Answer:
Some properties, such as solubility, melting point, boiling point, and density are independent of the amount of substance being examined. These properties are known as intensive properties and are used to identify a substance. The density of a substance is defined as the mass per unit volume.
Explanation:
Writing Chemical Equations
Write and balance the equation showing the reaction between zinc metal and aqueous sulfuric acid to form aqueous zinc sulfate, sulfur dioxide gas, and water.
Answer:
1) 1 N2 + 3 H2 2 NH3
2) 2 KClO3 2 KCl + 3 O2
Explanation:
That would help!! Stay safe
as i increase the amount of solute without changing the amount of solvent i increase the solutions....?
Answer:
concentration?
Explanation:
solute = The dissolved substance in a solution.
solvent = The liquid in which the solute dissolves to form a solution.
Answer:
the only marked thing was in new game for the quiz that link yes to be in a relationship
Explanation:
you followed a 1 or a 1 year of high.
HELP! I DON'T UNDERSTAND!?
Answer:
DECREASES THIS IS OBVIOUS
Explanation:
Help!!!!
A termplate of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is
shown.
lonic
Bond
Covalent
Bond
A
C
Which of the following characteristics can be written only in space B?
O Occurs in substances that have at least one non-metal
O Occurs in substances that have a repeating lattice structure
O Occurs in substances that have discrete molecular structure
O Occurs in substances that have high melting points
Answer: it ISNT occurs in substances that have discrete molecular structure
Explanation:
I took the test
The characteristics that can be written only in space B is they occur in substances that have at least one non-metal. The correct option is A.
What is ionic and covalent bond?Ionic bonds are formed when two electrically charged elements shred their charged ions. Covalent bonds are formed when there is a mutual sharing of electrons between the atoms.
One condition that is similar in both is both bonds needed one non-metal to form the bond.
Thus, the correct option is A, which occurs in substances that have at least one non-metal.
Learn more about the ionic and covalent bonds, here:
https://brainly.com/question/12663276
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How can you change a objects state of matter
Answer:
Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.
Explanation:
I have no idea how to do this, any help would be appreciated
We have an aqueous solution that contains 35% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 118 g/mol. The density of the solution is observed to be 1.4 g/mL. What is the molarity of Z in this solution
Answer:
4.15 M
Explanation:
In order to find the molarity of a stock solution of Z, we use the formula;
Co = 10pd/M
where;
p = percentage by mass of Z
d = density of Z
M= molar mass of Z
Substituting values;
Co= 10 * 35 * 1.4/118
C0= 4.15 M
A 10 gram ball is held 4 meters from the ground.
Determine the [OH−] of a solution that is 0.150 M in CO2−3.
Kb(CO32−)=1.8×10−4
The [OH−] of a solution : 0.0052 M
Further explanationKb is the base ionization constant
LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)
[tex]\rm Kb=\dfrac{[L][OH^-]}{[LOH]}[/tex]
Dissociation of weak base of CO₃²⁻ :
Reaction
CO₃²⁻ + H₂O⇒ HCO₃⁻ + OH⁻
use ICE method :
I : 0.15 0 0
C : x x x
E : 0.15-x x x
[tex]\tt Kb=\dfrac{[HCO_3^-][OH^-]}{[CO_3^{2-}]}\\\\1.8\times 10^{-4}=\dfrac{x^2}{0.15-x\approx 0.15}\\\\x^2=1.8\times 10^{-4}\times 0.15\\\\x=0.0052[/tex]
g If you forgot to fill the tip of the NaOH buret, took your initial reading and then completed the titration, what measurement would be affected
Answer:
The volume of NaOH used
Explanation:
The tip of the buret is part of its calibration. If this tip is not filled before taking the initial reading, the volume of NaOH used at the end of the titration would be inaccurate.
In order to avoid this, the valve of the buret should be opened and the NaOH allowed to displace whatever air that might have been trapped at the tip before the initial buret reading is taken and the titration is carried out.
which of the following causes acid rain?
Answer:
acid and rain
Explanation:
acid rain
Answer:
acid rain is checimal reaction to sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain. Bascalliy it's because of sulfur dioxide and nitrogen
Explanation:
Which of the following statements is false about drawing Lewis structures?
Answer:
c. N, P, and As can sometimes share more than 8 e-
Explanation:
Lewis structures are diagrams that show the valence electrons of atoms within a molecule. Valence electrons play a major role while drawing Lewis structures as only valence electrons can be shared with another molecule to form a bond.
N, P, and As can not share more than 8 e- because they have less valence electrons in their outer shell. N has only one valence electron, P and As has only 5 valence electrons so they can not share more than their valence electrons.
Hence, the correct answer is "c. N, P, and As can sometimes share more than 8 e-".
Help me on this question esplain
Answer:
They have the same number of valence electrons (5) so the body assumes they are the same element.
Nobody answering my questions what the answer givng brainliest
Answer: I think it’s B. Because as you can see from the picture there are layers
Explanation:
I think but just in case ask for a second opinion
Answer:
C. Air bubbles
Explanation:
Cant be A because.... you cant freeze a tempreature
Cant be B because... organism types cant show precipitation patterns.
Cant be D because....well it could be D, but there isnt a way to prove humans increased the tempreature
ITS C hope it helps :)
I also got this question before
What is the term for the process by when humans breed parents
organisms with desirable traits in order to produce offspring with those
traits? *
Explanation:
Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.
N3- has:
A. 7 protons and 4 electrons
B. 7 protons and 10 electrons
C. 7 protons and 11 electrons
D. 7 protons and 12 electrons
Answer:
B. 7 protons, 10 electrons
Explanation:
hope this helps :)
7. Intermolecular forces hold the oxygen and hydrogen atoms together in a water molecule.
a. TRUE
b. FALSE
(N2 & O2 & Ar & CO2...)
an element compound or mixture?
Answer: Mixture
Explanation:
Element is a pure substance which is composed of atoms of similar elements.
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Example: Air which conatins a mixture of [tex]N_2[/tex], [tex]O_2[/tex] , [tex]Ar[/tex] and [tex]CO_2[/tex]
China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D
Answer: the answer would be A
Explanation:
Answer:
A
Explanation:
An ideal gas resides in a closed cylinder (diameter is 0.5 ft) with a frictionless piston. The initial conditions are 139 mol of the ideal gas at 25°C. The piston is compressed isothermally to one third of the initial volume. The heat capacity C_v of an ideal gas is 1.5 middot R.
Required:
a. What is the heat interaction (kJ) for this process?
b. The piston now expands isothermally to 120% of the same initial volume. Will the heat interaction increase, decrease, or stay the same?
Answer:
a. 3.79e5 J
b. Decrease.
Explanation:
Hello!
a. In this case, since the heat involved during a compression-expansion isothermal process is computed via:
[tex]Q=nRTln(\frac{V_2}{V_1} )[/tex]
Now, since the final volume is one third of the initial one:
[tex]V_2=\frac{V_1}{3}[/tex]
So we can plug in now:
[tex]Q=139mol*8.3145\frac{J}{mol*K}*298.15K*ln(\frac{\frac{V_1}{3} }{V_1} )\\\\Q=-3.79x10^5J[/tex]
b. In this case, the relationship between initial and final volume is:
[tex]V_2=2.2V_1[/tex]
So the heat interaction is now:
[tex]Q=139mol*8.3145\frac{J}{mol*K}*298.15K*ln(\frac{2.2V_1 }{V_1} )\\\\Q=2.72x10^5J[/tex]
It means that the heat interaction decrease on the contrary process, it means that in a. heat was released by 3.79e5 J and in b heat is absorbed by 2.72e5 J.
Best regards!
HELPPP PLEASEEE....
How does a glass of juice become cold when you add ice to it?
aThe ice makes the glass colder so the juice becomes colder.
bThe ice cools the glass of juice because the slow moving particles in the ice cause the particles of the juice to slow down.
cIce is colder than the juice. The cold travel from cold to warm until both items are the same temperature.
dThe juice is warmer than the ice. Heat travels in one direction until both items are the same temperature.
Answer:
C.
Explanation:
The other ones just don't make sense as answers to the question
Answer:
B
Explanation:
ice molecules move slowly and cluster tightly together, they produce a low amount of heat
If you add 50 mL of 0.20 M NaOH to a 50 mL solution of 0.60 M HF, what is the pH of the resulting buffer
Answer:
pH = 2.87
Explanation:
When NaOH reacts with HF NaF and H2O are produced:
NaOH + HF → NaF + H2O
That means after the reaction moles of NaF are equal to moles of NaOH added and moles of HF are initial moles of HF - moles of NaOH added:
Moles NaOH = Moles NaF:
0.050L * (0.20mol/L) = 0.01 moles of NaF
Moles HF:
0.050L * (0.60mol/L) = 0.03 moles HF = Initial moles
0.03 moles - 0.01 moles = 0.02 moles HF
To find pH we need to use H-H equation to determine pH of the buffer:
pH = pKa + log [NaF] / [HF]
Where pH is pH of the buffer
pKa is pKa of HF-NaF buffer: 3.17
And [] could be taken as moles of each species.
That is:
pH = 3.17 + log [0.01] / [0.02]
pH = 2.87
The reaction described in Part A required 3.54 L of magnesium chloride. What is the concentration of this magnesium chloride solution?
we need the cholride solution Part B to answer your question
Which staternent is true for balanced chermical equations?
Answer:
A chemical equation expression which is...
All of the following explains how humans affect energy problems except?
Energy needs increases as human demands increase.
Humans mine more oil and coal to produce energy.
Humans are more motivated to do better in their profession.
The increase of human population adds more to energy needs.
Answer: I think its (B) Humans mine more oil and coal to produce energy.
Explanation: Hope this helps!
During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A)
An endothermic reaction
B)
An exothermic reaction
Answer:
b
Explanation:
Can someone answer 2 for me please?
Answer:
i think its b but i could be wrong
Explanation:
Answer: the answer is B it remains constant
Explanation:
The total amount of energy and matter in the Universe remains constant, merely changing from one form to another.
what tell us how much an atom wants to gain an electron ?
Answer:
more than 8 atoms wants to gain an electron
The elements fluorine (F), chlorine (Cl), and iodine (I) are all part of the same _________on the periodic table.
Explanation:
The elements Fluorine (F),Chlorine (Cl) and Iodine (I) are all part of the same Group ( i.e, Group 17 ) on the periodic table.
Answer:
Group
Explanation:
Which has higher percentage of oxygen: (Fe = 56, O = 16, C = 12) a) FeO b) FeCO3 c) Fe2O3 d) Fe3O4
B)
FeO = 56, 16, 0
FeCO3 = 56, 48, 12
Fe2O3 = 112, 48, 0
Fe3O4 = 168, 64, 0
