Answer:
B
Explanation:
IM A CHEMISTRY WIZZZZ
:)
I hope u get full marks on your paper/test/quiz or whatever!
There is a 20 percent chance so stay positive!
Answer:
D
Explanation: ultraviolet rays are harmful to humans
NaCl + NH3 + CO2 + H20 NaHCO3 + NH4CI
Which Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation?
Option (1) represents the Lewis electron-dot diagram correctly containing nitrogen in the equation.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Valence electrons are given by hydrogen atoms = [tex]1\times3=3[/tex]
Valence electrons are given by nitrogen atom = [tex]5\times1=5[/tex]
Total valence electrons = 3 + 5 = 8
So, the calculation above is shown only the first option. So, (1) Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation.
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balance the following equation FeC²+Cl². FeCl³
Answer:
this equation is not proper see that where is the reactant.
Explanation:
give give a proper question and I will
if fecl2 + c2 gives a fecl3 where does the carbon compound go
Answer:
2FeCl2 + Cl2 → 2FeCl3
Explanation:
For each of the following ionic bonding examples, show the transfer of electrons, the ions resulting with the charges and the final chemical formula of the compund.
Ba and O,
Al and O,
Mg and P,
Na and O,
Ca and Cl
Answer:
BaO
Ba gives up two electrons and becomes Ba⁺²O takes two electron and becomes O⁻²Al₂O₃
Mg₃P₂
Na₂O
CaCl₂
when combined the two substances together in the cup, the product can be described as a ____ or ____ (there are two possible answers . you just need to choose one )
1. white gas
2. white liquid
3. white solid
2Na(s) + Cl2(g) → 2NaCl(s)
Which of the following choices shows the correct Lewis electron-dot diagram for a molecule of chlorine, Cl2?
Answer: 2!
Explanation:
The best lewis structure for [tex]Cl_2[/tex] is in option 2.
Na or sodium is the cation in the reactant.
Cl or chlorine is the anion in the reactant side.
NaCl is the product of the reaction.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Chlorine is a group VIIA element in the periodic table and contains seven electrons in its last shell.
Valence electrons are given by chlorine atoms = [tex]7\times2=14[/tex]
Total valence electrons = 14
So, each of Cl is surrounded by three pairs of dots, connected by a single line. So, the best lewis structure for [tex]Cl_2[/tex] is in option 2.
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The following dot plot represents the litter sizes of a random sample of labrador retrievers.
Calculate the mean, median, and mode for this set of data.
Calculate the range, interquartile range, and mean absolute deviation (rounded to the nearest hundredth) for this set of data. For the mean absolute deviation, do not round the mean.
Make two inferences about the litter size of labrador retrievers.
Answer:
12
Explanation:so the mean deviation is for the square and the square is for you so you keep the square and add it.
Answer:
1. mean: 7.78 median: 8 mode: 7
2. range: 9 interquartile range: 2 MAD: 4.5367
3. The range is about 4 times bigger than the interquartile range. The mean is around double the MAD.
Explanation:
2. Each type of atom is called an element. Which part of the atom give the
atoms its Identity?
The smallest particle of an element which is indivisible and takes part is chemical reaction as a whole without division is called an atom.
the three fundamental particles that identify the atoms are protons, neutrons and electrons.
Two different gases are stored inseparate closed containers. If both gases have a temperature of 50°C, which
statement is true?
Answer:
Explanation:
there should be more showing than telling
1. MnO₂ is an example of what type of bond?
a covalent
b ionic
c polyatomic ion
2. Cl is an example of a cation, anion, or polyatomic ion
a polyatomic ion
b anion
c cation
Answer:
1. covalent
2. polyatomic ion
Explanation:
:)
Answer:
1) b
2)c
Explanation:
Which of the following diagrams represents a single
replacement reaction?
Explanation:
i think the answer is....b
The diagram that represents single replacement reaction is:
b.
Single replacement reaction:This reaction is also known as displacement reaction. It is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products. For example:
[tex]2HCl(aq)+Zn(s)--->ZnCl_2(aq)+H_2(g)[/tex]
Thus, option b is correct.
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What is the different things that we have and animals?
Answer:
the different things that we have and animals are.:
to gain emotional support.it acts as a real friend.for meat,flesh,milk and milk products, wool,etc.for transportation like horseto enjoy and play like with dolphinsdo you guys know what these are? im stuck
Answer:
See explanation
Explanation:
1) From the reaction equation;
2 moles of KClO3 yields 2 moles of KCl
Hence,
4 moles of KClO3 yields 4 * 2/2 = 4 moles of KCl
2) Given that from the reaction equation, we have;
Burning 3 * 6.02 * 10^23 molecules of oxygen yields 2 * 22.4 L of CO2
Hence,
7 * 10^25 molecules of oxygen yields 7 * 10^25 * 2 * 22.4 / 3 * 6.02 * 10^23
= 313.6 * 10^25/18.06 * 10^23
= 17.36 * 10^2
= 1736 L
A mole of carbon has the same number of atoms as a mole of beryllium.
O True
False
Answer:
False.
Explanation:
Carbon = 12
Beryllium = 9
good luck, i hope this helps :)
What is the temperature in kelvin of a gas if it is allowed to expand from 1.50 L to 4.50 L? The initial temperature is 10.0°C and pressure is constant throughout the change.
Which equation should you use?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
T subscript 2 equals StartFraction V subscript 1 over V subscript 2 EndFraction T subscript 1.
T subscript 2 equals StartFraction V subscript 2 over V subscript 1 EndFraction T subscript 1.
Answer:
first question is the third option and the second question is 849K.
Explanation:
Answer:
third option
849K
Explanation:
Help plz pozlzlzksj help
Answer:
increase moles of gas inside
Explanation:
Answer:
Its ( C )- Decrease the temperature of the gas inside the basketball
Explanation:
To make sure the balloon doesn't inflate so much it bursts you should NOT completely inflate the balloons when you know the temperature will increase!
Which of the following is the ground state electrons configuration of the F ion
Answer:
That leaves us with: 1s2 2s2 2p6 And that is the electron configuration for F- , the Fluoride ion.
Explanation:
plz give brainliest
Can you help me please....
sorry the pic is blocked
if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, how many moles of ammonia gas would be produced?
Answer: 3.00
Explanation: got the answer from my teachers notes
According to stoichiometry, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical reactions.In the given reaction 3 moles hydrogen gives 2 moles ammonia, thus, 4.5 moles of hydrogen will give, 4.5×2/3=3 moles.
Thus, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
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Which row gives the correct order of reactivity of the four metals?
(look at the attached photo)
Answer:
D
Explanation:
Answer:
C) gold - zinc - magnesium - lithium
What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
Answer:
18,75 litres
Explanation:
4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
n (NH3) : n (O2) = 4 : 3
<=>
V (NH3) : V (O2) = 4 : 3
Hence, V(O2) = 3 × V (NH3) ÷ 4 litres
V(O2) = 3 × 25.0 ÷ 4 litres
V(O2) = 75 ÷ 4 litres
V(O2) = 18,75 litres
If you have any questions, feel free to ask :)
the more massive an object is, the more
Answer:
it have more more mass, gravitational potential energy
Explanation:
What is the molarity of a solution in which 35 mole of AgNO3 is dissolved in 5 L of solution?
Answer:
23
Explanation:
Answer:
0.118m
Explanation:
Changes in thermal energy provide evidence that a chemical reaction
has occurred. Which of the following BEST describes a chemical reaction
in which energy is released?
Select one:
Exothermic reaction.
Reversible reaction
Physical reaction
Endothermic reaction.
Answer:
Exothermic reaction
Explanation:
Exothermic reaction is a reaction in which energy is evolved from the reaction to the surroundings
5. What is the charge on a single proton?
Answer:
it may be +1 or -1 hope this help
An atom is a kind of stuff that cannot be further decomposed chemically. Therefore, the charge on a single proton is +1.
What is atom?
The building block of an element is an atom. An atom is a kind of stuff that cannot be further decomposed chemically. The three main components of an atom are protons, neutrons, plus electrons.
Some substances are either bigger or smaller than atoms. Instances of chemical species that aren't commonly regarded as atoms include protons, neutrons, and electrons, which are atom-related particles. Atoms make up molecules and compounds, however they are not actual atoms. Salt is an example of a molecule and a compound (NaCl). The charge on a single proton is +1.
Therefore, the charge on a single proton is +1.
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what is the mass of 0.75 mol of hydrogen sulfide
Answer:
25.56066
Explanation:
hope this helps !!!!!!! and sorry if it doesn't help
Why aren't acid-base reactions considered redox reactions, even though they involve the transfer of hydrogen atoms?
Answer: Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.
Explanation:
let me know if that helped...(☞ﾟヮﾟ)☞
Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.
What is acid-base reaction?An acid-base reaction is the chemical reaction that occur when acids and bases react together.
What is redox reaction?Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.
Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.
Redox reactions involve a change in oxidation number for one or more reactant elements.
Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.
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Molar Concentration of H2O+ lons
in Four Solutions
Solution Molar Concentration
of H3O+ lon
(M)
A 0.1
B 0.01
с 0.001
D I’m 0.0001
Which solution has the highest pH?
Answer:
d
Explanation:
because it’s moving the most spots to the left
The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. Here among the given solutions, the solution D has the highest pH. The correct option is D.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. The pH scale is introduced by the scientist Sorensen. It is more easy to express the concentration of H₃O⁺ using this method.
The equation used to calculate the pH of the solution is given as:
pH = -log[H₃O⁺]
For 0.1 M
pH = -log[0.1] = 1
For 0.01 M
pH = -log[0.01] = 2
For 0.001 M
pH = -log[0.001] = 3
For 0.0001 M
pH = -log[0.0001] = 4
So solution D has the highest pH which is 4.
Thus the correct option is D.
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What is the most common oxidation number for group 3 on the periodic table?
Answer:
español
Un elemento del grupo 3 es un elemento situado dentro de la tabla periódica en el grupo 3. Los átomos de estos elementos tienen gran tendencia a oxidarse y son muy reactivos, predominando el estado de oxidación +3. Presentan propiedades muy similares al aluminio. Dan lugar a iones incoloros.
ingles
An element of group 3 is an element located within the periodic table in group 3. The atoms of these elements have a great tendency to oxidize and are very reactive, with the +3 oxidation state predominant. They have properties very similar to aluminum. They give rise to colorless ions.
Explanation:
ingles
Group -> 3
Group -> 3Period
Group -> 3Period4 21
Group -> 3Period4 21Sc
Group -> 3Period4 21Sc5 39
Group -> 3Period4 21Sc5 39Y
Group -> 3Period4 21Sc5 39Y6 57
Group -> 3Period4 21Sc5 39Y6 57The
Group -> 3Period4 21Sc5 39Y6 57The7 89
Group -> 3Period4 21Sc5 39Y6 57The7 89Ac
español
Grupo -> 3
Grupo -> 3Periodo
Grupo -> 3Periodo4 21
Grupo -> 3Periodo4 21Sc
Grupo -> 3Periodo4 21Sc5 39
Grupo -> 3Periodo4 21Sc5 39Y
Grupo -> 3Periodo4 21Sc5 39Y6 57
Grupo -> 3Periodo4 21Sc5 39Y6 57La
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89Ac
I gotta pick 4 last question to pass :,) pls help:>
whoever answers first will be marked brainliest unu
Answer:
Explanation:
heat up the solvent
increse the pressurre of the mixture
add more solute
agitate
HCO3− + H2S → H2CO3 + HS−
In the reaction above, what is the Bronsted-Lowry acid?
Answer:
H₂S is the proton donor => Bronsted Acid
Explanation: