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avanturin [10]
4 years ago
6

How do stars recycle and process matter in the universe?

SAT
2 answers:
pickupchik [31]4 years ago
4 0

In a cyclic universe, new matter and energy are created about every trillion years when two sheet-like "branes" collide along an extra dimension of space. Branes are predicted by string theory. ... Once the universe is emptied out, a weak attractive force brings our universe's two branes together in a cosmic collision.
Anastasy [175]4 years ago
3 0
Stars forge heavy elements and return their gas to space. This material enriches gas clouds from which new stars are formed, and the cycle continues. Each generation of stars is made in part from the ashes of previous generations. The material of stars is recycled over billions of years
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2or 3 sentences expiain what happens to jobs and the salesof goods and senices during economic growth
Nat2105 [25]
Something that happens to jobs and the sales of good in a economic growth is theres better income and consumers get to consume more goods and services it usually builds up the economy and makes it become better not just economically but also for the environment.
3 0
3 years ago
A line segment of length k (in the figure) is divided into 3 equal parts. What is the distance between the midpoints of the firs
Travka [436]

Answer:

2k/3

Explanation:

5 0
3 years ago
How many grams of lead product would theoretically be produced between 17. 0 g potassium iodide, ki, and 25. 0 g of lead (ii) ni
Fantom [35]

The number of grams of lead product that would theoretically be produced from the given reaction is; <u><em>Mass of lead product = 23.6 g</em></u>

Potassium iodide reacting with Lead(II) Nitrate would yield the balanced equation;

2KI + Pb(NO₃)₂ = 2KNO₃ + PbI₂

2moles : 1 mole = 2 moles : 1 mole

From online tables;

Molar mass of KI = 166 g/mol

Molar mass of Pb(NO₃)₂ = 331.2 g/mol

We are given;

Mass of KI = 17 g

Mass of Pb(NO₃)₂ = 25 g

Thus;

Number of moles of PbI₂ yielded in order to find the limiting reactant will be;

no of moles of PbI₂ from KI = (17g/166 g/mol) × (1 mole of PbI₂/2 mol of KI)

no of moles of PbI₂ from KI = 0.0512 mols

Similarly;

no of moles of PbI₂ from Pb(NO₃)₂ = (25g/331.2 g/mol) × (1 mole of PbI₂/1 mol of Pb(NO₃)₂)

no of moles of PbI₂ from Pb(NO₃)₂ = 0.0755 moles

We can see that KI produced the least amount of moles. Thus;

Mass = 0.0512 * molar mass of  PbI₂

From tables, molar mass of  PbI₂ = 461 g/mol

Thus;

Mass of lead product = 461 * 0.0512

Mass of lead product = 23.6 g

Read more about theoretical yield at; brainly.com/question/21091465

5 0
2 years ago
Define the electronegativity. explain the trend of electronegativity in periodic table.
Art [367]

Answer:

1. Electronegativity is the property of an atom that attracts the shared pair of an electron to itself.

2. Electronegativity increases and decrease. It increases when to you from to the side or across of a period because the number of charge in the nucleus increases. Electronegativity decreases when you move down in a group because the electrons move farther or become far from the nucleus's pull.

Explanation:

I hope it helps! Have a great day!

pan~

5 0
3 years ago
to study a rock sample geologists observe the rocks mineral composition color and tempature true or false
kakasveta [241]

hi the answer is false hope this helps

7 0
3 years ago
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