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nataly862011 [7]
4 years ago
7

Which of these are not true statements a compound?

Chemistry
1 answer:
kompoz [17]4 years ago
5 0

Answer:

A compound can have more than one chemical formula and still be considered the same compound.

Explanation:

<em>Which of these are not true statements a compound? </em>

<em>A compound's properties are usually not the same as the properties of the elements that make it up.</em>  TRUE. For instance, the salt NaCl has different properties than the solid metal Na and the gaseous nonmetal Cl₂.

<em>A compound always has the same composition.</em>  TRUE. The ratio of elements in a compound is constant.

<em>A compound is made up of more than one type of atom.</em>  TRUE. Unlike elements, compounds are formed by 2 or more elements.

<em>A compound can have more than one chemical formula and still be considered the same compound.</em> FALSE. Each compound can have only one chemical formula.

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a solution k is saturated at 33 g solute in 100g solvent if a 50g solute is added to 200g solvent solution k is​
Alenkinab [10]

Answer:

33 100gc50 is a 100

Explanation:

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3 years ago
A voltaic cell is constructed from an Ni2+(aq)−Ni(s) half-cell and an Ag+(aq)−Ag(s) half-cell. The initial concentration of Ni2+
SCORPION-xisa [38]

Explanation:

For what I can see, is missing the concentration of [Ag+] in the half-cell. To calculate it:

Niquel half-cell

Oxidation reaction: Ni \longrightarrow Ni^{2+}+2 e^-

E=E^0 - \frac{R*T}{n*F}*ln(1/[Ni^{2+}])

Assuming T=298 K / R=8.314 J/mol K / F=96500 C

E=-0.23V - \frac{8.314*298}{2*96500}*ln(1/0.014M)

E=-0.285V

Silver half-cell

Reduction reaction: Ag^+ + e^- \longrightarrow Ag

E=E^0 - \frac{R*T}{n*F}*ln(1/[Ag+])

E_{cell}=E_{red} - E_{ox}

E_{red}=1.12 V + (-0.855V)=0.835V

Assuming T=298 K / R=8.314 J/mol K / F=96500 C

0.835V=0.8V - \frac{8.314*298}{1*96500}*ln(1/[Ag+])

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3 0
4 years ago
Slope is rise/run. Into this graph (mass vs volume), what does the slope represent?
umka2103 [35]

Answer:

mass/volume

Explanation:

The slope is rise over run, or y over x.  The mass is y on this graph, and the volume is x on this graph.  The slope represents mass over volume.

8 0
3 years ago
Read 2 more answers
Consider the nuclear equation below. Superscript 235 subscript 92 upper U right arrow superscript 4 subscript 2 upper H e. What
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Answer: The nuclide symbol of X is ^{231}_{90}\textrm{Th}

Explanation:

The given nuclear reaction is a type of alpha decay process. In this process, the nucleus decays by releasing an alpha particle. The mass number of the nucleus is reduced by 4 units and atomic number is also decreased by 2 units. The particle released is a helium nucleus.

The general equation representing alpha decay process is:

_{Z}^{A}\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\textrm{He}

For the given equation :

^{235}_{92}\textrm{U}\rightarrow ^{A}_{Z}\textrm{X}+^4_2\textrm{He}

As the atomic number and mass number must be equal on both sides of the nuclear equation:

^{235}_{92}\textrm{U}\rightarrow ^{231}_{90}\textrm{Th}+^4_2\textrm{He}

Thus the nuclide symbol of X is ^{231}_{90}\textrm{Th}

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4 years ago
What mass of H2SO, is required to react completely with 50.0 grams of ammonia (NH3)?​
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