M = 1,29kg=1290g
V = 2L = 2000mL
d = m / V = 1290g / 2000mL = 0,645 g/mL
<span>That the glassware contains no residual chemicals that will alter the results of an experiment.</span>
Answer:
molar mass = 16.03 g/mol.
Yes, the mentioned gas is methane.
Explanation:
- We can use the general law of ideal gas: <em>PV = nRT</em>.
where, P is the pressure of the gas in atm (P = 1.0 atm, at STP).
V is the volume of the gas in L (V = 2.0 L).
n is the no. of moles of the gas in mol (n = ??? mol).
R is the general gas constant (R = 0.0821 L.atm/mol.K),
T is the temperature of the gas in K (T = 273 K, at STP).
∴ n = PV/RT = (1.0 atm)(2.0 L)/(0.0821 L.atm/mol.K)(273 K) = 0.08923 mol.
∵ n = mass/molar mass
<em>∴ molar mass = mass/n</em> = (1.43 g)/(0.08923 mol) = <em>16.03 g/mol.</em>
∵ molar mass of methane (CH₄) = 16.0 g/mol.
<em>So, the mentioned gas is methane.</em>
<u>Answer:</u> The percent ionization of HA is 0.13 %
<u>Explanation:</u>
We are given:
Molarity of HA solution = 0.10 M
The chemical equation for the ionization of HA follows:
<u>Initial:</u> 0.1
<u>At eqllm:</u> (0.1-x) x x
The expression of for above equation follows:
We are given:
Putting values in above equation, we get:
Neglecting the negative value of 'x' because concentration cannot be negative.
To calculate the percent ionization, we use the equation:
Putting values in above equation, we get:
Hence, the percent ionization of HA is 0.13 %
The impact of a higher atmospheric carbon dioxide concentration on Earth's surface temperature has been the subject of numerous theoretical calculations1,2.
- Estimates of the rise in Earth's surface temperature brought on by doubling the amount of carbon dioxide in the atmosphere typically fall between 0.7 and 2.9 °C. The temperature rises range from 0.096 to 0.40 °C for a 10% increase in carbon dioxide.
- All of these conclusions were reached through the use of theoretical models, ranging in complexity from one-dimensional investigations of the planetary radiation budget to three-dimensional general circulation models.
- Here, a novel solution to this issue is discussed, enabling the calculation of an empirical estimate of the heating of the Earth's surface caused by the greenhouse effect of carbon dioxide.
This method suggests that the Earth only warmed by 0.40 °C or less between 1880 and 1970.
Learn more about green house effect here:
brainly.com/question/19521661
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