Volume of H₂O added = 175 ml
Further explanationGiven
100 gm of a 55% (M/M) and 20% (M/M) nitric acid solution
Required
waters added
Solution
starting solution
mass H₂O = 45%=45 g
%mass of H₂O in new solution = 100%-20%=80%
Can be formulated for %mass H₂O :
[tex]\tt \dfrac{45+x}{100+x}=80\%\\\\45+x=0.8(100+x)\\\\45+x=80+0.8x\\\\35=0.2x\rightarrow x=175~g[/tex]
For water mass=volume(density = 1 g/ml)
So volume added = 175 ml
PLEASE HELP!! ASAP!! WILL MARK BRAINLIEST!!!
Which physical property is found in alkali metals that isn't found in alkaline earth metals?
Question 6 options:
Alkali metals have two electrons in their outer orbital.
Alkali metals bond directly with carbon to form carbides.
Alkali metals are soft and have low melting points.
Alkali metals are diamagnetic.
Answer:
Alkali metals are soft and have low melting points.
Squeeze out juice from an unripe orange. Put tiny piece of Zinc or Aluminum foil into the juice. Leave the mixture for a few minutes. State and explain your observation.
Answer:
A colorless odorless gas evolves
Explanation:
Orange juice is highly acidic. Unripe orange juice is even more acidic! As a result of this, unripe orange juice irritate the digestive tract.
We know that metals that are high up in the activity series evolves hydrogen gas when in contact with acids.
Hence, given the low pH of unripe orange juice, zinc or aluminium will evolve colorless odorless hydrogen gas after some minutes.
Read the scenario, then answer the questions. A 2 kg ball is thrown upward with a velocity of 15 m/s. What is the kinetic energy of the ball as it is being thrown? J
Answer:
225 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 2 \times {15}^{2} \\ = 1 \times 225 \\ = 225 \: \: \: \: \: \: \: \: [/tex]
We have the final answer as
225 JHope this helps you
Answer:
225 J for both answers
Explanation: :)
Plastic is used to cover the copper wire in the power codes of appliances because plastic differs from copper in _________
Answer:
in copper from different plastics because appliances of codes to power day in wire copper the cover to use to plastic
SHOW WORK
A person weighs 150 lbs, what is that weight in kg?
Refer to the electron distribution to answer 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹. What would be the period or series number of the atom?
A.6
B.5
C.4
D.3
I need the answer now plss help
C.5
Given:
Electron distribution: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹.
A number of electrons present in valence shell of penultimate Shell represents the group of elements.
For s block elements: No. of group=number of valence shell electron.
p block elements: no. of group= 2 + 10 + number of valence electrons.
d block elements: no. of group= number(n-1)d electrons + number of electrons in nth shell.
Here, the differential electron is in p orbital hence, it belongs to p block
No. of group= 2+ 10 + 3=15 i.e. 15th group or VA group.
Therefore, the correct option is B.
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For the reaction 2H 2 +O 2 2H 2 O calculate the percent yield if 860. of water is produced when 100. g of hydrogen react with an excess of oxygen?
The percent yield : 95%
Further explanationGiven
Reaction
2H₂+O₂ ⇒2H₂O
Required
The percent yield
Solution
mol of Hydrogen(as a limiting reactant) :
[tex]\tt \dfrac{100}{2}=50[/tex]
mol H₂O based on H₂ , and from equation mol ratio H₂:H₂O=2 : 2, so mol H₂O = 50
Mass of water(theoretical yield) :
[tex]\tt mass=50\times 18=900~g[/tex]
[tex]\tt \%yield=\dfrac{860}{900}\times 100\%=95\%[/tex]
What is true about elements that are in the same column group or family
The given question is incomplete. The complete question is:
Which is true of Elements on a periodic table in the same group (family)?
A; Elements in the same family have similar chemical properties because they have the same number of electron shells.
B; Elements in the same family have similar chemical properties because they have the same number of valence electrons.
C; Elements in the same family have few similar properties as they have different numbers of electron shells.
D; Elements in the same family are always the same type of Elements and have the same number of protons.
Answer: B; Elements in the same family have similar chemical properties because they have the same number of valence electrons.
Explanation:
Elements are distributed in groups and periods in a periodic table.
Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons. The chemical reactivity of elements is governed by the valence electrons present in the element.
Example: Flourine, chlorine and bromine are elements which belong to Group 17. They have 9, 17 and 35 electrons respectively and contain 7 valence electrons each and need one electron to complete their octet.
if you cant see the image please let me know. last time i put an image someone said its blurry.
Answer:
no , it's clear like a mirror
there's is nothing blurred
A bicyclist travels the first 800 m of a trip with a speed of 10 m/s, the next 500 m with an
average speed of 5 m/s and the final 1200 m at a speed of 13 m/s. Find the average speed of
the bicyclist for this trip.
Answer:9.18 m/s
Explanation:
The average speed for the entire trip is found ......total distance/total time. Remember r*t=d, so divide both sides by t and get r = d/t.
So the cyclist went 800+500+1200 m = 2500 m for total distance.
10t =800 leads to t=80 sec
5t=500 leads to t=100 sec
13t = 1200 leads to t = 92.3 sec
total time is 272.3 sec
Average speed for the entire trip is 2500 / 272.3 = 9.18 m/s
Draw a Lewis structure showing how two oxygen atoms share two pairs of electrons.
Answer:
See explanation
Explanation:
A Lewis or dot structure shows the electrons on the valence shells of the bonding atoms as dots.
The method was developed by Sir G.N Lewis.
Oxygen is a diatomic molecule as shown in the image attached to this answer. There are two unshared electrons on each oxygen atom as well as four shared electrons
The sharing of electrons between the two oxygen atoms results in the completion of the octet and thereby stabilizing the atoms.
Oxygen has been a group 6A element consisting of 6 valence electrons. In order to attain the stable configuration, the atom of oxygen has been required to gain two electrons.
The oxygen shares its electrons with another oxygen atom and forms a covalent bond. The resulted bond has been able to stabilize the structure.
The image attached shows the lewis dot structure of the oxygen atom. The sharing of electrons between the two oxygen atoms results in the completion of the octet and thereby stabilizing the atoms.
For more information about the lewis dot structure, refer to the link:
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1) Why are most fossils found in sedimentary rocks? *
10 points
A. Sedimentary rocks are not very old.
B. Organisms live only in areas with sedimentary rock
C. Organisms can be preserved in sedimentary rock
D. Sedimentary rocks are found only if the surface of the ground.
Answer:
i think it might be c
Explanation:
i'm not positive though
Answer:
C
Explanation:
Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains.
convert 0.0054 Megasec (Msec) to Hectosec (Hsec)
i'm very confused with conversions in general but if someone could solve this and explain a little that'd be SO SWAG.
What is the name of: CH3-CH(CH3)-CH2- alky group?
isopropyl
propyl
sec-butyl
butyl
Answer:
propyl
Explanation:
CH3-CH(CH3)-CH2 is a propyl group, the halogen is bromine thus the common name is propyl bromide
You have 1.2 moles of NH 4 NO 3 in a 6 M solution. How many liters is that?
A) 0.5 L
B) 0.72 M
C) 0.72 L
D) 2 L
Answer:
Volume = 0.2 L
Explanation:
Given data:
Number of moles of NH₄NO₃ = 1.2 mol
Molarity of solution = 6 M
Volume of solution = ?
Solution:
Formula:
Molarity = number of moles / volume of solution
by putting values,
6 M = 1.2 mol / Volume
Volume = 1.2 mol / 6 mol/L
Volume = 0.2 L
How can you turn mechanical energy into electrical energy
Answer:
In a turbine generator, a moving fluid—water, steam, combustion gases, or air—pushes a series of blades mounted on a rotor shaft. The force of the fluid on the blades spins/rotates the rotor shaft of a generator. The generator, in turn, converts the mechanical (kinetic) energy of the rotor to electrical energy.
Explanation:
Hope this helps!
Brain-List?
S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2O
How many moles of HNO3 must react to form 14.5 moles of H2O?
Answer:
43.5 moles of HNO₃.
Explanation:
The balanced equation for the reaction is given below:
S + 6HNO₃ —> H₂SO₄ + 6NO₂ + 2H₂O
From the balanced equation above,
6 moles of HNO₃ reacted to produce 2 moles of H₂O.
Finally, we shall determine the number of mole of HNO₃ required to produce 14.5 moles of H₂O.
This can be obtained as illustrated below:
From the balanced equation above,
6 moles of HNO₃ reacted to produce 2 moles of H₂O.
Therefore, Xmol of HNO₃ will react to produce 14.5 moles of H₂O i.e
Xmol of HNO₃ = (6 × 14.5)/2
Xmol of HNO₃ = 43.5 moles
Therefore, 43.5 moles of HNO₃ is required to produce 14.5 moles of H₂O.
Help me asap it’s for my chem
How many moles are in 1.806 x 1024 molecules of bromine?
2.999 mol Br
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.806 × 10²⁴ molecules Br
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]\displaystyle 1.806 \cdot 10^{24} \ molecules \ Br(\frac{1 \ mol \ Br}{6.022 \cdot 10^{23} \ molecules \ Br} )[/tex] = 2.999 mol Br
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
Our final answer is already in 4 sig figs, so there is no need to round.
Answer:
[tex]\boxed {\boxed {\sf About \ 2.999 \ moles \ of \ bromine}}[/tex]
Explanation:
To convert from moles to molecules, we must use Avogadro's Number.
[tex]6.022*10^{23}[/tex]
This tells us the number of particles (atoms, molecules, ions, etc) in 1 mole. In this problem, the particles are molecules of bromine in 1 mole of bromine.
[tex]6.022*10^{23} \ molecules \ Br / 1 \ mol \ Br[/tex]
1. Convert from moles to molecules
Use Avogadro's number as a fraction or ratio.
[tex]\frac{6.022 *10^{23} \ molecules \ Br}{1 \ mol \ Br}[/tex]
Multiply this fraction by the given number of bromine molecules.
[tex]1.806 *10^{24} molecules \ Br *\frac{6.022 *10^{23} \ molecules \ Br}{1 \ mol \ Br}[/tex]
Flip the fraction so the molecules of bromine can cancel out.
[tex]1.806 *10^{24} \ molecules \ Br* \frac{1 \ mol \ Br}{6.022 *10^{23} \ molecules \ Br}[/tex]
[tex]1.806 *10^{24} * \frac{1 \ mol \ Br}{6.022 *10^{23}}[/tex]
Multiply and condense the expression into 1 fraction.
[tex]\frac{1.806 *10^{24} \ mol \ Br}{6.022 *10^{23} }[/tex]
Divide.
[tex]2.999003653 \ mol \ Br[/tex]
2. Round
The original measurement, 1.806*10^24 has 4 significant figures (1, 8, 0, and 6). We must round our answer to 4 sig figs. For the answer we found, that is the thousandth place.
[tex]2.999003653 \ mol \ Br[/tex]
The 0 in the ten-thousandth place tels us to leave the 9 in the thousandth place.
[tex]\approx 2.999 \ mol \ Br[/tex]
There are about 2.999 moles of bromine in 2.806 *10^23 molecules.
Which type of matter would transmit sound
waves fastest?
A. air at 5°C
B. air at 20°C
C. ice at 0°C
.D. seawater at 20°C
C.ice at 0 degree
Explanation:
because sound transmit faster in solid medium as there molecules are cosely packed
Answer:
The Answer to this question is given below in this explanation section.
Explanation:
"C" option is correct
"ice at 0°C"
sound waves can only travel through a solid,liquid or gas medium.They travel fastest in solids,then liquid and slowest in gases.
Three phases of matter(gas,liquid and solid) sound wave travel in the slowest through gases fastest through solids.Sound wave need to travel through a medium such as solid liquid and gases.The sound wave move through each of these medium by vibrating the molecule in the matter.The molecule in solid are packed very tightly.Liquid as not packed are tightly.And gases are very loosely packed.This enables sound to travel much faster through a solid than gas.Sound travel about four time faster and further in water than it does in air.Sound waves travel about thirteen times faster in wood than air.They also travel faster on hotter days as the molecule bump into each other more often then when it is cold.Sound travels more quickly through solid then through liquids and gases because the molecules of a solid are closer together and,therefore can transmit the vibration faster.sound travels most slowly through gases because the molecule of a gas are farthest apart.
How do you find the precipitate in chemistry?
Answer: An ionic solution is when the ions of a compound have dissociated in an aqueous solution. A reaction happens when you mix two aqueous solutions. This is when you find out if a precipitate will form or not. A precipitate forms if the product of the reaction of the ions is insoluble in water.
Explanation: I think ;>;
identify the names of the reactants and products in the reaction.
CaCO3 -> CaO + CO2
Answer:
Name of the reactant --- Calcium CarbonateName of the product --- Calcium oxide and Carbon dioxideThe names of the reactant and products are:
1. The name of the reactant is calcium trioxocarbonate (iv) (CaCO₃)
2. The names of the products are:
a. Calcium oxide (CaO)
b. Carbon (iv) oxide (CO₂)
In a chemical equation, the reactants are located on the left hand side (LHS) while the products are located on the right hand side (RHS)
With the above information, we can determine which is the reactant and which is the product in the question given above. This can be obtained as follow:
CaCO₃ —> CaO + CO₂
Reactant => CaCO₃Products => CaO and CO₂The name of CaCO₃ is calcium trioxocarbonate (iv).
The name of CaO is calcium oxide.
The name of CO₂ is carbon (iv) oxide
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types of hardness water
Answer:
A water repellent protein that divides into hard and soft types
H2O2 → H2O + O2 as a balanced equation
Answer:
2H2O2 → O2 + 2H2O
Explanation:
2H2O2
H : 2x2= 4
O : 2x2=4
O2 + 2H2O
H : 2x2=4
O : 2+2=4
First, be sure to count all of H and O atoms on each side of the chemical equation. Once you know how many of each type of atom you have you can only change the coefficients (the numbers in front of atoms or compounds) in order to balance the equation.
An airplane traveling 245 m/s east experienced turbulence, so the pilot decided to slow down to 230 m/s. It took the pilot 7 seconds to get down to this speed. What is the acceleration of the plane? (Round your answer to the nearest integer.)
–2 m/s2
2 m/s2
67 m/s2
–67 m/s2
The acceleration of the plane : -2 m/s²(negative=deceleration)
Further explanationGiven
vo=245 m/s
vt=230 m/s
t = 7 s
Required
The acceleration
Solution
Motion with constant acceleration
[tex]\tt v_t=v_o+at[/tex]
Input the value
[tex]\tt 230=245+a.7\\\\-15=7a\Rightarrow a=-2.14\approx rounded~-2~m/s^2[/tex]
Answer:
-2m/s²Explanation:
Edge 2020
Which of the four elements is most likely to form cations in its reactions?
OA Nh
OB Ts
Oc Mc
OD. Og
Answer: It’s Nh !!!
Explanation:
Alkali metals and alkaline earth metals always produce cations, while halogens always produce anions. so, option A is correct.
What is cation ?A cation has a net positive charge because it contains more protons than electrons. One or more electrons must be lost in order for a cation to develop normally, these electrons are drawn away by atoms having a larger attraction for them.
Main-group elements often produce cations with a charge equal to the group number as they move from the extreme left to the right on the periodic table. To put it another way, group 1 elements produce 1+ ions, group 2 elements produce 2+ ions, and so on.
Cations, which have a positive charge, are created when electrons are lost. Anions, which have a negative charge, are created when electrons gain energy.
Thus, option A is correct.
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What is the molecular formula of the compound with a molecular weight of 112 g/mol and percent composition: 85.6% C and 14.4% H?
Select one:
a.C2H4
b.CH2
c.C4H8
d.C8H16
Explanation:
Mass of C = 112g * (85.6/100) = 95.87g
Moles of C = 95.87g / (12g/mol) = 8
Mass of H = 112g * (14.4/100) = 16.13g
Moles of C = 16.13g / (1g/mol) = 16
Hence the compound is C8H16. (D)
How does Avogadro's number relate to a mole?
A. Avogadro's number is used to measure mass, and a mole is used
to count particles.
B. A mole is a larger amount than Avogadro's number.
C. Avogadro's number represents the number of particles in one
mole.
O
D. Avogadro's number applies to any item, but a mole can only be
used to count atoms.
Answer:
C.) Avogadro's number represents the number of particles in one
mole.
Explanation:
Considering the definition of Avogadro's number, the correct answer is option C. Avogadro's number represents the number of particles in one mole.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.
Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression.
Avogadro's number applies to any substance.
Finally, the correct answer is option C. Avogadro's number represents the number of particles in one mole.
Learn more about Avogadro's Number:
brainly.com/question/11907018?referrer=searchResults brainly.com/question/1445383?referrer=searchResults brainly.com/question/1528951?referrer=searchResultsIn a chemical reaction which cannot occur:
Select one:
a. new elements are formed
b. heat is released
c. light is produced
d. a temperature change
Explanation:
Light can't get produced whilst a chemical reaction.
A compound with the empirical formula CH2 was found to have a molar mass of approximately 84g. What is the molecular formula of the compound?
Answer:
C6H12
Explanation:
Molar mass of C =12.0 H=1.0
12x + 2(1x) = 84
x = 6
so it should be C6H12
The molecular formula of the compound will be C₇H₁₄.
What is the empirical formula?The empirical formula of the compound gives the simplest ratio of the number of different elements present in a compound. The molecular formula of the compound provides the actual number of each element present in a compound. This formula is generally used and can be determined as a multiple of the empirical formula of a compound.
The empirical formula offers the ratio of the number of each atom in a given compound. The composition of a compound is directly determined by its empirical formula.
Given, the empirical formula of the compound is CH₂.
The empirical formula mass of the compound = 12 + 2 = 14 g
The molar mass of the compound = 84 g
The multiple will be = 84/12 = 7
The molecular formula of the compound = (CH₂)₇ = C₇H₁₄
Therefore, the molecular formula of the compound is C₇H₁₄.
Learn more about the empirical formula, here:
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