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3 years ago

Styrofoam is an example of a * Conductor Radiator Insulator Con vector

Chemistry

1 answer:

PilotLPTM [1.2K]3 years ago

3 0

Answer:

Insulator

Explanation:

Styrofoam is a good insulator because the plastic foam contains billions of trapped gas bubbles.

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PLEASEEE HELPPP!!!!!!

chubhunter [2.5K]

Answer:

Explanation:

Cs has a higher rate of reaction because it's easier to remove an electron from it, thereby leading to faster reactivity

5 0

3 years ago

Read 2 more answers

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Jlenok [28]

The answer is B.

When a volcano spews out smoke and gasses, there very harmful to the atmosphere and geosphere, the gasses it spews out is, hydrogen sulfide, sulfur dioxide, carbon monoxide, and carbon dioxide.

I hope this helps!

4 0

3 years ago

How many moles of sodium hydrogen carbonate are present in 2.61 grams of this compound?

Sloan [31]

Molar mass of NaHCO_3

23+1+12+3(16)
36+48
84g/mol

Now

$\\ \sf\longrightarrow No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}$

$\\ \sf\longrightarrow No\:of\; moles=\dfrac{2.61}{84}$

$\\ \sf\longrightarrow No\:of\:moles=0.0312mol$

7 0

2 years ago

(6 points) Alice owns 20 grams of a radioactive isotope that has a half-life of ln(4) years. (a) Find an equation for the mass m

Cloud [144]

<u>Answer:</u> The equation to calculate the mass of remaining isotope is $[A]=\frac{20}{10^{-0.217t}}$

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life of the reaction = $\ln 4=1.386yrs$

Putting values in above equation, we get:

$k=\frac{0.693}{1.386yrs}=0.5yrs^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = $0.5yr^{-1}$

t = time taken for decay process

$[A_o]$ = initial amount of the sample = 20 grams

[A] = amount left after decay process = ? grams

Putting values in above equation, we get:

$0.5=\frac{2.303}{t}\log\frac{20}{[A]}$

$[A]=\frac{20}{10^{-0.217t}}$

Hence, the equation to calculate the mass of remaining isotope is $[A]=\frac{20}{10^{-0.217t}}$

6 0

3 years ago

Force that resists motion between objects in cintact

Marysya12 [62]

"Friction" I belive is the answer.

4 0

3 years ago