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DerKrebs [107]
2 years ago
10

What is the sum of 16+ -20?

Chemistry
2 answers:
mr Goodwill [35]2 years ago
6 0

Answer:

-4

Explanation:

PLz give me brainliest I worked hard thank u

MaRussiya [10]2 years ago
5 0

answer:

-4

hope this helps

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Help me with this question!!
skelet666 [1.2K]
Nitrogen is ...19.7
flourine is 80.3...
hope this helps!
8 0
3 years ago
To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance.
kap26 [50]

To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.

In spectrophotometry, to plot the calibration curve, you need to prepare solutions with known concentrations and measure their absorbance.

We have a standard iron solution with a concentration of 0.2500g/L of pure iron (C₁). We pipet 25.00mL (V₁) of this standard iron solution into a 500mL (V₂) volumetric flask and dilute up to the mark with distilled water.

We can calculate the concentration of the diluted solution (C₂) using the dilution rule.

C_1 \times V_1 = C_2 \times V_2\\\\C_2 = \frac{C_1 \times V_1}{V_2}  = \frac{0.2500 g/L \times 25.00 mL}{500 mL} = 0.0125 g/L

Then, if we wanted to prepare the blank, that is, the solution that contains the same matrix but not the analyte, and whose concentration in iron is 0.00 mg/L, we wouldn't pipet any of the diluted solution.

To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.

Learn  more: brainly.com/question/24195565

8 0
2 years ago
Which atom attracts electrons most strongly when bonded? oxygen (O) magnesium (Mg)
Vadim26 [7]
Oxygen because it is on the left of the periodic table so it has a strong pull.
8 0
3 years ago
Read 2 more answers
What would happen if there no decomposers
AleksAgata [21]
Producers would not have enough nutrients .
3 0
3 years ago
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Write the empirical formula for at least four ionic compounds ca2+.v5+,f-,s2
Vesna [10]
Using these Elements. Here would be the 4 ionic compounds.

CaF2
VF5
CaS
V2S5
8 0
3 years ago
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