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Author Question: How many atoms are in one molecule of Na2SO4? A) 7 B) 2 C) 4 D) 3 E) ... (Read 26 times) |
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.