3 years ago

Radio communications are frequently used in emergencies because

Chemistry

1 answer:

Korvikt [17]3 years ago

5 0

Answer:

they operate on waves

Explanation:

You might be interested in

What happens when a glass rod is dipped in HCl and is brought near ammonia gas?

seropon [69]

We get white fumes of Amonium Chloride.
HCL + NH3 gives NH4CL + H2

6 0

3 years ago

Extremely lost... the world is cold. Plz help

blagie [28]

Answer:

um to small

Explanation:

to small! TO small1

7 0

3 years ago

No. 65, chemistry help<br> Thank you

dexar [7]

Remember the acronym "Oil Rig". Oxidation is loss, Reduction is gain of electrons. Calcium is losing electrons so it's an oxidation reaction.

7 0

3 years ago

The air inside a hot-air balloon is heated to 59.00 °C (Tinitial) and then cools to 39.00 °C (Tfinal). By what percentage does t

Mama L [17]

Answer:

6.1%

Explanation:

Assuming pressure inside balloon remains constant during the temperature change.

Therefore, as per Charles' law at constant pressure,

$\frac{V_1}{T_1} =\frac{V_2}{T_2}$

$T_2=39\°\ C=39+273=312\ K$

$T_1=59°\ C=273+59=332\ K$

$V_2=V_1\times \frac{T_2}{T_1} \\=V_1\times\frac{312}{332}\\=0.939V_1$

Percentage change in volume

$\%\ change\ in\ volume=\frac{V_1-0.939V_1}{V_1} \times 100\\=6.1\%$

Change in volume of the balloon is 6.1%

4 0

3 years ago

Using the phase diagram for CO2, what phase is carbon dioxide in at -20°C

djyliett [7]

Answer:

A. It is in the gas phase.

Explanation:

it was correct on ap3x :)

5 0

3 years ago