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sladkih [1.3K]
3 years ago
15

Which of the following claims are based on scientific evidence? Red sky at night sailors' delight, red sky in morning sailors ta

ke warning. Touching toads gives you warts. It's safe to eat food dropped on the floor as long as you adhere to the 5-second rule. Chicken soup is good for the common cold.
Chemistry
1 answer:
vodomira [7]3 years ago
3 0
I would believe that the  answer to this question would be the "Touching toads gives you warts
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Consider the reaction shown.
Allushta [10]

Answer:

4.43 g Cl₂

Explanation:

To find the mass of Cl₂, you need to (1) convert moles HCl to moles Cl₂ (via the mole-to-mole ratio from equation coefficients) and then (2) convert moles Cl₂ to grams (via the molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units. The final answer should have 3 significant figures like the given value.

4 HCl(g) + O₂(g) -----> 2 Cl₂(g) + 2 H₂O(g)
^                                   ^

Molar Mass (Cl₂): 2(35.453 g/mol)

Molar Mass (Cl₂): 70.906 g/mol

0.125 moles HCl          2 moles Cl₂             70.906 g
--------------------------  x  ----------------------  x  -------------------  =  4.43 g Cl₂
                                     4 moles HCl              1 mole

6 0
2 years ago
What type of compound is calcium oxide
DIA [1.3K]
A carbonate because the oxygen neutralizes the reactive coding of the calcium in its original form.
5 0
3 years ago
Options are upper left upper right bottom left bottom right for both problems please help!
polet [3.4K]

Answer:

(upper right) corner of the periodic table to the bottom left corner

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3 years ago
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mixer [17]

Answer:

0.00580 →

3000 →

0.000908 →

200. →

Explanation:

yay

7 0
3 years ago
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I would have to say C. Response.
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3 years ago
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