<span>4.5x10^22
Because there are 6.022x10^23 atoms per mole; therefore,
(6.022x10^23*(0.075)=04.5x10^22 atoms of titanium.</span>
A. good conductors is not a characteristic of metals out of all the other followings.
The balanced chemical reaction for the complete neutralization between HNO₃ and Ba(OH)₂ is given as,
2 HNO₃ (aq) + Ba(OH)₂ (aq) → Ba(NO₃)₂ + 2 H₂O
Balanced equations
In order to balance the equation, the component atoms in the reactants and products must be the same in terms of number and mass.
Thus, in the above chemical equation, the number atoms of H, N, O, and Ba in the reactants and the products must be equal.
Therefore, the overall equation for the chemical reaction is,
2 HNO₃ (aq) + Ba(OH)₂ (aq) → Ba(NO₃)₂ + 2 H₂O
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B. the amount of heat required to increase the temperature of 1 gram by 1oC
Making repeated separations of the various substances in the pitchblende, Marie and Pierre used the Curie electrometer to identify the most radioactive fractions. They thus discovered that two fractions, one containing mostly bismuth and the other containing mostly barium, were strongly radioactive.
<h3>What was surprising about pitchblende?</h3>
Since it was no longer appropriate to call them “uranic rays,” Marie proposed a new name: “radioactivity.”
Even more surprising, Marie next found that a uranium ore called pitchblende contained two powerfully radioactive new elements: polonium, which she named for her native Poland, and radium.
<h3>Why is radium more radioactive than uranium?</h3>
It is 2.7 million times more radioactive than the same molar amount of natural uranium (mostly uranium-238), due to its proportionally shorter half-life.
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