3 years ago

Gold has a density of about 20g/mL. If I measured out 2mL of gold, I would expect it to have a mass of about ___ grams.

1 answer:

4 0

The answer is 40 grams. If gold is 20 grams per mL and you have 2 mLs, you get 40 grams of gold. Just add 20 + 20 or multiply 2 x 20 to get 40.

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He reaction produces 1.6 g of gas in 30 seconds.Calculate the mean rate of the reaction in the first 30 seconds.Use the equation

devlian [24]

Answer:

Mean rate of reaction produced = 0.533 g/sec (approx.)

Explanation:

Given:

Reaction produced = 1.6 gram

Time taken = 30 sec

Find:

Mean rate of reaction produced

Computation:

Mean rate of reaction produced = Reaction produced / Time taken

Mean rate of reaction produced = 1.6 / 30

Mean rate of reaction produced = 0.533 g/sec (approx.)

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3 years ago

The figure shows a group in the periodic table. What is the name of this group of elements? Group of answer choices metalloids h

miskamm [114]

Answer:

halogens

Explanation:

on a periodic table (just search ptable.com) right under the 17 in small words it says halogens

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3 years ago

Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.

tiny-mole [99]

Answer: A.

Explanation:

Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).

Weight= Mass

Height= Height

Hope this helps!

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3 years ago

What has mass and takes up space? A. matter B. weight C. volume D. space

spayn [35]

Answer:

Matter is anything that has mass and takes up space.

<h3>PLEASE MARK ME BRAINLIEST</h3>

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3 years ago

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Which substance in the reaction is considered to be the acid? A) HNO3 B) H2O C) NO3- D) H3O+

S_A_V [24]

Answer:

A (HNO3)

Explanation:

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3 years ago