of calcium chloride contains one calcium ion (+2) and two chloride ions (-1), resulting in an overall charge of 0, or neutral.
IONIC BONDING IN CALCIUM CHLORIDE \((CaCl_2)\)
Electron sharing produces covalent compounds, while electron donation produces ionic compounds. \(CaCl_2\) is a salt with an ionic bond. This is because calcium takes up an electron to each of the chlorine atoms, resulting in \(Ca^2^+\)ions for calcium and\(Cl^-\) ions for chlorine. At room temperature, it behaves like a normal ionic halide and is solid. Calcium is a metal with a non-metal sulphate bond.
Thus , Calcium chloride have ionic bonds present on them . No covalent bonds takes place in calcium chloride.
C3.26 The diagram shows the arrangement of the outer electrons only in a molecule of ethanoic acid.
a, Name the different elements found in this
compound.
b What is the total number of atoms present in
this molecule?
C
Between which two atoms is there a double
covalent bond?
d
How many covalent bonds does each carbon
atom make?
e
Would you expect this compound to be a solid
or a liquid at room temperature? Give a reason
for your answer.
f,
Ethanoic acid will dissolve in methylbenzene.
Would you expect the solution to conduct
electricity? Give a reason for your answer.
Answers
The diagram shows the arrangement of the outer electrons only in a molecule of ethanoic acid.
elements are = Carbon, Hydrogen and oxygentotal no. of atoms = 8double bond = between one carbon and oxygentotal covalent bond = 7liquid at room temperaturea) The different elements found in this compound is Carbon, Hydrogen and oxygen.
b) The total number of atoms present in this molecule is 8.
c) Between which two atoms is there a double covalent bond is in the between of one carbon atom and oxygen atom.
d) number of the covalent bonds does each carbon atom make is 7.
e) this compound to be a liquid at room temperature
Thus, The diagram shows the arrangement of the outer electrons only in a molecule of ethanoic acid.
elements are = Carbon, Hydrogen and oxygentotal no. of atoms = 8double bond = between one carbon and oxygentotal covalent bond = 7liquid at room temperatureTo learn more about covalent bond here
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What mass of iron should be produced if 11. 0g of aluminum react with 30. 0g of iron (III) oxide?
Answers
The mass of iron should be produced if 11. 0g of aluminum reacts with 30. 0g of iron (III) oxide is 10.50 g.
To determine the mass of iron produced, we need to use stoichiometry and the balanced chemical equation for the reaction between aluminum and iron(III) oxide.
The balanced chemical equation is:
2 Al + \(Fe_{2} O_{3}\) → + 2 Fe
From the equation, we can see that 2 moles of aluminum react with 1 mole of iron(III) oxide to produce 1 mole of iron.
First, we need to determine the limiting reactant by comparing the number of moles of aluminum and iron(III) oxide.
Moles of aluminum = mass of aluminum / molar mass of aluminum
= 11.0 g / 26.98 g/mol (molar mass of aluminum)
= 0.407 mol
Moles of iron(III) oxide = mass of iron(III) oxide / molar mass of iron(III) oxide
= 30.0 g / 159.69 g/mol (molar mass of iron(III) oxide)
= 0.188 mol
Since the stoichiometric ratio of aluminum to iron(III) oxide is 2:1, we can see that 0.188 mol of iron(III) oxide requires 0.376 mol of aluminum. However, we have only 0.407 mol of aluminum, which is in excess.
Therefore, the limiting reactant is iron(III) oxide. The amount of iron produced is determined by the moles of iron(III) oxide used. Moles of iron = 0.188 mol (same as moles of iron(III) oxide)
Now we can calculate the mass of iron produced using its molar mass (55.85 g/mol):
Mass of iron = Moles of iron × Molar mass of iron
= 0.188 mol × 55.85 g/mol
= 10.50 g
Therefore, the mass of iron produced is approximately 10.50 grams.
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Determine the volume (mL) required to prepare each of the following. 665 mL of a 0.350 M MgCl2 solution using a 4.00 M MgCl2 solution.
Answers
To answer this question we have to use the rule of dilutions:
\(V1\cdot C1=V2\cdot C2\)Where V1 is the initial volume, C1 is the initial concentration, V2 is the final volume and C2 is the final concentration. In this case we need to find V1.
Solve the equation for V1 and replace C1 for 4.00M, V2 for 665mL and C2 for 0.350M
\(\begin{gathered} V1=\frac{V2\cdot C2}{C1} \\ V1=\frac{665mL\cdot0.350M}{4.00M}=58.2mL \end{gathered}\)It means that the volume required is 58.2mL.
There are only 90 naturally occurring elements on Earth but there are millions of different substances explain how this is possible and describe how it applies to at least three examples
Answers
Answer:
See explanation
Explanation:
While it is true that there are only about 90 naturally occurring elements, these elements are capable of combining with each other to form millions of substances.
Most of the substances that we see around us today result from a combination of one or more of these naturally occurring elements.
Let us look at three examples;
The carbohydrate in food is composed of carbon, hydrogen and oxygen
The stainless steel materials we use are composed of iron, carbon and other trace elements
Glass is made up of silicon, oxygen and other elements
Only 90 naturally occurring elements capable of combining with each other to form millions of substances.
Compounds:
When two or more elements combine in a certain ratio to form a molecule.
For example-
Water is made up of two hydrogen and one Oxygen ration is 2:1.
If hydrogen and Oxygen combine inn 2:2, they for Hydrogen peroxide.
Water gives life and Hydrogen peroxide can kill a person.
Other examples are,
The carbohydrate in food is composed of carbon, hydrogen and oxygen. The stainless steel is made up of iron, carbon and other trace elements. Glass is composed of silicon, oxygen and other elements.Therefore, only 90 naturally occurring elements capable of combining with each other to form millions of substances.
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taking a closer look at the two colored indicators, what major functional group is deprotonated to generate the first compound from the second
Answers
You seem to be referring to a chemical reaction involving two compounds and colored indicators. In order to determine the significant functional group that is deprotonated to generate the first compound from the second, you would need more specific information about the combinations and indicators involved.
The determination of which functional group is deprotonated depends on the specific chemical structures and their reactivity. It is crucial to consider factors such as acidity, basicity, and nucleophilicity of the compounds. Additionally, the choice of indicators can provide clues about pH changes during the reaction. To accurately identify the deprotonated functional group, it would be necessary to analyze the specific compounds, their structures, and the reaction conditions in detail.
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How much thermal energy must be added to a 87.5 g sample of ice at -25oC completely melt the entire sample? As part of your work, sketch a labelled heating curve. Circle the portion of the curve that is the focus of this question.
Answers
Answer:
4.6 kJ
Explanation:
The energy required to raise the temperature of a substance from its initial temperature to a final temperature is given by:
Q = mcΔT
Where Q = energy, c = specific heat capacity of substance and ΔT = final temperature - initial temperature
Given that:
c = 2.1 kJ/kg°C, m = 87.5 = 0.0875 kg, ΔT = final temperature - initial temperature = 0 - (-25) = 25
Q = 0.0875 * 2.1 *25
Q = 4.6 kJ
Please help How many moles of a gas sample are in 5.0 L container at 215 K and 342 kPa(The gas constant is 8.31 L kPa/mol K) Round your answer to one decimal place and enter the number only with no units.
Answers
Answer
1.0 mol
Explanation
Given:
Volume, V = 5.0 L
Temperature, T = 215 K
Pressure, P = 342 kPa
The gas constant, R = 8.31 L kPa/mol K
What to find:
The number of moles of the gas sample.
Step-step-solution:
The number of moles of the gas can be determine using the ideal gas equation formula:
\(PV=nRT\)Put the given values into the formula and calculate for n:
\(\begin{gathered} 342\times5.0=n\times8.31\times215 \\ 1710=1786.65n \\ \text{Divide both sides by 1786.65} \\ \frac{1710}{1786.65}=\frac{1786.65n}{1786.65} \\ n=0.9571\text{ mol} \\ To\text{ one decimal place,} \\ n=1.0\text{ mol} \end{gathered}\)The number of moles of the gas sample is 1.0 mol.
The VSEPR model is used mainly to do what
Answers
Please help me pretty please
Answers
Answer:
The answer would probably be C. The clock can be seen and heard.
how does the law of conservation of mass also apply to physical changes?
Answers
The law of conservation of mass states that the total mass of a system remains constant, regardless of the changes that occur within the system. This means that the total mass of the products of a physical change must be equal to the total mass of the reactants.
For example, consider the process of melting a block of ice. When the ice melts, it changes from a solid to a liquid, but its total mass remains the same. The mass of the water that results from the melting of the ice must be equal to the mass of the ice that was present before the change.
Similarly, other physical changes such as evaporation, condensation, sublimation, and freezing also follow the law of conservation of mass. In each of these processes, the total mass of the system remains constant, even though the physical state of the substance changes.
In conclusion, the law of conservation of mass applies to physical changes as well as chemical reactions, and requires that the total mass of the system remains constant, regardless of the changes that occur within the system.
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can you slap me 360°
Answers
Answer:
yes and no, it is possible, but im here and you and be any where in the world.
Explanation:
hope it helps
Answer: Yes, it’s possible if you don’t cry like a baby banana and say ouch !!
Explanation:
What is your worst fear?????????????????????????????????????
Answers
Answer:
Everyone has a fear.
Fear is something that everyone have and fear itself is worse.... so there wont be any other wort fear when it itself is the worst
Answer:
apocaplyse
Explanation:
Draw the best Lewis structure for \(\mathrm{CCl}_3^{-1}\). What is the formal charge on the C?
Answers
The formal charge on the C in is 0.
What is the formal charge on the C in ?In order to determine the formal charge on the carbon atom in , we need to consider the arrangement of electrons and bonds in the molecule. The Lewis structure for is one carbon atom (C) bonded to two oxygen atoms (O). In the structure, there is a double bond between the carbon atom and one oxygen atom, while the other oxygen atom is bonded to the carbon atom by a single bond.
To calculate the formal charge on an atom, we use the formula: Formal Charge = Valence Electrons - Lone Pair Electrons - 0.5 * Bonding Electrons.
The carbon atom in has four valence electrons. In the Lewis structure, the carbon atom is involved in two bonds and has no lone pair electrons. The carbon-oxygen double bond consists of four electrons (two bonding electrons and two lone pair electrons on the oxygen atom). The carbon-oxygen single bond consists of two electrons.
Plugging these values into the formula, we get: Formal Charge = 4 - 0 - 0.5 * (4 + 2) = 4 - 0 - 3 = 1.
Therefore, the formal charge on the carbon atom (C) in is +1.
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Which characteristic describes the traposphere
Answers
Answer:
It is the wettest layer of the atmosphere.It extends upto 10km upward from sea level.
In which pair of elements are the chemical properties of the elements most similar? Explain your reasoning.
a. sodium and chlorine
b. nitrogen and phosphorus
c. boron and oxygen
Answers
Answer:
b. nitrogen and phosphorus
Explanation:
Elements in the same column of the Periodic Table have similar chemical properties. Both N and P are in the same column.
Which diagram represents this molecule
Answers
Answer:
I think it is C
Explanation:
Hope this helps!! :)
If I'm wrong, then greatest apologies
please I need help ASAP
Lead nitrate decomposes on heating as indicated in Equation. 2Pb(NO3)2(s) 2PbO(s) + 4NO₂(g) + O₂(g) (4.8) If a volume of 112 cm³ of oxygen gas was collected at STP when a sample of lead nitrate was completely decomposed by heating, calculate the; (a) mass of the lead nitrate sample. (b) mass of lead(II) oxide produced. (c) Volume of nitrogen dioxide gas produced at STP. (Pb=207, N = 14, O=16; molar volume of gas at STP = 22.4 dm³)
Answers
Answer:
To solve this problem, we'll need to use stoichiometry and the molar ratios from the balanced chemical equation. Here's how you can calculate the values:
(a) Mass of the lead nitrate sample:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 1 mole of oxygen gas (O2). We know that the volume of oxygen gas collected is 112 cm³, which is equal to 112/1000 = 0.112 dm³ (converting cm³ to dm³).
According to the molar volume of gas at STP (22.4 dm³), 1 mole of any gas occupies 22.4 dm³ at STP. Therefore, the number of moles of oxygen gas can be calculated as:
moles of O2 = volume of O2 / molar volume at STP
moles of O2 = 0.112 dm³ / 22.4 dm³/mol = 0.005 mol
Since 2 moles of lead nitrate produce 1 mole of oxygen gas, we can determine the number of moles of lead nitrate as:
moles of Pb(NO3)2 = 2 * moles of O2
moles of Pb(NO3)2 = 2 * 0.005 mol = 0.01 mol
To calculate the mass of the lead nitrate sample, we'll use its molar mass:
mass of Pb(NO3)2 = moles of Pb(NO3)2 * molar mass of Pb(NO3)2
mass of Pb(NO3)2 = 0.01 mol * (207 g/mol + 2 * 14 g/mol + 6 * 16 g/mol)
mass of Pb(NO3)2 = 0.01 mol * 331 g/mol
mass of Pb(NO3)2 = 3.31 g
Therefore, the mass of the lead nitrate sample is 3.31 grams.
(b) Mass of lead(II) oxide produced:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 2 moles of lead(II) oxide (PbO). So, the number of moles of PbO produced is equal to the number of moles of Pb(NO3)2.
mass of PbO = moles of PbO * molar mass of PbO
mass of PbO = 0.01 mol * (207 g/mol + 16 g/mol)
mass of PbO = 0.01 mol * 223 g/mol
mass of PbO = 2.23 g
Therefore, the mass of lead(II) oxide produced is 2.23 grams.
(c) Volume of nitrogen dioxide gas produced at STP:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 4 moles of nitrogen dioxide gas (NO2). So, the number of moles of NO2 produced is twice the number of moles of Pb(NO3)2.
moles of NO2 = 2 * moles of Pb(NO3)2
moles of NO2 = 2 * 0.01 mol = 0.02 mol
Using the molar volume of gas at STP, we can calculate the volume of nitrogen dioxide gas:
volume of NO2 = moles of NO2 * molar volume at STP
volume of NO2 = 0.02 mol * 22.4 dm³/mol = 0.448 dm³
Therefore, the volume of nitrogen dioxide gas
How are plate tectonics and the rock cycle connected? Select the best answer from the choices below.
a
The rock cycle keeps the plates from moving too far apart
b
Igneous rocks that form from magma are a major part of the rock cycle
c
The heat from the mantle that fuels plate tectonics also drives the rock cycle
d
Plate tectonics causes sedimentary rocks to turn into metamorphic rocks
Answers
How many kilograms are there in 81. 2 Mg? Express your answer in scientific notation
Answers
As there are 1,000,000 kg in 1 Mg, we must multiply by 1,000,000 to convert from Mg (megagrams) to kilogrammes. Therefore:
8.12 × 107 kg or 81.2 Mg is equal to 81.2 x 1,000,000 kg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
, I apologize for my mistake in the previous response. The conversion from Mg to kg is indeed done by multiplying by 1,000,000. Thank you for providing the correct calculation and explanation. The answer is:
81.2 Mg = 81.2 x 1,000,000 kg = 8.12 x 10^7 kg
Expressed in scientific notation, there are 8.12 x 10^7 kilograms in 81.2 Mg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
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1. At the onset of puberty,______starts secreting high pules of ________
Answers
At the onset of puberty, the pituitary gland in the brain starts secreting high pulses of hormones called gonadotropins.
The pituitary gland is a small, bean-shaped gland located at the base of the brain, in a small depression of the skull called the sella turcica. It is often referred to as the "master gland" because it controls and regulates the functions of several other glands in the body. The pituitary gland is divided into two main parts: the anterior pituitary and the posterior pituitary.
The pituitary gland produces and releases several hormones, including growth hormone, thyroid-stimulating hormone, adrenocorticotropic hormone, follicle-stimulating hormone, luteinizing hormone, prolactin, and oxytocin. These hormones play critical roles in regulating growth and development, metabolism, reproduction, and the body's response to stress.
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A piece of chalk becomes shorter as it is used. Which of the following is NOT true of the shorter piece of chalk?
w
O A. Its mass has changed.
OB. Its shape has changed.
O C. Its volume has changed.
OD. Its characteristic properties have changed.
Answers
Answer:
D. Its characteristic properties have changed.
im sorry if it is not correct, i mean- i am in fifth grade
Ice that is added to water melts. The water molecules become less ordered until both the water and ice are at one phase and equilibrium is reached. When this occurs, the molecules are randomly distributed. What happens to the entropy as the system approaches equilibrium?
A. The entropy is near its minimum.
B. The entropy does not change.
C. The entropy is near its maximum.
D. The system cannot approach equilibrium
Answers
As the system approaches equilibrium, entropy is near its maximum.
The entropy is said to be the degree of disorderliness of a system. Ice is a crystal in which the molecules are perfectly ordered so its entropy is at a minimum.
As ice melts, the molecules gain more energy and separate from each other. There is now an increase of particles in the system leading to an increase in entropy.
Hence, when the system is at equilibrium, entropy is at a maximum.
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