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mamaluj [8]
3 years ago
11

Astrology is the study of how the positions of the stars and movements of the planets influence the lives and behaviors of peopl

e. Astrology dates back to the second millennium BCE. Modern Western astrology is often associated with horoscopes that explain an individual’s personality and predict significant events in his or her life based on the position of stars and planets. There is no evidence to support the validity of astrology or its methods. Is astrology an example of science or pseudoscience? Explain your answer.
Chemistry
2 answers:
blagie [28]3 years ago
6 0

Answer: Astrology is an example of pseudoscience. It is based on beliefs and is not supported by any scientific evidence.

miss Akunina [59]3 years ago
6 0

Answer:

Astrology is an example of pseudoscience. It is based on beliefs and is not supported by any scientific evidence.

Explanation:

thats the sample response

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Which of these functional groups is found in all amino acids? -NH2 -OH =O -PO42-
melisa1 [442]

Answer : The correct option is, -NH_2

Explanation :

Amino acid : The acid that contains two functional groups that are carboxylic group, -COOH and ammine group, -NH_2.

When the two or more that two amino acids join together with the help of peptide bond, they produces polypeptide chain or protein.

The bond present between the two amino acid is called a peptide bond.

The peptide bond is a chemical bond that is formed between the two molecules when the nitrogen of one amino acid react with the carbon of another amino acid by releasing a water molecule. This is a dehydration synthesis or condensation reaction.

From this we conclude that, only two functional groups carboxylic group, -COOH and ammine group, -NH_2 are present in all amino acids.

Hence, the correct option is, -NH_2

7 0
3 years ago
Identify the type of plant tissue that brings in gases:
artcher [175]

Answer:

epidermal

Explanation:

6 0
3 years ago
Read 2 more answers
For the reaction ? Fe+? H2o ⇀↽? Fe3o4+? H2 , a maximum of how many grams of fe3o4 could be formed from 354 g of fe and 839 g of
Evgesh-ka [11]

The given reaction is:

3Fe + 4H2O → Fe3O4 + 4H2

Given:

Mass of Fe = 354 g

Mass of H2O = 839 g

Calculation:

Step 1 : Find the limiting reagent

Molar mass of Fe = 56 g/mol

Molar mass of H2O = 18 g/mol

# moles of Fe = mass of Fe/molar mass Fe  = 354/56 = 6.321 moles

# moles of H2O = mass of h2O/molar mass of H2O = 839/18 = 46.611 moles

Since moles of Fe is less than H2O;  Fe is the limiting reagent.

Step 2: Calculate moles of Fe3O4 formed

As per reaction stoichiometry:

3 moles of Fe form 1 mole of Fe3O4

Therefore, 6.321 moles of Fe = 6.321 * 1/ 3 = 2.107 moles of Fe3O4

Step 4: calculate the mass of Fe3O4 formed

Molar mass of Fe3O4 = 232 g/mol

# moles = 2.107 moles

Mass of Fe3O4 = moles * molar mass

= 2.107 moles * 232 g/mol = 488.8 g (489 g approx)

 


7 0
3 years ago
Read 2 more answers
2. Classify the following solutions as acidic, basic, or neutral at 25OC.
PilotLPTM [1.2K]

Answer: a) pH = 13.00 : basic

b) [H_3O^+]=1.0\times 10^{-12}: basic

c) pOH = 5.00 : basic

d) [OH^-]=1.0\times 10^{-9}: acidic

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

pH=-\log [H_3O^+]

Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.Neutral substances have pH of 7.

a) pH = 13.00

As pH is more than 7, the solution is basic.

b)  [H_3O^+]=1.0\times 10^{-12}

Putting in the values:

pH=-\log[1.0\times 10^{-12}]

pH=12

As pH is more than 7, the solution is basic.

c) pOH = 5.00

pH+pOH=14.0

pH=14.0-5.00=9.00

As pH is more than 7, the solution is basic.

d) [OH^-]=1.0\times 10^{-9}

Putting in the values:

pOH=-\log[1.0\times 10^{-9}]

pOH=9.00

pH+pOH=14.0

pH=14.0-9.00=5.00

As pH is less than 7, the solution is acidic.

3 0
3 years ago
If the mass of a certain block is 500g, what is the weight of the block?
Dafna11 [192]

<em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em><em>_</em>

<em>Sol</em><em>ution</em><em>,</em>

<em>Mass</em><em>=</em><em>5</em><em>0</em><em>0</em><em>g</em><em> </em><em>=</em><em>5</em><em>0</em><em>0</em><em>/</em><em>1000</em><em>=</em><em>0</em><em>.</em><em>5</em><em> </em><em>kg</em>

<em>gravity</em><em>(</em><em>g</em><em>)</em><em>=</em><em>9</em><em>.</em><em>8</em><em>m</em><em>/</em><em>s^</em><em>2</em>

<em>Now</em><em>,</em>

<em>Weight</em><em>=</em><em> </em><em>m</em><em>*</em><em>g</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>0</em><em>.</em><em>5</em><em>*</em><em>9</em><em>.</em><em>8</em>

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<em>So</em><em> </em><em>the</em><em> </em><em>weight</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>block</em><em> </em><em>is</em><em> </em><em>4</em><em>.</em><em>9</em><em> </em><em>Newton</em>

<em>hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em><em>.</em><em>.</em>

<em>Good</em><em> </em><em>luck</em><em> on</em><em> your</em><em> assignment</em>

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5 0
3 years ago
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