1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
skelet666 [1.2K]
4 years ago
6

How do we know stars are element factories?

Chemistry
1 answer:
djverab [1.8K]4 years ago
8 0
In a nutshell, stars are mainly made of hygrogen, element 1.

over time, elements got more dense as they collided and cooled, leading to other gases, metals...

then they explode, which lead to all kinds of further complex elements.

The stuff that makes up the universe a lot of it is from exploding star stuff, and the Earth was built up upon these remains and the atoms that make up organisms even could originally be from stars.

You might be interested in
What is 10.0056 g/mol rounded to 3 significant figures
Svetradugi [14.3K]
The answer would just be 10.0 g/mol if it is rounded to 3 significant figures.
5 0
3 years ago
What is the job of an environmental engineer?
xz_007 [3.2K]

Answer:

To keep the evinermental machinces working

Explanation:

6 0
3 years ago
What minimum volume of 0.200 m potassium iodide solution is required to completely precipitate all of the lead in 195.0 ml of a
lbvjy [14]
First, we write the reaction equation:

2KI + PbNO₃  → K₂NO₃ + PbI₂
The molar ratio of KI to PbNO₃ is 2 : 1
Moles of PbNO₃ present:
Moles = concentration (M) x volume (dm³)
= 0.194 x 0.195
= 0.038
Moles of KI required = 2 x 0.038 = 0.076 moles
concentration = moles / volume
volume = moles / concentration
= 0.076 / 0.2
= 0.38 L = 380 ml
7 0
3 years ago
Your solution has a volume of 36 ml and a mass of 970 g. what is the density of your solution
LenaWriter [7]

Answer:

The answer is

<h2>26.94 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass = 970 g

volume = 36 mL

The density of the object is

density =  \frac{970}{36}  \\ 26.944444...

We have the final answer as

<h3>26.94 g/mL</h3>

Hope this helps you

6 0
3 years ago
What four things affect the tides
S_A_V [24]
I know three
The Moon
The Wind
and Earths Rotation.

Gravity Maybe one thing but i am not sure
4 0
3 years ago
Other questions:
  • Choose the correct answers from the drop-down menus to complete the paragraph about how sunlight travels through the atmosphere.
    9·2 answers
  • Which of the following describes an element that is reduced in a reaction? It acts in the reactant that is the reducing agent. I
    11·1 answer
  • Each element has three number listed under it which value represent the atomic
    5·1 answer
  • How would you prepare 2-methyl-2-propanol via a grignard with dimethyl carbonate as your carbonyl source? show all reagents?
    9·1 answer
  • How many molecules are there in 322 grams of Cu(NO3)2
    5·1 answer
  • What is the approximate volume of 19g of fluorine gas at a pressure of 4.0 atmospheres and a temperature of 127o C?
    7·1 answer
  • Which phrase best describes the main reason that scientists reproduce the results of other scientists?
    14·2 answers
  • If 280cm3 of hydrogen diffuses in 40secs, how long will it take for 490cm3 of a gas x, whose vapor density is 25 to diffuse unde
    11·1 answer
  • Help pls I will answer some of ur social studies questions!!!
    9·2 answers
  • Somebody help me this pleaseeeeee<br>༎ຶ‿༎ຶ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!