cumulative CHEM TEST Questions and
Correct Answercumulative CHEM TEST Questions and
Correct Answercumulative CHEM TEST Questions and
Correct Answercumulative CHEM TEST Questions and
Correct Answercumulative CHEM TEST Questions and
Correct Answercumulative CHEM TEST Questions and
Correct...
Elscores: Tuesday, 20 August 2024
cumulative CHEM TEST Questions and
Correct Answer
What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?Use .
12.04%
48.83%
51.17%
86.98%
✓ :-- 48.83%
Which can be categorized as a use of plasma in technology?
taking pictures of solar flares
observing the aurora borealis
making fluorescent lights for houses
making telescopes to observe distant stars
✓ :-- making fluorescent lights for houses. This is the only reasonable answer for this
question. pictures use the digital transfer, observing is not technology, and
telescopes typically use lens!
The chemical equation below shows the combustion of methane (CH4).CH4 + 2O2 CO2 +
2H2OThe molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide
(CO2) is 44.01 g/mol. What mass of CO2, in grams, will form when 8.94 g O2 completely
react?
3.25
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
6.15
13.0
53.0
✓ :-- 6.15
What is the true ratio of atoms in a molecule or formula unit called?
the molecular formula
the molar mass
the percent composition
the empirical formula
✓ :-- the molecular formula
Consider the heating curve.In which region are most particles moving the fastest?
2
3
4
5
✓ :-- 5
Which diagram shows electrons violating the Pauli exclusion principle?
✓ :-- c
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, Elscores: Tuesday, 20 August 2024
An entire group of elements was unknown when the periodic table was first developed
because they were unreactive and no known compounds were composed of them.
What most likely led to the inclusion of these elements in the periodic table?
the formation of a compound in the laboratory
new technology that showed how to identify one of the elements
improvements in instruments to measure small masses
more careful experiments to create synthetic elements
✓ :-- new technology that showed how to identify one of the elements
What is the element Ar classified as in the periodic table?
a noble gas
a halogen
a metalloid
a metal
✓ :-- noble gas
Rebekah finds that a solution of sugar in water has a volume of 1.32 fl. oz. How should she
report this amount using the metric system? (1 fl. oz. = 29.6 mL)
0.403 m
1.40 qt
37.5 g
DO NOT COPY AND PASTE!!
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