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Norma-Jean [14]
3 years ago
5

which is a chemical change, water boiling, wood burning,glass breaking, ice melting, or molding iron ?

Chemistry
2 answers:
aalyn [17]3 years ago
6 0
I believe it would be wood burning because you would not be able to reverse that process.
barxatty [35]3 years ago
4 0
The answer would be water boiling because the steam is rising creating water vapor.
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aleksandrvk [35]

Answer:

<h2>Physical properties: H2SO4 is a colorless or slightly yellow viscous liquid with a pungent odor. It has a density of 1.84 g/mL, boiling point of 337 °C, and melting point of 10 °C. "Concentrated" sulfuric acid is 98% in water, and is the most stable form.</h2>
6 0
3 years ago
H2 + NO → H2O + N2<br><br><br> If 180.5 grams of N2 are produced, how many grams of H2 were reacted?
Lena [83]

Answer:

12.89 moles

Explanation:

Before we solve the question, we have to balance the equation of the reaction first. The balanced reaction will be:

2 NO + 2 H2→ N2 + 2 H2O

There are 180.5g of N2 produced, the number of produced in moles will be: 180.5g / (28g/mol)= 6.446 moles

The coefficient of H2 is two and the coefficient of N2 is one. Mean that we need two moles of H2 for every one mole of N2 produced. The number of H2 reacted will be: 2/1 * 6.446 moles = 12.89 moles

6 0
3 years ago
A scientist places 10 ml of water in a test tube and heat it with flaming burner for 2 minutes. The liquid boils and escapes as
aliina [53]

Answer:

physical change

Explanation:

The evaporation of water is a physical change. When water evaporates, it changes from the liquid state to the gas state, but it is still water; it has not changed into any other substance. All changes of state are physical changes.

7 0
2 years ago
Read 2 more answers
An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope
jeka57 [31]
It is an alpha decay because when this phenomena occurs an atomic nucleus emits an alpha particle (helium nucleus) and consequentially decays into another atom with a mass number that is reduced by four an atomic number that is reduced by 2 two. The helium atom consists of two protons and two neutrons.

Therefore, the answer is <span>alpha decay because alpha particles have two protons and two neutrons</span>
3 0
2 years ago
Read 2 more answers
Photo attached, please help me if you can :(
mylen [45]

Answer:

I'm pretty sure the ionic structure is C, sorry this is only one answer tho : , (

Explanation:

7 0
3 years ago
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