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coldgirl [10]
3 years ago
13

Name 3 variables that afect a living systom

Chemistry
1 answer:
emmasim [6.3K]3 years ago
5 0
1. Environment
2. Temperature 
3. Food
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What are the evidences for suspecting the presence of waves?
Vsevolod [243]

Answer:

Well,

Conducting rods are good for detecting oscillating electric fields and conducting loops are good for detecting the presence of radio waves.  

5 0
2 years ago
Families 1-2 and 13-18 are called the...
Zolol [24]

Answer:

C. representative elements.

Explanation:

Families 1 - 2 and 13 - 18 are called representative elements or often times, main group elements.

  • Elements on the periodic table belongs to four blocks which are s, p, d and f blocks.
  • Those in the s and p-blocks are the main group elements also called representative elements.
  • Their outer-shell are not completely filled with electrons but their inner shell is completely filled.
5 0
3 years ago
How many moles of H2O are needed to produce 5.6 mol of NaOH?<br> Na2O + H2O --&gt; 2NaOH
navik [9.2K]

Answer: 2.8 moles

Explanation:

The balanced equation below shows that 1 mole of sodium oxide reacts with 1 mole of water to form 2 moles of sodium hydroxide respectively.

Na2O + H2O --> 2NaOH

1 mole of H2O = 2 moles of NaOH

Let Z moles of H2O = 5.6 mole of NaOH

To get the value of Z, cross multiply

5.6 moles x 1 mole= Z x 2 moles

5.6 = 2Z

Divide both sides by 2

5.6/2 = 2Z/2

2.8 = Z

Thus, 2.8moles of H2O are needed to produce 5.6 mol of NaOH

3 0
3 years ago
What is the purpose of the catalyst?
Hitman42 [59]
Its C

a catalyst speeds up a reaction by offering the reaction an alternative reaction pathway with a lower activation energy 

hope that helps 
5 0
2 years ago
Sort the examples based on whether they describe a physical change or a chemical reaction. growth of a seed into a seedling tarn
Pepsi [2]

Answer: I did the research myself since I couldn’t find the answers.

Physical change:

Wax melting from applied heat

Grinding wheat to make flour

Adding copper with gold to make jewelry

Chemical Reaction:

Growth of a seed into a seedling

Making caramel by burning sugar

Tarnishing of silver

Explanation:

Thanks google

4 0
2 years ago
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