WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!
2. Which type of solution below has a cloudy appearance? (Choose all that apply)
A) Alloys
B) Solutions
C) Colloids
D) Suspensions
4. What is the difference between a primitive and body centered unit cell?
Answer:
b and In a primitive unit cell, particles or points are present only at the corners while in a centred unit cell, the particles or points are also present at other positions in addition to the corner
Explanation:
Use the reaction below to balance the nuclear reaction equation.
Superscript 22 subscript 11 upper N right arrow superscript a subscript z variable X plus superscript 0 subscript plus 1 e.
The isotope produced from the beta plus decay of sodium-22 is
.
Answer:
neon-22
Explanation:
i got it right..have a great day.Jesus loves you<3
The isotope produced from the beta plus decay of sodium-22 is neon 22.
What are isotope ?Isotopes are two or more types of atoms that have the same atomic number and position in the periodic table but differ in nucleon numbers because their nuclei have different numbers of neutrons.
Carbon 12 and Carbon 14 are both carbon isotopes, one with 6 neutrons and the other with 8 neutrons (both with 6 protons). Carbon-12 is an isotope that is stable, whereas carbon-14 is a radioactive isotope (radioisotope). Uranium-235 and uranium-238 are naturally occurring elements in the Earth's crust. Both have extremely long half-lives.
Different elements exist when two atoms have different numbers of protons. If two atoms have the same number of protons but different numbers of neutrons, they are referred to as isotopes. We use two terms to identify nuclides.
Thus,The isotope produced from the beta plus decay of sodium-22 is neon 22.
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H2SO4 + 2 NaOH →
Na2SO4 + 2 H20
What mass of H2SO4 would be required to react with 2.25 mol of NaOH?
Answer:
110.25grams
Explanation:
The balanced chemical equation is as follows:
H2SO4 + 2NaOH → Na2SO4 + 2H20
Based on the balanced chemical equation of the reaction given above, 1 mole of sulphuric acid (H2SO4) is required to react with 2 moles of sodium hydroxide (NaOH).
Hence, if 1 mol of H2SO4 is needed to react with 2 moles of NaOH
Then, 2.25mol of NaOH will be required to react with;
= 2.25/2
= 1.125mol of H2SO4
Using the formula, mole = mass/molar mass, we can convert the molar value of H2SO4 to its mass value.
Molar mass of H2SO4 = 1(2) + 32 + 16(4)
= 2 + 32 + 64
= 34 + 64
= 98g/mol
Therefore, mole = mass/molar mass
1.125 = mass/98
mass = 98 × 1.125
mass = 110.25grams of H2SO4
K/U_____ /13 T/I______/5
Knowledge and Understanding
1. Complete the following chart: [9 Marks]
Name (1 mark each)
Formula
Type of Compound (Ionic or Molecular) (1/2 mark each)
Diphosphorus Pentoxide
CBr4
Li2O
Silicon Dioxide
CH4 (Write the common name)
Manganese (III) Fluoride
Answer:
it shouuld be the third one down c
Explanation:
An unknown gas at standard temperature and pressure
contains 2.63 moles. What volume does this unknown gas
Occupy?
Answer
V2 = 24.872
Explanation:
If 3.7 moles of propane are at a temperature of 28°C and are under 154.2 kPa of pressure, what volume does the sample occupy? ... 145 g of carbon dioxide have a volume of 34.13 dmº What is the temperature ... a pressure of 3.11 atm, a 276 g sample of
an unknown noble gas occupies 13.46L
difference between electroplating and sacrificial protection
Answer:
Explanation:
Sacrificial protection is a corrosion protection method in which a more electrochemically active metal is electrically attached to a less active metal. The highly active metal donates electrons to replace those which may have been lost during oxidation of the protected metal.
Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.
when pressure is kept constant then the temperature varies with volume
a. directly
b. inversely
c. none of these
d. both a and b.
Answer:
A
Explanation:
Which statement correctly describes a solution
with a pH value of 10?
a. It would turn litmus red.
b. It would turn methyl orange red.
c. It would turn thymol blue yellow.
d. It would turn phenolphthalein pink.
Answer:
d. It would turn phenolphthalein pink.
Explanation:
Raise the temperature of 2 g of water 2°C.
Answer:
This heat requirement we can calculate by following relationship..
Q = m*C*∆T
We have, m = 2gm, C = 1 cal/g-degC, ∆T = 2 degC
Putting all these values in above equation we get
Q= 2*1*2 = 4 cal
What is the complete ionic equation for Hydrochloric acid and sodium hydroxide
Hydrochloric acid: HCl(aq)
Sodium hydroxide: NaOH(aq)
The two substances react in an acid-base neutralization reaction to produce aqueous sodium chloride and liquid water.
The complete ionic equation is:
H⁺(aq) + Cl⁻(aq) + Na⁺(aq) + OH⁻(aq) → Na⁺(aq) + Cl⁻(aq) + H₂O(l).
Calculate the [H3O+] of an aqueous solution that is 1.94 x 10-7 Min OH.
Enter your answer in scientific notation. Be sure to answer all parts.
_x 10^_M
How many moles of O are present in 3.5 mol of Al2(SO4)3
Answer:
42 mol
Explanation:
In the problem there are 4 mols of O in the parenthesis but you multiply by 3 since there are 3 moles of SO4, you them times this by 3.5 since there are 3.5 mols of the entire substance.
Now balance the chemical
reaction by providing the correct
whole number coefficients:

Answer:
2(C4H10)+13(O2)->8(CO2)+[](H20)
Explanation:
sorry i couldn’t get the last one
The chemical reaction by providing the correct whole number coefficients: number coefficients will be 2C4H10 + 13O2 WILL GIVE 8CO2 + 10H2O .this will be the balanced reaction.
What is the balanced reaction?Balance elements in the equation other than O and H. Balance the oxygen atoms by adding the appropriate number of water ( H 2O) molecules to the opposite side of the equation.
Balance the hydrogen atoms (including those added in step 2 to balance the oxygen atom) by adding H + ions to the opposite side of the equation.
When writing an equation for a chemical reaction, the two sides of the equation should balance and need the same number of each kind of element on both sides.
Therefore the given chemical equation is balanced in the following form, 2C4H10 + 13O2 WILL GIVE 8CO2 + 10H2O
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When 1 mol of Zn reacts with 0.8 mol of HCI, which of the following will be true?
Answer:
Zn is the excess reagent
Explanation:
Lithium nitride LiN LiN3 Li3N
Answer:
Li3N
Explanation:
Lithium nitride is a compound with the formula Li₃N
Hope this helped!!!
Answer:
C
the next answer is B
the next one is C
Explanation:
density is the ratio of mass per unit volume. fact or bluff
Answer:
Fact
Explanation:
16. The exothermic reaction between liquid hydrazine (N,H) and liquid hydrogen peroxide is used to
fuel rockets in the chemical equation: N,H,+ 2 H,0,0 → N,®) + 4H2O(g). What
mass of water vapor is produced from the reaction of 2.7747 moles of hydrogen peroxide?
Help!!! In a test
Answer and Explanation:
N2H2 + H2O2 = N2 + 2 H2O 2.7747 moles of HOOH (hydrogen peroxide)=5.5494 moles of H2O
In a single carbon bond, two carbon atoms share
pair of electrons.
Answer:
C-C
A carbon has 4 valence electrons meaning it can share 4 electrons and is in short of 4 electrons to fill it outer energy shell making it 8. Which results to 2 double covalent bonds ,meaning there was a sharing of 2(4) = 8 electrons . Hope this helps . Your statement above is true .
HELP ASAP!!!!
Identify each substance as a molecular compound or an
ionic compound, and then calculate its molar mass.
a. Sr(NO3)2
b. (NH)3PO4 C. C12H22O11
Answer:
a. ionic, 211.62g/mol
b. molecular, 149g/mol
c. molecular, 342g/mol
Explanation:
Ionic Compound: These are compounds (2 or more elements) where atoms of the element have lost or gained electrons, thus they are ions, thus the name ionic. An easy way to identify ionic compounds is to see if there are any metals. Metals tend to give up their electron to a non-metal. It maybe helpful to familiarize which parts of the periodic table have metals and non-metals.
Molecular Compounds: These are compounds (2 or more elements) that are neutral. An easy way to identify them is that the compound is made up of just non-metals.
Molar Mass is the masses of each individual element in the compound. Refer to the periodic table for the masses and add them up carefully, remember to multiply their mass based on how many molecules there are in the compound, like for a, we can find the mass of NO3, but we need to multiply it by 2 since we have 2 molecules of NO3.
a. Sr(NO3)2
Sr= 87.62
NO3= 14 + (3 x 16)= 62
Sr + 2 (NO3)
87.62 + (2 x 62)= 211.6
b. (NH4)3PO4
NH4= 14 + 4 = 18
PO4= 30.97 + (4 x 16)= 94.9
(NH4 x 3) + PO4
(18 x 3) + 94.9 = 149
c. C12H22O11
(12 x C) + (22 x H) + (11 x O)
(12 x 12) + (22 x 1) + (11 x 16)
144 + 22 + 176= 342
A balloon has a volume of 5.0 L at a pressure of 0.863 atm. What is the volume of the balloon in
liters if the atmospheric pressure is reduced to 0.321 atm?
Answer:
V₂ = 13.44 L
Explanation:
Given that,
Initial volume, V₁ = 5 L
Initial pressure, P₁ = 0.863 atm
Final pressure, P₂ = 0.321 atm
We need to find the final volume of the balloon. The relation between the volume and pressure is given by :
[tex]P_1V_1=P_2V_2[/tex]
Where
V₂ is the volume of the balloon
So,
[tex]V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{0.863 \times 5}{0.321 }\\\\V_2=13.44\ L[/tex]
So, the final volume of the balloon is equal to 13.44 L.
How many atoms of aluminium are contained in 2.75 mol
1.66 × 10²⁴ atoms Al
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 2.75 mol Al
[Solve] atoms Al
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 2.75 \ mol \ Al(\frac{6.022 \cdot 10^{23} \ atoms \ Al}{1 \ mol \ Al})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 1.65605 \cdot 10^{24} \ atoms \ Al[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.65605 × 10²⁴ atoms Al ≈ 1.66 × 10²⁴ atoms Al
Help, please :)
What type of bond is being shown here?
A. Single covalent
B. Double covalent
C. Triple covalent
D. None
Answer:
Double bond, Double Covalent
Explanation:
Hope this helps!
A sample of gas has a pressure of 100.0 KPa and 25C. Calculate the pressure if the temperature is changed to 125C while the volume remains constant.
Answer:
133.56kPa
Explanation:
Applying Pressure Law,
P/T = P'/T'....................... Equation 1
Where P = Initial pressure, T = Initial Temperature, P' = Final pressure, T' = Final Temperature.
From the question, we were asked to calculate P'
There, we make P' the subject of the equation
P' = PT'/T...................... Equation 2
Given: P = 100kPa, T = 25°C = (273+25) = 298K, T' = 125°C = (273+1250K = 398 K
Substitute these values into equation 2
P' = (100×398)/298
P' = 133.56kPa
Hence the pressure is 133.56kPa
Add the missing words !! (Provided is the lines and it signifies the number of words) 1.) It is the composition of all compounds -> _ _ _ _ _ 2.) It describes the crystals of ionic solids -> _ _ _ _ _ 3.) What is shared unequally in a polar bond? -> _ _ _ _ _ _ _ _ 4.) Number of shared electrons in N2 -> _ _ _ 5.) What happens to electrons in the formation of ionic bonds? -> _ _ _ _ _ _ _ _ 6.) What are these intermolecular forces that caused low melting and boiling points? -> _ _ _ _ 7.) What must be added to break bonds? -> _ _ _ _ _ _
Answer:
1. Atoms
3. Electrons
4. 3 pairs
5. Complete transfer of electrons
6. London dispersion forces
7. Energy
Explanation:
Atoms are the building block from which a compound is formed so we can say that composition of compounds depends on type of atoms. Electrons are shared unequally in a polar bond due to difference in electronegativity values of bonded atoms. There are 3 pairs of electrons are shared in nitrogen molecule. The transfer of electrons occurs from one atom to another in the formation of ionic bonds. London dispersion forces are the intermolecular forces that is responsible for the low melting and boiling points of a molecule or compound. Energy is needed to break the bonds that is present between the two bonded atoms.
Which equation represents a fusion reaction?
Please answer asap
(Look at picture)
Answer:c
Explanation:
mass of 12 helium atom
Can someone help me plss
Answer:
the 3rd option is correct I promise
Explanation:
matter can not be created or destroyed no matter what, most important rule is chemistry
3. Components in a heterogeneous mixture are not in the same phase or the composition of the mixture is
a) uniform
b) transparent
c) uneven
4. Mixing sand and salt in water then passing it through a filter separates out the sand because salt
in water and sand does not.
a) reacts
b) dissolves
c) disappears
Answer:
c
Explanation:
What is one definition of a base?
O A. A substance that increases the hydroxide ions in a solution
B. A substance that forms a salt when it dissolves in water
O C. A substance that stops the flow of electrons when dissolved
O D. A substance that makes the pH of a solution more acidic
Answer:
the answer is A
Explanation:
The base increases Hydroxide ions in a solution e.g NaOH
Answer:
A
Explanation:
What is the acid dissociation constant for an acid at equilibrium, HX = H+ +X- ?
Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for an acid at equilibrium.
What is chemical equilibrium?Chemical equilibrium is the condition in which no net change in the amounts of reactants and products occurs.
HX(aq) ↔ H+(aq) + X-(aq)
[H+] = [X-]
Ka = [H+] [X-] ÷ [HX]
Hence, Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for acid at equilibrium.
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