CHEMISTRY HIGH SCHOOL

What region of the atom contains most of the atoms mass?

Answers

Answer 1
Answer:

Answer:

Nucleus

Explanation: it is the center of the atom, and contains protons and nuetrons

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What is the result of multiplying (2.5 × 1010) × (3.5 × 10-7)?
Yall-It's summer, so likely there's no one on here but like-I got bored and decided to play the password game-Rule 18 is: The elements in your password must have atomic numbers that add up to 200.The current elements I have are: Ne, V, W, ReI don't know what any of this is- I failed chem but please help ;-;Also ignore my username, I haven't used this account in like two years-
The hole in the ozone layer can lead to increases in skin cancer.a. Trueb. False
2H₂O ----> 2H₂ + O₂How many moles of hydrogen are produced when 6.28 mol of oxygen form?A.) 3.14 molB.) 6.28 molC.) 12.6 molD.) 25.2 mol
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How many grams of kclo3 can be dissolved in 100 grams of water at 30 degrees Celsius

Answers

The solubility of KClO₃ : ( 10.1 / 100 g water ) at 30ºC

10.1 g ------------ 100 g ( H₂O )
    ? g ------------- 100 g ( H₂O )

Mass of KClO₃ :

100 * 10.1 / 100

1010 / 100 = 10.1 g of KClO₃

hope this helps!

Which of the following is physical change a. Corrosion
b. explosion
c. Evaporation
d. rotting of food ***

Answers

rotting food
hope this helps
all of the above corrosion, explosion, evaporation and rotting food all have physical change in different aspects

In which type of chemical reaction do two or more substances combine to form one substance? A) synthesis
B) decomposition
C) single replacement
D) double replacement

Answers

The reaction in which two or more substances combine to form one substance is called a synthesis reaction, Option A is the correct answer.

What do you understand by a synthesis reaction ?

The reaction in which two or more molecules combine to form one or more different molecule is called a synthesis reaction.

These are also called as Combination Reaction.

Example Synthesis reaction of Ammonia from Hydrogen and Nitrogen , known as Haber's Process.

3H₂ + N₂-----> 2NH₃

This reaction takes place at high temperature and pressure.

Therefore , The reaction in which two or more substances combine to form one substance is called a synthesis reaction, Option A is the correct answer.

To know more about Synthesis Reaction

brainly.com/question/24936069

#SPJ2
a) synthesis reaction

A bike tire contains a fixed amount of gas at a constant pressure. Initially, the tire contains 4.00 iters of air at 26 degrees Celsius. When the temperature drops to 22 degrees Celsius, the volume of the bike tire will decrease to 3.95 liters.TRUE

FALSE

Answers

Answer:

truuuuuuuuuuuuuue

Explanation:

Answer:

Your answer is true.

- Hope this helps!

I have a question about isotopes, i understand what they are however i can't answer this question for school. it doesn't seem like i have enough info to answer the questionWrite the symbols for the following isotopes.
Its atoms contain 50 electrons and 70 neutrons
Express your answer as an isotope.

Answers

it is most likely that the isotope isnt charged. So i would say there are equal amounts of neutrons as protons. 
50 protons + 70 neutrons+ 120 atomic mass of isotope and 50 is the atomic number so i believe its Sn

Which of the following products is petroleum based? A) steel B) maglev C) plastic D) iron E) Internet

Answers

The product that is petroleum based is the plastic. The answer is letter B. Steel, iron and maglev are metals derived from coals. Internet is also not a petroleum based product

petroleum based is materiel's that contains different kinds of oil and fuel. "which are used in chemical processes to produce plastics".
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