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The same mass of large, medium and small marbles where reacted separately with diluted HCl. This is and exothermic reaction. Will the rise in temperature for each reaction differ? If yes than why?

The smallest marbles will give the highest rise in temperature, than the medium and lastly the largest marbles will give the lovest rise in temperature. The smaller the beeds the larger the surface area that...
IR
Answered by Ines R. • Chemistry tutor
3349 Views

Solve 3x – 5 < 16

The question is asking you to isolate, or find out what 'x' is in relation to the equation. Don't be confused by the less than sign '&lt;'. Treat it like an equals sign '='. 3x - 5 =16. So let's get the x by...
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Answered by Judith O. • Maths tutor
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Which component of the vaccine stimulates an immune defence? How do they prevent people from catching the disease e.g. mumps?

inactive pathogens white blood cells produce antibodies these antibodies can be then quickly released whrn the immune system comes into contact with the live pathogen and destoy it
IR
Answered by Ines R. • Biology tutor
3306 Views

Does water travel up or down the concentration gradient?

Via osmosis, water travels down the concentration gradient to an area of lower water concentration and higher concntration of other substances.
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Answered by Jenny R. • Biology tutor
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"Me llamo Martina. Tengo 12 anos y vivo con mi familia - este incluye mis abuelos. Mi relación con mi abuela es mejor que mi relación con mi madre porque mi abuela me apoya" Who does martina have a better relationship with?

Martina has a better relationship with her grandmother because she says 'mi relación con mi abuela es mejor' which translates to 'my relationship with my grandmother is better'.
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Answered by Martha B. • Spanish tutor
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