Предмет: Химия, автор: mariya9371

ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО!!!

=)определить моляльную и молярную концентрации H2SO4 в растворе серной кислоты с С%(H2SO4)=50,5%(p=1,40г/мл)

mariya9371: спасибо большое

Ответы

Автор ответа: Аноним

Cм. = (1000*p*w)/M = (1.4*1000*0.505)/98 = 7.214 моль/л;

моляльность р-ра = Cм./(p*(1-w)) = 7.214/(1.4*(1-0.505)) = 10.41 моль/кг.

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Meals in Britain

A traditional English breakfast is a very big meal – sausages, bacon, eggs, tomatoes,
mushrooms… But nowadays many people just have cereal with milk and sugar, or toast with marmalade,
jam, or honey. Marmalade and jam are not the same! Marmalade is made from oranges and jam is made
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workers can choose the kind of bread they want – brown , white, or a roll – and then all sorts of salad and
meat or fish to go in the sandwich. Pubs often serve good, cheap food, both hot and cold. Schoolchildren
can have a hot meal at school, but many just take a snack from home - a sandwich, a drink, some fruit,
and perhaps some crisps.
“Tea” means two things. It is a drink and a meal! Some people have afternoon tea, with
sandwiches, cakes, and of course a cup of tea. Cream teas are popular. You have scones (a kind of cake)
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The British like food from other countries, too, especially Italian, French, Chinese, and Indian.
People often get takeaway meals – you buy the food at the restaurant and then bring it home to eat. Eating
in Britain is quite international.

ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО!!! =)определить моляльную и молярную концентрации H2SO4 в растворе серной кислоты с С%(H2SO4)=50,5%(p=1,40г/мл)

Ответы

ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО!!!

=)определить моляльную и молярную концентрации H2SO4 в растворе серной кислоты с С%(H2SO4)=50,5%(p=1,40г/мл)