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3 years ago

Compared to orange light, violet light

Chemistry

1 answer:

natulia [17]3 years ago

5 0

Answer:

i think it was lll,lV ㄸㄸㅇㅊㅎㅍㅋ

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The reaction type represented by AB ---> A + B is known as

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A. synthesis

Explanation:

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3 years ago

How many valence electrons does strontium (Sr) have?

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Two valence electrons

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3 years ago

Sodium electron configuration

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1s² 2s² 2p⁶ 3s¹

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[Ne] 3s¹

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4 years ago

A chemical reaction is occurring inside a beaker and the temperature of the beaker is monitored. What would the contents of the

Archy [21]

Answer:

The system is the Answer

Explanation:

System is the region which is taken into consideration.

While we perform a chemical reaction the system is the substance taken in the container.

So, A thermodynamic system is the amount of matter or the region in universe which is under the study.

The region outside the beaker are called as surroundings.

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3 years ago

How many liters of h2 gas, collected over water at an atmospheric pressure of 752 mmhg and a temperature of 21.0°c, can be made

Shalnov [3]

The answer is V = 0.6 L

The explanation:

1- First we will get P (H) :

p (H) = p total - p (H2O)

= 752 mmHg - 18.65 mmHg

= 733 mmHg

= 733 mmHg X (1 atm / 760 atm) = 0.964 atm

2- then when the reaction equation is:

Zn(s)+2HCl(aq) -> H2(g)+ZnCl2(aq)

so, then 1 mole of Zn will produce 1 mole of H2.

so, we need to get first the mole of Zn:

mole Zn = mass / molar mass

= 1.566g / 65.38g/mol

= 0.02395mol

∴ 0.02395 mol of Zn will produce 0.02395 mol of H2

by using the ideal gas equation we can get the volume V :

when :

PV = nRT

when T is the temperature = 21 + 273 = 294 K

and R is the ideal gas constant = 0.0821 L atm /K mol

and n is the number of moles = 0.2395 mol

and P is the pressure = 0.964 atm

so, by substitution:

V = (0.02395 moles H2)(0.0821 L atm / K mole)(294 K) / (0.964 atm)

= 0.6 L

3 0

3 years ago

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