Chemistry, 03.10.2021 14:00 angelica7773
Hòa tan Hoàn toàn 43,8g CaCl2 .6H2O trong 300ml nước . Tính C% ? CM ?
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
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Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part
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What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?
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Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.
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