If 3.0g of H20 actually forms what is the percentage yield

Answers

Answer 1

Answer: Percent yield is expressed as the ratio of the actual yield and the theoretical yield of the reaction multiplied by 100 to get the percent value. The actual yield is usually given in a problem. The theoretical yield is calculated from the reaction. For this problem, it cannot be solved since we cannot obtain the theoretical yield.

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What is true of all mixtures?Group of answer choices

All mixtures are made up of 2 or more elements or compounds.

All mixtures are made up of solutions

All mixtures are made up of compounds.

All mixtures are made up of elements.

Answers

All mixtures are made up of two or more elements or compounds.

What are compounds?

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Answer:

Answer the first ine made up of 2 or more.....

Why would you add boiling chips/stones to a solution that is to be refluxed? when should you add them?

Answers

Chip stones should be added to a solution that is to be refluxed as they act as nucleation sites for formation of solvent bubbles.

This should be added when the temperature of the liquid is still low.

What are Boiling Chips?

These are usually added to a solution as they contain trappedair which

helps in the reflux process.

The high surface area ensures it acts as nucleation sites and the best time

to dd is when the temperature of the solution is still low for best results.

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Answer: Boiling chips provide surfaces on which bubbles can form as the liquid boils.

Hope this helps!

Which of the following is a TRUE statement?a.
A molecule always has three types of elements present

b.
Compounds always include the elements hydrogen and sodium

c.
Compounds include things we use in our everyday lives

d.
All elements prefer to hang out with other elements and form molecules

Answers

The true statement among the following options is c. As the substances which we use are compounds.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.

Compounds include things we use in our everyday lives.Compounds are substances composed of two or more different elements chemically combined in a fixed ratio by weight. They are everywhere in our daily life, from food to electronics. For example, table salt is a compound that we use to enhance the flavor of our food.

Thus, the correct option is C.

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It is going to be B is B is it

List and describe two powerful forces of nature caused by plate tectonics

Answers

Earthquakes and Volcanoes. they are caused by them movung against or away from each other.

Volcanoes and tsunamis

Habitat ____________ splits ecosystems into pieces and makes populations more vulnerable to disturbances or climate change.A) diversification
B) extinction
C) fragmentation
D) unification

Answers

The correct answer is (C) fragmentation.

Habitat fragmentation is discontinuities in a organism's preferred ecosystem, causing disturbance in a population and ecosystem decay. Cause of fragmentation is geological processes and human activities like deforestation. Habitat loss, which occur through the process of habitat fragmentation, is considered a greatest to species and biodiversity.

fragmentation that is the answer

What is the pressure in atm exerted by 2.48 moles of a gas in a 250.0 ml container at 58c?

Answers

Explanation:

The given data is as follows.

V = 250.0 ml, T = 58^{o}C = 58 + 273 = 331 K

n = 2.48 moles, P = ? , R = 0.082 atm L /K mol

Therefore, calculate the pressure using ideal gas equation as follows.

PV = nRT

P = $(nRT)/(V)$

= $(2.48 mol * 0.082 atm L/K mol * 331 K)/(250.0 ml)$

= 0.269 atm

Thus, we can conclude that pressure of the given gas is 0.269 atm.

T = 58 + 273.15 = 331.15

R = 0.082 atm

V = 250.0 mL / 1000 = 0.25 L

P = n x R x T / V

P = 2.48 x 0.082 x 331.15 / 0.25

P = 67.342 / 0.25

P = 269.368 atm

hope this helps!

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A substance conducts an electric current when it is in the liquid state. What would the conductivity of the substance in solid form indicate about the type of bond in the substance?A.) If the solid is conductive, the bonds are ionic.B.) If the solid is not conductive, the bonds are covalent.C.) If the solid is conductive, the bonds are metallic.D.) If the solid is not conductive, the bonds are metallic.

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Which of the following statements is true about chemical reactions? endothermic reactions absorb heat and exothermic reactions give off heat exothermic reactions absorb heat and endothermic reactions give off heat endothermic and exothermic reactions absorb heat endothermic and exothermic reactions give off heat