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weqwewe [10]
3 years ago
13

an __ is pure substance that cant be broken down into simpler substance by chemical or physical means

Chemistry
2 answers:
melisa1 [442]3 years ago
5 0
<span>An ELEMENT is pure substance that cant be broken down into simpler substance by chemical or physical means</span>
GaryK [48]3 years ago
3 0
<span>An element is pure substance that cant be broken down into simpler substance by chemical or physical means</span>
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The pressure inside an aerosol can is 3.80 atm at 25.0°C. If the temperature is increased from 25.0°C to 100.0°C, what would be
ladessa [460]

Answer:

B. 4.76 atm

Explanation:

P_1 = Initial pressure = 3.8 atm

T_1 = Initial temperature = 25+273.15\ \text{K}

P_2 = Final pressure

T_2 = Final temperature = 100+273.15\ \text{K}

From Gay Lussac's law we have

\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=P_1\dfrac{T_2}{T_1}\\\Rightarrow P_2=3.8\times\dfrac{100+273.15}{25+273.15}\\\Rightarrow P_2=4.76\ \text{atm}

The pressure inside the can would be 4.76\ \text{atm}.

7 0
3 years ago
The rock had a mass of 500g and a density of 10 g/cm3. What is the volume of the rock
NARA [144]

lets work back. The formula to find density is d= m/v. fill in the values you know.

10 = 500/v

well, we don't need to use a calculator. dividing by ten is going to the left once, and removing one value of ten.

this means you have a volume of 50. 

Hope this helps! :D


6 0
4 years ago
Can someone explain how to do this?
Sidana [21]

Balanced equation :

3H₂+N₂⇒2NH₃

<h3>Further explanation</h3>

Equalization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

Unbalanced⇒the number of atoms from both sides (reactants and products) is not the same

H₂+N₂⇒NH₃

H=2(left), H=3(right)

N=2(left), N=1(right)

Balanced ⇒ the number of atoms from both sides (reactants and products) is equal

3H₂+N₂⇒2NH₃

H=3x2=6(left), H=2x3=6(right)

N=2(left), N=2x1=2(right)

4 0
3 years ago
Water is wet. true or false? Why?
Vikentia [17]

Answer:

True water is wet because when something is wet in this case it's water it has water on it at a molecular level. Water molecules are bonded on top of each other so it's wet.

5 0
3 years ago
What volume of 18 M HCl would be used to make a 250-mL diluted solution that is 5.1 M?
Aloiza [94]

Answer: 62.5 mL

Explanation:

The key thing you need to understand here is that chemical reactions depend on reactant particles bumping into each other collision theory

6 0
3 years ago
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