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Ratling [72]
4 years ago
7

why do we heat the test tube in a glass beaker during a chemistry experiment and not directly over a flame?

Chemistry
1 answer:
bearhunter [10]4 years ago
7 0
It is not directly over a flame because it depends on the substance you might not want to heat it too much.you never know what could happen
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Which plate, oceanic or continental, must be more dense?
musickatia [10]

Answer:

Oceanic & Continental Plates

The oceanic plate is denser and sinks due to its lower buoyancy. It's sucked into the asthenosphere and is melted deeper into the Earth, called a subduction zone. The continental plate is less dense and floats over the top of it since it is more buoyant

4 0
3 years ago
Can someone help pls
zysi [14]
What is the problem u need help with
3 0
3 years ago
A sample of nitrogen gas has a mass of 48.6 grams. How many N2 molecules are there in the sample? molecules Submit Answer &
marysya [2.9K]

Answer:

There are 1.05  x 10²⁴ molecules in 48.6 g N₂

Explanation:

1 mol of N₂ has a mass of (14 g * 2) 28 g.

Then, 48.6 g of N₂ will be equal to (48.6 g *(1 mol/ 28 g)) 1.74 mol.

Since there are 6.022 x 10²³ molecules in 1 mol N₂, there will be

(1.74 mol *( 6.022 x 10²³ / 1 mol)) 1.05  x 10²⁴ molecules in 1.74 mol N₂ (or 48. 6 g N₂).

6 0
3 years ago
7 Which physical characteristic of a solution may
Nuetrik [128]

Answer:

2= its color

Explanation:

Transition elements are present in the middle of periodic table. These are d-block elements.

These are 38 elements.

All transition elements have partially filled d orbitals.

They showed color in compound because of d-d transition.

During the d-d transition electron absorbed the energy and emit the reminder energy. The emission is usually in the form of color light.

The color of ion is complementary to the absorbed color.

The transition elements are used as a catalyst in industries such as polymer, petroleum industries.

They are ductile, conduct heat and electricity.

5 0
3 years ago
Um can someone just help me with the first question so I have an idea of what to do...please
Mice21 [21]

<em><u>look at the clues by it and try not to trust the links they trying to give u...</u></em>

<em><u>but i kinda dont know myself  any periodic table i can look at?</u></em>

4 0
3 years ago
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