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3 years ago

8

A helium balloon with an internal pressure of 1.25 atm and a volume of 3.50 L at 25.00 C

1 answer:

Advocard [28]3 years ago

6 0

Using the combined gas law ((P1•V1)/T1) = ((P2•V2)/T2), you get ((1.25atm•3.5L)/298K) = ((0.800atm•V2)/243K). Solving for V2 you get 4.46L.

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Draw the product that is formed when the compound shown below is treated with an excess of hydrogen gas and a platinum catalyst.

loris [4]

<span>When the hexene is treated with an excess of hydrogen gas and a platinum catalyst, the product formed is hexane.

Hexene is an unsaturated hydrocarbon. Hexene when treated with H2 gas, in presence with Pt catalyst, the double bond is broken. This results in generation of saturated hydrocarbon i.e. hexane. </span>

5 0

3 years ago

A 5.00-g sample of copper metal at 25.0 °C is heated by the addition of 133 J of energy. The final temperature of the copper is

vekshin1

<u>Answer:</u> The final temperature of the copper is 95°C.

<u>Explanation:</u>

To calculate the final temperature for the given amount of heat absorbed, we use the equation:

$Q= m\times c\times \Delta T$

Q = heat absorbed = +133 J (heat is added to the system)

m = mass of copper = 5.00 g

c = specific heat capacity of copper = 0.38 J/g ° C

$\Delta T={\text{Change in temperature}}=T_2-T_1$

$T_1=25^oC$

Putting values in above equation, we get:

$+133J=5.00g\times 0.38J/g^oC\times (T_2-25)\\\\T_2=95^oC$

Hence, the final temperature of the copper is 95°C.

3 0

3 years ago

As a mixed two substance in a test tube she noticed that the test tube because warm she also noticed gas coming from the test tu

lesya [120]

That is convection my friend

4 0

2 years ago

Read 2 more answers

KBr + AgNO3 → AgBr + KNO3<br><br><br> Which two chemicals are products in the chemical reaction?

iragen [17]

Answer:

Products are AgBr and KNO3

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3 years ago

What is the pH of a 2.10 x 10⁻⁶ M solution of HCl?<br>

Delvig [45]

Answer:

pH = 5.7

Explanation:

pH = -log[H^+]

For HCl pH = -log[HCl] = - log [2.10 x 10⁻⁶ ] = 5.7

5 0

3 years ago