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Lelechka [254]
3 years ago
10

A scientist compares two samples of colorless gas present at the beginning and end of a lab process. She wants to determine whet

her a chemical reaction has occurred. She tests whether each gas is flammable. Neither has burns when lit. She then measures the amount of gas. Sample one has a volume on 53 cubic cm and a mass of 0.10g. Sample two has a volume of 39 cubic cm and a pass of 0.05g. What are the scientist's findings?
Physics
2 answers:
kompoz [17]3 years ago
8 0

Joseph Priestley was born in Yorkshire, the eldest son of a maker of wool cloth. His mother died after bearing six children in six years. Young Joseph was sent to live with his aunt, Sarah Priestley Keighley, until the age of 19. She often entertained Presbyterian clergy at her home, and Joseph gradually came to prefer their doctrines to the grimmer Calvinism of his father. Before long, he was encouraged to study for the ministry. And study, as it turned out, was something Joseph Priestley did very well.

Aside from what he learned in the local schools, he taught himself Latin, Greek, French, Italian, German and a smattering of Middle Eastern languages, along with mathematics and philosophy. This preparation would have been ideal for study at Oxford or Cambridge, but as a Dissenter (someone who was not a member of the Church of England) Priestley was barred from England's great universities. So he enrolled at Daventry Academy, a celebrated school for Dissenters, and was exempted from a year of classes because of his achievements.

After graduation, he supported himself, as he would for the rest of his life, by teaching, tutoring and preaching. His first full-time teaching position was at the Dissenting Academy in Warrington. (Although obviously brilliant, original, outspoken and, by one report, of "a gay and airy disposition," Priestley had an unpleasant voice and a sort of stammer. That he made a living through lectures and sermons is further evidence of his extraordinary nature.)


 https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/josephpriestleyoxygen.html

melamori03 [73]3 years ago
8 0

Answer:Density calculations show that the gases are different, so a chemical reaction occurred.

Explanation: correct

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Answer:

5m/sec^2

Explanation:

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grigory [225]

Answer:

The box displacement after 6 seconds is 66 meters.

Explanation:

Let suppose that velocity given in statement represents the initial velocity of the box and, likewise, the box accelerates at constant rate. Then, the displacement of the object (\Delta s), in meters, can be determined by the following expression:

\Delta s = v_{o}\cdot t+\frac{1}{2}\cdot a\cdot t^{2} (1)

Where:

v_{o} - Initial velocity, in meters per second.

t - Time, in seconds.

a - Acceleration, in meters per square second.

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5 0
3 years ago
"What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.9 m and an e
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Answer:

The Magnifying power of a telescope is M = 109.26

Explanation:

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focal length of objective f_{objective} = \frac{R}{2}

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Magnifying power of a telescope is given by,

M = \frac{f_{objective} }{f_{eyepiece} }

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