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san4es73 [151]
2 years ago
8

Help me┐(´ー`)┌thank you in advance ​

Chemistry
2 answers:
LenKa [72]2 years ago
8 0

<u>Answer</u>:

the law of conservation of mass is valid for all the following, except nuclear reactions.

<u>Explanation</u>:

the law of conservation of mass is valid for all the following, except nuclear reactions because some mass gets converted to energy.

liubo4ka [24]2 years ago
3 0

Answer:

Nuclear reactions

Explanation:

What's this law?

  • This law states that in any chemical reaction the mass is neither created nor destroyed ,it remains conserved
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Answer: 3.01 * 10^35

Explanation:

500,000,000,000 * 6.02 * 10^23

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What best discribes the relationship between wavelength and frequency in a electromagnetic wave
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Answer:

The higher the frequency, the shorter the wavelength

Explanation:

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Which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons?
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A stable arrangement of eight valence electrons : ³⁵Cl⁻¹

<h3>Further explanation</h3>

Chlorine is a halogen gas, located in group 17, p block

Chlorine has an atomic number of 17 and an atomic mass of 35

Electron configuration: [Ne] 3s²3p⁵

If we look at the electron configuration, then Cl will bind 1 more electron so that the configuration is stable like Argon (atomic number 18)

So by binding this one electron, chlorine forms negative ions (anions)

³⁵Cl⁻¹

B. Cl⁻² binds 2 electrons, exceeding the octet rule

C. Cl⁺¹, releases 1 electron, remains unstable

D. Cl, the neutral form of Cl, is still unstable with a 7-electron valence configuration

3 0
3 years ago
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4 0
3 years ago
0.40 L of HNO3 is titrated to equivalence using 0.18 L of 0.1 M NaOH. What is the concentration of the HNO3 ?
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This problem is providing us with the volume of nitric acid that is titrated with 0.18 L of 0.1-M sodium hydroxide and asks for the concentration of the acid. At the end, the result turns out to be 0.045M, according to the following.

<h3>Acid-base titrations:</h3>

In chemistry, acid-base titrations allow us to quantify the volume or concentration of an acid or base via the following equation:

M_AV_A=M_BV_B

Where the subscript A stands for the acid and B for the base; which means one can calculate any of the variables there by knowing the other three. This equation is based on the balanced neutralization chemical equation, which takes place between the acid and the base.

Thus, we can write the reaction between NaOH and HNO3 as:

HNO_3+NaOH\rightarrow NaNO_3+H_2O

In such a way, we can solve for the concentration of the acid as shown below:

M_A=\frac{M_BV_B}{V_A} \\\\M_A=\frac{0.1M*0.18L}{0.40L} \\\\M_A=0.045M

Learn more about titration: brainly.com/question/25485091

3 0
2 years ago
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