Perform the following

Chemistry

1 answer:

Ghella [55]3 years ago

4 0

Answer:

1.85 × 10⁻⁶

Explanation:

0.0003 ÷ 162 = 1.851851852 × 10⁻⁶ ⇒ 1.85 × 10⁻⁶

Hope that helps.

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Part A. At present, automobile batteries are sealed. When lead storage batteries discharge, they produce hydrogen. Suppose the v

kondaur [170]

Answer:

Part A. 10 atm

Part B. C₆H₆

Explanation:

Part A. At present, automobile batteries are sealed. When lead storage batteries discharge, they produce hydrogen. Suppose the void volume in the battery is 100 mL at 1 atm of pressure and 25°C. What would be the pressure increase if 8 × 10⁻² g H₂ were produced by the discharge of the battery?

We can find the pressure for this amount of Hydrogen using the ideal gas equation.

$P.V=n.R.T\\P.V=\frac{m}{M} .R.T\\P=\frac{m.R.T}{M.V} =\frac{8 \times 10^{-2}g \times (0.082atm.L/mol.K) \times 298K }{(2g/mol) \times 0.1L} =10atm$

Part B. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100°C and 760 mmHg. If the empirical formula of this compound is CH, what is the molecular formula of this compound?

First, we have to look for the molar mass of the compound through the following expression:

$P.M=\rho .R.T\\M = \frac{\rho .R.T}{P} =\frac{2.550g/L \times (0.08206atm.l/mol.K) \times 373.15K }{760mmHg} .\frac{760mmHg}{1atm} =78.1g/mol$

Now, we need the relation between the molar mass of the molecular formula and the molar mass of the empirical formula.

$\frac{78.1g/mol}{13.0g/mol} =6.01 \approx 6$

Finnally, we multiply the empirical formula by this coefficient to get the molecular formula.

(CH) × 6 = C₆H₆

5 0

4 years ago

What is reacitivty series, and how you can access reactivity of metals...

lubasha [3.4K]

In Chemistry, a reactivity series of metals , also known as the activity series refers to the arrangement of metals in the descending order based upon their reactivity .

Salient Features :-

The metal at the top of the reactivity series are powerful reducing agents since they are easily oxidized.
The reducing ability of metals grows weaker while traversing down the series.
The electro-positivity of metals also reduces while moving down the reactivity series.
Metals that are placed higher on the reactivity series have the ability to displace metals that are placed lower in the series.

The metal reactivity series is given below :-

To access the reactivity of metal , from the given reactivity series identify any of the metal and locate the reactivity based upon the choice of reactivity. The metal at the top (Potassium) is most reactive and the metal at the bottom (Platinum) is the least reactive.

To learn more about metal reactivity series visit -

brainly.com/question/16072297