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4 years ago

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:

Which of these are not true statements a compound?

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

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

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

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

3 0

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

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

$[Ag+]=0.26 M$

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

Leto [7]

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:

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