Answer:
3.5
Explanation:
100 mL of an NaOH solution is neutralized by 50 mL of a 0.5M HCl solution. What is the morality of the NaOH solution?
Answer:
0.25M
Explanation:
acording to M1V1/M2V2=n1/n2
What is the name of this molecule?
Η Η
H-C=C-C-C-H
H H
A. 3-butyne
B. 4-butyne
C. 2-butyne
O D. 1-butyne
D. 1-butyne.
The name of this molecule is 1-butyne.
The name of this molecule is 1-butyne. D is correct.
What is IUPAC nomenclature?IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as given by the International Union of Pure and Applied Chemistry (IUPAC).
There are 3 main parts of IUPAC nomenclature -
1. Prefix
2. Root word
3. Suffix
We have to select the longest continuous chain in a compound and give prefixes as the substituents. Root word will the part which depends on no. of carbon atoms such as meth or eth. And in suffix we focus on type of carbon chain whether it is saturated or not and also the functional group.
Here, we can say that the numbering will be started from the carbon having triple bond and it is present at first position.
Therefore, The name of this molecule is 1-butyne. D is correct.
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What type of particle has no electrical charge? A. proton B. neutron C. electron D. nucleus
Answer:
B
Explanation:
Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.
how many moles of cacl2 are in 10.5g of cacl2?
Answer:
0.09460823181719888
Explanation:
Round to whatever decimal point is needed for your answer.
help me get this right no links
Answer:
D
Explanation:
Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes!!!
Some species of animals, including some salamanders and crickets, spend their entire lives deep in caves where no sunlight reaches. Predict the main source of energy for these organisms.
Answer:
water
Explanation:
the reason I think water is because water is probably the only source of nutrients which breaks down to energy
Read the given expression.
Effective nuclear charge = atomic number - x
Which of the following explains the identity of X and its trends across a period? (5 points)
X is the screening constant, and it increases across a period.
X is the screening constant, and it remains constant across a period.
X is the number of outermost electrons, and it increases across a period.
X is the number of outermost electrons, and it remains constant across a period.
Answer:
Option 2: X is the screening constant, & it remains constant across a period.
Explanation:
I took the test and got the question correct :)
As we move across the period, X is the screening constant, and it remains constant across a period.
As we move across the period, the size of atoms become smaller because of an increase in the size of the nuclear charge. This leads to a decrease in atomic radius.
As the size of atom decreases, the screening effect on the outermost electron decreases accordingly. Hence, as we move across the period, X is the screening constant, and it remains constant across a period. This is because, no new shells are added across the period.
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PLEASE HELP! CHEMISTRY!
Solution A has a pH of 2.0. Solution B has a pH of 5.0. Which solution is more acidic? Based on the H+ ion concentrations in the two solutions, how many times more acidic?
Answer:
solution A
Explanation:
it is because solution A has a pH of 2.0 and solution B has the pH of 5.0 and also whose number is greater than the solution A .That is why it is acidic
Write any 4 reactions of compounds or element with water.
Answer:
A common characteristic of most Alkali Metals is their ability to displace H2(g) from water. This is represented by their large, negative electrode potentials. In this event, the Group 1 metal is oxidized to its metal ion and water is reduced to form hydrogen gas and hydroxide ions. The general reaction of an alkali metal (M) with H2O (l) is given in the following equation:2M(s)+2H2O(l)⟶2M+(aq)+2OH−(aq)+H2(g)(1)
Explanation:
a scale uses the principle of. to measure how much something weighs
Answer:
mass
Explanation:
mass is weight mass is weight mass is weight
You place new batteries in your flashlight. After taking off, you find it does not work anymore. What might have gone wrong?
If kb for nx3 is 2.5×10−6, what is the poh of a 0.175 m aqueous solution of nx3? express your answer numerically
Answer:
pOH = 3.18
Explanation:
The equilibrium of a weak base as NX3 is:
NX3(aq) + H2O(l) ⇄ HNX3⁺(aq) + OH-(aq)
Where the equilibrium constant, Kb, is:
Kb = 2.5x10⁻⁶ = [HNX3⁺] [OH-] / [NX3]
As both HNX3⁺ and OH- ions comes from the same equilibrium, their concentrations are the same, that is:
[HNX3⁺] = X
[OH-] = X
And: [NX3] = 0.175M:
2.5x10⁻⁶ = [X] [X] / [0.175M]
4.375x10⁻⁷ = X²
X = 6.61x10⁻⁴M = [OH-]
As pOH = -log [OH-]
pOH = 3.18Which of the following contains the most atoms?
2 moles of silver.
1 mole of carbon.
2.5 moles of oxygen.
1.5 moles of iron.
PLZZZZZ BE FAST!
Answer:
1 mole of carbon.
Explanation:
If 3 moles of Mg were reacted, how many moles of
0, were also reacted?
2 Mg + O2 → 2 Mgo
please help me with this question !
Answer: i dont understand
Explanation:
Question
What is the name of this ben zene ?
the name of this benzene is benzene circle
if you also don't understand the go in this link
https://en.m.wikipedia.org/wiki/File:Benzene_circle.svg
plz give me brainliest+ thanks i need it to reach in expert : )
How many molecules of Na2O are in 24.6g? Show work!
Answer:
Explanation:
Na2O has 2 atoms of Sodium and 1 atom of Oxygen
So, the molecular mass of Na2O is:
(2 x Atomic weight of Na) + (1 x Atomic weight of O)
Atomic weight of Na = 22.99 g
Atomic weight of O = 16 g
Therefore, Molecular Mass of Na2O = (2x 22.99g) + (1 x 16g)
= (45.98 + 16)g = 61.98 g
Therefore 61.98 g of Na2O contains 6 x 10^23 molecules (Avogadro's number).
24.6 g of Na2O therefore contains:
(24.6/61.98) x 6 x 10^23 = Answer!
The word “covalent” can be broken into two parts: “co” and “valent.” The “co” part means
“together.” To what does the “valent” part refer?
A. Outer electrons
B. Atoms
C. Protons
D. Nuclei
E. Inner electrons
Answer:
Outer electrons.
Explanation:
All bonds are localized bonds formed between two atoms by the donation of electrons from each atom.
hola estoy aburrido alguien para hablar
Answer:
yoooo si se puede jejeje
Explanation:
Answer:
Explanation:
hola como esta yo tan biene es aburrido
A substance originally has a volume of 4.7 L at 300. K. It is then transferred
into a container with a volume of 3.0 L. What is the new temp for the new
volume?
450 K
350 K
190 K
250 K
An unknown gas shows a density of 3 g per litre at
273°C and 1140 mm Hg pressure. What is the gram
molecular mass of this gas ?
Answer:
Mass of 1 litre of this gas at 273 degree Celsius and 1140 mm Hg pressure is
3 grams. So, (T1) = (273 + 273) degree Absolute = 546 degree Absolute and
(P1) = (760 + 1140) mm Hg = 1900 mm Hg and (V1) = 1 Litre
First, we have to find out how much volume does it occupy at NTP; (T2) = 273 degree Absolute and (P2) = 760 mm Hg.
So, (V2) = (1900*1 / 546)*(273 / 760) = 1.25 litre.
So, the mass of 1.25 litre volume of this gas = 3 grams
Therefore, the mass of 22.4 litre volume of this gas = (3*22.4 / 1.25) grams
= 53.76 grams.
So, the gram molecular mass of the gas is 53.76.
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What are the two halves of the brain
Answer: left and right hemisphere ya
Explanation:
Which of the following statements describes electromagnetism?
A. Magnetism and electricity both include protons and electrons.
B. Magnetism can cause electrons to flow, and electricity can make a
wire magnetic
C. Electrons are attracted to the protons in magnets.
O D. Magnetism and electricity are both used by society to do work.
Answer:
b
Explanation:
The statement that is true about electromagnetism is Magnetism can cause electrons to flow, and electricity can make a wire magnetic. The correct option is B.
What is electromagnetism?Electromagnetism is a term for the force that acts between electrically charged particles. The force that acts between charged ions and this force is exhibited in the magnetic field.
Examples of electromagnetism are radio and television waves, ultraviolet light, infrared rays, visible light, X-rays, microwaves, and gamma rays.
When the force is created, the current move through the wire or conductor, by moving, a magnetic field is created on the conductor where the current is moving.
Thus, the correct option is B. Magnetism can cause electrons to flow, and electricity can make a wire magnetic.
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how do you calculate molecular weight
Answer:
Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.
Will chlorine displace bromine from a solution of potassium bromide? Explain your answer
Answer:
When chlorine water is added to potassium bromide solution, chlorine will displace the bromine from the salt solution. The chlorine will be REDUCED (gain electrons) to chlorine ions. The bromide ions will be OXIDISED (lose electrons) to become bromine. The bromine will turn the solution orange.
Explanation:
HAVE A GOOD DAY
During the heating of naphthalene, CH:
(a) Why is naphthalene, CH not heated directly using the Bunsen burner?
Answer:
naphthalene aka mothball sublimes
Which would require less energy, moving two particles of the same charge together, or moving two particles of opposite charge close together? Why? (Explain)
Answer:
Moving two particles of the opposite charge close together.
Explanation:
Think about it.
Opposites attract.
When you attempt to move particles with the same charges, a force is created.
6. Which of the following forces occurs when forces push or pull in opposite directions?
a) tension
c) torsion
b) shear
d) compression
Answer:
Shear
Explanation:
22. Which statement describes the likely metabolic impact of cyanide
production on clover plants?
M. Cyanide is nontoxic to clover plants because they produce ATP without
the electron transport in the mitochondria.
P. Cyanide is toxic to clover plants because they use cytochrome c oxidase
for electron transport in the mitochondria.
R. Cyanide is toxic to clover plants because they use cytochrome c oxidase
for ATP synthesis in the chloroplasts.
s. Cyanide is nontoxic to clover plants because they carry out electron
transport in chloroplasts rather than in mitochondria.
Answer:
M
Explanation:
Hope it helped u alot
P. Cyanide is toxic to clover plants because they use cytochrome c oxidase for electron transport in the mitochondria.
The correct option is B.
Where is cyanide found?Various bacteria, fungi, and algae have the ability to produce cyanides. Tapioca, spinach, willow shoots, almonds, string beans, fruit seeds, and car fumes are other items that contain cyanides.
What goods include cyanide?Smoking cigarettes and the byproducts of the combustion of synthetic fibers, including plastics, contain cyanide. Combustion products are chemicals that are released while combustion. The paper production, textiles, and plastics all use cyanide. The chemicals used it to develop pictures include it. Unfortunately, cyanide is not like other materials. By utilizing this approach, you simply cannot develop a natural tolerance to cyanide.
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The complete question is -
Which statement describes the likely metabolic impact of cyanide
production on clover plants?
A-M. Cyanide is nontoxic to clover plants because they produce ATP without the electron transport in the mitochondria.
B-P. Cyanide is toxic to clover plants because they use cytochrome c oxidase for electron transport in the mitochondria.
C-R. Cyanide is toxic to clover plants because they use cytochrome c oxidase for ATP synthesis in the chloroplasts.
D-S. Cyanide is nontoxic to clover plants because they carry out electron
transport in chloroplasts rather than in mitochondria.
Please help thank you
Answer:
C. The hand shears because their shorter handles transfer force more quickly to the cutting blade.
Explanation:
How many hydrogen atoms are present in an alkene with 7 carbon atoms.