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GrogVix [38]
3 years ago
5

The rate of chemical changes (how fast they occur) can depend on several factors. What are two factors that can influence the ra

te of a chemical change? Explain how these factors might affect chemical changes.
Chemistry
1 answer:
bazaltina [42]3 years ago
6 0

Answer:

surface area of a solid reactant.

concentration or pressure of a reactant.

temperature.

nature of the reactants.

presence/absence of a catalyst.

Explanation:

You might be interested in
While camping you light a small campfire, initiating the combustion of wood to produce heat and
Ksju [112]

Answer:

A. It is exothermic

Explanation:

Combustion is a chemical reaction in which a substance combines with oxygen present in air to produce carbon (iv) oxide and water as well release  heat and light energy.Combustion is an exothermic process.

An exothermic reaction releases energy in the form of heat to the surroundings. The energy required to break bonds in the reactants is less than the energy required to form new bonds in the products in an exothermic reaction.

From the given options;

A. It is exothermic is determinable since the reaction is a combustion reaction

B. The bond making energy is more than 600 kJ is not certain because the mass of the wood being burnt is not given. Also, wood is not composed of a specific element that would be taking part in the reaction, rather it is composed of various substances.

C. It is endothermic. is wrong because combustion of wood is exothermic.

D. The bond breaking energy is more than 600 kJ is not certain because the mass of the wood being burnt is not given. Also, wood is not composed of a specific element that would be taking part in the reaction, rather is composed of many substances.

5 0
3 years ago
Explain how mass and energy can be conserved even during a chemical change.
AleksandrR [38]
Mass/ energy can not be created or destroyed 
4 0
3 years ago
How many bonding electrons are shown below?<br> H-C=C-H
padilas [110]

Answer:

There are total 8 bonding electrons 6 frm the both Carbons and 2 from both hydrogens.

Explanation:

7 0
3 years ago
If I have 1.9 moles of gas held at a pressure of 5 atm and in a container with a volume of 100 liters, what is the temperature o
Ivahew [28]

Answer:

T = 3206.89 K

Explanation:

Given that,

Number of moles, n = 1.9 moles

Pressure, P = 5 atm

Volume, V = 100 L

We need to find the temperature of the gas. Let the temperature is T. We know that,

PV = nRT

Where

R is gas constant, R = 0.08206 L-atm/mol-K

Put all the values,

T=\dfrac{PV}{nR}\\\\T=\dfrac{5\times 100}{1.9\times 0.08206 }\\\\T=3206.89\ K

So, the temperature of the gas is 3206.89 K.

7 0
3 years ago
+
Alex

Answer: 0.714 moles of PbI_2 will be produced from 237.1 g of potassium iodide

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of potassium iodide}=\frac{237.1g}{166g/mol}=1.428moles

The balanced chemical reaction is:

Pb(NO_3)_2+2KI\rightarrow PbI_2+2KNO_3

According to stoichiometry :

2 moles of KI produce =  1 mole of PbI_2

Thus moles of KI will require=\frac{1}{2}\times 1.428=0.714moles  of PbI_2

Thus 0.714 moles of PbI_2 will be produced from 237.1 g of potassium iodide

6 0
3 years ago
Read 2 more answers
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