A1 is a termination point on a contactor it is an alseriery going to another point.
A1 means "top quality" or "first class." The slang originated in the 1720s when ships were classified in registries by letter and number "A1" would be the best, highest class ship. So A1 Travel means roughly First Class Travel or Top Quality Travel.
School stay
A1 drawing boards are mostley used for builders when designing houses or small scale shops they are not used for huge scale developments.
It ia really easy it is 8
CuCl2
CuO + 2HCL - CuCl2 + H2O
CuCl2 is the product.
cu(II) + 2agcl --> 2ag+cucl2
NiCl2 + 2Na --> 2NaCl + Ni
mg + CuCl2 + MgCl2 + Cu Mg + Cu^+2 = Mg^+2 + Cu
single replacement
This is a redox reaction.
For =A1+B1, the operator is the plus sign (+).
2 HCL + CuS
These compounds are CuSO3 CuS CuCl2..
2HCl + Cu -> CuCl2 + H2 Assuming that it's Copper (II). CuCl2=Copper Chloride