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SIZIF [17.4K]
3 years ago
6

What's 1.02 x 10^2 in standard notation?

Chemistry
1 answer:
tekilochka [14]3 years ago
6 0

Because the exponent in the 10s term is positive move the decimal point 4 places to the right:
1.2 ×104 =12,000
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Parents pass characteristics such as hair color, nose shape, and skin color to their offspring. Not all of the parents' characteristics will appear in the offspring, but the characteristics that are more likely to appear can be predicted.
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Why does galium melt
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3 years ago
What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4
Gemiola [76]

Answer: The empirical formula is CaS

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of Ca= 55.6 g

Mass of S = 44.4 g  

Step 1 : convert given masses into moles.

Moles of Ca =\frac{\text{ given mass of Ca}}{\text{ molar mass of Ca}}= \frac{55.6g}{40.08g/mole}=1.38moles

Moles of S =\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{44.4g}{32.06g/mole}=1.38moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Ca = \frac{1.38}{1.38}=1

For S = \frac{1.38}{1.38}=1  

The ratio of Ca : S =  1:1  

Hence the empirical formula is CaS

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3 years ago
Everything in the world is made of matter except you??<br><br> TrueFalse
katen-ka-za [31]

Answer:

False.

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8 0
2 years ago
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