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Ira Lisetskai [31]
3 years ago
9

Have your thoughts about the Great Pacific Garbage Patch changed since we first talked about it earlier in the year? Do you thin

k it is a major concern in the world today?
Its a opinion question please answer it no links please THank you !! :)
Chemistry
1 answer:
Korolek [52]3 years ago
6 0

Answer:

Sowwi I just need the points :(

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In the lab you react 2.0 g of Na2CO3 with enough CaCl2. According to the reaction Na2CO3 + CaCl2 -> CaCO3 + 2NaCl How much Ca
vlada-n [284]

Answer:

1.89 g CaCO₃

Explanation:

You will have to use stoichiometry for this question.  First, look at the chemical equation.

Na₂CO₃  +  CaCl₂  ==>  2 NaCl  +  CaCO₃

From the above equation, you can see that for one mole of Na₂CO₃, you will produce one mole of CaCO₃.  This means that however many moles of Na₂CO₃ you have in the beginning, you will have the same amount of moles  of CaCO₃, theoretically speaking.

So, convert grams to moles.  You should get 0.0189 mol Na₂CO₃.  This means that you will get 0.0189 mol CaCO₃.  I'm not sure what units you want the answer in, but I'm going to give it in grams.  Convert moles to grams.  Your answer should be 1.89 g.

3 0
4 years ago
Both coal and diamonds are forms of elemental carbon. Coal is brittle while diamonds are considered to be the hardest of all sub
iragen [17]
Although coal and diamonds are both composed of carbons alone, they differ in their properties because of the bonds present in each substance. Diamonds are composed of covalent bonds which are strong and is crystalline in nature which makes it sturdier. Coal is amorphous which allows the slipping of irregular layers to each other making coal brittle
5 0
3 years ago
When the methyl ester of hexanoic acid is hydrolyzed in aqueous sodium hydroxide in the presence of heat, a homogeneous solution
Dovator [93]

Answer:

Hexanoic acid is formed as insoluble product

Explanation:

  • In aqueous sodium hydroxide, methyl ester of hexanoic acid hydrolyzes to produce soluble sodium hexanoate salt.
  • Upon addition of aqueous HCl, hexanoate ion is protonated to produce hexanoic acid which is insoluble in water.
  • Hence, upon acidification of hydrolysis solution, two separate layers (organic and aqueous) are formed.
  • Reaction are shown below.

4 0
3 years ago
What is the biggest difference between an exothermic and endothermic process?
Nuetrik [128]
B.the amount of energy transferred.
5 0
3 years ago
Read 2 more answers
Two common uses for electromagnets are _____.
Novosadov [1.4K]

Two common uses for electromagnets are _producing strong magnetic fields_& __electrical switches_.

Explanation:

An electric current can turn a ferromagnetic material temporarily magnetic using Faraday's principle, if the wire carrying the current is wound in coils around the ferromagnetic material. When the electric current is turned on the ferromagnetic material, such as iron, becomes magnetic but loses the magnetism when the current is switched off. This application can be used in a junkyard where a crane with a ferromagnetic arm can lift scrap cars from one point and dump them is a scrapper.

An electromagnet switch can also be applied in the switching on and off of a larger current. These are called relay switches. When the smaller current is turn on, it magnetizes a ferromagnetic material. The magnet then attracts another metal that is attached to a contact arm of a switch. The attraction results in the closing of a switch  of a larger current. When the smaller current is switched off, the loss of magnetism causes the metal with the contact arm to open the larger switch.

Learn More:

For more on electromagnets check out;

brainly.com/question/12350331

brainly.com/question/13445759

#LearnWithBrainly

6 0
3 years ago
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