Which of the following is the correct definition of density?
1. The amount of volume per given mass
2. The amount of space that an object occupies
3. The amount of mass per given volume
4. The amount of matter contained in an object

Answer: What happens when a single molecule is replaced by a hydrogen by an oh group

Explanation:

Answer:

x-2 = 0

x = 2

hope this was help full

I'd say by Neutralization so as to make it Harmless.

Or

You Over dilute it with Water

Note: You pour the acid into water...Not water into acid as it may spill and burn your skin.

Answer: D

Explanation:

Answer:

Yeah, if you have the atomic number and neutron number

[tex]mass = protons + neutrons[/tex]

protons is the atomic number

A. 0.2 mole of HCl is needed for the reaction

B. The molarity of NaOH solution is 0.04 M

C. The molarity of HCl is 0.043 M

Molarity is defined as the mole of solute per unit litre of the solution.

We'll begin by calculating the number of mole of NaOH in the solution.

Volume = 0.1 L

Molarity of NaOH = 2 M

Mole = Molarity x Volume

Mole of NaOH = 2 × 0.1

Finally, we shall determine mole of HCl.

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of NaOH required 1 mole of HCl.

Therefore, 0.2 mole of NaOH will also require 0.2 mole of HCl.

Thus, 0.2 mole of HCl is needed for the reaction.

HCl + NaOH —> NaCl + H₂O

From the balanced equation,

Mole ratio of the acid, HCl (nA) = 1

Mole ratio of the base, NaOH (nB) = 1

From the question given above above,

Volume of acid, HCl (Va) = 0.025 L

Molarity of acid, HCl (Ma) = 0.05 M

Volume of base, NaOH (Vb) = 0.034 L

Mava / mbvb = na/nb

0.05 x 0.025 / Mb x 0.034 = 1

0.00125 / Mb x 0.034 = 1

Cross multiply

Mb x 0.034 = 0.00125

Divide both side by 0.034

Mb = 0.00125 / 0.034

Mb = 0.04 M

Therefore, the molarity of NaOH is 0.04 M

From the question given above above,

Volume of base, NaOH (Vb) = 0.054 L

Molarity of base, NaOH (Mb) = 0.1 M

Volume of acid, HCl (Va) = 0.125 L

Mole ratio of the acid, HCl (nA) = 1

Mole ratio of the base, NaOH (nB) = 1

Mava / mbvb = na/nb

Ma x 0.125 / 0.1 x 0.054 = 1

Ma x 0.125 / 0.0054 = 1

Cross multiply

Ma × 0.125 = 0.0054

Divide both side by 0.125

Ma = 0.0054/0.125

Therefore, the molarity of the HCl is 0.043 M

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Answer:

1. Based on the two video clips on titration from the links provided earlier on the watsApp Group and a study master, carry out the following tests , a define the forms(i) titrant (2) Strand or analyte (3) Indicator (4) end point (5) titration. b. write in point form (list), the steps inolved in titration (including the relevant apparatus used) - write a typed Laboratory report for this assignment where there is no data to put in, include the relevant headings but without data. (For those who can attempt to do some calculations based the presentations, you are encouraged The report should be handed in when you open back to college​

Explanation:

the answer is end point

Answer:

Jupiter.

Explanation:

Jupiter has the fastest axial rotation time (day) in the list of answers, based on the fact that its day is only 10 hours long.

Answer:

5.48 x 10´23 atoms

Explanation:

Use PV = nRT

V = 20 L

R= constant = 0,08205746 L atm / (K mol)

stp means stantdard temperature and pression

T = 273 K

P =  0.987 atm

n = PV/RT = (0.987 atm)   x           (20 L)     = 0.88 moles

                    (0,082 Latm/(K mol)x 273 K

0.88 moles x [tex]6.22 x 10^{23}[/tex] molecules = 5.48 x 10´23 atoms

Answer:

Precise

Explanation:

hope it helps!!!!!!!!

Answer:

solubility- the degree to which a material will dissolve in another substance

mixture- different materials placed together but keeping their own properties

solution- a mixture in which substances are spread out evenly and will not settle

The salts which are more soluble in acidic solution than in pure water are Al(OH)₃, BaF₂, PbCl₂ and Hg₂Br₂.

Those compounds which are basic in nature will easily dissolve in the acidic solution as compare to the pure water.

Hence Al(OH)₃, BaF₂, PbCl₂ and Hg₂Br₂ will soluble in acidic solution.

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Answer:

carbon monoxide

Explanation:

yes this is the answer

Carbon mono-oxide is the gas which dissolve in ammonia copper(ii) chloride but insoluble in water.

Carbon monoxide (CO) is just a toxic gas that is colorless and odorless. It is created when various fuels, such as coal, wood, charcoal, oil, kerosene, propane, as well as natural gas, are burned incompletely.

What is gas?

One of the four basic states of matter is gas. Individual atoms, elemental molecules created from one type of atom can make up a pure gas.

Therefore, carbon mono-oxide is the gas which dissolve in ammonia copper(ii) chloride but insoluble in water.

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Answer:

the right answer is option A

Answer:

a.the central o atom oo

Explanation:

wala lang

Explanation:

Coal is formed when dead plantand animals matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

Answer:

the answer of this question is 0.0041M

Answer:

The elements boron, silicon, germanium, arsenic, antimony, and tellurium separate the metals from the nonmetals in the periodic table. These elements, called metalloids or sometimes semimetals, exhibit properties characteristic of both metals and nonmetals.

Elements: Oxygen

Answer:

the carbohydrates in cotton are mainly cellulose, but our body does not possess the proper enzymes to process cellulose, no we don't eat cotton on in our daily diet.

Answer:

Each of these organelles performs a specific function critical to the cell's survival. For example, biochemical reactions in a cell's mitochondria transfer energy from fatty acids and pyruvate molecules into an energy-rich molecule called adenosine triphosphate (ATP).

Explanation:

Answer:

D

Explanation:

hi

good morning

I hope right answer

I need 0.1g of protein

HOW TO CALCULATE NUMBER OF MOLES?

no of moles (n) = Molarity (M) × Volume (V)

In this question, 100 ml of a 20 uM solution of a protein was given.

Since 1uM = 10^-6M

20uM = 20 × 10-⁶

= 2 × 10-⁵M

1L = 1000ml

100mL = 100/1000

= 0.1L

no of moles = 2 × 10-⁵M × 0.1L

no of moles = 2 × 10-⁶mol

HOW TO CALCULATE MASS:

Mass = moles × Molar mass

Molecular mass of protein = 50,000g/mol

Mass = 2 × 10-⁶mol × 50000g/mol

Mass = 0.1g

Therefore, 0.1gram of protein is needed

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Molarity of a solution is simply defined as the mole of solute per unit litre of water.

Mathematically, it is expressed as:

[tex]Molaity = \frac{Mole }{Volume }[/tex]

With the above information in mind, we can determine the amount of the protein needed as follow:

Data obtained from the question

Volume = 100 mL

Molarity = 20 μM = 20×10¯⁶ M

Molecular weight of protein = 50000 g/mol

Conversion of 100 mL to litre (L).

1000 mL = 1 L

Therefore,

[tex]100 mL = \frac{100 mL * 1 L}{100 mL }\\\\100 mL = 0.1 L[/tex]

Determination of the mole of the protein

Volume = 0.1 L

Molarity = 20×10¯⁶ M

Mole = Molarity × Volume

Mole of protein = 20×10¯⁶ × 0.1

Determination of the mass of the protein

Mole of protein = 2×10¯⁶ mole

Molecular weight of protein = 50000 g/mol

Mass = mole × molar mass

Mass of protein =  2×10¯⁶ × 50000

Therefore, the amount of the protein needed is 0.1 g

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To solve such this we must know the concept of acid-base reaction. Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

NH[tex]_3[/tex] is an example of a Lewis Base that will react extensively with BF[tex]_3[/tex] to form the compound NH[tex]_3[/tex] + BF[tex]_3[/tex] → [B (NH[tex]_3[/tex])F[tex]_3[/tex]].

Therefore, NH[tex]_3[/tex] is the compound that will react to the greatest extent with boron trifluoride (BF[tex]_3[/tex]) in a Lewis acid-base reaction.

Learn more about the chemical reactions, here:

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Answer:

4x+8x=30

12x=300

x=300/12

x=25

Answer:

HOPE THIS ANSWER WILL HELP YOU

Answer: volume = 2856

Mass = 6.410496 × 10-5 m3 kg

Explanation:

Answer:

A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.

Answer:

100 Celsius

Explanation:

(I'm not sure if this is right but I'm confident this is the answer)

Because there are 2 Cl on the left, we will put a coefficient 2in front of HCl on the right side to balance out the Cl. This would result in an unequal amount of H, with 6 on the right side and 7 in the left, so we have to put a coefficient of 2 in front of C6H5OH and C6H4OH on both sides to balance out the H. By doing this, we would obtain an equal amount of H on both sides. The Carbon is already balanced, and so is the Oxygen.

The balanced chemical reaction equation for the reaction between aromatic phenol and chlorine gas in the presence of FeCl3 as catalyst is as follows;

C6H6O + Cl2 -------> C6H5OCl + HCl

An aromatic compound has 4n + 2 number of pi electrons. This condition is satisfied by phenol. Hence, phenol has the stability associated with aromatic compounds.

The reaction of phenol with chlorine in the presence of a catalyst such as FeCl3 is an aromatic electrophillic substitution reaction.

This reaction yields a chlorinated phenol (one of the aromatic hydrogen atoms attached directly to a C atom is replaced with a chlorine  atom and chlorophenol is formed).

A balanced chemical reaction equation is one in which the number of atoms of each element at the reactant side and the product side are equal. This condition is satisfied for the reaction;

C6H6O + Cl2 -------> C6H5OCl + HCl

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