Answer:
- <u><em>Copper atoms vibrate around fixed positions, whereas mercury atoms move around while staying close together. </em></u>
Explanation:
The <em>solid </em>state of matter is characterized by rigid crystalline structures, in which <em>atoms </em>can vibrate around a fixed position. That is why <em>solids</em> have definite shape and volume, and cannot flow. This is described in the last statement when it states <em>"Copper atoms vibrate around fixed positions"</em>
The <em>liquid </em>state of matter is characterized by the <em>atoms </em>being more separated than in<em> solids.</em> While the <em>atoms </em>in the liquid are not completely free to move, they can slide past the neighboring atoms, which gives them the property to flow. Therefore, the liquids, although they have a defined volume, take the form of the container. This is what the last statement describes as "mercury atoms move while remaining together"
Answer:
Here's what I get
Explanation:
(g) Titration curves
I can't draw two curves on the same graph, but I can draw two separate curves for you.
The graph in part (d) had an equivalence point at 20 mL.
In the second titration, the NaOH was twice as concentrated, so the volume to equivalence point would be half as much — 10 mL.
The two titration curves are below.
(h) Evidence of reaction
HCl and NaOH are both colourless.
They don't evolve a gas or form a precipitate when they react.
The student probably noticed that the Erlenmeyer flask warmed up — a sign of a chemical change.
Answer:
- <u>True</u><u> </u>
- <u>B</u><u>.</u><u> </u><u>24</u><u> </u><u>hours</u><u> </u>
- <u>Light</u><u> </u><u>and</u><u> </u><u>Dark</u><u> </u>
- <u>A</u><u>.</u><u> </u><u>To</u><u> </u><u>spin</u><u> </u><u>on</u><u> </u><u>an</u><u> </u><u>Axis</u><u> </u>
- <u>True</u><u> </u>
- <u>Nearest</u><u> </u><u>P0INTS</u><u> </u>
- <u>B</u><u>.</u><u> </u><u>365</u><u> </u><u>days</u><u> </u>
- <u>True</u><u> </u>
- <u>A</u><u>.</u><u> </u><u>January</u><u> </u>
- <u>B</u><u>.</u><u> </u><u>July</u><u> </u>
- <u>Summer</u><u> </u>
- <u>B</u><u>.</u><u> </u><u>T</u><u>he tilt of the Earth on its axis</u>
- <u>True</u><u> </u>
- <u>¿</u><u>-</u><u>¿</u>
- <u>¿</u><u>-</u><u>¿</u>
- <u>B</u><u>.</u><u> </u><u>June</u>
- <u>A</u><u>.</u><u> </u><u>September</u><u> </u>
- <u>B</u><u>.</u><u> </u><u>December</u><u> </u><u>and</u><u> </u><u>March</u><u> </u>
Explanation:
Sorry yan lang alm but I hope it helps
<h2><u>#CARRYONLEARNING</u><u> </u></h2><h2><u>#STUDYWELL</u><u> </u></h2>
Answer:
gas
Explanation:
the liquid evaporates and has heat is given to the particles, their kinetic energy increases and they bounce off one another
Answer:
The answer that apply;
Movement of galaxies
Chemical composition of the Sun.
Light and the time it takes to traverse between particular points in the universe is used to calculate the age of distant stars and galaxies. Because of the vast nature of the universe, light takes earth years for it to travel from one galaxy to another. By knowing the speed of light and the amount of time taken for the light to travel from a distant celestial body, and use of geometric calculations, and brightness measurements we can tell in approximation the age of the celestial body. The age can also star can also be determined by their composition. Youg stars are mainly found have lighter elements such as helium. As they age, they have more composition of heavier elements such as iron. This is due to the fusion at the core of the sun that fuses lighter elements to heavier elements.
The answers that apply are;
radiometric dating of rocks
fossil evidence
gradual processes of rock
Radiometric dating means the use of half-life of naturally decaying elements such as carbon-14 to tell the age of a fossil or rock. The gradual formation of rocks such as lithification of sedimentary rock or metamorphosis of rock is also used to calculate the age of the earth by studying the stage in the process in which the rocks are in and extrapolating the age using calculations.
Explanation: