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2 years ago

Question 5 of 10

Chemistry

2 answers:

OverLord2011 [107]2 years ago

4 0

Answer:

4.2 g

Explanation:

The VOLUME of the ring is 4.2 - 4.0 = .2 ml = .2 cm^3

the MASS of the ring is this times the density

.2 cm^3 * 21 g/cm^3 = 4.2 g

Marianna [84]2 years ago

3 0

Answer:

the answer is c

Explanation:

density is mass/volume

so mass=density × volume

but we take the change is volume that is v2-v2=4.2-4=0.2ml

but the density is in gm/cm^3 so we should convert ml into cm^3. eventually they are equal so mass=21×0.2=4.2

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3 years ago

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Explanation:

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3 years ago

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3 years ago

6. What is the wavelength (in meters) of the electromagnetic carrier wave transmitted by The Sports

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Answer:

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Explanation:

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3 years ago

For each row in the table below, decide whether the pair of elements will form a molecular or ionic compound. If they will, then

Olin [163]

Answer:

$\begin{array}{cccll}\textbf{Element 1} & \textbf{ Element 2} &\textbf{Compound?} &\textbf{Formula} &\textbf{Type}\\\text{Ar}&\text{Xe} &\text{No} &\text{None}&\text{Neither}\\\text{F}& \text{Cs} &\text{Yes} &\text{CsF} &\text{Ionic}\\\text{N} &\text{Br} &\text{Yes} & \text{NBr}_{3}&\text{molecular} \\\end{array}$

Explanation:

You look at the type of atom and their electronegativity difference.

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N/Br: Two nonmetals; ΔEN = |3.04 - 2.98| = 0.

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3 years ago