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Savatey [412]
3 years ago
7

Atoms combine to form?

Chemistry
1 answer:
Anna [14]3 years ago
5 0

Atoms combine to form molecules, but your answer could also be elements. I can't be sure because you gave no context. Let me know if I can elaborate in any way!

You might be interested in
In your own words, describe a pure substance. How can elements as well as compounds be considered pure substances.
Marizza181 [45]

Answer:

Pure compounds include elements and compounds where a combination of two or more pure substances is a mixture. Only one type of atom comes in the form of a pure element. Multiple atoms consist of a molecule and different atoms consist of a compound. These are all pure substances and individually.

8 0
3 years ago
If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmosph
andreev551 [17]
Answer: 43.3 l


Explanation:

1) Chemical equation:
2 Li(s) + 2 H₂O (l) → 2LiOH(aq) + H₂ (g)

2) Mole ratios:

2 mol Li : 2 mol H₂O : 2 mol LiOH : 1 mol H₂

3) Number of moles of Li that react

n = mass in grams / atomic mass = 24.6g / 6.941 g/mol = 3.54 moles

4) Yield

Proportion:

2 mol Li / 1 mol H₂ = 3.54 mol  Li/ x


⇒ x = 3.54 mol Li × 1 mol H / 2 mol Li = 1.77 mol H₂

4) Ideal gas equation

PV = nRT ⇒ V = nRT / P

V = 1.77 mol × 0.0821 [atm×l / (mol×K)] × 301 K / 1.01 atm = 43.3 l


V = 43.3 l ← answer



7 0
3 years ago
The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in sunligh
Nonamiya [84]

Answer:

1. C. take in carbon from the air. The carbon is used to make energy storage

molecules.

2. b Carbon is moving into the air and out of the air at the same time

Explanation:

Question 1:

Trees are plants, which are autotrophic organisms i.e. set of organisms that are capable of producing their own food via a process called PHOTOSYNTHESIS. This photosynthetic process produces sugars (glucose) in the presence of SUNLIGHT. According to this question, the sun has been up for several hours, and has been shining on these trees. This means that the trees can take in carbo dioxide (CO2) in order to perform the process of photosynthesis. Also, the number of energy storage molecules in the trees (ATP) will INCREASE.

What can the trees do because they are in sunlight? What does this mean for the ?

8 0
3 years ago
A female bear leaves her bear cubs in their den to go out in search of food. She travels one mile in 30 minutes, heading east. S
Vinil7 [7]

Answer:

Points of acceleration:

1. When female bear goes quickly

2. After becoming tired, when she becomes slow

3. When she changes direction from east to north

4.When she slows down when she reaches the river bed

5. When she turns around

6.When she increases speed to travel southwest to return home

7. When she comes to a stop at home

Explanation:

1. When she is going quickly she is increasing her velocity thus positively accelerating

2. When she becomes slow, she is having negative acceleration.

3. When there is a change in direction of velocity there is an acceleration.

4. Again negative acceleration when she comes to a stop at the river bed

5. Turning around to the southwest direction requires acceleration

6. To increase the velocity to reach home, positive acceleration

7. To decrease the velocity to stop upon reaching home, negative acceleration

8 0
3 years ago
Help me please anyone
Evgesh-ka [11]
Just do it one at a time. How is heart rate affected by exersice? Well, think about it; When you run, your heart rate goes up. When you rest, it goes down. 
Take you time, think carefully and you'll get it.
How are bean seeds affected by water with detergent in it? Well it's not pure water. it's like feeding it soap and expecting it to grow..
6 0
4 years ago
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