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Brut [27]
4 years ago
11

Jodie has an unknown substance in a cup. She placed a thermometer in the cup and collected the data shown in the pictures

Chemistry
2 answers:
love history [14]4 years ago
5 0

Answer:A, heat was somehow removed from the substance

Explanation:

Leto [7]4 years ago
3 0

Answer:

heat was somehow removed from the substance

Explanation:

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What is the pressure of 0.33 moles of nitrogen gas, if its volume is 15.0 L at –25.0oC?
musickatia [10]

Using the ideal gas law PV =nRTPV=nRT , we find that the pressure will be P =\frac{nRT}{V}P=

V

nRT

​

 . Then, we'll substitute and find the pressure, using T = -25 °C = 248.15 K and R = 0.0821 \frac{atm\cdot L}{mol \cdot K}

mol⋅K

atm⋅L

​

 :

P =\frac{nRT}{V} = \frac{(0.33\,\cancel{mol})(0.0821\frac{atm\cdot \cancel{L}}{\cancel{mol \cdot K}})(248.15\,\cancel{K})}{15.0\,\cancel{L}} = 0.4482\,atmP=

V

nRT

​

=

15.0

L

​

(0.33

mol

)(0.0821

mol⋅K

atm⋅

L

​

​

)(248.15

K

​

)

​

=0.4482atm

In conclusion, the pressure of this gas is P=0.4482 atm.

Reference:

Chang, R. (2010). Chemistry. McGraw-Hill, New York.

3 0
2 years ago
How do the internal structures of vascular and plants transport food and water.
mariarad [96]
All vascular plants have vascular tissue which allows the transport of water, nutrients and food between the ground and the body of the plant. So your answer would be that the internal structures of vascular plants transport food and water through their vascular tissue. Hope this helps!<span />
4 0
4 years ago
Read 2 more answers
16. The exothermic reaction between liquid hydrazine (N,H) and liquid hydrogen peroxide is used to
Xelga [282]

Answer and Explanation:

N2H2 + H2O2 = N2 + 2 H2O  2.7747 moles of HOOH (hydrogen peroxide)=5.5494 moles of H2O  

7 0
3 years ago
Atoms of which of the following elements are largest?<br> A:<br> Na<br> OOOO
elena-14-01-66 [18.8K]

Answer:

yes answer os Na because it's electronic configuration is 1s^2,2s^2,2p^6,3s^1

5 0
3 years ago
In the following reaction, how many liters of oxygen will react with 270 liters of ethene (C2H4) at STP?
lawyer [7]
According to the equation you have 1 mole of C2H4 and 3 moles of O2.

1 • (22.4L / 270L) = 3 • (22.4L / x)

1/270L = 3/x

x = 3(270) / 1

x = 810 L

810 Liters of oxygen will react with 270 liters of ethene (C2H4) at STP
4 0
3 years ago
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