How many bonds can a carbon atom form?
A. 3
O B. 4
C. 2.
O D. 1

Answers

Answer 1

Answer:

B)4

Explanation:


Related Questions

which function of lysosomes is carried out by vacuoles in plant cells

Answers

Answer:

Lysosomes are predominantly found in eukaryotic animal cells and are responsible for breaking down cellular debris

Explanation:

The first ionization energy of Mg is 735 kJ/mol. The second ionization energy is Select one: a. 735 kJ/mol b. less than 735 kJ/mol c. greater than 735 kJ/mol d. More information is needed to answer this question. e. None of these.

Answers

Taking into account the definition of ionization energy, the correct answer is option c: greater than 735 kJ/mol.

Electrons are held in atoms by their attraction to the nucleus, which means that energy is needed to remove an electron from the atom.

Ionization energy, also called ionization potential, is the necessary energy that must be supplied to a neutral, gaseous, ground-state atom to remove an electron from an atom. When an electron is removed from a neutral atom, a cation with a charge equal to +1 is formed.

The further away the electron is from the nucleus, the easier it is to remove it, that is, the less energy is needed.

The second ionization energy represents the energy required to start a second electron. Its value is always greater than the first ionization energy because the volume of a positive ion is less than that of the neutral atom and the electrostatic force is greater in the positive ion than in the atom.

In other words, the energy required to remove a second electron is called the second ionization energy, and due to the difficulty of removing an electron from a positive particle, its value is greater than that of the first ionization energy.

Finally,  the correct answer is option c: greater than 735 kJ/mol.

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O2– has how many electrons?

Answers

Answer:

eight electrons

Explanation:

Oxygen has atomic number eight. This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons. In an oxygen ion with a 2− charge, the number of protons is still 8, but the number of electrons is 10.

The kinetic energy of an object depends on how much space an object takes up True or false?

Answers

the kinetic energy does not depend on how large the object is but more on how heavy it is. hence False

2. Using diagrams, briefly explain the following; i. Solvus ii. Eutectic iii. Eutectoid iv. Peritectic

Answers

Answer:

Solvus: A solvus is a line or surface on a phase diagram which separates a homogeneous solid solution from a field of several phases which may form by exsolution or incongruent melting.

Eutectic: Relating to or denoting a mixture of substances that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them.

Eutectoid: relating to or denoting an alloy which has a minimum transformation temperature between a solid solution and a simple mixture of metals.

Peritectic: A peritectic reaction is a reaction where a solid phase and liquid phase will together form a second solid phase at a particular temperature and composition.

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identify 2 ways to measure mass​

Answers

Answer:

The two ways to measure mass are subtraction and taring.

4(a) Why doesn't the water flow out when the hand that presses the cardboard is removed? *

1. water inside glass is lighter
2. there is much water inside the glass
3. cardboard is supported by air pressure
4.
cardboard is strong enough to hold the water

Answers

Air pressure is the weight of a column of air pushing down on an area. ... Because of the air pressure pushing up on the card, the card will stay on the glass and the water will not spill out.

Which functional group does the molecule below have?
A. Ether
B. Amino
C. Carbonyl
D. Hydroxyl
SUBV

Answers

Answer:

Ether is the correct answer

Explanation:

It is based.

write the chemical formula of the following compounds sodium sulfate magnesium chloride aluminum nitrate ammonium sulfate​

Answers

Explanation:

Magnesium chloride = MgCl₂

aluminum nitrate= Al(NO₃)₃

ammonium sulfate=( NH₄)₂SO₄

e. How many grams of chlorophenol are there in 1.00 litre of a 47.0 mM solution? Show your calculations
in full.
(6 marks)

Answers

The mass of the chlorophenol  is obtained from the number of moles and the volume of the solution.

Recal that;

Number of moles = concentration of solution * volume of solution

Concentration = 47.0 mM  or 47.0 * 10^-3 M

Volume = 1.00 litre

Number of moles = 47.0 * 10^-3 M * 1.00 litre

Number of moles = 47.0 * 10^-3 moles

Also;

Number of moles = mass/molar mass

mass = Number of moles * molar mass

Mass = 47.0 * 10^-3 moles * 128.6 g/mol

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Mass = 6.0442 g

what are the properties of alkali earth metals​

Answers

shiny.
silvery-white.
somewhat reactive metals at standard temperature and pressure.
readily lose their two outermost electrons to form cations with a 2+ charge.
low densities.
low melting points.
low boiling points.

Properties of the Akali Earth Metals.

They have low melting points.They have low boiling points.They are shiny in nature.They are generally Silvery-white in colour.They have low densities.They are highly metallic.They are good conductors of electricity.They are strong reducing agents.They are highly reactive.

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Draw out a Simple electro Chemical Symbols in ions​

Answers

Answer:

In redox reactions, electrons are transferred from one species to another. If the reaction is spontaneous, energy is released, which can then be used to do useful work. To harness this energy, the reaction must be split into two separate half reactions: the oxidation and reduction reactions. The reactions are put into two different containers and a wire is used to drive the electrons from one side to the other. In doing so, a Voltaic/ Galvanic Cell is created.

Explanation:

When a redox reaction takes place, electrons are transferred from one species to the other. If the reaction is spontaneous, energy is released, which can be used to do work. Consider the reaction of a solid copper (Cu(s)) in a silver nitrate solution (AgNO3(s)).

he AgNO3(s) dissociates in water to produce Ag+(aq) ions and NO­­−3(aq) ions. The NO3-(aq) ions can be ignored since they are spectator ions and do not participate in the reaction. In this reaction, a copper electrode is placed into a solution containing silver ions. The Ag+(aq) will readily oxidize Cu(s) resulting in Cu2+(aq), while reducing itself to Ag(s).

This reaction releases energy. When the copper electrode solid is placed directly into a silver nitrate solution, however, the energy is lost as heat and cannot be used to do work. In order to harness this energy and use it do useful work, we must split the reaction into two separate half reactions; The oxidation and reduction reactions. A wire connects the two reactions and allows electrons to flow from one side to the other. In doing so, we have created a Voltaic/ Galvanic Cell.

Is the covalent bond BH2CL a polar nonpolar or ionic compound

Answers

BH2Cl is a polar compound because the molecule is non-symmetrical.

An ionic bond is usually formed between atoms having a high magnitude of electronegativity difference between them while covalent molecules tend to have a narrower range of electronegativity difference between atoms in the molecule.

In-between the two extremes are the polar covalent bonds which result from a significant electronegativity difference but less than that required for an ionic bond.

The B-Cl bond in BH2Cl is polar and the entire molecule is non-symmetrical hence the BH2Cl is a polar compound.

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Ribbon diagrams show secondary structures and appear less detailed than other model types. In one to two sentences, give a reason that chemists would use ribbon diagrams. What type of information do they provide? (SHORT ANSWER)

Answers

Chemists prefer ribbon diagrams because they make the tertiary structure of the protein molecule easier to trace.

A protein molecule can be represented using several kinds of models. The ball and stick models which are common representations for other molecules can also be applied in the case of protein molecules.

However, the ribbon diagrams are preferred by chemists because they make the  tertiary structure of the protein molecule easier to trace. Also, the ribbon diagram shows the overall path and organization of the protein backbone in the protein molecule.

This kind of structure was first introduced by  Jane S. Richardson  around 1981.

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Answer:

Ribbon diagrams look like the name they hold- ribbons. Therefore, they would be a good option if one were to trace or copy the diagram onto another document, etc. Also, they depict protein very well so if a chemist were studying different types of protein he/she would utilize a ribbon diagram.

Explanation:

What kind of chemical do we release when we help others?

Answers

Answer:

oxytocin is the answer

Explanation:

oxytocin

Oxytocin.

When we help other people out, a chemical in our brain Called oxytocin releases.

Name the reaction & mechanism of the following reactions:

Answers

Answer:

double displacement reaction

Answer:

DECOMPOSITION REACTIONDOUBLE DISPLACEMENT REACTIONDISPLACEMENT REACTION

Explanation:

SEE THE IMAGE FOR SOLUTION

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5.
5.555 x 1014 ounces = ? millipounds

Answers

3.5678 is your answer

Please help thank you (15 points)

Answers

Answer:

C.

Explanation:

The arrows represent the Earth spinning on its own axis in this picture.

Please help due today

Answers

I think it’s A not sure though

Using the venn diagram, determine the similarities and differences between analytical chemistry and chemical analysis

Answers

Answer:

Explanation:

Modern analytical chemistry can be defined as a science concerned with the development of general approaches, methods, and tools for the study of chemical compositions of substances and analysis of objects; chemical analysis is restricted to the acquisition of information about chemical compositions of substances.

Which of the following describes an atom?
A. smallish units of two hydrogen joined together
B. 6 protons six neutrons in the nucleus and six electrons in the electron cloud
C. hydrogen chemically combined with an oxygen
D. 6 protons 6 neutrons in the nucleus and seven electrons in the electron cloud​

Answers

Answer:

Correct answer is option (3) .

Explanation:

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Which has higher specific heat capacity, iron or brick (Concrete

Answers

Answer:

Brick

Explanation:

Answer:

Explanation:

Brick has a heat capacity of 840 J/kg degree Centigrade.

That means that if you have 1 kg of brick, you will need to add 840 joules of heat to get it to go up 1 degree C.

The heat capacity of iron is 450 J/kg (degree centigrade).

Brick has the higher heat capacity. Undefined in all of this is a joule. It is a work unit. The problem is that to define a joule accurately, you need to bring in a lot of other units. Content yourself by understanding that both the iron and the brick are measured in the same units -- Joules.

Which substance is a binary acid?
hydrochloric acid
phosphoric acid
nitrous acid
sulfuric acid

Answers

Answer:

phosphoric

Explanation:

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Answer:

hydrochloric acid is a substance that is a binary acid .

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Why is the half-life of a radioisotope important for radioactive dating?
A. The half-life forms a type of clock used to calculate time passed.
B. The half-life of a radioisotope tells how long ago the element was
formed.
C. The age of an object is equal to the radioisotope with the longest
half-life in it.
D. The half-life gives the period over which the radioisotope doesn't
change.

Answers

Answer:Dating Using Radioactive Decay

The best-known techniques for radioactive dating are radiocarbon dating, potassium-argon dating and uranium-lead dating.

After one half-life has elapsed, one half of the atoms of the nuclide in question will have decayed into a “daughter” nuclide.

Explanation:d

what is the chemical formula of ( Rust ) ??​

Answers

Answer:

[tex]Fe_2O_3[/tex]

Explanation:

The formula of Rust is Fe2O3 and also known as ferric oxide or iron oxide

------------------------

OAmalOHopeO

------------------------

Organelles called chloroplasts provide food for the plant by using the sun's energy. What
Is this process called?

A. mitochondria
B. mutation
C. photosynthesis
D. glucose

Answers

Answer:

Photosynthesis

Explanation:

Photosynthesis is a key process in plantsIn this process plants use Sunlight,water and Carbon dioxide to produce Carbohydrates .Chloroplasts take key role in it.

7 f Find the volume in dm3 and in mole of 0.505m of NaoH required to react with 40ml of 0.505m
of H₂SO4 Solution​

Answers

The volume of NaOH required is 0.08 dm³

To solve this question, we'll begin by writing the balanced equation for the reaction between H₂SO₄ and NaOH. This is illustrated below:

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

Mole ratio of the acid, H₂SO₄ [tex](n_{A}) = 1[/tex]

Mole ratio of the base, NaOH [tex](n_{B}) = 2[/tex]

Next, we shall determine the volume of NaOH required to react with H₂SO₄. This can be obtained as follow:

Molarity of the base, NaOH [tex](M_{B}) = 0.505 M[/tex]

Volume of the acid, H₂SO₄ [tex](V_{A}) = 40 mL[/tex]

Molarity of the acid, H₂SO₄ [tex](M_{A}) = 0.505 M[/tex]

Volume of the base, NaOH [tex](V_{B})[/tex] =?

[tex]\frac{M_{A} * V_{A}}{M_{B} * V_{B}} = \frac{n_{A}}{n_{B}}\\\\\frac{0.505 * 40}{0.505 *V_{B}} = \frac{1}{2}\\\\\frac{20.2}{0.505 *V_{B}} = \frac{1}{2}[/tex]

Cross multiply

[tex]0.505 * V_{B} = 20.2 * 2\\0.505 * V_{B} = 40.4[/tex]

Divide both side by 0.505

[tex]V_{B} = \frac{40.4}{0.505}\\\\V_{B} = 80 mL[/tex]

Finally, we shall convert 80 mL to dm³. This can be obtained as follow:

[tex]1000 mL = 1 dm^{3}\\\\Therefore,\\\\80 mL = \frac{80 mL * 1dm^{3}}{1000 mL}\\\\80 mL = 0.08dm^{3}[/tex]

Therefore, the volume of NaOH required is 0.08 dm³

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Whats minimum temperature for scrabble eggs

Answers

Answer:

of 160° F. Scrambled eggs need to be cooked until firm throughout with no visible liquid egg remaining.

hope it's help you.

Answer:

144-158°

Explanation:

Why should an acid be handled with caution​

Answers

Explanation:

acid should be handled with caution because it is dangerous as it may burn the skin

Please help due today

Answers

Answer:

OPTION B .

AS THEY WILL PRODUCE CO,CO2 WHICH WILL MAKE AIR POLLUED AS WELL AS RISE THE TEMPERATURE

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