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Popular Problems

Rank	Topic	Problem	Formatted Problem
5501	Evaluate	(2.0110^6)(9.4110^-7)	$(2.01 \times 10^{6}) (9.41 \times 10^{- 7})$
5502	Balance	HCl+Al(oh)_3→H_2O+AlCl_3	$H C l + A l {(o h)}_{3} \to H_{2} O + A l C l_{3}$
5503	Balance	CaCl_2+Na_2C_2O_4→NaCl+CaC_2O_4	$C a C l_{2} + N a_{2} C_{2} O_{4} \to N a C l + C a C_{2} O_{4}$
5504	Balance	HCl+CaOH_2→CaCl_2+HOH	$H C l + C a O H_{2} \to C a C l_{2} + H O H$
5505	Balance	HCl+H_2O→HCl+HO	$H C l + H_{2} O \to H C l + H O$
5506	Evaluate	(2.33)(3.224)	$(2.33) (3.224)$
5507	Balance	- natural log of \|3-y\|=2x+c	$- \ln (\| 3 - y \|) = 2 x + c$
5508	Balance	N→H	$N \to H$
5509	Balance	Na(OH)+NiCl_2→NaCl+Ni(OH)_2	$N a (O H) + N i C l_{2} \to N a C l + N i {(O H)}_{2}$
5510	Balance	Na_2CO_3+AlCl_3→NaCl+AlCO_3	$N a_{2} C O_{3} + A l C l_{3} \to N a C l + A l C O_{3}$
5511	Balance	Na_2CO_3+CaCl_2H_4O_2→NaCl+CaCO_3+H_2O	$N a_{2} C O_{3} + C a C l_{2} H_{4} O_{2} \to N a C l + C a C O_{3} + H_{2} O$
5512	Balance	Na_2CO_3+CoCl_2→Na_2Cl_3+CoCO_2	$N a_{2} C O_{3} + C o C l_{2} \to N a_{2} C l_{3} + C o C O_{2}$
5513	Balance	Na_2S_2O_3+I_2→Na_2S_2O_4+NaI	$N a_{2} S_{2} O_{3} + I_{2} \to N a_{2} S_{2} O_{4} + N a I$
5514	Balance	MG+N_2=MG_3N_2	$M G + N_{2} = M G_{3} N_{2}$
5515	Balance	Mg+O_2=MgO_2 , wht is the atomic mass of O_2	$M g + O_{2} = M g O_{2}$ , $w h t$ is the atomic mass of $O_{2}$
5516	Evaluate	(-23)-(-22.9)	$(- 23) - (- 22.9)$
5517	Evaluate	(-3-7)(-8-11)	$(- 3 - 7) (- 8 - 11)$
5518	Evaluate	(3)(-14)(-5)(-7)(-9)(4)	$(3) (- 14) (- 5) (- 7) (- 9) (4)$
5519	Balance	MgCl_2+2NaOH→Mg(OH)_2+2NaCl	$M g C l_{2} + 2 N a O H \to M g {(O H)}_{2} + 2 N a C l$
5520	Balance	MgO+H→Mg+PO_4+HOH	$M g O + H \to M g + P O_{4} + H O H$
5521	Balance	MgO+H→MgPO_4+HOH	$M g O + H \to M g P O_{4} + H O H$
5522	Balance	Mn+Mn=Os	$M n + M n = O s$
5523	Balance	k=32yz	$k = 32 y z$
5524	Balance	KCl+CaF_2→KF+CaCl_2	$K C l + C a F_{2} \to K F + C a C l_{2}$
5525	Balance	KClO→KCl+O_2	$K C l O \to K C l + O_{2}$
5526	Balance	KOH+H_2SO_4→(xyz)	$K O H + H_{2} S O_{4} \to (x y z)$
5527	Balance	Li+H_2O→HO+LI_2	$L i + H_{2} O \to H O + L I_{2}$
5528	Balance	HClO_4+KOH→H_2O+KClO_4	$H C l O_{4} + K O H \to H_{2} O + K C l O_{4}$
5529	Balance	Hf+Mn→HfMn	$H f + M n \to H f M n$
5530	Balance	HNO(3)+HI→NO+I_2	$H N O (3) + H I \to N O + I_{2}$
5531	Balance	HNO_3+Ca(OH)_2→Ca(NO_3)+H_2O	$H N O_{3} + C a {(O H)}_{2} \to C a (N O_{3}) + H_{2} O$
5532	Balance	HNO_3+HI→NO+I_2	$H N O_{3} + H I \to N O + I_{2}$
5533	Balance	KIO_3+SO_2+H_2O→I_2+KHSO_4+H_2SO_4	$K I O_{3} + S O_{2} + H_{2} O \to I_{2} + K H S O_{4} + H_{2} S O_{4}$
5534	Balance	K_2SO_4+NaCl→Na_2SO_4+KCl	$K_{2} S O_{4} + N a C l \to N a_{2} S O_{4} + K C l$
5535	Balance	K_3PO_4+H_2SO_4→K_3SO_4+H_3PO_4	$K_{3} P O_{4} + H_{2} S O_{4} \to K_{3} S O_{4} + H_{3} P O_{4}$
5536	Balance	K_3PO+Ba(NO_3)_2→Ba_3(PO_4)_2+3KNO_3	$K_{3} P O + B a {(N O_{3})}_{2} \to B a_{3} {(P O_{4})}_{2} + 3 K N O_{3}$
5537	Balance	H+CO_2→H_2O+C	$H + C O_{2} \to H_{2} O + C$
5538	Balance	H+Ne_2=H+Ne_2	$H + N e_{2} = H + N e_{2}$
5539	Balance	H+O_2H_2→O	$H + O_{2} H_{2} \to O$
5540	Balance	H_2SO_4+Ca(OH)_2→CaSO_4+HOH	$H_{2} S O_{4} + C a {(O H)}_{2} \to C a S O_{4} + H O H$
5541	Balance	H_2SO_4+Na_2O→Na_2SO_4+H_2O	$H_{2} S O_{4} + N a_{2} O \to N a_{2} S O_{4} + H_{2} O$
5542	Balance	H_2SO_4+NaOH=Na_2SO_4+H_2O	$H_{2} S O_{4} + N a O H = N a_{2} S O_{4} + H_{2} O$
5543	Balance	H_2SO_4+NH_4OH→H_2O+(NH_4)_2SO_4	$H_{2} S O_{4} + N H_{4} O H \to H_{2} O + {(N H_{4})}_{2} S O_{4}$
5544	Balance	H_3+F_4→F	$H_{3} + F_{4} \to F$
5545	Balance	H_3+F_4→S	$H_{3} + F_{4} \to S$
5546	Balance	H_3C_6H_6O_7+OH→C_6H_6O_7+H_2O	$H_{3} C_{6} H_{6} O_{7} + O H \to C_{6} H_{6} O_{7} + H_{2} O$
5547	Balance	AlCl_3→Al+Cl_3	$A l C l_{3} \to A l + C l_{3}$
5548	Balance	AlCl=Al+Cl	$A l C l = A l + C l$
5549	Factor	5x-5y	$5 x - 5 y$
5550	Determine the Possible Number of Real Roots	7j+3-4j+9	$7 j + 3 - 4 j + 9$
5551	Balance	Al_4C_3+H_2O→AlOH_3+CH_4	$A l_{4} C_{3} + H_{2} O \to A l O H_{3} + C H_{4}$
5552	Balance	Al+HC→AlCl+H_2	$A l + H C \to A l C l + H_{2}$
5553	Balance	Al+N_2→2N+Al	$A l + N_{2} \to 2 N + A l$
5554	Evaluate	(48)15+35-99	$(4 \cdot 8) \cdot 15 + 35 - 99$
5555	Balance	Al→Cl	$A l \to C l$
5556	Balance	Al_2(SO_4)_3+KOH→Al(OH)_3+K_2SO_4	$A l_{2} {(S O_{4})}_{3} + K O H \to A l {(O H)}_{3} + K_{2} S O_{4}$
5557	Balance	Al_2O_3+Na→Al+Na_2O	$A l_{2} O_{3} + N a \to A l + N a_{2} O$
5558	Balance	B+O_2→B_2O_3	$B + O_{2} \to B_{2} O_{3}$
5559	Evaluate	(4.3-3.7)*12.3	$(4.3 - 3.7) \cdot 12.3$
5560	Balance	Ba(NO_3)_2+H_3PO_4→Ba_3(PO_4)_2+HNO_3	$B a {(N O_{3})}_{2} + H_{3} P O_{4} \to B a_{3} {(P O_{4})}_{2} + H N O_{3}$
5561	Balance	Ba(NO_3)_2(aq)+Na_2SO_4(aq)→BaSO_4(s)+2NaNO_3(aq)	$B a {(N O_{3})}_{2} (a q) + N a_{2} S O_{4} (a q) \to B a S O_{4} (s) + 2 N a N O_{3} (a q)$
5562	Balance	Ba(OH)_2(aq)+H_2SO_4(aq)→BaSO_4+H_2O	$B a {(O H)}_{2} (a q) + H_{2} S O_{4} (a q) \to B a S O_{4} + H_{2} O$
5563	Balance	Ba(OH)_2+2HCl→H_2O+BaCl_2	$B a {(O H)}_{2} + 2 H C l \to H_{2} O + B a C l_{2}$
5564	Balance	BaCl_2+(NH_4)_2CO_3→BaCO_3(5)+NH_4Cl	$B a C l_{2} + {(N H_{4})}_{2} C O_{3} \to B a C O_{3} (5) + N H_{4} C l$
5565	Evaluate	(43.52)*1	$(43.52) \cdot 1$
5566	Evaluate	49.91+3.6532	$49.91 + 3.6532$
5567	Balance	Br_2+NaI→NaBr_2+I_2	$B r_{2} + N a I \to N a B r_{2} + I_{2}$
5568	Balance	Br_2+SO_2→Br+SO_4	$B r_{2} + S O_{2} \to B r + S O_{4}$
5569	Evaluate	-(6-3)-(2-(5-7)-3)	$- (6 - 3) - (2 - (5 - 7) - 3)$
5570	Balance	BrO_3→Br	$B r O_{3} \to B r$
5571	Balance	C_2H_5NH_2+O_2→CO_2+N_2	$C_{2} H_{5} N H_{2} + O_{2} \to C O_{2} + N_{2}$
5572	Simplify	u(t)	$u (t)$
5573	Simplify	-ub	$- u b$
5574	Simplify	ur(mom)	$u r (m o m)$
5575	Simplify	uranium-235	$u r a n i u m - 235$
5576	Simplify	Zn+HZn_2+H_2	$Z n + H Z n_{2} + H_{2}$
5577	Simplify	Zn-65	$Z n - 65$
5578	Simplify	ZnSO_4+5H_2O	$Z n S O_{4} + 5 H_{2} O$
5579	Simplify	Zr-K	$Z r - K$
5580	Balance	Ca+Al(NO_3)_3→Ca_3(NO_3)_2+Al	$C a + A l {(N O_{3})}_{3} \to C a_{3} {(N O_{3})}_{2} + A l$
5581	Balance	Ca+H_3PO_4→Ca_3(PO_4)_2+3H_2	$C a + H_{3} P O_{4} \to C a_{3} {(P O_{4})}_{2} + 3 H_{2}$
5582	Balance	CaCr_2+AlSb→CaCr_2+AlSb_5	$C a C r_{2} + A l S b \to C a C r_{2} + A l S b_{5}$
5583	Balance	CaF_2+LiSO_4→CaSO_4+LiF	$C a F_{2} + L i S O_{4} \to C a S O_{4} + L i F$
5584	Evaluate	(5.847)32.066(4(15.9994))	$(5.847) \cdot 32.066 \cdot (4 (15.9994))$
5585	Balance	CaH_2+H_2O→Ca(OH)_2+H_2	$C a H_{2} + H_{2} O \to C a {(O H)}_{2} + H_{2}$
5586	Evaluate	(55.847)+32.066+4(15.9994)	$(55.847) + 32.066 + 4 (15.9994)$
5587	Balance	CaH_2+H_2O→Ca(OH_2)+H_2	$C a H_{2} + H_{2} O \to C a (O H_{2}) + H_{2}$
5588	Balance	( log base 7 of 3)-( log base 7 of 8) = log of 7	$(\log_{7} (3)) - (\log_{7} (8)) = \log (7)$
5589	Balance	Ca(s)+HBr(aq)→CaBr(2(aq))+H(2(g))	$C a (s) + H B r (a q) \to C a B r (2 (a q)) + H (2 (g))$
5590	Balance	Ca_2+H_2O→Ca_2O_3+H_4	$C a_{2} + H_{2} O \to C a_{2} O_{3} + H_{4}$
5591	Balance	C(s)+2H_2=CH_4(g)	$C (s) + 2 H_{2} = C H_{4} (g)$
5592	Balance	C+2H_2(g)→CH_4(g)	$C + 2 H_{2} (g) \to C H_{4} (g)$
5593	Balance	C+Fe_2O_3→CO_2+Fe	$C + F e_{2} O_{3} \to C O_{2} + F e$
5594	Balance	C+H_2→C_2H_6	$C + H_{2} \to C_{2} H_{6}$
5595	Balance	C+O_2→C	$C + O_{2} \to C$
5596	Balance	C_6H_12O_6+6O_2→6CO_2+6H_2O	$C_{6} H_{12} O_{6} + 6 O_{2} \to 6 C O_{2} + 6 H_{2} O$
5597	Balance	c_4h_12+o_2=co_2+h_2o	$c_{4} h_{12} + o_{2} = c o_{2} + h_{2} o$
5598	Balance	C_3H_8+5O_2→3CO_2+4H_2O	$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
5599	Evaluate	(-6.32)(-8.7)	$(- 6.32) (- 8.7)$
5600	Balance	C_6H_6+2Cl_2→2HCl+C_6Cl_4	$C_{6} H_{6} + 2 C l_{2} \to 2 H C l + C_{6} C l_{4}$