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Pavel [41]
3 years ago
15

Pls help me pls pls pls pls​

Chemistry
1 answer:
miv72 [106K]3 years ago
4 0

Answer:

  1. different
  2. substance
  3. constant
  4. completely
  5. liquid
  6. solid
  7. pure substance
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Which phrase defines altitude?
brilliants [131]
The height of a given point
4 0
3 years ago
Calculate the ph of a 0.005 m solution of potassium oxide k2o
Alecsey [184]
First, we have to see how K2O behaves when it is dissolved in water:

K2O + H20 = 2 KOH

According to reaction K2O has base properties, so it forms a hydroxide in water.
For the reaction next relation follows:

c(KOH) : c(K2O) = 1 : 2

So,

c(KOH)= 2 x c(K2O)= 2 x 0.005 = 0.01 M = c(OH⁻)

Now we can calculate pH:

pOH= -log c(OH⁻) = -log 0.01 = 2

pH= 14-2 = 12




3 0
3 years ago
The speed of a car is 16 meters per second. What is this speed in miles per hour? What is
Dovator [93]

<u>Conversion Factors:</u>

1.61 km = 1 mile

60 sec = 1 min

60 min = 1 hour

<u />

Use dimensional analysis to solve.

=\frac{16\ meters}{1\ second} × \frac{1\ km}{1000\ meters} × \frac{1 mile}{1.61\ km} × \frac{60\ seconds}{1\ min} × \frac{60\ min}{1\ hour}

=35.77639752

= 36 miles/hour

If done properly, you should be left with the units <em>miles/hour</em>

<em />

3 0
3 years ago
What’s the compound name for V2(S2O3)3
ohaa [14]

Answer: I HOPE THIS HELPS, HAVE A GREAT EARLY HALLOWEEN

Explanation:

PubChem CID: 1084

Molecular Formula: S2O3(2−) or O3S2-2

Synonyms: Thiosulphate THIOSULFATE ION sulfurothioate UNII-LLT6XV39PY Thiosulfate (S2O32-) More...

Molecular Weight: 112.13 g/mol

7 0
3 years ago
Seven carbon chain with CH3 attached to second and third carbon
Nikitich [7]

Answer:

2,3-dimethylheptane.

CH₃ - CH - CH-CH₂-CH₂-CH₂-CH₂

           |        |

       CH₃    CH₃

Explanation:

Hello there!

In this case, according to the given instructions, it is possible to draw the organic chemical structure by connecting seven carbon atoms along the parent chain with two methyl substituents at the second and third carbon atoms; thus, the resulting structure is:

CH₃ - CH - CH-CH₂-CH₂-CH₂-CH₂

           |        |

       CH₃    CH₃

Furthermore, the name would be 2,3-dimethylheptane according to the IUPAC rules for nomenclature.

Best regards!

6 0
3 years ago
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