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3 years ago

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Chemistry

2 answers:

Butoxors [25]3 years ago

8 0

Answer:

allows people to make new discoveries through orderly research

Explanation:

Scientific method is a set of rules for obtaining knowledge. It is by applying the scientific method that the researcher proves theories. It is through it that it becomes possible for people to make new discoveries through orderly research. For the research to be considered reliable, with the correct application of the scientific method, it can be repeated indefinitely and present the same results.

Schach [20]3 years ago

7 0

Answer: The correct option is option d

Explanation - The mean deal with science is that it allows people to carry on research in an organized manner to find or make new discoveries and inventions.

The basic purpose of science is to try new things or ways to get an outcome by constant perseverance on research and negating the ways that don't work thus giving and improving knowledge of what is correct and what is not to make a new Discovery or invention.

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2 HCI → H2 + Cl2<br> Endothermic or exothermic

Oksana_A [137]

Answer:

Exothermic

Explanation:

I think it is exothermic because heat is being released

6 0

3 years ago

Why are fungi more closely related to animals than they are to plants?

liraira [26]

the answer maybe B or A

7 0

3 years ago

an element "x" has the election configuration 2,8,3 this element is found in ______group and_____period A.3,llla B.llla,3 C.vlla

iogann1982 [59]

This element is found in group 3A, period 3

<h3>Further explanation </h3>

The maximum number of electrons that can be filled in the nth electron shell is 2n²(n=shell)

K shell (n = 1) maximum 2 x 1² = 2 electrons

L shell (n = 2) maximum 2 x 2² = 8 electrons
M shell (n = 3) maximum 2 x 3² = 18 electrons
N shell (n = 4) maximum 2 x 4² = 32 electrons

Electron configuration of element X : 2.8.3 , so :

K shell = 2 ⇒1s²

L shell = 8⇒2s²2p⁶

M shell = 3⇒ 3s²3p¹

Block p: group 13-18 (has a 2p-6p configuration), also called a representative element because it includes metals, non-metals and metalloids

The outer shell 3s²3p¹ : located in group 3A and period 3

group⇒valence electron ⇒3

period⇒the greatest value of the quantum number n⇒3

3 0

3 years ago

The mass of the erlenmeyer flask alone is 88.000 grams. calculate the mass of the zinc and hcl after the addition of 25 grams of

arsen [322]

If concentration of HCl is 1 mol/dm³ :
m(<span>erlenmeyer flask) = 88,00 g.
m(Zn) = 25,0 g.
V(HCl) = 15 ml = 15 cm</span>³ = 0,015 dm³.
Chemical reaction: Zn + 2HCl → ZnCl₂ + H₂.
n(HCl) = c(HCl) · V(HCl).
n(HCl) = 1 mol/dm³ · 0,015 dm³ = 0,015 dm³.
n(Zn) = 25 g ÷ 65,4 g/mol = 0,38 mol.
n(H₂) = 0,015 mol ÷ 2 = 0,0075 mol.
m(H₂) = 0,0075 mol · 2g/mol = 0,015 g.

7 0

3 years ago

For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The followin

Studentka2010 [4]

Answer : The initial rate for a reaction will be $3.63\times 10^{-4}Ms^{-1}$

Explanation :

Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

For the given chemical equation:

$A+B+C\rightarrow D+E$