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oksano4ka [1.4K]
4 years ago
7

The modern periodic table is arranged by increasing

Chemistry
1 answer:
Lilit [14]4 years ago
5 0

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

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In the following reaction, how many liters of oxygen will react with 270 liters of ethene (C2H4) at STP?
lawyer [7]
According to the equation you have 1 mole of C2H4 and 3 moles of O2.

1 • (22.4L / 270L) = 3 • (22.4L / x)

1/270L = 3/x

x = 3(270) / 1

x = 810 L

810 Liters of oxygen will react with 270 liters of ethene (C2H4) at STP
4 0
3 years ago
A certain shade of blue has a frequency of 7.00 × 1014 Hz. What is the energy of exactly one photon of this light?
NeTakaya
Energy = Planck's constant * Frequency 

E = (6.62607004 × 10⁻³⁴<span>) * 7 * 10</span>¹⁴

E = 46.38 * 10⁻²⁰

E = 4.638 * 10⁻¹⁹ J

Hope this helps!
8 0
3 years ago
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Describe what constitutes Dalton's model of an atom
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The Constitution has seven parts to it it has amendments articles the Bill of Rights in the Declaration of Independence every Genia company of Charter
8 0
4 years ago
When of alanine are dissolved in of a certain mystery liquid , the freezing point of the solution is less than the freezing poin
vitfil [10]

Answer:

16.5 g

Explanation:

The van't Hoff factor is a relation between the ideal value of a solution's colligative properties and the observed colligative properties.

Check the attached files for detailed solution

7 0
4 years ago
Although Joule is the unit of energy we normally use in science, people also use the Kilocalorie and the gram calorie when descr
grigory [225]

Answer:

• 1 kilocaloric equals 1000 gram calories

• 1 kilocalorie is equals to 4184 Joules of energy.

Explanation:

One kilocalorie is equals to 1000 gram calories because one kilo is equals to or have 1000 grams. One kilocalorie is equals to 4184 Joules of energy while on the other hand, one calorie is equals to 4.184 Joules of energy because one calorie is 1000 times smaller than Kilocalorie so calorie has also 1000 times lower energy than kilocalorie. Kilo is the prefix which means 1000 so we can say that One kilocalorie is equals to 1000 gram calories.

5 0
3 years ago
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