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lidiya [134]
3 years ago
13

PLEASE HELP WITH THESE THREE (30 POINTS)

Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
4 0
1. B
2. C
3. C


hope this helps
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Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)
Lera25 [3.4K]

Answer:

m = 190. g MgCl2

Explanation:

Use a molar ratio to get the # of moles MgCl2 produced from 4.00 mol of HCl:

4.00 mol HCl × (1 mol MgCl2/2 mol HCl) = 2.00 mil MgCl2

So 2.00 moles of MgCl2 will be produced. To find the mass in grams, use the molar mass of MgCl2:

2.00 mol MgCl2 × (95.211 g MgCl2/1 mol MgCl2)

= 190. g MgCl2

8 0
3 years ago
The equation, reactants<br> product + thermal energy, describes a(n)_____<br> reaction.
masya89 [10]

Answer: Here you go

Explanation:

The general equation for an exothermic reaction is: Reactants → Products + Energy.

5 0
3 years ago
Which of the following is not a step in the conversion of 37 L to dam3?
MArishka [77]
The first one. observe that numerator and denominator are of same type in all other cases. but in 1st one, its length/volume which is crazy. how can one equate length to volume ? no way.
3 0
3 years ago
Suggest an experimental method for measuring the change in concentration with time for each of the following reactions:(b) 2NO(g
USPshnik [31]

The experimental method for measuring the change in concentration with time for the given reaction is by measuring the amount of gas a reaction releases over time.

2NO(g) + Cl₂(g) → 2NOCl(g)

<h3>What is reaction rate?</h3>
  • The reaction rate is the rate at which a chemical reaction proceeds.
  • Which is proportional to both the increase in a product's concentration per unit time and the decrease in a reactant's concentration per unit time.
  • There is a wide range in reaction times.
  • The general definition is that the term "rate of a reaction" refers to the pace at which a reaction occurs.
  • As an illustration, iron rusting has a low reaction rate since the process is slow but wood burning has a high reaction rate because the process is quick.

Learn more about reaction rate here:

brainly.com/question/13440548

#SPJ4

7 0
1 year ago
An elephant has a mass of 4000 kg goes to the moon to participate in the Elephant
expeople1 [14]

Answer:

Ano daw

Explanation:

Di ko alam sagot eh

5 0
3 years ago
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