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algol13
2 years ago
9

Round the mmHg readings to the nearest whole number. Round the kPa readings to the nearest tenth. Round the atm readings to the

nearest hundredth. Convert a pressure of 1.76 atm to _____ torr.
Chemistry
1 answer:
Eva8 [605]2 years ago
6 0

i love jesus and i love my mommy

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Reactant A contains 40 J of energy, and Reactant B contains 33.5 J of energy. The reactants combine to form product AB, which co
Wittaler [7]

Answer:

A

Explanation:

Energy is absorbed because the product has more energy than the reactants have.

8 0
3 years ago
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
The temperature of 170 g of a material decreases by 20.0⁰C when it loses 3050 J of heat. What is its specific heat
qaws [65]

Answer:

0.897 J/g.⁰C

Explanation:

Given the following data:

m = 170 g (mass)

ΔT = 20.0⁰C (change in temperature)

q = 3050 J (amount of heat)

The amount of heat (q) is calculated as follows:

q = m x Cp x ΔT

Thus, we introduce the data in the mathematical expression to calculate the specific heat (Cp):

Cp = q/(m x ΔT) = 3050 J/(170 g x 20.0⁰C) = 0.897 J/g.⁰C

8 0
3 years ago
What is the wave speed <br>a wave with a wave length of 1000 m and a frequancy of 3000000 Hz ​
Alla [95]

Answer:

v = 3,000,000,000 m/s

Explanation:

v = f *L

v = 3,000,000 * 1000

v = 3,000,000,000 m/s

7 0
3 years ago
Question 3 (2 points)
Mademuasel [1]

Answer:sksk

Explanation:sksk

4 0
3 years ago
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