Предмет: Химия, автор: vkulish02

ТЕРМІНОВОО!!!
Яку масу заліза можна добути з 500 кг залізної руди, якщо масова частка Феруму у руді 86%

hrecenbok: 1) m(Fe2O3)=2000кг x 0,70=1400 кг
2) 1400кг (Fe2O3) --- x (Fe)
160кг (Fe2O3) --- 112 (Fe)
x=1400* 112:160= 980 кг

Ответы

Автор ответа: Artyomstern

3

Ответ: m(Fe) = 430 кг

m(руди) = 500 кг

W(Fe) = 86% = 0,86

m(Fe) = 500 × 0,86 = 430 кг

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Complete the text with the passive form of the verbs

Watch Your Step!

Right now in cities around the world ordinary streets and pavements 1)

are being transformed

are transformed  were transformed

into fantastical scenes such as sharks bursting from the cement or giant cracks splitting the earth apart. These are the creations of 3-D street artists. The 3-dimensional effects of these images are so realistic that viewers feel like they 2)

are transported

were transported  are being transported

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are being drawn  were drawn

first with chalk and then they 4)

are being painted

were painted  are painted

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is created

was created  will be created

on a street in Hong Kong. Viewers 6)

were amazed

are amazed  are being amazed  by the image's realistic effect and often avoided stepping on it. Sometimes Mueller 7)

was inspired

is being inspired  is inspired  suddenly and will just start creating a scene in a street. You just never know when the next street 8)

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will be covered  was covered  with a scene from Mueller's imagination!

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