"The mass of Substance C is five times the mass of Substance B", the given statement is correct.
Answer: Option D
<u>Explanation:</u>
As Jessie added 16 gm. of Substance A to 4 gm. of Substance B Obtained certain amount of Substance C which can be calculated as follows:
amount of Substance C = Substance A + Substance B = 16 + 4 = 20 gm
Therefore, 20 gram of Substance C was obtained. Here, fourth statement is correct which says the mass of Substance C ifs five times the mass of Substance B to justify this, see the below:

Answer:
There are 1,500 volcanoes in the world.
hopes this helps:)
Answer:
As Victorian imperial poetry, "The White Man's Burden" thematically corresponds to Kipling's belief that the British Empire was the Englishman's "Divine Burden to reign God's Empire on Earth"; and celebrates British colonialism as a mission of civilisation that eventually would benefit the colonised natives.
The statement is true that the state of Arizona can sue the state of California over Colorado river water to the United States Supreme Court and can hear the case for the first time. In fact there was a case that happened in 1982 and was decided on 1983.
The spread of slavery into the Louisiana Territory was limited.<span>
The US in the beginning was trying to balance the power between the Northern "Free" states (no slaves), and the Southern slave states. However, Missouri soon wanted to join the Union, as a pro-slavery state. This led to arguments on whether Missouri should be admitted or not. The Missouri promise allowed Missouri to join as a slave state into the Union, but, to balance the power, Maine was created to be a free state.
</span><span>The spread of slavery into the Louisiana Territory was limited.
Except for Missouri, all other states created within the Louisiana Territory was to be free states.
hope this helps</span>