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Arada [10]
3 years ago
6

PLZZZ HELPPPPPP

Chemistry
2 answers:
BabaBlast [244]3 years ago
8 0

Answer:

double displacement reaction

dezoksy [38]3 years ago
6 0

Answer:

double replacement

Explanation:

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HELPPPP ANSWERSS!!!<br><br> A. <br> 13<br><br> B. <br> 8<br><br> C. <br> 15<br><br> D. <br> 5
KATRIN_1 [288]

Answer:

C

Explnation:

D

4 0
3 years ago
A 453 g piece of glass at 25.7∘C is left outside on a sunny day. How much heat must the glass absorb from the sun in order to re
Tju [1.3M]

Answer:

Q = 5555.6J

Explanation:

Mass of glass piece, m = 453g

initial temperature = 25.7°C

temperature to be attained = 40.3°C

⇒change in temperature, Δt = 40.3 - 25.7 = 14.6°C

specific heat of glass, s = 0.840J/g°C

Heat absorbed, Q = msΔt

⇒Q = 453×0.840×14.6 = 5555.592J

⇒<u>Q = 5555.6J</u> (rounded to the nearest tenth)

7 0
3 years ago
If a cross-country runner covers a distance of 347 meters in 134 seconds what is her speed?
Vlad1618 [11]
Distance s=347 meters
time t=134 sec.
speed =s/t=347/134=2.5896 m/s nearly
5 0
3 years ago
The equation NaCl →Na +Cl is a ______ reaction.
hjlf
You are looking at a decomposition reaction because the original compound is being broken into its individual elements.<span />
8 0
3 years ago
Read 2 more answers
Select each process that shows a physical change. Select all that apply.
erica [24]

Answer:

Chopping wood logs

A pot of water o a grate over a burning fire

Explanation:

Physical change is easily reversible. Burning/combustion is a chemical process where substances react rapidly with oxygen: this is usually irreversible.

The marshmallow, roasted food and burned wood all undergo combustion and hence are tagged chemical changes.

Explanation:

5 0
2 years ago
Read 2 more answers
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