2 km since they walked 5km but then walked back 3km so it would be 5 - 3 = 2
Answer:
mass of chlorine = 10.4 grams
Explanation:
Mass of the solution = 5.20 × 10⁶ g
ppm chlorine by mass = 2.00
Recall that:
mass of chlorine = 5.20 × 2.0
mass of chlorine = 10.4 grams
- log (1.5 x 10^-3) = pOH = 2.824
<span>14 - 2.824 = pH = 11.176 </span>
<span>10 ^ (-11.176) = [H3O+] = 6.668 x 10^-12</span>
Answer:
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Explanation:
It is about a modern method of multiple tones in which each tone has its own meaning given to alert the residents of the impending danger – during its occurrence – and its elimination. • The means of warning: 1) Fixed and mobile Warning sirens. 2) Loudspeakers.
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Answer:
The alpha particles that were fired at the gold foil were positively charged. ... These experiments led Rutherford to describe the atom as containing mostly empty space, with a very small, dense, positively charged nucleus at the center, which contained most of the mass of the atom, with the electrons orbiting the nucleus.