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Answers by Spirit

Answers by Spirit
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The molar heat of fusion of iron(II) sulfide (FeS) is 20.9 kJ/mol. What mass of melted FeS at its melting point must solidify to release 150.0 kJ of energy? Round to the nearest whole gram.
answered Feb 23, 2019
6 votes
187k views
As proved by the transatlantic flights of Lindbergh and Earhart, postwar airplanes were engineered to fly A. for greater distances B. with heavier loads C. at lower altitudes D. at higher altitudes
answered Sep 10, 2018
2 votes
117k views
If a student scored 92 on a test where the mean score was 78.4 and the standard deviation was 4.3 the student z score is?
answered Aug 28, 2018
2 votes
17.5k views
EXPLAIN PLEAAASE ( theres a pic) :))))
answered May 5, 2018
2 votes
216k views
Use the quadratic formula to identify the x-value of the vertex of the equation y=(x-4)(x+2)
answered Mar 15, 2018
4 votes
223k views
PLEASE NEED HELP REALLY EASY Identify the class of the italicized pronoun(s) in the sentence. Galileo challenged the geocentric model of the solar system, and[ this} led to his persecution by the medieval
answered Jan 20, 2018
4 votes
153k views
The "prime time" for auditory and visual development is around what age? 3 to 4 months 1 to 2 years 4 to 5 years 7 to 10 years
answered Oct 16, 2017
5 votes
85.6k views
Which is the cause for how a species changes over time? A. mutations B. centromere C. RNA replication D. gametes
answered Apr 10, 2016
5 votes
228k views
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