CHEMISTRY HIGH SCHOOL

Which answer best explains why scientific models will continue to improve?Weather events will continue to become more deadly
Scientists continue to find new information and better technology.
Society is dissatisfied with the current weather models
Funding for research will continue to be available

Answers

Answer 1
Answer: option b. Scientists continue to find new information and better technology.

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How many moles are there in 77.1 g of cl2?

Answers

According to the mole concept, there are 1.8074 moles in 77.1 g of chlorine.

What is a mole?

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Number of moles is calculated as, mass/molar mass

Substituting values in formula gives, number of moles=77.1/70.90=1.8074

Thus, there are 1.8074 moles in 77.1 g of Cl₂.

Learn more about mole,here:

brainly.com/question/26416088

#SPJ2
There are 70.90g of Cl2 in 1 mol (because 35.45g Cl in one mol). So 77.1g/70.9g≈1.0874 mol.

Consider the following 1.0 mol L–1solutions. Which one of the following lists the
solutions in decreasing order (that is, strongest to weakest) of electrolyte strength?

(a) sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar)
(b) sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate
(c) sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar)
(d) sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)

Answers

(a) sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar) 
(b) sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate 
(c) sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar) 
(d) sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)

Which is a characteristic of a nonelectrolyte?A. It does not dissociate or ionize in water.
B. It partially dissociates or ionizes in water.
C. It conducts electricity poorly.
D. It conducts electricity extremely well.

Answers

Answer: Option (A) is the correct answer.

Explanation:

Non-electrolytes are the substances which do not dissociate into a solution or water to form ions.

Since, non-electrolytes do not dissociate into ions. Hence, they do conduct electricity.

Thus, we can conclude that it does not dissociate or ionize in water is a characteristic of a non-electrolyte.

Non-electrolytes are neither partially ionizable nor do they conduct electricity poorly. Therefore, out of the given options, only option (A) is the correct answer.

It is A on edge test

Which crime has the highest association with alcohol use?robbery

manslaughter

murder

assult

Answers


An article I just read said and I quote " a significant proportion of offenders and victims of sexual assault have consumed alcohol and alcohol increases the risk of sexual assualt, as victims become less able to detect dangerous situations. SO I would say the answer to you problem would be assault is sexual assualt is included in the answer.

Answer:

assault

Explanassaultation:

Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions. Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell. How are the electrons transferred between these atoms?

Answers

Magnesiumchloride is formed when a magnesium atom donates one electron each to two chlorine atomsto form magnesium ions and chloride ions.

What are ionic compounds?

Ionic compounds are compounds which are formed between oppositely charged ions.

The negatively-charged ions are formed by electron gain from the positively-charged ions.

In the magnesium chloride salt, a magnesium atom donates one electron each to two chlorine atoms.

The ions are held together by strong electrostatic forces of attraction to form the ionic compound.

Learn more about ionic compounds at: brainly.com/question/15724954

Answer:

The magnesium atom loses 2 electron to the 2 atoms of chlorine. The 7 valency electrons of each chlorine atom will now be 8 to attain stable configuration. The final compound is written as MgCl2.

Explanation:

Ionic compounds are compound formed from the transfer of electron(s). One atom of the element loses electron(s) while the other atom gains electron(s).

The compound Magnesium chloride is an ionic compound . The bond between an atom of magnesium and 2 atoms of chlorine is an ionic bonding.

The valency electron of magnesium is 2 electron , for the atom of magnesium to  attain octet rule, it will easily lose it 2 electrons to the chlorine atoms.

The chlorine atom on the other hand has 7 valency electrons, to attain octet configuration it will most likely gain 1 electron to become stable.

The magnesium atom loses 2 electron to the 2 atoms of chlorine. The 7 valency electrons of each chlorine atom will now be 8 to attain stable configuration. The final compound is written as MgCl2.

A student determines that according to the reaction N2(g) + 3H2(g) --> 2NH3(g), if 34g of nitrogen gas is reacted with excess hydrogen, 41g of ammonia can be produced. When the actual reaction was complete, only 38g of ammonia formed. Determine the percent yield for the reaction.

Answers

Answer:

The percent yield of this reaction is 92.7 %

Explanation:

Step 1: Data given

Mass of nitrogen gas (N2) = 34.0 grams

Mass of ammonia (NH3 produced = 41.0 grams

Molar mass of N2 = 28.0 g/mol

Molar mass of NH3 = 17.02 g/mol

Actual yield of ammonia = 38 grams

Step 2: The balanced equation

N2(g) + 3H2(g) → 2NH3(g)

Step 3: Calculate moles

Moles = mass / molar mass

Moles N2 = 34.0 grams / 28.0 g/mol

Moles N2 = 1.214 moles

Step 4: Calculate moles NH3

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

For 1.214 moles N2 we'll have 2* 1.214 = 2.428 moles NH3

Step 5: Calculate mass NH3

Mass NH3 = moles * molar mass

Mass NH3 = 2.428 moles * 17.02 g/mol

Mass NH3 = 41 grams

Step 6: Calculate percent yield for the reaction

Percent yield = (actuald yield / theoretical yield) * 100 %

Percent yield = (38 grams / 41 grams ) * 100 %

Percent yield = 92.7 %

The percent yield of this reaction is 92.7 %

Answer:

Y=92\%

Explanation:

Hello,

In this case, by considering the given chemical reaction, with given mass of nitrogen, one could compute the theoretical yield of ammonia as shown below and considering their 1 to 2 molar relationship in the chemical reaction:

m_(NH_3)^(theoretical)=34gN_2*(1molN_2)/(28gN_2)*(2molNH_3)/(1molN_2)*(17gNH_3)/(1molNH_3) \nm_(NH_3)^(theoretical)=41.3gNH_3

In such a way, the percent yield is obtained as shown below:

Y=(m_(NH_3)^(actual))/(m_(NH_3)^(theoretical)) *100\%=(38g)/(41.3g) *100\%\n\nY=92.0\%

Best regards.
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