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tekilochka [14]
3 years ago
7

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing filtration

sorting
Chemistry
2 answers:
Dvinal [7]3 years ago
7 0

Correct answer choice is :


A) Boiling


Explanation:


Boiling is the fast evaporation of a water, which happens when a liquid is boiled to its boiling point, the temperature at which the condensation pressure of the liquid is equal to the force used on the liquid by the nearby environment. Boil or steam the water and the salt will be left after as a solid. If you want to get the water, you can use distillation. This works because salt has a much greater boiling point than water.

sergij07 [2.7K]3 years ago
3 0
I think it's boiling :)
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Nataly [62]

<u>Answer:</u> The tree was burned 16846.4 years ago to make the ancient charcoal

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

t_{1/2}=\frac{0.693}{k}

where,

t_{1/2} = half life of the reaction = 5715 years

Putting values in above equation, we get:

k=\frac{0.693}{5715yrs}=1.21\times 10^{-4}yrs^{-1}

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant  = 1.21\times 10^{-4}yr^{-1}

t = time taken for decay process = ? yr

[A_o] = initial amount of the sample = 100 grams

[A] = amount left after decay process =  13 grams

Putting values in above equation, we get:

1.21\times 10^{-4}=\frac{2.303}{t}\log\frac{100}{13}\\\\t=16864.4yrs

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8 0
3 years ago
What is the 45 element on the periodic table
marissa [1.9K]

Rhodium. FYI google it lol would have been faster

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3 years ago
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A 1.800-g sample of solid phenol (C6H5OH(s)) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/?C. The temp
vichka [17]

Answer:

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Explanation:

C_6H_5OH(s)+7O_2(g)\rightarrow 6CO_2(g)+3H_2O(g)

Heat capacity of calorimeter = C = 11.66 kJ/°C

Initial temperature of the calorimeter = T_1= 21.36^oC

Final temperature of the calorimeter = T_2= 26.37^oC

Heat absorbed by calorimeter = Q

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Heat of combustion per gram of phenol:

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Second, multiply moles of Au by Avogrado's number:
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4 0
4 years ago
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