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MaRussiya [10]
3 years ago
13

Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley

develop his version?
Chemistry
1 answer:
I am Lyosha [343]3 years ago
8 0

Answer:

The number of protons in an atom is different than the atom’s total mass.  

Explanation:

Mendeleev knew only that, with some anomalies, the properties of elements varied periodically with their atomic masses.

Moseley's X-ray experiments enabled him to remove these anomalies and to show that the properties of elements varied with their atomic numbers.  

Chadwick later discovered that the mass differences were caused by the presence of neutrons.

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The reaction is first order. 
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In order for a process to be spontaneous, Multiple Choice the entropy of the surroundings must increase. the entropy of the surr
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Answer:

The correct answer is entropy change of the surrounding plus the entropy change of the system must be positive.

Explanation:

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3 years ago
The mass number of an element is equal to
klasskru [66]

Answer:

The mass number is defined as the total number of protons and neutrons in an atom.

Explanation:

8 0
3 years ago
Suppose 0.981 g of iron (II) iodide is dissolved in 150. mL of a 35.0 m M aqueous solution of silver nitrate. Calculate the fina
yaroslaw [1]

Answer:

Final molarity of iodide ion C(I-) = 0.0143M

Explanation:

n = (m(FeI(2)))/(M(FeI(2))

Molar mass of FeI(3) = 55.85+(127 x 2) = 309.85g/mol

So n = 0.981/309.85 = 0.0031 mol

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n(AgNO3) = C(AgNO3) x V(solution)

= 0.035 x 0.15 = 0.00525 mol

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So, n(FeI(3)) excess = 0.00525 - 0.0031 = 0.00215mol

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Fill in the Blank
Arisa [49]

Answer: Quantitative data

Explanation:

3 0
3 years ago
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