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Bess [88]
3 years ago
12

50 POINTS WILL GIVE BRAINLYEST!!!!!!!!!

Chemistry
2 answers:
alina1380 [7]3 years ago
6 0

Answer:

true

Explanation:

Heat travels from the hot cocoa in the cup to your hands. No energy is transferred. Heat is transferred from your hands to the hot cocoa in the cup.

Juli2301 [7.4K]3 years ago
6 0

Answer: the answer is true

Explanation: brainlest please

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37.2 liters of a gas has a pressure of 362.43 kPa at 46.5 °C. If the pressure increases to
Nataliya [291]

Answer:

Option A. 25.7 L.

Explanation:

Step 1:

Data obtained from the question. This include the following:

Initial volume (V1) = 37.2 L

Initial pressure (P1) = 362.43 kPa

Initial temperature (T1) = 46.5 °C

Final pressure (P2) = 693.9 kPa

Final temperature (T2) = 149.2 °C

Final volume (V2) =.?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

This can be achieved as shown below:

Temperature (K) = Temperature (°C) + 273

T (K) = T (°C) + 273

Initial temperature (T1) = 46.5 °C

Initial temperature (T1) = 46.5 °C + 273 = 319.5 K.

Final temperature (T2) = 149.2 °C

Final temperature (T2) = 149.2 °C + 273 = 422.2 K.

Step 3:

Determination of the new volume.

This can be obtained by using the general gas equation as shown below:

Initial volume (V1) = 37.2 L

Initial pressure (P1) = 362.43 kPa

Initial temperature (T1) = 319.5 K

Final pressure (P2) = 693.9 kPa

Final temperature (T2) = 422.2 K

Final volume (V2) =.?

P1V1/T1 = P2V2/T2

362.43×37.2/319.5 = 693.9 × V2/422.2

Cross multiply

319.5×693.9×V2 = 362.43×37.2×422.2

Divide both side by 319.5 × 693.9

V2 = (362.43×37.2×422.2)/(319.5×693.9)

V2 = 25.7 L

Therefore, the new volume is 25.7 L.

8 0
4 years ago
I need to know “ The carbon atom that has the chlorine atone has an optical activity “
katrin2010 [14]

Answer: R

Explanation: is polarized to the right

3 0
3 years ago
If the gas in the piston above has a volume of 20.0 L at a temperature of 25 C what is the volume of that gas when it is heated
dexar [7]

Answer:

15.98 L

Explanation:

First, you need to find T1, T2, V1 and V2.

T1 = 25 C = 298.15 K (25C + 273.15K)

T2 = 100 C = 373.15 K (100C + 273.15K)

V1 = 20. L

V2 = ? (we are trying to find)

Next, rearrange to fit the formula

V2 = V1 x T1 / T2

Next, fill in with our numbers

V2 = 20. L x 298.15 K / 373.15 K

Do the math and you should get...

15.98 L

- If you need more help or futher explanation please let me know. I would be glad to help!

8 0
3 years ago
Read 2 more answers
You have performed a serial dilution of an unknown sample and counted 73 CFU on a countable plate that was marked as a 10^-4 dil
dexar [7]

Hey there!:

To find the original sample population density, divide the conted colonies by the dilution factor and the inoculate:

= 73 / (10⁻⁴ * 0.1)

= 73*10⁵

Thus, the original sample's population density was 7.3*10⁶ or 73* 10⁵.

Hope this helps!

4 0
3 years ago
16. A formula unit indicates the simplest unit of a(n)
antiseptic1488 [7]
Non polarcompound I think so
7 0
3 years ago
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