A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?

Answers

Answer 1

Answer: It would be chemical energy?

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No so that 01) In how many different ways can we arrange letten of the word HEURISTICS. C'must always occur at the third place?

Answers

Answer:

Given the word is '' HEURISTICS '' the Total no of letters is 10 Since C mus

Explanation:

How many moles of sulfate ions (SO42−) are present in 1.5 mol of Al2(SO4)3?

Answers

Answer:4.5 moles of sulfate ions are present in 1.5 moles of $Al_2(SO_4)_3$ .

Explanation:

$Al_2(SO_4)_3\rightarrow 2Al^(3+)+3SO_(4)^(2-)$

1 mol of $Al_2(SO_4)_3$ gives 3 moles of sulfate ions.

Moles of sulfate ion in 1.5 moles : $1.5* 3=4.5 moles$

4.5 moles of sulfate ions are present in 1.5 moles of $Al_2(SO_4)_3$ .

Moles are the fraction of the chemical unit of the atoms, molecules, etc. The moles of sulfate ion present in 1.5 moles of aluminum sulfate is 4.5 moles.

What are moles?

Moles are the ratio of the mass of the substance to that of the molar mass of the substance. Moles are given in mol.

The reaction can be shown as:

$\rm Al_(2)(SO_(4))_(3) \rightarrow 2Al^(3+) + 3SO_(4)^(2-)$

From the reaction, it can be concluded that 1 mole of aluminum sulfate will give 3 moles of sulfate ions.

The moles of sulfate ions in 1.5 moles of aluminum sulfate will be, $1.5 * 3 = 4.5 \;\rm moles.$

Therefore, 4.5 moles of sulfate ions are present in aluminum sulfate.

Learn more about moles here:

brainly.com/question/10782582

Which of the following circumstances will result in a reaction that is spontaneous only at low temperatures?A.) positive enthalpy change and positive entropy change
B.) negative enthalpy change and negative entropy change
C.) positive enthalpy change and negative entropy change
D.) negative enthalpy change and positive entropy change

Answers

Answer: B.) negative enthalpy change and negative entropy change

Explanation:

According to Gibb's equation:

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibbs free energy

$\Delta H$ = enthalpy change

$\Delta S$ = entropy change

T = temperature in Kelvin

$\Delta G$ = +ve, reaction is non spontaneous

$\Delta G$ = -ve, reaction is spontaneous

$\Delta G$ = 0, reaction is in equilibrium

Thus when $\Delta H$ = -ve

$\Delta S$ = -ve

$\Delta G=(-ve)-T(-ve)$

$\Delta G=(-ve)(+ve)=-ve$ only at low temperature

Reaction is spontaneous only if temperature is low.

D) negative enthalpy and positive entropy,
since the formula G=H-TS when a reaction is spontaneous then G must be negative, and if values of t are low then the only time it is guaranteed to be a negative G value is if H is positive and S is negative

which of the following is not a mixture? a)antibiotic b)evaporated milk c)brewed coffee d)hydrogen chloride

Answers

Answer:

d) Hydrogen chloride

Explanation:

Hydrogen chloride (HCl) is not a mixture. It is a chemical compound composed of two elements, hydrogen (H) and chlorine (Cl), combined in a fixed ratio. In contrast, the other options (antibiotic, evaporated milk, brewed coffee) all involve mixtures:

Antibiotics are typically mixtures of various chemical compounds used for medicinal purposes.

Evaporated milk is a mixture of milk and water with the water removed.

Brewed coffee is a mixture of water and coffee grounds, often with other components like sugar or cream added.

Hydrogen chloride, on the other hand, is a pure compound with a defined chemical formula (HCl) and consistent composition.

Compounds have similar properties to the elements of which they are made.For example, FeS is magnetic and smelly, since iron (Fe) and sulfur (S) are attracted to a magnet, and possess an odor of eggs,
respectively

True
False

Answers

Answer:

false

Explanation:

The properties of compounds are often very different from the properties of the elements that make them. For example, water is made from two atoms of hydrogen bonded to one atom of oxygen. ... The elements calcium and chlorine combine to form the compound calcium chloride. Calcium is a soft, silvery metallic solid.

Answer:

the answer is False

Explanation:

False

Hope this helps

Define the law of conservation of charge and provide an example.Define opposite charges attract and like charges repel and provide an example.

Define Electricity along with an example.

Answers

Answer:

Conservation of Charge is the principle that the total electric charge in an isolated system never changes. The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved.

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