Să se determine natura agresivităţii şi gradul acesteia în cazul unei ape care conține: - CO2 liber 40 mg/l,
- are Dt = 9 oG,
- sulfați 1200 mg/l,
- celelalte componente sunt in concentrații neglijabile.
Să se stabilească măsurile de protecţie primară dacă apa acţionează asupra unei construcţii din
beton armat, cu diametrul maxim al agregatelor dmax= 31,5 mm.

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99

What is the mass of 0.750 mole of aluminum oxide, al2o3?