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vagabundo [1.1K]
3 years ago
9

Label each statement with its corresponding type of scientific knowledge.

Chemistry
2 answers:
Marrrta [24]3 years ago
8 0

Label each statement with its corresponding type of scientific knowledge.


law

theory

fact

hypothesis


The melting point of ice is 0°C: thus is a fact based on repetitive experiments


Repeated observations have consistently

shown that oppositely charged objects

attract each other: this is law


When the elements carbon and nitrogen

are mixed at 1500°C, they will react

with each other.

this is a hypothesis

Atoms are made of protons, neutrons,

and electrons. Although we can’t directly

see these particles, this structure

explains many experimental observations

Theory

ValentinkaMS [17]3 years ago
7 0

The melting point of ice is 0°C: Fact

Repeated observations have consistently  shown that oppositely charged objects  attract each other: Law

When the elements carbon and nitrogen  are mixed at 1500°C, they will react  with each other: Hypothesis

Atoms are made of protons, neutrons,  and electrons. Although we can’t directly  see these particles, this structure  explains many experimental observations: Theory

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Answer:

sorry I don't know

Explanation:

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Ivan

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When the heat of reaction (H=ve), the reaction is Endothermic reaction<br> True<br> False
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6 0
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Read 2 more answers
If 20.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 37.5 mL of 0.124 M HCl, what is the concentration of the C
Nady [450]
You first need to write the balanced chemical reaction for what is going on.
Ca(OH)₂+2HCl→2H₂O+CaCl₂

After you make the balanced chemical reaction, First you find the moles of HCl used.  To do this multiply 0.0375L by 0.124M to get 0.00465mol HCl.  Then you multiply 0.00465mol HCl by (1mol Ca(OH)₂)/(2mol HCl) to get 0.002325mol Ca(OH)₂.  Finally to find concentration of Ca(OH)₂ used you divide 0.002325mol by 0.020L to get 0.116M Ca(OH)₂.
Therefore the concentration of the unknown solution of Ca(OH)₂ was 0.116M.

I hope this helps.  Let me know if anything is unclear.
6 0
3 years ago
The IUPAC name of(CH3)2CHCH2CH=CH2
jarptica [38.1K]

Answer:

4-Methyl-1-pentene

Explanation:

According to  the International Union of Pure and Applied Chemistry (IUPAC), IUPAC nomenclature of organic chemistry is defined as the system of naming organic chemical compounds.

There are certain rules for naming organic chemical compounds as per IUPAC. The name of given (CH3)2CHCH2CH=CH2 will be based on the same rules.

  • At first find out the longest continuous chain and number the chain consecutively (preference given to double and single bonds), so numbering will start from right to left. the given chemical is 5 Carbon chain long.
  • Then, identify the groups attached to this chain. Methyl is the only group attached to this chain at  4 Carbon.
  • Assemble the name in alphabetical order using the full name using correct prefix and suffix.  

4-Methyl-1-pentene is the name of this chemical, as methyl is in 4th carbon position, Pent for 5 carbon chain and -ene (suffix) for one double bond).

Hence, the correct answer is "4-Methyl-1-pentene".

6 0
3 years ago
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