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Alborosie
4 years ago
10

J.C. wants to determine if there is a relationship between room color and sleep. Based on his research, J.C. makes an educated g

uess that people fall asleep more quickly in a room painted blue than in a room painted yellow. He asks several people which color they like better, yellow or blue, and uses their responses to see if his educated guess was correct. What is missing from J.C.’s scientific investigation?
Chemistry
1 answer:
Westkost [7]4 years ago
7 0
<span>an experiment that directly tests the hypothesis research on the topic to see what others have learned a hypothesis that is based on research and that can be tested an analysis of the responses from all of the test subjects</span>
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Can anybody help??
kvv77 [185]

The amount of heat energy added to silver to heat it from 25°C to 100°C is :

8737.5 J

<u>Given data: </u>

mass of silver ( m ) = 500 g

T1 = 25°C

T2 = 100°C

s ( specific heat of silver ) = 0.233 J/g.c

<h3 /><h3>Determine the amount of heat required </h3>

Applying the formula below for heat ( Q )

Q = ms * ΔT

   = 500 * 0.233 * ( 100 - 25 )

   = 8737.5 J

Hence we can conclude that the The amount of heat energy added to silver to heat it from 25°C to 100°C is :  8737.5 J.

Learn more about heat energy : brainly.com/question/13439286

5 0
3 years ago
Calculate the following quantity: volume of 1.403 M copper(II) nitrate that must be diluted with water to prepare 575.2 mL of a
Juliette [100K]

Answer:

328 ml

Explanation:

We have given final volume =575.2 ml=0.575 L

Final concentration = 0.8012 M

We know that moles of copper(II) nitrate = final volume ×final concentration =0.8012×.0575=0.4606 moles

We have to find initial volume

So initial volume =\frac{moles\ of \ copper(II)\ nitrate}{initial\ concentration}=\frac{0.4606}{1.403}=0.328L=328ml

6 0
4 years ago
Currently this lab is run qualitatively asking only for whether a solution is acidic, neutral, or basic. If quantitative informa
crimeas [40]

Answer:

The only PH range which is not covered by any of the given components of the universal indicator is 7.6-8.0

Hence the PH range 7.6-8 can't be described using universal indicator.

8 0
3 years ago
Infer that if all atoms contain the same subatomic particles, what makes the atoms of different elements different?
lbvjy [14]
They aren’t the same atoms.
6 0
3 years ago
Read 2 more answers
What is C2H8 ? please hurry<br> (CH4=methane)<br> (C2H2=acetylene)
JulijaS [17]

Answer:

Carbon carbon | C2H8 - PubChem.

Explanation:

Brainliest plz :)

6 0
3 years ago
Read 2 more answers
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