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Valentin [98]
2 years ago
11

What type of reaction is 3 and 4 ?

Chemistry
2 answers:
lilavasa [31]2 years ago
8 0

Answer:

3 is decomposition

4 is double replacement

Explanation:

In decomposition reactions, a compound (two or more elements) are broken down into singular elements.

Double replacement reactions have two different compounds, one element from a compound switches with another element in the other compound.

Dmitry [639]2 years ago
6 0

Explanation:

3.)

2NaN3(s) → 2Na(s) + 3N2(g)

= Decomposition Reaction

4.)

Ba(NO3)2 + K2SO4 → 2KNO3 + BaSO4

= Double Displacement Reaction

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Q #4 please help if you are sure
Mashutka [201]

(Answer) (d) Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

Rate of a chemical reaction refers to rate of formation of products from reactions during a chemical reaction. The rates of chemical reactions depend on various factors such as temperature, pressure, concentration of reactants, presence of catalyst etc. For this reason, chemical reaction rates vary with the conditions of the reaction.

Nuclear decay rate refers to the constant ratio of the number of atoms of radioactive nucleus that decay during a certain interval of time to the total number of radioactive atoms at the beginning of the time interval. Nuclear decay rates are constant and do not vary with the conditions of the reaction.

8 0
2 years ago
How does the weight of your skin compare to the weight of your brain
yuradex [85]
"Skin weighs twice as much as the brain"

7 0
3 years ago
Now look at the volcano map what type of boundary tends to give rise to volcanic activity
DochEvi [55]
Divergent and convergent plate boundaries cause volcanic activity
8 0
2 years ago
Compared with halogens, the alkali metals in the same period has
Rufina [12.5K]
Alkali metals have the lowest electronegativities, while halogens have the highest.
3 0
2 years ago
A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
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