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atroni [7]
2 years ago
12

Please help me with number 4 and 5 on my study guide

Chemistry
1 answer:
Shtirlitz [24]2 years ago
5 0

Answer:

help with problem 4

Explanation:

4. protons are equal to atomic numbers. neutrons are atomic mass minus atomic number. electrons are equal to protons.

5. I don't know, sorry.

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Chelsi has talked to her artist friends about how much money they earn each year from working in the arts. She gathers these val
Citrus2011 [14]

Answer:

The median would be 6700

Explanation:

Arrange data values from lowest to highest value

The median is the data value in the middle of the set

.

Ordering a data set x1 ≤ x2 ≤ x3 ≤ ... ≤ xn from lowest to highest value, the median x˜ is the data point separating the upper half of the data values from the lower half.

If the size of the data set n is odd the median is the value at position p where

Formula for the median

p=n+12

x˜=xp

If n is even the median is the average of the values at positions p and p + 1 where

p=n2

x˜=xp+xp+12

If there are 2 data values in the middle the median is the mean of those 2 values.

7 0
3 years ago
Can anyone help me with the last question.<br> it whould help me a ton
lina2011 [118]
For the very last question you would first divide 8,900 by 12 and the number you get will be the answer. You should get 741.66
8 0
3 years ago
Which type of cell is a rose thorn? prokaryotic eukaryotic plant eukaryotic animal chloroplastic
Ede4ka [16]
Plant cells<span> are </span>eukaryotic cells<span>. Prokaryotic </span>cells<span> do not contain a membrane bound nucleus, mitochondria or other membrane bound </span>cell<span> structures (organelles), the DNA of prokaryotic </span>cells<span> are located in the cytoplasm of the </span>cell<span>. ... </span>Plant cells<span> are </span>eukaryotic<span> because they have a nuclear membrane.
so therefore, A rose thorn is a eukaryotic plant cell.</span>
5 0
3 years ago
Read 2 more answers
Please help me I will give a brainleist​
Korvikt [17]
When the dew point temperature and air temperature are equal, the air is said to be saturated. Dew point temperature is NEVER GREATER than the air temperature. Therefore, if the air cools, moisture must be removed from the air and this is accomplished through condensation.
7 0
3 years ago
Consider the following scenario
GarryVolchara [31]

Answer:

See explaination

Explanation:

Going by the clues that it is between Silver Flouride (AgF) and Sodium Fluoride (NaF) and since it is an aqueous solution , the 1 liter bottle is likely to be Sodium Chloride( NaCl). Going by the reaction,

AgF + NaCl= AgCl + NaF

Here, the color of AgCl is white, hence the solution cannot be AgCl.

Determination of NaCl

Determination of NaCl can be done by Mohr's Method or Volhard's method. But results in Volhard's method are more accurate . Its uses the method of back titration with Potassium Thiocynate which forms a AgCl precipitate . Prior to titration,excess AgNO3 ( The problem also has a clue that excess reagents are present in the lab ) is added to the NaCl solution so that all the Cl- ions react with Ag+. Fe3+ is then added as an indicator and the solution is titrated with KSCN to form a silver thiocyannite precipitate (AgSCN). Once all the silver has reacted, a slight excess of SCN- reacts with Fe3+ to form Fe(SCN)3 dark red complex. The concentration of Cl- is determined by subtracting the titer findings of Ag+ ions that reacted to form AgSCN from the Ag NO3 moles added to the solution. This is used because pH of the solution is acidic. If the pH of solution is basic, Mohr's method is used.

Reactions

Ag+ (aq)+ Cl-(aq) = AgCl(aq)

Ag+(aq) + SCN-(aq) = AgSCN(aq)

Fe3+(aq) + SCN-(aq) = [FeSCN]2- (aq)

7 0
3 years ago
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