При взаимодействии железа с 20г 10% р-ра соляной кислоты выделилось 0,5л водорода.Рассчитайте массу образовавшегося хлорида железа (II). Вычислить выход водорода в процентах от теоретически возможного.

Найдите пары треугольников и докажите их. Помогите пожалуйста очень надо

Correct the prepositions in the sentences below. In some sentences, there are no mistakes.

Write the correct word in each gap. Write ok if the sentence is correct.

I'm sorry, this size is from of stock.( )

Trendy clothes are usually on demand.( )

Save up money instead of buying things you don't need.( )

Should I pay from card?( )

Don't take pride at your shopaholism.( )

When will this new smartphone be on sale? ( )

Complete the sentences with the correct forms of the verbs in brackets. Don't use contractions.

Write 2–3 words in each gap.

JuliaFrench since she was six. (to learn)

Wea new scooter recently. (to buy)

Ito New York twice. (to be)

Nickto California. I miss him. (to go)

Alfie and Ifor three years. (to date)