Chemistry, 07.12.2020 06:50 drippyyahja
Which of the following represents the law of conservation of mass (a balanced chemical equation)?
Hg + O2 β HgO
Hg + O2 β HgO
2NaN3 β 2Na + 3N2
2NaN3 β 2Na + 3N2
C+O β CO2
C+O β CO2
CH4 + O2 β CO2 +H2O
Answers: 3
Chemistry, 22.06.2019 03:30
The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for clβ is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.
Answers: 2
Chemistry, 22.06.2019 05:00
Which position represents spring in the southern hemisphere? a) b) c) d)
Answers: 2
Chemistry, 22.06.2019 18:30
Read the claim. breakfast is an important meal. it jump starts the bodyβs process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes
Answers: 1
Which of the following represents the law of conservation of mass (a balanced chemical equation)?
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