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Stella [2.4K]
3 years ago
7

Would it be D....???? HELPPPPPP

Chemistry
1 answer:
AlekseyPX3 years ago
6 0

Answer:

yes

Explanation:

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What is [h3o ] in a solution of 0.075 m hno2 and 0.030 m nano2?
Tanya [424]
Answer is: concentration of hydrogenium ions is 9,54·10⁻⁵ M.
c(HNO₂) = 0,075 M.
c(NaNO₂) = 0,035 M.
Ka(HNO₂) = 4,5·10⁻⁵.
This is buffer solution, so use <span>Henderson–Hasselbalch equation:
pH = pKa + log(c(</span>NaNO₂) ÷ c(HNO₂)).
pH = -log(4,5·10⁻⁵) + log(0,035 M ÷ 0,075 M).
pH = 4,35 - 0,33.
pH = 4,02.
<span>[H</span>₃O⁺] = 10∧(-4,02).
<span>[H</span>₃O⁺] = 0,0000954 M = 9,54·10⁻⁵ M.
8 0
3 years ago
Is it the power of material evidence that wins, not the authority of experts that
kvasek [131]

Yes, it is the power of material evidence that wins.

  • Evidence used to support or refute a scientific theory or hypothesis is known as material evidence.
  • Evidence is also used by scientists in various contexts, such as when they apply ideas to real-world issues.
  • Whether a person accepts the data as proof depends on their presumptions or views regarding how observations relate to a theory.
  • A creative hypothesis is developed by a scientist and may be refuted by testing it against evidence or established truths.
  • Evidence can refute a hypothesis by demonstrating facts that are at odds with it. In contrast, the presence of evidence does not preclude the possibility of future, undiscovered evidence supporting the idea.

Therefore, it is the power of material evidence that wins, not the authority of experts that

proves an answer in Science.

Learn more about hypothesis here: brainly.com/question/606806

#SPJ9

7 0
1 year ago
[Picture] Fuse the two elements together.
svet-max [94.6K]

K2SO4    MgSO4      Al2(SO4)3     Ge2(SO4)4

KNO3     Mg(NO3)2   Al(NO3)3       Ge(NO3)4

KCH3COO   Mg(CH3COO)2      Al(CH3COO)3     Ge(CH3COO)4 

Note: all of the numerical are subscript to each element or compound.
4 0
3 years ago
Which type of chemical reaction occurs in Ca + Cl2 mc009-1.jpg CaCl2?
gregori [183]

Answer : The correct option is, (a) Synthesis

Explanation :

Synthesis reaction : A chemical reaction where multiple substances or reactants combine to form a single product.

It is represented as,

X+Y\rightarrow XY

Combustion reaction : A chemical reaction in which a hydrocarbon react with the oxygen to give product as carbon dioxide and water.

It is represented as,

CH_4+2O_2\rightarrow CO_2+2H_2O

Single replacement reaction : A chemical reaction in which the more reactive element replace the less reactive element.

It is represented as,

A+BC\rightarrow AC+B

In this reaction, A is more reactive element and B is less reactive element.

Double replacement reaction : It is a type of chemical reaction where a positive cation and a negative anion of two reactants exchange places to form two new products.

It is represented as,

XY+AB\rightarrow XB+AY

(X and A are the cations, Y and B are the anions)

The given reaction is, Ca+Cl_2\rightarrow CaCl_2

In this reaction, calcium combine with the chloride to form calcium chloride as a product.

Hence, the given type of reaction is a synthesis reaction.

5 0
3 years ago
Read 2 more answers
How many words can the word DEOXYRIBONUCLEIC ACID make
Lesechka [4]

Answer: four hundred and 18

Explanation:

Simple math showed that only 16 words are possible from a two-letter combination, but a three-letter code produces 64 words. Operating on the principle that the simplest solution is often correct, researchers assumed a three-letter code called a codon.

3 0
3 years ago
Read 2 more answers
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