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netineya [11]
3 years ago
13

Stars form inside giant clouds of gas and dust. What are these giant clouds of gas and dust called?

Chemistry
2 answers:
Nataliya [291]3 years ago
7 0

Answer:

D

Explanation:

I'd put D for my answer

lesya [120]3 years ago
3 0
They are called nebulas
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Which unit abbreviation is a measurement of force?
Artemon [7]
So,

Recall Newton's Second Law of Motion: force = mass x acceleration

Also recall:

acceleration = velocity/time
velocity = distance/time

Distance is expressed in meters.
Time is expressed in seconds.
Mass is expressed in kilograms.

v = m/s
a = m/s^2
F = m * a
F = kg * m/s^2

F= \frac{kg*m}{s^2}

The unit for force is the Newton (N).
4 0
3 years ago
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Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodi
Mumz [18]
<span>The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion. hope this helps</span>
6 0
3 years ago
What is the mass in grams of 0.687 moles of NH three
stepan [7]
NH3 = 14 +3*1=17 g/mol
Mass = mol * molar mass = 0.687 * 17= 11.679 g
Can u mark it brainliest?
3 0
3 years ago
What is the name for a substance made of billions of oppositely charged ions<br> joined together?
bija089 [108]

Answer:

Ionic substance

Explanation:

An ionic substance is formed when oppositely charged ions link up to form an infinitely large lattice structure that can only be described in terms of unit cells.

Ionic substances may consist of billions of oppositely charged ions. Ionic substances are hard, have high melting and boiling points and do not conduct electricity in the solid state because the ions are not free in the solid state.

However, in solution or molten state, the substance conducts electricity since the ions which are the charge carriers are now mobile.

8 0
3 years ago
How much heat is absorbed when 63.7 g H2O(l) at 100 degrees Celsius and 101.3kPa is converted to steam at 100
Alona [7]

Answer:

Q = 143,921 J = 143.9 kJ.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the absorbed heat by considering this is a process involving sensible heat associated to the vaporization of water, which is isothermic and isobaric; and thus, the heat of vaporization of water, with a value of about 2259.36 J/g, is used as shown below:

Q=m*\Delta _{vap}H

Thus, we plug in the mass and the aforementioned heat of vaporization of water to obtain the following:

Q=63.7g*2259.36J/g\\\\Q=143,921J=143.9kJ

Regards!

3 0
3 years ago
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