Answer:
K2CrO4
Explanation:
To find the empirical formula, we need to divide each element by its atomic mass. The atomic masses of potassium, chromium and oxygen are 39.0983, 51.9961 and 15.999 respectively. We make the divisions as follows:
K = 1.04/39.0983 = 0.027
Cr = 0.70/51.9961 = 0.013
O = 0.86/15.999 = 0.054
We now divide by the smallest which is the number of moles of the Chromium
K = 0.027/0.013 = 2
Cr = 0.013/0.013 = 1
K = 0.054/0.013 = 4 approximately
The empirical formula is thus:
K2CrO4
I took this quiz and the correct answer is not A.
4Na3PO4 The 4 at the beginning of the formula is important, it means you multiply everything after it by 4 so you would instead get the answer,
D. 12 Sodium, 4 phosphorus, 16 oxygen
Answer:
In the mixture of table salt, sand, solid iodine and iron fillings, iron filings is the only solid that is magnetic. Hence, it can be separated using a magnet. When a magnet is moved through the mixture, iron fillings get attracted to the magnet out of the mixture, leaving the salt, iodine and sand.
LINK: https://www.bartleby.com/questions-and-answers/use-complete-sentences-to-describe-how-you-would-separate-a-mixture-of-sand-solid-iodine-table-salt-/b7fc7dce-a82a-4b62-8950-951adb039cab
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<span>4 Cu2O + C2 = 8 Cu + 2 CO2 </span><span>Reaction type: single replacement i hope this hopes
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How much was the cost for rescuing each whale?