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adelina 88 [10]
3 years ago
8

Which elements are solid at room temperature

Chemistry
1 answer:
Kryger [21]3 years ago
8 0

Answer:bromine , neon , helium , argon , lithium , beryllium

Explanation:

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An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this isotope is now left. What is its
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1.25, you divide 2.5 by 80, then times by 40
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4 0
4 years ago
when methane reacts with oxygen, the products are carbon dioxide and water. How many grams of carbon dilxide are formed if 30 g
Wittaler [7]

Answer:

CH4+2O2→CO2+2H2O

Moles of oxygen=3232=1

Moles of carbon dioxide=4422=0.5

Moles of water=1818=1

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Explanation:

8g

4 0
2 years ago
A plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal
Stels [109]

Answer:

For comprehension, the question is written properly with options attached below:

plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal to the surroundings is categorized as:

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C. low density plasma

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The correct answer to the question above is "Option D (nonthermal plasma.)"

Explanation:

Plasma, for example radiant sun are state of matter made up of atoms where the ions move freely, there are composed of photons and free electrons but the positive and negative ions are equal creating a swirling gas of positive ions and negative electron and they are also good conductors of electricity as their charged particles move.

Unlike thermal plasmas that ensure their temperature is equal to their surroundings, non-thermal plasma, is not in equilibrium with its surrounding., in other words, non-thermal plasma never reaches temperature that is equal to their surroundings. They can be formed by electrifying electromagnetic waves.

6 0
4 years ago
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(03.04 MC)<br> What is the formula for sodium nitrite?<br> O NaN<br> O NaN<br> O NaNO2<br> O NaNO3
charle [14.2K]

Answer:

NaNO2 is the formula for sodium nitrite

Explanation:

Check the selected ions chart to find out more in depth.

7 0
4 years ago
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