Which of the following measurements is written with two significant figures?

Chemistry

1 answer:

diamong [38]3 years ago

8 0

I think C. I'm not 100% sure, tbh.

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When using the benedict's assay, which color would indicate the most reducing sugar present?

hram777 [196]

Brick-red because the most reducing sugar reduces the blue copper salts -that are present in Benedict's solution- to a red compound.

3 0

3 years ago

A 0.1873 g sample of a pure, solid acid, H2X (a diprotic acid) was dissolved in water and titrated with 0.1052 M NaOH solution.

puteri [66]

Answer:

We need 41.8 mL of NaOH

Explanation:

Step 1: Data given

Mass of H2X = 0.1873 grams

Molarity of NaOH solution = 0.1052 M

Molar mass of H2X = 85.00 g/mol

Step 2: The balanced equation

H2X (aq) +2 NaOH (aq) → Na2X (aq) + 2H2O(l)

Step 3: Calculate moles of H2X

Moles H2X = mass H2X / Molar mass H2X

Moles H2X = 0.1873 grams / 85.00 g/mol

Moles H2X = 0.0022 moles

Step 4: Calculate moles of NaOH

For 1 mol H2X we need 2 moles NaOH to produce 1 mole of Na2X and 2 moles of H2O

For 0.0022 moles of H2X we need 0.0044 moles of NaOH

Step 5: Calculate volume of NaOH

Volume of NaOH = moles of NaOH / molarity of NaOH

Volume of NaOH = 0.0044 moles / 0.1052 M

Volume NaOH = 0.0418 L = 41.8 mL

We need 41.8 mL of NaOH

6 0

3 years ago

PLEASE HELP ASAP!!! LOTS OF POINTS^^

Serggg [28]

1. An isomers, are molecules with the same chemical formula but different structural formula.

2. Isomers of hexane are skeletal isomers. They have the same chemical formula (C₆H₁₄) but have different carbon chain and different chemical properties.
There are five isomers of hexane.

Look at the attachment :)