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3 years ago

Which of these reasons did you include in your response? Check all of the boxes that apply.

Chemistry

2 answers:

dalvyx [7]3 years ago

5 0

Where r the reasons ma’am

pashok25 [27]3 years ago

4 0

I need to see the reasons.

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Calculate with the correct number of significant figures 2.0 x 10^5 x 3.00 x 10^8

xxMikexx [17]

Answer:

the correct answer is 17 significant figures

3 0

3 years ago

There is a balloon filled with 1 liter of methane, CH4 gas at STP and a balloon filled with one liter of hydrogen gas, H2 at STP

ankoles [38]

Answer:

Explanation:

I would say H2 cause CH4 have less hydrogen gas .

6 0

3 years ago

Vitamin C, also known as ascorbic acid, is composed of 40.9 percent carbon, 4.6 percent hydrogen, and 54.5 percent oxygen. The m

Vladimir79 [104]

Answer:

Molecular formula is : C₆H₈O₆

Explanation:

40.9 % of C, 4.6 % of H, 54.5 % of O means that in 100 g of ascorbic acid, we have 40.9 g of C, 4.6 g of H and 54.5 g of O.

If 1 mol of ascorbic acid weighs 176 g, let's determine the rules of three to know the grams of each element:

100 g of compound has ___ 40.9 g C __ 4.6 g H ___ 54.5 g O

176 g compound mus have:

(176 . 40.9) / 100 = 72 g of C

(176 . 4.6) / 100 = 8 g of H

(176 . 54.5) / 100 = 96 g of O

If we convert the mass to moles:

72 g . 1 mol / 12 g = 6 C

8 g . 1 mol/ 1g = 8 H

96 g . 1mol / 16 g = 6 O

Molecular formula is : C₆H₈O₆

In conclussion, 1 mol of ascorbic acid has 6 moles of C, 8 moles of H and 6 moles of O

6 0

3 years ago

Light acts like a

8_murik_8 [283]

Particle
wave are the words you're looking for to fill in the blanks

7 0

3 years ago

Read 2 more answers

The titration of 78.5 mL of an unknown concentration H3PO4 solution requires 134 mL of 0.224 M KOH solution. What is the concent

Katyanochek1 [597]

Answer:

0.127 M.

Explanation:

The balanced equation for the reaction is given below:

H3PO4 + 3KOH —› K3PO4 + 3H2O

From the balanced equation above, we obtained the following data:

Mole ratio of acid, H3PO4 (nA) = 1

Mole ratio of base, KOH (nB) = 3

Data obtained from the question include:

Volume of acid, H3PO4 (Va) = 78.5 mL

Molarity of acid, H3PO4 (Ma) =...?

Volume of base, KOH (Vb) = 134 mL

Molarity of base, KOH (Mb) = 0.224 M

The concentration of the acid, H3PO4 can be obtained as follow:

MaVa / MbVb = nA/nB

Ma x 78.5 / 0.224 x 134 = 1/3

Cross multiply

Ma x 78.5 x 3 = 0.224 x 134 x 1

Divide both side by 78.5 x 3

Ma = (0.224 x 134 x 1) /(78.5 x 3)

Ma = 0.127 M

Therefore, the concentration of the acid, H3PO4 is 0.127 M.

3 0

3 years ago