Answer:
b. The final state of the substance is a gas.
d. The sample is initially a liquid. One or more phase changes will occur.
Explanation:
Methane has the following properties:
- Normal melting point: 90.7 K
- Normal boiling point: 111.65 K
*"Normal" refers to normal pressure (1 atm).
According to this, we can affirm:
- Below 90.7 K, methane is solid.
- Between 90.7 K and 111.65 K, methane is liquid.
- Above 111.65 K, methane is gas.
<em>A sample of methane at a pressure of 1.00 atm and a temperature of 93.1 K is heated at constant pressure to a temperature of 158 K. Which of the following are true? Choose all that apply.</em>
<em>a. The liquid initially present will solidify.</em> FALSE. The liquid will vaporize.
<em>b. The final state of the substance is a gas.</em> TRUE.
<em>c. The sample is initially a solid.</em> FALSE. The sample is initially a liquid.
<em>d. The sample is initially a liquid. One or more phase changes will occur. </em>TRUE.
Answer:
states that rock layers with the same unique groupings of fossils are of the same geologic age.
Explanation:
The principle of fossil correlation states that the presence of similar fossils of dead organisms in rock layers indicates that the organisms under investigation must have existed around the same geologic time. This principle can be used in dating the periods when the organism being studied lived.
The geological age system follows a chronological format in tracking the age of an item under study by grouping the time periods that organisms lived into strata.
A substance that readily burns
when it comes into contact with a flame has the chemical property of
reactivity. The answer is letter C. Reactivity is a chemical property of a
substance. According to EPA regulations, it is normally unstable and readily undergoes
violent change without detonating. it can explode or violently react when
exposed to water, when heated, or under STP.
Answer:
Y>Q>W>Z>X
Explanation:
Each more reactive element on the list replaces from a compound any of the elements below it (less reactive).
Q>W
Z>X
W>Z
Y>Q
Thus,
Y>Q>W>Z>X
Hey there mate ;)
<em>Question</em>: Write ionic equation
. HCl(aq) + KOH(aq) → KCl(aq) + H2O(l)
<em>A</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em>:</em><em>-</em>
The ionic equation is-
K+ + OH- + H+ + Cl- = H2O + K+ + Cl-
