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zvonat [6]
3 years ago
13

List three differences between the earth 240 million years ago and the present earth.

Chemistry
1 answer:
raketka [301]3 years ago
4 0
Dinosaurs, cavemen, sabertooth tiger
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25 pts<br> 3. Compare and contrast a dry cell with a voltaic cell by filling in the table.
Orlov [11]

Answer:

Half Cell  (1)oxidation reaction (2) redox reaction

Anode----(1)and(2) electrochemical cell at which oxidation occurs

Cathode---(1)and(2)electrochemical cell at which reduction

Electrolytes----(1)ammonium chloride------

Oxidation Reaction --- (1)in Anode(2)in Anode

Reduction Reaction----(1)in Cathode(2)in cathode

Bridge---(1)Zinc–carbon battery(2) Galvanic cell

Relative size   ------ (1)smaller--------(2)much larger

Explanation:

6 0
3 years ago
Calculate the amount (in moles) of magnesium in 1.23 g.
rosijanka [135]

Answer

0.32 is that answer

Explanation:

you just use the calculator

4 0
3 years ago
A careless student forgets to label one of their reagent containers. They know it contains one of the following solutions: 0.1 M
antiseptic1488 [7]

Answer:

0.1 M NaCl

Explanation:

This question reminds of of the solubility rules. Let us recall that all chlorides are soluble except those of lead, mercury II and silver which are insoluble in water.

The following reaction will occur leading to the formation of a precipitate;

Pb(NO3)2(aq) + 2NaCl(aq) -------> 2NaNO3(aq) + PbCl2(s)

The white precipitate formed is  PbCl2.

4 0
3 years ago
A car designer is designing a new model of a popular car. He wants to use the same engine as in the old model but improve the ne
DaniilM [7]

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. F = ma; a = F/m. This means that Force over the mass. In order to improve the acceleration without redesigning is that the company has to improve the force assuming that the mass is still the same.



4 0
3 years ago
What are some common mistakes students make with decomposition reactions?
valentina_108 [34]
I think because students get confused or forget which elements are diatomic
A decomposition usually is simple and straight forward but many students just don't know which elements should be diatomic and which shouldn't.
6 0
3 years ago
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