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How does the reactivity of Group 1 Metals with water change down the group?

This is due to the shielding effect. When a group 1 metal reacts with water the reaction proceeds through the formation of an ionic species MOH where M is any group 1 metal. Since the species for...

JG
Answered by Joseph G. Chemistry tutor
4392 Views

Students placed some grass cuttings in a vacuum flask and attached a carbon dioxide sensor. Why would the carbon dioxide levels increase over a period of 20 days?

The decomposing microorganisms that contribute to the decay of the grass must respire and respiration leads to the production and release of carbon dioxide.

GB
Answered by Georgia B. Biology tutor
5666 Views

Expand and simplify (3 + √ 2)(5 – √ 2)

To complete this question we can use the FOIL method.

First we can multiply out the First number in each of the brackets - 3x5=15

Then we multiply the Outer numbers in each bracket - 3x-√ 2=...

EJ
Answered by Emily J. Maths tutor
10956 Views

When do you use 'haben' and when do you use 'sein' in the perfect tense?

In the perfect tense, sentences are formed using an auxiliary / helping verb (haben or sein) and the past participle. Haben is translated as 'to have', whilst sein is t...

CS
Answered by Chloe S. German tutor
6872 Views

How do you form the past compound tense?

The past compound tense is formed with two key components. The first component is the present tense conjugation of the verb avoir or être (these are called the auxiliary verbs) and the second is the past ...

MB
Answered by Molly-Rose B. French tutor
2586 Views

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