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Ronch [10]
2 years ago
12

What is the energy of a radio wave whose frequency is 6.2 x 106 Hz?

Chemistry
1 answer:
slava [35]2 years ago
7 0

Answer:

657.2 Hz

Explanation:

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3 years ago
What is not a guideline required for a valid evidence test?
kirill115 [55]
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3 years ago
What is the overall energy transformation in a coal-fired power plant?.
polet [3.4K]

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Hope this helps.

7 0
2 years ago
What sample size (grams) of Na3PO4 (FW 164.00) known to be 50.00% pure should be used to consume exactly 40.00 mL of 0.1000 M HC
Mkey [24]

Answer:

0.109 g.

Explanation:

Equation of the reaction:

Na3PO4 + 3HCl --> 3NaCl + H3PO4

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= 0.1 × 0.04

= 0.004 mol.

By stoichiometry, 1 mole of Na3PO4 neutralises 3 moles of HCl. Therefore, number of moles of Na3PO4 = 0.004/3

= 0.0013 mol

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= 0.0013 × 164

= 0.219 g

Since 50% of Na3PO4 was present in the sample. Let 100 g be the total mass of the substance

= 0.219 × 50 g/100 g

= 0.109 g.

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3 years ago
Part b select the ester that is formed when propanoic acid reacts with isopropyl alcohol in the presence of heat and an acid cat
Otrada [13]
<span>The ester that is formed by combining propanioc acid with isopropyl alcohol, using heat and an acid catalyst is isopropyl propanoate.</span>
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