Please help thank you
Answer:
C. The hand shears because their shorter handles transfer force more quickly to the cutting blade.
Explanation:
Which 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:
Balance and indicate what type of reaction
C6H12 + O2 → CO2 + H2O
Balanced equation is [tex]C_6H_{12}[/tex] + [tex]9O_2[/tex] → [tex]6CO_2[/tex] + [tex]6H_2O[/tex].
What is the balanced equation?A balanced chemical equation occurs when the number of the atoms involved on the reactants side is equal to the number of atoms on the products side.
Balanced equation is [tex]C_6H_{12}[/tex] + [tex]9O_2[/tex] → [tex]6CO_2[/tex] + [tex]6H_2O[/tex]. Where there are 6 carbon atoms, 18 oxygen atoms, and 12 hydrogen atoms.
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What are one advantage and one disadvantage of sexual reproduction?
What is one advantage and one disadvantage of asexual reproduction?
Answer:asexual- Energy is not required to find a mate. Offspring are genetic clones. A negative mutation can make asexually produced organisms susceptible to disease and can destroy large numbers of offspring. Some methods of asexual reproduction produce offspring that are close together and compete for food and space.
Explanation:During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents.
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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Which description applies to all atoms of an element? flammable visible under a microscope different alike
Answer:
I think its alike.... Pretty sure actually
hola estoy aburrido alguien para hablar
Answer:
yoooo si se puede jejeje
Explanation:
Answer:
Explanation:
hola como esta yo tan biene es aburrido
You place new batteries in your flashlight. After taking off, you find it does not work anymore. What might have gone wrong?
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.
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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What is the concentration of a solution made by dissolving 0.99mol of acetic acid in enough water to make 0.58L of solution?
Answer:
[CH₃COOH] = 1.70 M
Explanation:
When we talk about concentration we can determine Molarity
Molarity determines the moles of solute that are contained in 1L of solution.
In this case our solute is the acetic acid.
M = mol/L
M = 0.99 mol /0.58L → 1.70 M
We can also make a rule of three
In 0.58 L of solution we have 0.99 moles of solute
In 1 L of solution we may have (1 . 0.99) / 0.58 = 1.70 moles
Acetic acid is a weak acid, partially dissociated in water.
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺ Ka
What are the two halves of the brain
Answer: left and right hemisphere ya
Explanation:
PLEASE ANSWER CORRECTLY AND ONLY IF U KNOW! IS IT A B C OR D?!
Answer:
A
Explanation:
There are three states of mater; solid liquid and gas. The sold state is the difficult to compress while the gaseous state is quite easy to compress.
A gas is easily compressed because the particles in a gas are far apart from each other. A solid is difficult to compress because the particles of a solid are close together. From all the above statements, it is easily deducible that the compressibility property of a substance in a particular state of matter depends on the proximity of the particles to each other, hence the answer above.
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
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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How many grams are in 5.4 moles of K2SO4
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles K2SO4, or 174.2592 grams.
Explanation:
The potassium sulphate( [tex]K_{2} SO_{4}[/tex] )contain 940.95 gram in 5.4 moles.
What is mole?A mole is described as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the substance's elementary constituents.
Given data:
Mole = 5.4
Molar mass = 174.25 g/mol
Mass = ?
Mole can be calculated by using the formula:
Mole = mass / molar mass
Put the value of given data in above equation.
Mass = Mole × molar mass
Mass = 5.4 mole × 174.25 g/mol
Mass = 940.95 gram
Therefore, there are 940.95 gram in [tex]K_{2} SO_{4}[/tex]
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HELP!!!!!What is the molar mass of a gas which has a density of .249 g/L at 20.0 degrees Celsius and a pressure of .95 atm?
Answer:
6.31g/mol
Explanation:
Using the ideal gas equation;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
Mole (n) = mass (m)/molar mass (Mm)
* Mm = m/n
Also, density (p) = mass (m) ÷ volume (V)
PV = nRT
Since n = M/Mm
PV = M/Mm. RT
PV × Mm = m × RT
Divide both sides by V
P × Mm = m/V × RT
Since p = m/V
P × Mm = p × RT
Mm = p × RT/P
Mm = 0.249 × 0.0821 × 293/0.95
Mm = 5.989 ÷ 0.95
Mm = 6.31g/mol
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:
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 = 3.18The tapir and agouti are ___________ found in the Amazon Rainforest.
A.Carnivores
B.Omnivores
C. Herbivores
D. Decomposers
"science"
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.
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
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6. This means that the relationship between amplitude and wavelength is
a. direct
b. inverse
C. not related
Answer:
Explanation:
a. direct
Amplitude and wavelength are the property of the waves. These both are directly related to each other. Thus, option A is correct.
What are wavelength and amplitude?Amplitude is the measure of the wavelength that is estimated from the peak or crest to the trough of the wave. Wavelength is the measurement of the length of the wave from one peak to the crest of another wave.
Though there is no relationship between the wavelength and amplitude of the waves they can be said to have direct relation as wavelength and frequency are indirectly related.
Therefore, option A. direct relation is correct.
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If 3 moles of Mg were reacted, how many moles of
0, were also reacted?
2 Mg + O2 → 2 Mgo
How many hydrogen atoms are present in an alkene with 7 carbon atoms.
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
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!
See picture
Answer:
See Explanation
Explanation:
The equation of the reaction;
KHSO4(aq) + KOH(aq) -------> K2SO4(aq) + H2O(l)
Number of moles of KHSO4 = 49.6 g/136.169 g/mol = 0.36 moles
Since the reaction is in a mole ratio of 1:1, 0.36 moles of K2SO4 is produced.
Number of moles of KOH = 25.3 g/56.1056 g/mol = 0.45 moles
Since the reaction is 1:1, 0.45 moles of K2SO4 is produced
Hence K2SO4 is the limiting reactant.
Mass of K2SO4 formed = 0.36 moles of K2SO4 * 174.26 g/mol = 62.7 g
So;
1 mole of KHSO4 reacts with 1 mole of KOH
0.36 moles of KHSO4 reacts with 0.36 * 1/1 = 0.36 moles of KOH
Amount of excess KOH = 0.45 moles - 0.36 moles = 0.09 moles
Mass of excess KOH = 0.09 moles * 56.1056 g/mol = 5 g of excess KOH
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!!!
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.