prestonpalma
prestonpalma
04-05-2021
Mathematics
contestada
please i really need help
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queen90649
queen90649
04-05-2021
76 and72 north 72 and south 76 thanks and you welcome
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Which element, represented by X, reacts with fluorine to produce the compound XF2? (1) aluminum (3) magnesium (2) argon (4) sodium
Which substance is an Arrhenius acid? (1) LiF(aq) (3) Mg(OH)2(aq) (2) HBr(aq) (4) CH3CHO
What gas was present in earth's earliest atmosphere and used by cyanobacteria during photosynthesis? A. oxygen B. carbon dioxide C. nitrogen D. methane
Given the balanced equation representing a reaction: Cl2(g) ==> Cl(g) + Cl(g) What occurs during this change? (1) Energy is absorbed and a bond is broken. (2
Which balanced equation represents a chemical change? (1) H2O(l) + energy → H2O(g) (2) 2H2O(l) + energy → 2H2(g) + O2(g) (3) H2O(l) → H2O(s) + energy (4) H2O(g)
Which two particles make up most of the mass of a hydrogen-2 atom? (1) electron and neutron (2) electron and proton (3) proton and neutron (4) proton and positr
Which element has chemical properties that are most similar to the chemical properties of fluorine? (1) boron (3) neon (2) chlorine (4) oxygen
Justify each of your steps using number properties 2x+3y+2x-2y-3x
what is the name of the large inland body of water bordered by Iran, Azerbaijan , Russia , Kazakhstan , and Turkmenistan
Which characteristic is a property of molecular substances? (1) good heat conductivity(2) good electrical conductivity(3) low melting point(4) high melting poin
