3 years ago

if you see a dark mass similar to a blown-up balloon at the top of a volcano, what type of feature are you most likely viewing

1 answer:

6 0

Conventional volcanoes are known to erupt after pressure builds up from new magma flowing into the magma chambers that lie below the vents on the Earth's surface.

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The celestial bodies in space move about in predictable paths called blank . As a result, a planet is able to blank around the S

rewona [7]

Answer:

Gravity

Explanation:

All matter exerts a force, which is called , that pulls all other matter towards its center. The strength of the force depends on the mass of the object: the Sun has more gravity than Earth, which in turn has more gravity than an apple. Also, the force weakens with distance. Objects far from the Sun won’t be influenced by its gravity.

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3 years ago

How does increasing pressure affect the rate of reaction between gases?

Elina [12.6K]

Answer:

B, increases rate of collisions

Explanation:

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2 years ago

What is the % yield of the reaction making 1.6 g of acetyl salicylic acid from 5.7 g of salicylic acid, 9.9 mL of acetic anhydri

artcher [175]

Answer:

Yield of reaction is 76.7%

Explanation:

The reaction of salicylic acid with acetic anhydride to produce acetyl salicylic acid is 1:1. That means 1 mole of salicylic acid reacts with 1 mole of acetic anhydride (Acid is catalyst of reaction).

Moles of salicylic acid are:

$5.7g\frac{1mol}{138.121g} = 0.04127 moles$

And moles of acetic anhydride are:

$9.9mL\frac{1.082g}{mL} \frac{1mol}{102.09g} = 0.105 moles$

As salicylic acid is limiting reactant, theoretical moles of acetyl salicylic acid are 0.04127mol. That means theoretical mass of acetyl salicylic acid is:

$0.04127moles\frac{180.158g}{1mol} = 7.435g$