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Anastaziya [24]
3 years ago
11

Matthew records the temperature outside for one day. From 10:00 a.m. to 12:00 p.m., the

Chemistry
1 answer:
ratelena [41]3 years ago
7 0

Answer:

The temperature will drop 4°C.

Explanation:

Note that this question is describing temperature change in response to the time of the day. Ideally, mornings to afternoons are usually hotter while evenings are colder.

According to this question, the temperature rises by 4°C from 10:00 a.m. to 12:00 p.m. it also rises another 3°C from 2:00 p.m. to 4:00 p.m but starts dropping by 2°C from 2:00pm to 4:00pm. This shows that between the hours of 10:00am - 2:00pm, the temperature increases as a result of the heat from sun. However, towards the evening period, the temperature reduces because the sun is getting shadowed by the moon.

Hence, based on this analogy, the most reasonable prediction about how the temperature will change from. 4:00am to 6:00am is that The temperature will drop 4°C.

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Which of the following is a galvanic cell?
sladkih [1.3K]

C. Aluminum (Al) oxidized, zinc (Zn) reduced

<h3>Further explanation</h3>

Given

Metals that undergo oxidation and reduction

Required

A galvanic cell

Solution

The condition for voltaic cells is that they can react spontaneously, indicated by a positive cell potential.

\large {\boxed {\bold {E ^ ocell = E ^ ocatode -E ^ oanode}}}

or:  

E ° cell = E ° reduction-E ° oxidation  

For the reaction to occur spontaneously (so that it E cell is positive), the  E° anode must be less than the E°cathode

If we look at the voltaic series:

<em>Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au </em>

The standard potential value(E°) from left to right in the voltaic series will be greater, so that the metal undergoing an oxidation reaction (acting as an anode) must be located to the left of the reduced metal (as a cathode)

<em />

From the available answer choices, oxidized Al (anode) and reduced Zn (cathode) are voltaic/galvanic cells.

7 0
3 years ago
Read 2 more answers
Which statement best describes the building?
Kamila [148]

Answer:

the answer is A

Explanation:

because abiotic things are non-living things

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Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
IceJOKER [234]
2HgO=2Hg + O2
433,18 g. = 32 g
x. = 250 g
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4 0
3 years ago
What is the percent of O in<br> CO2?
katen-ka-za [31]

Answer:

72.7% of oxygen

Explanation:

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2 years ago
Explain how you were able to use your knowledge of how different types of blood react with anti A, anti B, and anti Rh antibodie
dybincka [34]

Depending upon the clumping reaction with anti A , anti B and anti Rh antibodies the blood types are determined.

Explanation:

Agglutination (clumping) will occur when blood that contains the particular antigen is mixed with the particular antibody.

A+ have Agglutination with Anti-A ,Anti-Rh and No agglutination with Anti-B.

A- have Agglutination with Anti-A and No agglutination with Anti-B and Anti-Rh.

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B- have Agglutination with Anti-B and No agglutination with Anti-B and Anti-Rh.

Rh+ have Agglutination with Anti-A and Anti-Rh and No agglutination with Anti-B.

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