Answer:
It's from the quation:
[tex] \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}[/tex]
(How did I know?)
I learnt it while studying the elements of group 1.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Group 1 elements:K, here, is Potassium. It's position in the periodic table is Group 1, Period 4.
Group 1 elements are also called Alkali metals. Group 1 elements have 1 electron in their valence shell(outermost shell), the electron that takes part in chemical reactions.Valance electrons of elements of this group contribute to the valency of the group's elements I.e.,
valency of Alkali metals is 1!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Reaction with water:Alkali metals react vigorously with cold water to form their hydroxides alongwith the evolution of Hydrogen gas.What are hydroxides?
Hydroxides of an element comprises one atom each of oxygen and Hydrogen bonded together, acting as an anion, the hydorxide anion — OH-.
Example:
KOH (hydroxide of Potassium) NaOH (Hydroxide of Sodium)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Back to the question:In the question, The reactants are missing but the products are known, that are, Potassium Hydroxide and water.
Keeping the above mentioned property in mind, the reactants come clear as Potassium(K) and Cold water(H2O).
that makes the equation:
[tex] \mathsf{K + H_2O \rightarrow \: KOH + H_2 }[/tex]
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Balancing the equation:For an equation to be balanced, the number of atoms of each elements on both side of the equation must be equal.
Number of atoms of each element on the LHS:
K = 1 H = 2O = 1(subscript in front of an atom represents its number of atoms in the compund)
Number of atoms of each element on the LHS:
K = 1 H = 1 + 2 = 3O = 1The number of Hydrogen atoms on boths sides is NOT balanced!
Hit and trial method:
If we add a "2" in front of K, H2O and KOH
[tex] \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }[/tex]
Number of atoms on both the sides become equal.
(TIP: This comes thru practice:/. but main point is even out the oxygen and Hydrogen atoms first. like if it's 3 multiply it by 2 and you get an even number, I.e., 6)
Number of atoms of each element on the LHS:
K = 2H = 4O = 2Number of atoms of each element on the LHS:
K = 2H = 2 + 2 = 4 O = 2- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Answer:Hence, the balanced form of the equation is:
[tex] \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}[/tex]
how can you tell the number covalent bonds the atoms of an element can form?
Read the article by Michael Fumento, writer for the New York Post editorial blog, who does not support global warming.
Back in 2005 I and others reviewed the entire hurricane record, which goes back over a century, and found no increase of any kind. Yes, we sometimes get bad storms—but no frequently now than in the past. The advocates simply ignored that evidence.
Fact is, the earth was cooling and warming long before greenhouse gases could have been a factor. The [global warming supporters] have been proved wrong time and time again.
Which best describes the reliability of the source?
Nationally certified organizations are considered an unreliable source because the public can access their information.
Charities are considered a reliable source because the public makes financial contributions to them.
Editorial blogs are considered an unreliable source because the author may not have a science background.
Editorial blogs are considered a reliable source because authors contribute to them regularly.
The editorial blogs are considered an unreliable source because the author may not have a science background. Option C
What the reliability of a source?We know that not all sources of information could be taken to be reliable. A source of information could come across as being reliable when the source is an authority in the area in which the information is furnished.
Such authorities often publish authentic and verified information in reputable journal that are meant for professional consumption.
Thus, the editorial blogs are considered an unreliable source because the author may not have a science background.
Learn more about editorial blogs:https://brainly.com/question/9063649
#SPJ1
help pleaseeeee <333
Answer:
In Test 1 the person substantially did better and either had better knowledge of the subject or studied for it more then they did for Test 2.
Explanation:
Example The anticancer druge cir-platin hydrolysis in with constant 1. Solo - at pH 7:0 and 25°c. calculate the half life of the reaction
Answer:
ganda no beeeeeèeeeeee
Neon consists of three isotopes: Neon-20 with a mass of 19.992 amu and an abundance of 90.48%, Neon-21with a mass of 20.994 amu and an abundance of 0.27%, and Neon-22 with a mass of 21.991 amu and an abundance of 9.25%. Determine the average atomic mass of Neon:
ce cantitate se solutie NaOH de cantitate 0.2 M reactioneaza total cu 300g fenol de puritate 90%?
HOPE IT HELPS YOU
CAN YOU BRAINLEST ME
new substances are formed in a chemical reaction as a result of
Answer:
New substances formed when breaking of bonds take place and new bonds get formed which results in formation of new products. That breaking of bond is a chemical change because in such a process composition of substance gets changed and forms a new substance.
Chemistry
How does the difference in size of particles affect the rate of diffusion?
Explanation:
Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.
Explanation:
smaller particles diffuse faster
larger particles diffuse slower
Someone pls help me I will make you brain
Answer:
111
16464616944664kxkxlndkkndndnfnnfnfnnfnf7. How do the test variables (independent variables) and outcome variables (dependent variables) in an
experiment compare?
The test variable (independent variable) and outcome variable (dependent variable) have no affect
BL A. on each other.
The test variable (independent variable) controls the outcome variable (dependent variable).
BB
The outcome variable (dependent variable) controls the test variable (independent variable).
B.C.
The test variables (independent variables) and outcome variables (dependent variables) are the same
Bi D. things
Answer:
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Explanation:
Hope this helps...
Someone pls help me with this I will make you brain
Answer:
The answer should be primary pollutants from a stationary source.
Explanation:
Primary pollutants are emitted directly from a source and do not change in the atmosphere, and from a stationary source because manufacturing factories have a fixed location.
Hope this helped :D
Someone pls help me I will make you you brain
Answer:
I and II
Explanation:
Question 2 Which models of the atom from task 1 are not supported by Rutherford’s experimental evidence? For each of these models, explain the experimental results that the model would predict.
Answer:
Sorry I don't know.
Explanation:
I'm only in middle school.
3. How many moles of silver is 8.46x1024 atoms of
silver?
Answer:
14.05 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{8.46 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.053156[/tex]
We have the final answer as
14.05 molesHope this helps you
Select the correct answer from the drop-down menu.
which element has a larger atomic radius than sulfur?
An atom has 7 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.
Explanation:
An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.
The atom described is an anion with -1 charge as it has one extra electron than protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
https://brainly.com/question/13654549
#SPJ2
Someone pls help me I will mark you as brain
Answer:
Chlorination
Explanation:
"Exposure to high volumes of chlorine gas fumes can cause serious health problems, including death."
https://water.mecc.edu/courses/ENV211/lesson14_print.htm
:)
The colour observed hrainbow during on the lower side of a a sunny rainy day is
Answer:
..
Explanation:
The atomic number of oxygen is 8. The mass number of an atom of oxygen is 17. Describe the number and type of particles in the nucleus of this atom.
Answer:
protons: 8
neutrons: 9
Explanation:
the atomic number tells you how many protons are in a element. The mass is the number of protons + neutrons.
17 - 8 = 9 neutrons
There are 8 protons and 9 neutrons in the nucleus of the oxygen atom.
What is the atomic number and mass number of an atom?The atomic number of an atom is the number of protons in atom of an element.
It can also be defined as the number of electrons in a neutral atom of an element.
The mass number is the number of protons and neutrons in the nucleus of an atom of an element.
The proton number of the oxygen atom is 8
The neutron number is 17 - 8 = 9
Therefore, in the nucleus of the oxygen atom, there are 8 protons and 9 neutrons.
Learn more about atomic number and mass number at: https://brainly.com/question/12169134
#SPJ6
What charge would an ion have if it had more electrons than protons?
A. It would have a net positive charge.
OB. It would have no charge.
C. It would have a net negative charge.
Ο Ο
D. It would be neutral, since electrons would be outside the nucleus.
Answer:
it will have a net negative charge and it is known as anion
what would happen to dietary protein if hcl were not being produced in sufficient quantities?
Dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
In the stomach, there are some glands found on the stomach lining that helps to release hydrochloric acid (HCl). Their major role is to dissolve food and produce an acidic medium.
The acidic media promotes and improves the conversion of pepsinogen to pepsin. Pepsin acts as an enzyme that supports protein digestion.
Protein digestion requires a pH of around 1.8 which can be achieved by the secretion of HCl.
As a result, if HCI is not released in the stomach in sufficient quantities, pepsin will not be activated and it would have a detrimental impact on protein digestion.
Therefore, we can conclude that dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
Learn more about dietary proteins here:
https://brainly.com/question/17303328?referrer=searchResults
2+2+2 plssssssssssssssssssssssssss
Answer:
6
Explanation:
2+2+2=6 :)
Answer:
6
Explanation:
vvvffhjh DC hcf vhcnbfhbc
Mrs. Sprague wants to determine which type of ball has the highest bounce. she
drops a tennis ball, soccer ball, then a basketball from a height of 15 feet, and
measures and records how high each type of ball bounces back up.
What is the Independent Variable in this experiment?
A.the different types of balls being tested
B.the height of the drop
C.the height of each bounce
D.the measuring tape
PLEASE HELP
Answer:
Explanation:
It's going to be the height of the drop. That is kept as a constant. The dependent variable is how high each ball bounces.
how many electrons must beryllium gain or lose to form stable ions
Explanation:
beryllium must loss 2 electrons to form a stable octet to its nearest noble gas Helium.
It can loss electron because it is a metal and is placed in 2group and 2 period in group of alkaline earth metals.
hope this helps you to.
What will happen when we replace oxygen with nitrogen in our life while breathing and what will happen if it was in our cells? (Theory no one has ever thought)
How are glucose and galactose epimers?
Kindly describe in brief how this epimer is different from manose and glucose one.
Help please and thanks!
Answer:
hehe I needed some brianliest plz OK
Explanation:
Glucose and galactose are monosaccharides that differ from one another only at position C-4. Thus, they are epimers that have an identical configuration in all the positions except in position C-4. ... Glucose and galactose are epimers that do not differ in position C-5 but differ in position C-4.
Glucose and mannose are epimers that differ at the C-2 carbon, while glucose and galactose are epimers that differ at the C-4 carbon, as shown below. When a molecule such as glucose converts to a cyclic form, it generates a new chiral center at C-1.
I wish this is ur ANS Thank You !!!Which phrase describes transmutation?(1 point)
the conversion of an atom of one element into a different element through nuclear changes
the conversion of energy to matter through chemical changes
the conversion of protons to neutrons through nuclear changes
the conversion of one substance to another through chemical changes
Help plss quick
thx
The phrase that describes transmutation is ; ( A ) The conversion of an atom of one element into different element through nuclear changes.
Transmutation is simply the change of an element to another element, transmutation occurs at the nucleus of the atom of an element and this process is initiated through nuclear reaction ( radioactive decay ).
Therefore the conversion of an atom of one element into different element through nuclear changes summarizes the term "transmutation".
Hence we can conclude that the phrase that describes transmutation is the conversion of an atom of one element into different element through nuclear changes.
Learn more : https://brainly.com/question/4267926
Answer:
Unit 4 Lesson 2:
Energy Release Quick Check
1. 138
2. The conversion of an atom of one element into a different element through nuclear changes.
3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.
4. 82
5. Some of the matter is converted to energy.
Please give me Brainliest. You're Welcome
1. What are the 5 characteristics a substance must have in order to be a mineral
Answer:
A mineral has to be naturally occurring, inorganic, solid, have a crystal structure, and have a definite chemical composition.
Explanation:
In 6CH4, we have 6 molecules of CH4. What is the 6 called?
Answer:
The coeffeceient
Explanation: