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Ksju [112]
3 years ago
9

Given 1 cm3 = 1 mL A box has dimensions 2.0 cm x 4.0 cm x 8.0 cm.

Chemistry
1 answer:
svp [43]3 years ago
5 0

Answer: 64

Explanation:

you just multiple the 3 numbers to get the answer (i’m in chemistry and just did this question lol)

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The radioactive substance cesium-137 has a half-life of 30 years. The amount At (in grams) of a sample of cesium-137 remaining a
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<u>Answer:</u> The amount of sample left after 20 years is 288.522 g and after 50 years is 144.26 g

<u>Explanation:</u>

We are given a function that calculates the amount of sample remaining after 't' years, which is:

A_t(t)=458\times (\frac{1}{2})^{\frac{t}{30}

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A_t(t)=458\times (\frac{1}{2})^{\frac{20}{30}

A_t(t)=288.522g

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  • <u>For t = 50 years</u>

Putting values in above equation:

A_t(t)=458\times (\frac{1}{2})^{\frac{50}{30}

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The element which can not loose electron easily and having electronagtive character is called non-metal it has following property-

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Determining the pH of substances such as purple grape juice and catsup using test strips can be difficult. Why?

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pH meters for these substances, measure the total acidity of the sample and convert it into tartaric acid concentration; The test strips are a qualitative method of measurement and their result can give different opinions.

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5.0 moles/10L = 0.5 M


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