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2 years ago

Chemical reaction will occur if ___

Chemistry

1 answer:

stich3 [128]2 years ago

7 0

Answer:

The answer to your question is:

Explanation:

1) the mass of the products is greater than the reactants The mass does not affect that a reaction occurs or not because if there is less quantity of a reactant only will react the proportion. This answer is incorrect.

2) the products are more stable than the reactants This answer is correct, if products are more stable than reactants, then the reaction happens.

3) the products are the same stability as the reactants The both products and reactants have the same stability, the reaction is reversible, then this answer is incorrect.

4)the products are less stable than the reactants if products are less stable than reactants, the reaction does not happen. This option is incorrect.

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Using water, how could you distinguish between the white solids kcl an pbcl2

Alexus [3.1K]

KCl and PbCl2 both are salts having the same white color, however, potassium salts are soluble in water while lead salts are not.
This means that KCl is soluble in water while PbCl2 is not.

So, to distinguish between them, add the same amount of each salt in a beakers containing water (each salt in a separate beaker of course), ans shake the beaker or steer it.
The salt that dissolves in water would be KCl while the salt that doesn't dissolve in water would be PbCl2.

6 0

3 years ago

Read 2 more answers

I need help with this plz help

schepotkina [342]

Answer:

$\rm ^{103}_{\phantom{1}40}Zr$ , zirconium-103.

Explanation:

In a nuclear reaction, both the mass number and atomic number will conserve.

Let $^{A}_{Z}\mathrm{X}$ represent the unknown particle.

The mass number of a particle is the number on the upper-left corner. The atomic number of a particle is the number on its lower-left corner under the mass number. For example, for the particle $^{A}_{Z}\mathrm{X}$ , $A$ is the mass number while $Z$ while $Z$ is the atomic number.

Sum of mass numbers on the left-hand side of the equation:

$\underbrace{239}_{^{239}_{\phantom{2}94}\mathrm{Pu}} + \underbrace{1}_{^{1}_{0}\mathrm{n}} = 240$ .

Note that there are three neutrons on the right-hand side of the equation. Sum of mass numbers on the right-hand side:

$\underbrace{A}_{^{A}_{Z}\mathrm{X}} + \underbrace{134}_{^{134}_{\phantom{2}54}\mathrm{Xe}} + \underbrace{3\times 1}_{3\;^{1}_{0}\mathrm{n}} = A + 137$ .

Mass number conserves. As a result,

$A + 137 = 240$ .

Solve this equation for $A$ :

$A = 103$ .

Among the five choices, the only particle with a mass number of 103 is $\rm ^{103}_{\phantom{1}40}Zr$ . Make sure that atomic number also conserves.

3 0

3 years ago

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 15.6 g of carbon were burned in the presence of

NeX [460]

Answer: 5.72 g mass of carbon dioxide was produced

Explanation:

$C+O_2\rightarrow CO_2$

Moles of C = $\frac{\text{mass of carbon}}{\text{molar mass of carbon}}=\frac{15.6 g}{12 g/mol}=1.3 moles$

Mass of $O_2$ reacted = 59.1 g - 17.5 g = 41.6 g

Moles of $O_2\text{ reacted}=\frac{\text{mass of}O_2}{\text{molar mass of}O_2}=\frac{41.6 g}{32 g/mol}=1.3 moles$

According to reaction 1 mole $O_2$ produces 1 mole of $CO_2$ then 1.3 mole of $O_2$ will produce $\frac{1}{1}\times 1.3$ moles of $CO_2$

Mass of $CO_2$ :

=Moles of $CO_2$ × molar mass of $CO_2$ = 1.3 ×44 g/mol =

=57.2 grams

5.72 g mass of carbon dioxide was produced

7 0

2 years ago

Which higher heat transfer ?

stellarik [79]

Answer:

<u>b)boiling water</u>

Explanation:

High heat is transferred with the thermal conduction process, also called diffusion. Always occurs from a region of higher temperatures to a region of lower temperatures. The flow of fluid may be forced into external processes.

As the particles rapidly move and vibrate and the transfer of heat from one state to the other by the interaction of particles and rate of heat lost has to be the same as absorbed heat during vaporization at the same fluid pressure.

A component of heat transfer can be seen as a heat sink in which transfers the heat generated within any medium. Thus evaporative cooling happens after the vapor is added to the surrounding air.

3 0

3 years ago

In the chemical equation Zn + 2HCl ZnCl2 + H2, the reactants are

Rudik [331]

Answer : The correct option is A.

Explanation :

The given chemical reaction is,

$Zn+2HCl\rightarrow ZnCl_2+H_2$

In the reaction, Reactants are present on the left side of the arrow and products are present on the right side of the arrow.

Reactants are those which takes part in and undergoes change during the reaction.

Products are those which are formed during the reaction.

In the given reaction, zinc react with hydrochloric acid to form zinc chloride and hydrogen gas.

Therefore, the reactants are zinc and hydrochloric acid.

4 0

3 years ago

Read 2 more answers