<span>In a nuclear reaction, mass is converted to energy according to the famous relation E = mc^2
So the best answer is :
</span><span>C. During a chemical reaction, some of the mass of the reactants is converted to energy.</span>
Answer:
In 1897, the British physicist J. J. Thomson (1856–1940) proved that atoms were not the most basic form of matter. He demonstrated that cathode rays could be deflected, or bent, by magnetic or electric fields, which indicated that cathode rays consist of charged particles (Figure 2.2.2 ). More important, by measuring the extent of the deflection of the cathode rays in magnetic or electric fields of various strengths, Thomson was able to calculate the mass-to-charge ratio of the particles. These particles were emitted by the negatively charged cathode and repelled by the negative terminal of an electric field. Because like charges repel each other and opposite charges attract, Thomson concluded that the particles had a net negative charge; these particles are now called electrons. Most relevant to the field of chemistry, Thomson found that the mass-to-charge ratio of cathode rays is independent of the nature of the metal electrodes or the gas, which suggested that electrons were fundamental components of all atoms.
Explanation:
Answer:
29.88 g/mol
Explanation:
Lithium has molar mass of 6.94 g/mol and oxygen has weight of 16 g/mol. Since there are 2 lithium, Li would be 13.88 g/mol and 13.88+16=29.88 g/mol
According to <em>Prosen and Rossini, 1945</em>,
the standard heat of combustion of isooctane is -5461.3 kJ/mol. The negative sign is just to depict that there was a release of energy. Thus, to
produce 100 kJ energy,
100 kJ ÷ 5461.3 kJ/mol isooctane = 0.0183 moles isooctane.
0.0183 moles of isooctane must be burned.
I hope I was able to answer your question <span>J</span>