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Lunna [17]
3 years ago
8

Science problem please help

Chemistry
2 answers:
masha68 [24]3 years ago
8 0
The answer to your question number 5 is b
-Dominant- [34]3 years ago
5 0
Question 5 would be c, and b

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Is density a chemical or physical property of a substance?
pychu [463]

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

I hope this helps you understand! <3

8 0
3 years ago
When a pendulum swings, if it is not continuously pushed it will not stop eventually because some of its energy is changed into.
Vladimir79 [104]
Well, there is kinetic energy when the object is in motion. But it will stop eventually because that energy is converted into thermal energy, or heat.
7 0
3 years ago
What is the energy for each question in Joules?
beks73 [17]

Answer:

Hello, there!

In order to solve problems like this DO PEMDAS

The Exponent:

So,  equals  4

Your problem becomes

Now we have to do what is in the  (

( the  is a  )

And

Problem becomes

So, this means that your answer would be  

Good luck on your assignment and enjoy your day!

kjExplanation:

7 0
2 years ago
Does anyone know the answers for these
Alexeev081 [22]

Answer: 1. 0.045moles

2.  2.10 grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

1. \text{Number of moles of zinc nitrate}=\frac{8.51g}{189.36g/mol}=0.045moles

2. Mass of C_2H_4=moles\times {\text {Molar mass}}=0.075moles\times 28.05g/mol=2.10g

4 0
3 years ago
HELP ASAP PLZ!!!
LuckyWell [14K]

Answer:

2

Explanation:

5 0
4 years ago
Read 2 more answers
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