Given that acids burns and the reactions of some metals with acids are violent, you have to protect agains spills and splashes that can seriously harm you: your eyes, your hands, your arms, your feet, even your clothe.
So you shall use:
- Safety glasses (googles)
- Chemical gloves
- Lab coat
- Closed shoes
Answer:
b. has a low specific heat capacity.
Explanation:
Hello,
In this case, since the specific heat is defined as the heat required to increase or decrease 1 degree Celsius 1 gram or mole of a specific substance, we infer that the lower the specific heat, the less energy will be needed for such increase or decrease, therefore, it turns out easier to modify the temperature in a substance that b. has a low specific heat capacity.
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A combustion reaction is when a fuel, usually a hydrocarbon, reacts with excess oxygen to form carbon dioxide gas and water vapor.
<u>Answer:</u> The percentage abundance of isotope is 69 %.
<u>Explanation:</u>
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Let the fractional abundance of isotope be 'x'
- <u>For isotope:</u>
Mass of isotope = 62.93 amu
Fractional abundance of isotope = x
- <u>For isotope:</u>
Mass of isotope = 64.93 amu
Fractional abundance of isotope = (1-x)
- Average atomic mass of copper = 63.55 amu
Putting values in above equation, we get:
Converting this fractional abundance into percentage abundance by multiplying it by 100, we get:
Hence, the percentage abundance of isotope is 69 %.
Answer: False
Explanation: In the written form of an ionic compound, the positively charged cation always comes before the negatively charged anion. For instance, the written name for is calcium chloride because the compound has calcium () cations and chloride () anions.