Answer:
I think it is
1. energy
2. respiration
Help meeeeeeeeeeeeeee
Answer:
4) 2Na + Cl2 → 2NaCl
5) 2Mg + O2 → MgO
6) 2H2 + 2O2 → 2H2O
Explanation:
4) In order for it to be well balanced, yeah you've got to add 2 in front of Na before the reaction and after the reaction.
5) Add 2 in front of Mg bcuz of the same reason in number 4 but you don't have to add 2 in front of the others bcuz it's alrd well balanced.
6) Tbh for this one, it got me staring at my cat until he freaks out but like yeahh, I tried :')
Is there a relationship between atomie radius and electronegativity? Why or why not?
Answer:
Yes
Explanation:
Electronegativity is the tendency for atoms to keep electrons closer to them. So, if the atoms are smaller there, there is a stronger pull on the electrons to keep them closer. So, the larger the atom get, due to electron shielding, it become less electro negative. I hope this help. You might get a better explanation from Khan Academy's video on Electronegativity
Answer:
A relationship is intuitively expected
Does electronegativity relate to atomic radius? A relationship is intuitively expected between electronegativity and radius: the size of an atom is determined by the distribution of electrons around its nucleus. The closer the electrons are to the nucleus, the more tightly they are bound, thus increasing the electronegativity of the atom.
Explanation:
why do we think mercury has so many tremendous cliffs?
How does a balanced chemical equation demonstrate the Law of Conservation of Mass? (1 point)
O it shows that only physical changes follow the Law of Conservation of Mass
O it shows that no atoms have been gained or lost during the reaction
O it shows that the properties of the elements stay the same after the reaction
O it shows that all compounds remain bonded after the reaction
Explanation:
A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow. enjoy
Answer:
It show that no atoms have been gained or lost during reaction
Explanation:
write a general equation for the reaction of an alkali metal with water.
Answer:
Alkali metals are highly reactive metals. These metals are that much reactive that they can even explode in the air as well. When alkali metals and water react with each other, there is a formation of metal hydroxide and the evolution of hydrogen gas.
The general representation of metal is A. so, the general equation for the reaction of an alkali metal with water is given below.
2A(solid)+2H2O(liquid) -------> 2AOH(aqeous)+H2(gas)
What does a
map
scale measure?
Answer:
Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
Explanation:
For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.
Convert 1.00 us gallon in kilometer (kL)
as you move across the periodic table atoms tend to get smaller because
Answer: because atoms have more protons
Explanation: just took the test
does the character of a bond become more covalent or ionic when the difference in electronegativity of the bonded atoms increases?
Answer:
The grater the difference in electronegativity, the more ionic the bond
yall help, i missed like a week
some of them are wrong, I need all of 1 and 2
Answer:
a. Azane
b. sulphur hexachloride
c.carbon tetrachloride
d. Carbon disulfide
e.Umbelliferone
f.Disilicon hexabromide
g. Dinitrogen trifluoride
h.
Bromine is an element that often gains an electron to become a negatively charged ion. Potassium is an element that often loses an electron to become a positively charged ion.
Why are bromine and potassium likely to react with one another?
Bromine needs to gain one more electron to have a noble gas configuration or 8 valence electrons, & potassium needs to lose one so they make a transference of electrons in an ionic bond.
What are the functions of ionic bonding?Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds.
Ionic bonding results in compounds known as ionic, or electrovalent, compounds, which are best exemplified by the compounds formed between nonmetals and the alkali and alkaline-earth metals.
The charge of a cation or anion is denoted as a superscript after the formula of the ion. A + sign denotes a positive charge resulting from loss of electrons. A - sign denotes a negative charge resulting from gain of electrons.
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hello can anyone help?
Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?
1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.
A) 1 2 and 3
B) 1 and 2 only.
C) 1 and 3 only
D) 2 and 3 only
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
A compound formed from a metal and a non-metal will have which type of bond?
A. Covalent
B. Hydrogen
C. Ionic
D. Atomic
it's an ionic bond
btw i love your profile picture never understand is one of my favorites
Which of the following is a liquid someone help!!!!!
A student makes two mixtures, both made of the same substances. What must be true of the two mixtures? A Both mixtures have the same density. B Both mixtures have the same temperature. C Both mixtures can be physically separated into its components. D Both mixtures are physically combined in the same proportions.
A student makes two mixtures, both made of the same substances. Both mixtures can be physically separated into its components. Therefore, option C is correct.
What is mixture ?A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. A mixture is the physical blending of two or more substances while maintaining their distinct identities. It can take the form of solutions or suspensions.
A pure substance is a single sort of matter that cannot be divided into other kinds of matter by any physical methods. A pure substance has a known and consistent composition at all times.
When two or more distinct substances physically join, a mixture is produced that can be dispersed back into its constituent parts. When two or more compounds combine to create a new substance that cannot be broken down into its constituent parts, a chemical reaction takes place.
Thus, option C is correct.
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hello can anyone help me with this question thx
Answer:
A. W and X
Explanation:
Because W have just one valence electron, and X have 7, so it means that W will give its electron to X and that's the definition of an ionic bond
What is the name of this alkene?
Answer:the name is cc bc it 4920 and hehe i just want points thank you
Explanation: lol did wsiw skwks thanks for points
what happens when chocolate get heated?
hope it helps
What is the element name for mg2SiO4
Answer:
forsterite
Explanation:
What syndrome did you researched
characteristics of mixtures
Answer:
The mixture has no fixed composition.
To form a mixture energy is neither produced nor evolved.
The mixture has no fixed melting points and boiling points.
the Mixture retains the properties of its components.
Components of mixtures can be separated by simple physical methods.
A student fills two syringes: one with air and the other with an equal volume of
water. After capping the syringes, the student applies the same amount of
pressure to the plungers and records observations about the change in volume.
Based on the particle model of matter, which of the following statements best
explains the student's observations that the volume of the gas decreases greatly
but the volume of the liquid does not change noticeably?*
Gases expand to fill their containers but liquids do not because particles of gases are
free to move but particles of liquids are fixed in position.
Gases take the shape of their containers but liquids do not because gas particles
have the ability to flow but liquid particles do not.
Gases can have larger changes in volume than liquids can because gas particles
expand and contract but liquid particles do not.
Gases are more readily compressed than liquids are because there is more space
between the particles in a gas than in a liquid.
Here we need to see the differences between a liquid and a gas, and how that affects the volume and effects of pressure on them.
The correct option is:
Gases are more readily compressed than liquids are because there is more space between the particles in a gas than in a liquid.
So we have two syringes, one with air and the other with water.
The student applies the same amount of pressure to both of them, but as water is denser than air, in a given change dV of volume in the syringe, the mass of water is larger than the mass of air.
This means that for the same pressure, we should expect the change in volume to be smaller in the syringe with water.
Why this happens?
Gases are more readily compressed than liquids are because there is more space between the particles in a gas than in a liquid.
This means that for the air is easier to be compressed (the distance between particles is larger, so the same pressure compresses more a gas than a liquid) and exit the syringe than for the water, and this translates to the change in volume per unit of pressure applied, which is larger for gases than liquids.
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The nucleus’ pull on its electrons, taking into account any attractions weakened by shielding is called the:
Answer:
It's called the shielding effect
Explanation:
It describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. (I hope this helps)
The attraction pull of the nucleus on its electron weakened by the shielding of the inner shell electron is called the shielding effect.
What is the shielding effect?The shielding effect is the valence electrons are shielded from the attraction toward the nucleus of an atom. The shielding effect is the resistance offered by the inner shell electrons to the attraction of the valence electrons toward the nucleus.
This effect increases down the group in the periodic table as the atomic radii also increase and remains the same in the period. This effect is generated by the electrons present in the middle of the nucleus and valence electrons act as shields that repel those outer electrons.
Therefore, the effective nuclear charge acting on the valence electrons decreases. More shielding effect causes less electronegativity of an atom. The shielding effect describes how easily the electron can be removed from the atom making it more reactive.
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19 What is the number of moles of nitrogen gas which react with 18 g of magnesium to form magnesium nitride compound ? [Mg = 24,N=14]
a) 0.25 mol 0 b) 0.5 mol C) 1 mol d) 2 mol
Answer:
0.5 mol of nitrogen gas.
Explanation:
18g of Magnesium in mol is equal to 18g/24 gmol-1 = 0.75 mol and 7g of nitrogen in mol is equal to 7g/14 gmol-1 = 0.5 mol,
Thus, When 18g of magnesium reacts with 7g of nitrogen it implies 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen. :)
The number of moles of nitrogen gas which react with 18 g of magnesium
to form magnesium nitride compound is 0.5mol.
We need to find the number of mole for magnesium and nitrogen.
Mole= mass/molar mass
Magnesium= 18g/24gmol⁻¹ = 0.75mol of Mg
Nitrogen= 7g/14gmol⁻¹ = 0.5mol of N
This implies that when 18g of magnesium reacts with 7g of nitrogen it
means 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen.
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I will make you brainless answer this 1 question pleaaeeee!
C. Point 3
Explanation:
Because it is increasing dramatically
how is an ionic compound made up of charged particles can be electrically neutral
Answer:
Ionic compounds are electrically neutral because the charges of the cations and anions that make up the compound cancel each other out. In the case of salt for example, sodium has a charge of positive one, and chloride has a charge of negative one. Together, they neutralize the compound.
Explanation:
a sheet of pure aluminum loses heat. what will happen to the aluminum atoms
Answer:
they will slow down i think
Explanation:
losing heat means it cools down so atoms are slower
1. Given the word equation:
sodium chlorate → sodium chloride + oxygen
Which type of chemical reaction is represented by
this equation?
A) double replacement
B) single replacement
C) decomposition
D) synthesis
Answer:
Decompositon
Explanation:
Sodium chlorate → Sodium Chloride + Oxygen
Sodium chlorate is reactant.
Sodium chloride + Oxygen is the product.
Definition : -
Decomposition reaction is a chemical reaction in which a single reactant breaks down to simpler products.
An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protonsand the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
x21 +ANSWER
(i) Ne-22
(ii)1s2s22p6
(iii)21.3
An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protons and the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
(i)C has 10 protons and 12 neutrons so a mass of 10 +12 =22
element 10 is Neon (Ne) so this isotope is Ne-22
(ii) they all have the sane atomic number so the same number of electrons
with an electronic structure of 1s2s22p6
(iii) A weighs 20, B weighs 21, C weighs 22
the ratio is 1:2:3
weighted average weight is therefor
(1X20 +2X21 +3X22)/6 =21.3
WILLL GIVE BRAINLIEST IF YOU ANSWERRR PLEASEEEE IM LITERALLY BEGGING YOU I PUT THIS QUESTION IN SOO MANY TIMES I HAVEN'T GOTTEN AN ANSWER PLEASEEE HELPPP
Answer:
The answer is 375.54 g of AgBr
Explanation:
Mass (g) = Concentration (mol/L) x volume (L) x Molecular Weight of AgBr (g/mol)
Mass = 2M x 1L x 187.77 g/mol
Mass = 375.54g