Предмет: Химия, автор: feXoa

Дайте название веществам P2O5,NaCl,Al(OH)3,H2CO3,NaHS,Mn2O7,Ca(OH)2,H2SiO3,Na2SO3,FeO,KOH,Cu2O,HBr,Fe(OH)3,SO2,H2SO3,(CuOH)2CO3,HCI,CsOH

Ответы

Автор ответа: juliayrkina
0

P2O5- оксид фосфора(5)
NaCl - хлорид натрия

Al(OH)3- гидроксид алюминия

H2CO3-угольная кислота

NaHS-гидросульфид натрия 

Mn2O7-оксид марганца (7)

Ca(OH)2- гидроксид кальция

H2SiO3-силикатная кислота

Na2SO3-сульфит натрия

FeO-оксид железа(2)

KOH-гидроксид калия

Cu2O-оксид меди(1)

HBr- бромоводород

Fe(OH)3- гидроксид желез(3)

SO2-оксид серы(4)

H2SO3-сульфитная кислота

(CuOH)2CO3-дигидроксокарбонат меди(2)

HCI-хловодород

CsOH-гидроксид цезия

 

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Study the definition of an economist and decide which word A, B, C or D from the table below best fits each gap:
1. A relationship B factors C membership D dependence
2. A commodities B conditions C communities D criteria
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8. A reductions B requirements C restrictions D revisions
9. A hold B keep C make D fit
10. A demand B decrease C decline D develop

An economist is an expert who studies the 1 ____________ between a society’s resources and its production or output. The societies studied may range from the smallest of local 2 ____________ to an entire nation or even the global economy.
The expert opinions and research findings of an economist are used to help
3 ____________ a wide variety of policies, including interest rates, tax laws, employment programs, international trade 4____________and corporate strategies.
There is a good chance that someone interested in a 5_______________ as an economist will work for the government. According to the Bureau of Labor Statistics, 6______________ 50% of all economists work for either a federal or state agency. The rest are 7______________ as professors, by corporations or as part of economic think tanks.
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