Answer:
Predominantly ,the color is due to cation Ba2+.
Explanation:
Flame Test : The flame due barium cation is Green in color.
Anions such as Cl- and SO42- slightly (very little) affects the color . Hence ,
BaCl2 and BaSO4 gives Yellow -green flame not pure green
Ba 2+ cation gives green colour because:
It has loosely bounded outermost electron (low ionisation)
It absorb energy from the flame , get excited to higher energy state. When the excited electron comes back to ground state , it emits colour of particular frequency.
Different fabrics rub together, and electrons may rub off
Answer:
78% nitrogen, 21% oxygen and about 1 percent argon
Explanation:
1,234,500 mg is equivalent to 1.234 kilograms in four significant figures.
<h3>How to convert mg to kg?</h3>
Milligrams and kilograms are both units of mass that represents 1 × 10-³grams and 1 × 10³grams respectively.
However, they are both inter-convertible and can be converted as follows:
1 milligram = 1 × 10-⁶ kilogram
This means that 1,234,500 mg = 1,234,500 × 10-⁶ kg
= 1.234 kilograms
Therefore, 1,234,500 mg is equivalent to 1.234 kilograms in four significant figures.
Learn more about milligrams at: brainly.com/question/20320382
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