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allochka39001 [22]
2 years ago
12

Hey chemist tests new measures for paint samples and decides to one mixture stickiness makes it worthless. A scientist working i

n a nearby lab suggests a different used for the sticky mixture. Which statement best describes this situation?
A. combining different types of scientists comments always leads to new discoveries
B. only scientists who are directly involved in investigation should comment on the results
C. other scientists comment made during an investigation can be a useful source of new ideas
D. too many comments made by scientists about the work of others can interfere with progress
Chemistry
1 answer:
sergeinik [125]2 years ago
6 0

Answer: C. other scientists' comments made during an investigation can be a useful source of new ideas

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I have a brick, dimensions 4 cm tall, 9 cm wide, and 25 cm long, with a mass of 1250 g. What is the density?
Likurg_2 [28]

Answer:

1.389

Explanation:

P = m / V

m = 1250

V = 4x9x25 = 900

1250/900 = 1.388889

7 0
3 years ago
Calculate the mass in micrograms of zinc oxalate the chemist has added to the flask. be sure your answer has the correct number
Vera_Pavlovna [14]
<span>A chemist adds 155.0ml of a 4.10 X 10^-5 mmol/L of a zinc oxalate (ZnC2O4)solution to a reaction flask. Calculate the mass in micrograms of zinc oxalate the chemist has added to the flask. 1mmol = 10^-3 mol Therefore 4.10*10^-5mmol = 4.10*10^-8mol molar mass ZnC2O4 = 65.39+(2*12.011)+(4*15.99) = 153.372g/mol You have 4.10*10^-8 mol/litre =153.372 * 4.10*10^-8 = 6.29*10^-6 grams / litre (* see below) But you have 155ml. Mass of ZnC2O4 = 155/1000*6.29*10^-6 g Mass is = 9.75*10^-7 grams 1µg = 10^-6 g You then have 9.75*10^-7/10^-6 = 0.975µg ZnC2O4 (*see below) at this point you could have said: 1µg = 10^-6 g therefore you have a solution of 6.29µg per litre, 155ml = 6.29*155/1000 = 0.975µg ZnC2O4</span>
3 0
3 years ago
What is 2KNO3 + 1H2CO3 = 1K2CO3+2HNO3 reaction type
Tema [17]
DR is the correct answer

hope this helps
4 0
3 years ago
Determine which physical conditions are necessary to support nuclear fusion and formation of stars.
Ilia_Sergeevich [38]

Answer:

Promotes Stellar Formation:

-Increased Gravitational Attraction

-Higher Temperature

Does Not Promote Stellar Formation:

-Decreased Gravitational Attraction

-Lower Temperature

Explanation:

Stars need at least three million kelvins to form, and the gravitational attraction helps form the star in the first place.

5 0
3 years ago
PLEASE TELL ME IF THIS IS RIGHT CLASS IN % MINUTES
alexdok [17]

Answer:

I think that is pretty good and if you get it wrong you showed your work so your teacher can see you're thinking. That is defenetly gonna get you a score.

Explanation:

7 0
3 years ago
Read 2 more answers
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