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3 years ago

During chemical reactions, energy is

Chemistry

2 answers:

slamgirl [31]3 years ago

7 0

Answer:

During chemical reactions, energy is used to break bonds in reactants

Explanation:

It is a process in which one or more substances, the reactants, are converted to one or more substances.

maria [59]3 years ago

6 0

All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed.

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Referring to the article, which of the following is associated with the use of genetic engineering to clone farm

malfutka [58]

D. All of the given statements are true in context of animal cloning.

Explanation:

Cloning is the method in which a similar genetic copy is produced.

Animal cloning is a complex process in which an organism of similar type is produced with same DNA to each other.

Mostly successfully cloned animals in live are cattle,sheep,goats...

Scientists have also cloned rats,mice,rabbits,horses...

This animal cloning is used for farming by the farmers which gives acceleration in their crop production.

Animal cloning have showed some adverse affects in sheep, and other mammal animals regarding issues in their organs like liver,heart,brain etc.

The success rate is very low like 10% in animal cloning due to many reasons such as surviving from birth to the cloned animals.

8 0

3 years ago

Read 2 more answers

In a test of an automobile engine 1.00 L of octane (702 g) is burned, but only 1.84 kg of carbon dioxide is produced. What is th

Reptile [31]

Answer:

The % yield of CO2 is 85.05 %

Explanation:

Step 1: Data given

Mass of octane = 702 grams

Molar mass octane = 114.23 g/mol

Mass CO2 =1.84 kg = 1840 grams

Molar mass of CO2

Step 2: The balanced equation

2C8H18 + 25O2 → 16CO2 + 18H2O

Step 3: Calculate moles of octane

Moles octane = mass octane / molar mass octane

Moles octane = 702.0 grams / 114.23 g/mol

Moles octane = 6.145 moles

Step 4: Calculate moles of CO2

For 2 moles octane we need 25 moles O2 to produce 16 moles CO2 and 18 moles H2O

For 6.145 moles octane we'll have 8*6.145 moles =49.16 moles

Step 5: Calculate mass of CO2

Mass CO2 = moles CO2 * molar mass CO2

Mass CO2 = 49.16 moles * 44.01 g/mol

Mass CO2 = 2163.5 grams

Step 6: Calculate % yield of carbon dioxide

% yield = (actual yield / theoretical yield)*100%

% yield = (1840/2163.5)*100%

% yield = 85.05 %

The % yield of CO2 is 85.05 %

4 0

3 years ago

Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th

Vlada [557]

Answer:

the mass required to inflate a 72 L bag is 191.491 g

Explanation:

reaction:

2 NaN3 ↔ 2 Na + 3 N2

conditions:

V = 72.0 L
STP: P = 1 atm ∧ T = 298 K

gas law:

PV = RTn
R = 0.082 atm * L / K * mol

⇒ n = PV / RT

⇒ n = ((1 atm) * ( 72.0 L)) / (0.082 atm*L / K*mol) * (298 K)

⇒ n = 2.946 mol

⇒ m = n * Mw = ( 2.946 mol ) * ( 64.99 g/mol)

⇒ m = 191.491 g

7 0

3 years ago

18 ) Liquid A and Liquid B are clear liquids. They are placed in open containers and allowed to evaporate. When evaporation is c

arsen [322]

Answer:

Liquid A is a homogeneous mixture and Liquid B is a heterogeneous mixture

Explanation:

5 0

3 years ago

How might an antioxidant prevent another element from gaining or losing an electron?

Maslowich

Answer:

An antioxidant helps in the mopping up and elimination of free radicals and a common example is Glutathione. Oxidation reactions Involves the transfer of electrons or addition of oxygen to a substance.

Antioxidants help in decreasing or prevention of the oxidation of the molecules due to free radicals being formed which causes damage in the cells of animals.

5 0

2 years ago