2. Andrei prepară în laborator o soluție de zahăr prin amestecarea a 655 g de apă cu 245g de zahăr. Se cere: a) Notează masa de solvat si masa de apă din soluție. 0.5p
b) Calculează masa de soluție formată și concentrația ei procentuală. 1 p
c) Notează dacă soluția obținută de Andrei este diluată sau concentrată. 0.5 p
d) Peste soluția preparată mai sus Andrei adaugă 50g de zahăr. Ce concentrație procentuală are noua soluție formată. Îmi trebuie răspunsurile rapid

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– 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.

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out