From Ohm's law, we get the general equation that would relate the voltage, current, and resistance,
V = I x R
where V is voltage, R is resistance, and I is current. Deriving the equation for R
R = V / I
R = (1.5 volts) / (0.7 amps) = 2.14 Ohms
It will sink because it is heavier than the water.
From other sources, the given mass of the solute that is being dissolved here is 7.15 g Na2CO3 - 10H2O. We use this amount to convert it to moles of Na2CO3 by converting it to moles using the molar mass then relating the ratio of the unhydrated salt with the number of water molecules. And by the dissociation of the unhydrated salt in the solution, we can calculate the moles of Na+ ions that are present in the solution.
Na2CO3 = 2Na+ + CO3^2-
7.15 g Na2CO3 - 10H2O (1 mol / 402.9319 g) (1 mol Na2CO3 / 1 mol Na2CO3 - 10H2O) ( 1 mol Na2CO3 / 1 mol Na2CO3-10H2O ) ( 2 mol Na+ / 1 mol Na2CO3) = 0.04 mol Na+ ions present
System to surroundings since energy is released in an exothermic reaction
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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