Chemistry, 02.04.2021 14:00 angelaencinas90
Data Numele elevului Clasa a VIII-aLucrare de control nr. 2–Clasele principale de compuşi anorganiciVarianta 2Total 60pdin care acumulate: p, nota 1.(6p)Se dă şirul de substanţe: NO2, HClO3, FeCl2, NaOH, NiO, HF, Zn(OH)2, LiOH, Ag2SO4, P2O5. Selectează formulele următoarelor substanţe:a)oxizii acizi b)bazele insolubile c)aciziineoxigenaţi d)săruri oxigenate2.(6p)Scrie denumirea substanţelor:a)HBrb)MgF2c)Cu(OH)2d) N2O5e)K3PO4f)H2SO33.(24p)Completeaz ă ecuaţiile reacţiilor şi stabileşte coeficienţii. Indică tipul reacţiei. a) + ...FeO → FeCl2+ b) ...K2CO3+ ...BaCl→ ↓ + KClreacţie de ...c) ...Cu(OH)2Ct+ H2O↑d) ...NO + → NO2reacţie de ...e)...HBr+ ...Na2S → ...H2S↑ + reacţie de ...f)...Zn+ → ZnSO4... + ↑g) ...Ni2O3+ ... H2→ Ni+ reacţie de ...h) ...H2CO3 Ct +reacţie de ...i) ... Cu(NO3)2+ → + Cu↓4.(6p)Se dau substanţele:SO2, KNO3, MgCl2, BaO, Fe, H3PO4, C. Găseşte 3 substanţe care vor reacţiona cu NaOHşi scrie ecuaţiile reacţiilor. a) b) c) 5.(9p)Alcătuiește seria genetică din care face parte HNO3Scrie ecuaţiile reacţiilor ce corespund acestor transformări.1)2) 3) 6.(9p) Rezolvă problema:620g de fosforinteracţionează cu hidrogenul. Ce masă şi cecantitate de PH3se formează
Answers: 3
Chemistry, 22.06.2019 09:00, tbiles99
What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.
Answers: 1
Chemistry, 22.06.2019 21:00, ciel8809
Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.
Answers: 1
Chemistry, 22.06.2019 21:30, shiannethorn
How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l
Answers: 3
Chemistry, 22.06.2019 21:30, steven0448
An atomic nucleus is composed ofa)protons. b)protons and neutrons. c)protons and electrons. d)protons, neutrons, and electrons.
Answers: 1
Data Numele elevului Clasa a VIII-aLucrare de control nr. 2–Clasele principale de compuşi anorganic...
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