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Tamiku [17]
3 years ago
14

1. What is something you might see a scientist doing?

Chemistry
2 answers:
Diano4ka-milaya [45]3 years ago
8 0
Observation is one of the 9 steps of scientific method.
n200080 [17]3 years ago
3 0
Something I might see a scientist doing include recording quantitative data
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(a) The absorbance of mixture at 400 nm was 0.40.
laiz [17]

Answer:

0.1 g/dl

Explanation:

The standard curve is a graph that relates the absorbance at 400 nm with the concentration of haemoglobin in mg/dl. To obtain the concentration from the absorbance value, we enter in the x-axis (absorbance at 400 nm) with the value 0.40 (the line between 0.2 and 0.6), we extrapolate the line to the curve and read the correspondent value on y-axis (concentration in mg/dl): 100 mg/dl.

So, we convert the concentration from mg/dl to g/dl by dividing into 1000:

100 mg/dl x 1 g/1000 mg = 0.1 g/dl

Therefore, the concentration of haemoglobin of the patient is 0.1 g/dl.

6 0
3 years ago
Question 7
Svet_ta [14]

Answer:

Check if the ions of two compounds exchange places.

Explanation:

The definition of single replacement is a reaction when an ion replaces another ion, thus the name.

7 0
3 years ago
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Which is larger CA or CA2+ and why?
Vika [28.1K]
Ca because it has a larger atomic radius.
3 0
3 years ago
Porcentaje en masa formula y unidad<br><br>​
elena-14-01-66 [18.8K]

Explanation:

Expresa los gramos de soluto por cada 100 gramos de disolución. Porcentaje masa = masa de soluto___ x 100 masa de la disolución Cuando trabajamos con la masa, podemos sumar el soluto y el disolvente para obtener la disolución.

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Color , texture , and odor are all _______ of matter .
frosja888 [35]
Property of matter, I think.
7 0
3 years ago
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