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3 years ago

How is gravity an attractive force?

2 answers:

8 0

An attractive force that exists between all objects with mass Because mass is always positive. There are different notions of mass, but they're equivalent. ... The masses in Newton's law of gravitation, F=Gm1m2r2, are gravitational masses.

Helen [10]3 years ago

5 0

Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.

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1. Which metal is the most reactive? How do you know this?

Novosadov [1.4K]

Answer:

cesium

Explanation:

The most reactive metal on the periodic table is francium. However, francium is a man-made element and only minute quantities have been produced, so for all practical purposes, the most reactive metal is cesium. Cesium reacts explosively with water, though it is predicted francium would react even more vigorously.

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4 years ago

In what ratio will the iron iii ion and the oxide ion form an ionic compound

Mice21 [21]

The oxidation state of iron may be 2,3 or 6 and the most common is 3 & this is our case, Fe^3+ can react with Oxygen (O2), which have fixed oxidation state (2), to form Fe2O3.
Two ions of iron and 3 ions of Oxygen with 2:3 ratio.

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3 years ago

Bob just filled his car's gas tank with 20 gallons of gasohol, a mixture consisting of 5% ethanol and 95% gasoline. If his car r

Maksim231197 [3]

Answer:

Explanation: the antsier is A. 9/10

7 0

3 years ago

1) Aqueous aluminum sulfate reacts with aqueous potassium hydroxide to

Orlov [11]

bitly coin downloadExplanatibitly coin downloadon:

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3 years ago

If 21.4 g of aluminum is reacted with 91.3 g of iron (III) oxide, the products will be aluminum oxide and iron metal. What mass

horsena [70]

Answer:

The mass of iron produced is 44.29 grams

Explanation:

Al + FeO3 $\rightarrow$

Aluminium + Iron III oxide

2Al + F₂O₃ → Al₂O₃ + 2Fe

Molar mass of Al = 26.981539 g/mol

Molar mass of F₂O₃ = 159.69 g/mol

Number of moles of Aluminium = 21.4 g/26.981539 g/mol = 0.7931 moles

Number of moles of F₂O₃ = 91.3 g/159.69 g/mol = 0.572 moles

Hence, 1 mole of Al combines with 1/2 moles of F₂O₃, 0.7931 moles of Al will combine with 0.7931 × 1/2 or 0.3966 moles of F₂O₃ to produce 0.7931 moles of iron

Molar mass of iron = 55.845 g/mol

Therefore the mass of iron produced = Number of moles × Molar mass = 0.7931 × 55.845 = 44.29 grams.

5 0

3 years ago