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yanalaym [24]
2 years ago
12

Why did you test the reaction mixture with starch/iodide paper before starting the separatory funnel steps

Chemistry
1 answer:
-Dominant- [34]2 years ago
3 0

Answer:

This paper is impregnated with iodide ions and starch and will turn black if treated with an oxidizing agent (e.g. HOCl) which oxidizes the iodide ions

Explanation: hope this helps :)

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A student is observing different structures of a seed plant during a lab activity. She has identified tiny structures that look
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I’m not sure but I think it’s powder mildew
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3 years ago
Rebekah finds that a solution of sugar in water has a volume of 1. 32 fl. Oz. How should she report this amount using the metric
goldfiish [28.3K]

Rebekah reports the volume of sugar solution using metric system as 39.1 mL. Thus, option D is correct.

The metric system has been the measurement system introduced in 1790s. The system has mediated the units for the measurement of volume, mass, length.

The volume has been the space that has been occupied by matter. The volume can be denoted with SI unit L. However, the another accepted unit for volume has been mL.

Thus, the volume of sugar solution has been reported in mL.

The given sugar solution has volume of 1.32 fl. Oz

The volume in mL can be given as:

\rm 1\;fl\;Oz=29.6\;mL\\1.32\;fl\;Oz=1.32\;\times\;29.6\;mL\\1.32\;fl\;Oz=39.1\;mL

The volume of the sugar solution reported by Rebekah on the metric scale has been 39.1 mL. Thus, option D is correct.

For more information about the metric system, refer to the link:

brainly.com/question/25011390

4 0
3 years ago
Was mt everest a random event or part of a pattern?
Novosadov [1.4K]
Dang hard
Can you mark me Brainlyist
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3 years ago
Chlorous acid (HClO2) is used in bleaching textiles, leather, paper, and fibers. The value of Ka for chlorous acid is 1.2 ✕ 10−2
soldier1979 [14.2K]

Answer:

1.36

Explanation:

HClO2  ⇄  H+  +  ClO2-

           [HClO2]          [H+}         [ClO2-]

initial:  0.12       0         0

change: -x        +x       +x

equil:   0.12-x    x          x

[H+][ClO2-] / [HClO2] = Ka = 1.2 * 10^-2

x* x / 0.12 - x = 1.2 * 10^-2

x^2 = (2.4  *  10^-3) - (1.2 * 10^-2)x

x^2 +  (1.2 * 10^-2)x – (2.4 * 10^-3) = 0

Upon solving for x,

x = 0.04335

[H+] = 0.04335

pH = -log[H+]

pH = -log(0.04335)  = - (-1.36) = 1.36

5 0
3 years ago
Read 2 more answers
What happens if a chemical and physical change combine together?
sweet-ann [11.9K]

In a chemical change, a new substance is made, like when you burn a candle. In a physical change, no new substance is made, like when water turns to ice.

Source: https://www.generationgenius.com/learn-physical-and-chemical-changes/ (Found on Google :3 )

8 0
3 years ago
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