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4 years ago

Explain examples of a physical and chemical change of matter

Chemistry

1 answer:

monitta4 years ago

6 0

HEY DEAR..

PHYSICAL CHANGE

Those Changes in which no new substances are formed are called physical changes. it is a temporary changes which can be reversed easily to form the original substance.

Example:- Melting of ice , Making a solution, Glowing of an electric bulb , freezing of water etc.

CHEMICAL CHANGE

Those changes in which new substances are formed are called chemical changes. it means it is permanent changes which are usually irreversible.

Example:- Burning of charcoal, fuels and cutting of trees, even digestion of food is in chemical change.

HOPE ITS HELPFULLL

BE BRAINLY.

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3 years ago

The disaccharide lactose can be decomposed into its constituent sugars galactose and glucose. This decomposition can be accompli

n200080 [17]

Answer:

Rate = 116m⁻¹s⁻¹[lactose][H]⁺

Explanation:

the formula for rate of reaction is given as

Rate = k[lactose]∧α[H]⁺∧β

we solve for the value of α and β

([lactose]₁/[lactose]₂)∧α

α = $\frac{ln\frac{0.00116}{0.00232} }{ln\frac{0.01}{0.02} }$

when we divide this equation

α = $\frac{ln0.5}{ln0.5}$

α = 1

we find β

R₁/R₂ = 0.01/0.02(0.001/0.001)∧β

0.00116/0.00232 = 0.5(1)∧β

β = 1

Rate = k[lactose]∧α[H]⁺∧β

we have to find the value for k

k = 0.00116/0.01(0.001)

k = 0.00116/0.00001

= 116m⁻¹s⁻¹

Rate = 116m⁻¹s⁻¹[lactose][H]⁺

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3 years ago