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4 years ago

Which of the following is a homogeneous mixture of two or more pure substances?

Chemistry

2 answers:

hammer [34]4 years ago

4 0

Answer:

Option b, Tea

Explanation:

Tea is a homogeneous mixture of tea extract, milk, sugar and water. Tea extract, milk and sugar are water soluble and hence, make a homogeneous mixture.

Homogeneous mixture is a mixture of two or more components having same proportions of components through out the sample.

Mercury is an element not a mixture.

Water is a compound. Compound is formed by two or more element chemically bonded to each other. It is a pure substance not a mixture.

Similarly, alcohol is also a compound not a mixture,

So, among the given options, tea is a homogeneous mixture.

lukranit [14]4 years ago

3 0

Mercury is a homogenous mixture of two or more pure substances

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If carbon-15 has a half-life of 2.5 seconds, % of the sample would still be

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Answer:

After 5 second 25% C-15 will remain.

Explanation:

Given data:

Half life of C-15 = 2.5 sec

Original amount = 100%

Sample remain after 5 sec = ?

Solution:

Number of half lives = T elapsed / half life

Number of half lives = 5 sec / 2.5 sec

Number of half lives = 2

At time zero = 100%

At first half life = 100%/2 = 50%

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4 years ago

A 37.2-g sample of lead (Pb) pellets at 20Â°C is mixed with a 62.7-g sample of lead pellets at the same temperature. What are th

Vesnalui [34]

Answer:

Mass of sample is 99.9 g, density of ample is 11.35 $g/cm^{3}$ and temperature of sample is $20^{0}\textrm{C}$

Explanation:

Mass is an additive property. Therefore mass of combined sample is summation of masses of two pellets.

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