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Questions (16)

What is the mass of 50.0 L of O2(g) at STP?O is 16g/mole, so O2 is 32g/mole. 50/32 = 1.5625 moles. 1 mole of any gas at stp is
1. 7 answers
2. 7,601 views
Zn + 2HCl ---> ZnCl2 + H2(g)What mass of zinc is needed to produce 115 mL of hydrogen? t's given 115 mL of hydrogen, so can
1. 7 answers
2. 3,005 views
is this right?Convert the following mass into moles (1 mark) 19.5 grams of Al(OH)3 27.0 + 3(16+1) = 78 19.5/78 = 0.25 moles
1. 3 answers
2. 619 views
Convert the following moles into masses2.00 moles of N2 n=14g 2 x 14 =28 2.00mols x 28 = 56 mols
1. 3 answers
2. 392 views
How many molecules are present in 1.5 moles of NaCl?na =23.0 cl=35.5 23.0 +35.5 = 58.5g 1.5mol x 58.5/1mol = 85.75
1. 4 answers
2. 1,383 views
I need help I'm confusedComplete the following reactions HNO3 + Sr(OH)2 ---->
1. 4 answers
2. 355 views
Zn + Ni(NO3)2-->AlCl3 + Na2CO3--> Al + O2 --> NO2 -->
1. 5 answers
2. 412 views
Please checkComplete the following reactions HNO3 + Sr(OH)2 --> C6H4(OH)2 + O2 --> my answers 2HNO3 + Sr(OH)2 --> Sr(NO3)2 +
1. 4 answers
2. 651 views
KClWhat is the molar mass (to the nearest tenth of a gram/mole) of each of the following 39.1 g/m + 35.5 g/m = 74.6 g/mol
1. 2 answers
2. 715 views
4. 2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O(g) at STPHow many moles of O2 are needed to react with 60.0g of C8H18
1. 2 answers
2. 734 views
2 KOH(l) + H3PO4(l) --> K2HPO4(l) + 2 H2O(l)a) How many mL of 0.450M KOH is needed to react with 60.0mL of 0.250M H3PO4? a)
1. 1 answer
2. 1,043 views
P4O10(s) + 6 H2SO4(l) --> 4 H3PO4(aq) + 6 SO3(g)Pure H2SO4(l) has a density of 1.84 g/mL. If 45.0 mL of H2SO4(l) reacts: What
1. 5 answers
2. 2,448 views
check answer please10. 2 Ca3(PO4)2(s) + 6 SiO2(g) + 10 C(s) ---> P4(s) + 6 CaSiO3(s) + 10 CO(g) If 39.3 g of Ca3(PO4)2, 24.4 g
1. 4 answers
2. 2,424 views
Zn(s) + 2HCl(l) ---> ZnCl2(s) + H2(g) at STPWhat mass of zinc is needed to produce 115 mL of hydrogen? 0.115L/22.4L/mol = 0.0051
1. 2 answers
2. 568 views
N2(g) + 3H2(g)  2NH3(g) at STPHow many litres of ammonia gas is produced using 5 litres of H2? 5L H2 x (2L NH3 / 3L H2) =
1. 5 answers
2. 2,499 views
P4O10(s) + 6 H2SO4(l)  4 H3PO4(aq) + 6 SO3(g)Pure H2SO4(l) has a density of 1.84 g/mL. If 45.0 mL of H2SO4(l) reacts: What
1. 1 answer
2. 1,277 views