Answer:
C. Carbon
Explanation:
Carbon has an electronegativity of 2.55, followed by Tin at 1.96, Silicon at 1.90 and the least electronegative would be Lead at 1.87.
Explain the effect of pressure on the following chemical equation :
[tex]CaCO_3 = CaO + CO_2[/tex]
2. Explain the effect of concentration in the following equation :
[tex]3Fe \: +4H_2O= Fe_3 \: O_4 + 4H_2[/tex]
Answer:
Explanation:
One
Pressure will favor the side with the least number of mols if it the larger number of moles counts only the gases. (Le Chetalier's Principle). In this case both CaCO3 and CaO are not soluble in water. The only gas is CO2. Since it represents the most number of mols the reactant is favored.
More or Less are very troublesome words in beginning science. Make sure you understand their meaning for this question. The more pressure applied, the more the reactants will be favored and the equation shifts left.
Two
Fe and Fe3O4 are both solids. It depends on the form that water takes. Looking it up, it is shown to be in a gas form. That means if you increase the pressure, nothing will happen. That is not your question, but you should note it.
The answer to your question is you increase the concentration of Fe or H2O, the equilibrium will shift right.
If you add more Fe3O4 or hydrogen it will shift left.
Chemists say that if you alter the equilibrium the equation will shift in the opposite direction to compensate for the action you have taken.
1. B How many grams are in 5.00 mol of CO2? CO2 molar mass is 44 g/mol. 1 point Grams = Moles X Molar Mass
Answer: 220 g
Explanation:
To find the answer to this problem, all you need to do is multiply the number of moles by the molar mass of the molecule.
In this problem, you multiply 44 (the molar mass of CO2) by 5 (the grams of CO2 given) to get 220.
Answer:
220 g
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.
Why do chemical changes happen
Answer:
Reactions occur when two or more molecules interact and the molecules change. ... Bonds between atoms are broken and created to form new molecules. That's it.
Explanation:
If 15.0 g CH3OH reacts with 10.0 g of CO, which is the limiting reagent and what is the theoretical yield of CH3COOH?
Answer:
Explanation:
CH₃OH + CO = CH₃COOH .
32 g 28 g 60 g
CH₃OH = 15 g ; CO = 10 g
32 g of CH₃OH reacts with 28 g of CO
15 g of CH₃OH reacts with 28 x 15 / 32 g of CO
= 13.125 g of CO .
CO given = 10 g , so CO is the limiting reagent .
28 g of CO reacts with CH₃OH to produce 60 g of CH₃COOH
10 g of CO reacts with CH₃OH to produce 60 x 10 / 28 g of CH₃COOH
CH₃COOH produced = 600 / 28 g = 21.42 g .
Answer: CO
Explanation:
Place the following metals in order of most reactive to least:
Aluminium
Calcium
Copper
Iron
Magnesium
Sodium
Zinc
Answer:
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron
Copper
Explanation:
how can I identify a salt compound is acidic,basic,neutral
Salts that are from strong bases and strong acids do not hydrolyze. Salts that are from strong bases and weak acids do hydrolyze, which gives it a pH greater than 7. Salts of weak bases and strong acids do hydrolyze, which gives it a pH less than 7.
What type of atmospheric pressure is associated with tornadoes,
hurricanes, and thunderstorms?
Answer:
Explanation:
The ingredients are warm ocean water, weak upper level winds, and low pressure. The warm ocean water supplies the moisture for the hurricane. The weak upper levels winds allow the developing hurricane to not tear apart, and the low pressure allows thunderstorms to develop.
How could we separate the baking soda from the after after it had already been mixed in? helppp!!!
Answer:
i thing by filtering
Explanation:
Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —> 2H2O(I)
Answer:
4 × 10 g
Explanation:
Step 1: Write the balanced equation
2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)
Step 2: Calculate the moles corresponding to 4 g of H₂
The molar mass of H₂ is 2.02 g/mol.
4 g × 1 mol/2.02 g = 2 mol
Step 3: Calculate the moles of H₂O produced from 2 moles of H₂
The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.
Step 4: Calculate the mass corresponding to 2 moles of H₂O
The molar mass of H₂O is 18.02 g/mol.
2 mol × 18.02 g/mol = 4 × 10 g
a_Zn(s) + _b_AgNOs(ag) -> c Zn(NO3)(20) + d Ag(s)
What tuberculosis means "
Answer:
it is a infectiousr bacterial disease characterized by the growth of nodules(tubercles) in tissues especially the lungs
length = 10cm
width = 5cm
mass = 300g
height = 2cm
volume =?
density =? Pls help
Answer:
volume=100
density=100
Explanation:
to get volume you multiply length and width to get area then multiply height=100
to get density you divide mass by volume
Which are characteristics of scientific questions? Check all that apply.
asking about subjective matters
having a wide focus on many topics
addressing a gap in knowledge
possibly leading to a testable hypothesis
already having fully confirmed explanationsWhy aren't descriptive investigations repeatable?
Answer:
asking about subjective matters
possibly leading to a testable hypothesis
addressing a gap in knowledge
I got soo confused about that last part. I didn't know if that was an option or something you needed to be answered.
Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships.
Answer:
its N.N.November people
Explanation:
What type of atom is formed by the loss of one or more electrons?
An atom that loses one or more valence electrons to become a positively charged ion is known as a cation, while an atom that gains electrons and becomes negatively charged is known as an anion.
A scientist dissolves 10 g of NaOH into 0.275 L of water. What is the
molarity of the solution?*
0.3636 M
0.9091 M
O 0.2750 M
0.8956 M
Please help I’m being timed
PLEASE HELP I WILL MARK AS BRAINLESS 12+ POINTS!!
Which of the following reasons BEST explains why thunderstorms are likely to form on a hot day?
A warm, humid air rises quickly and then condenses into rain clouds.
B) as air rises, it loses temperature and causes rain.
C the air is usually calm and allows the clouds to form
D the air drops quickly and forms low level cloud layers.
Answer:
A
Explanation:
The high humidity, in conjunction with warm temperatures, creates massive amounts of warm, moist air rising into the atmosphere, where it can easily form a thunderstorm. As the process of evaporation and condensation occurs, these droplets collide with other moisture that is condensing as it rises.
Which of the following equations properly expresses the relationship among R, S, and D as observed in the field experiments?
Answer:
c
Explanation:
Why do atoms bond?
a. Noble Gas Configuration b. Halogen Configuration c. Magnetic Configuration
Answer:
es la letra a)
Explanation:
síganme en insta
The pictures below show samples of different substances.
The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?
A. No, because they have different masses.
B. No, because they have different volumes.
C. Yes, if each sample contains 6.02 x 10^23 atoms.
D. Yes, if each sample contains 2 amu.
Answer:
C. Yes, if each sample contains 6.02 x 10²³ atoms.
Explanation:
It is possible for each sample to contain 1 mole of each sample if and only if each of the sample if made up of 6.02 x 10²³ atoms.
6.02 x 10²³ atoms is the Avogadro's number. This number is equivalent to a mole of a substance.
If the amount of matter in the given substance is at least one mole, it is possible that they are made up of one mole each of each substance. If they contain lesser amount of atoms, then it is not up to one mole of substance. But if it is greater, then, we can have even more than one mole of substance.A mole is simply a unit of measurement and it is equivalent to 6.02 x 10²³ atoms.
Answer:
C
Explanation:
i just took the test
:)
How much heat is necessary to change 10.0g of water from 20 degrees celsius to 75 degrees celsius
Answer:
6
Explanation:
Identify the properties of a covalent substance (multiple answers )
A) high melting point
B) low melting point
C) soluble in water
D) soluble in alcohol
E) conducts electricity in water
does not conduct electricity in water
A) high melting point
C) soluble in water
D) soluble in alcohol
E) does not conduct electricity in water
these options are a bit vague as some covalent substances dissolve in water / alcohol while some don't
6) Determine la concentración de una solución que ha sido preparada añadiendo 80cc de agua a 320cc de solución alcohólica al 20% v/v. Valor: 3 puntos
Answer:
16% v/v es la nueva concentración de alcohol en la solución
Explanation:
El porcentaje volumen/volumen (% v/v) es definido como 100 veces la relación entre el volumen de soluto (Alcohol en este caso) y el volumen total de la solución (Agua + Alcohol). Para resolver esta pregunta necesitamos hallar el volumen de alcohol y el de agua:
Volumen alcohol:
320cc * (20cc etanol / 100cc) = 64cc etanol
Volumen agua:
80cc + (320cc-64cc) = 336cc agua
% v/v:
64cc / (336cc + 64cc) * 100
= 16% v/v es la nueva concentración de alcohol en la solución
Hi! It would be awesome if you could answer this soon. 20 points!
Answer:
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
Explanation:
The problem here involves balancing the chemical reaction given and also classifying the reaction.
The unbalanced expression is given as:
HgO → Hg + O₂
Assign the alphabets a,b and c as coefficients that will balance the equation
aHgO → bHg + cO₂
Conserving Hg: a = b
O: a = 2c
So, let c = 1, a = 2 b = 2
Therefore;
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
The weight of an object is different on each planet because _____.
1.each planet is a different distance from the sun
2.each planet has a different force of gravity
3.mass of the object changes on each planet
4.mass changes with location
A ball is kicked straight up. The ball's speed decreases as it moves upward. Why does the ball's
speed decrease?
A ) Because a force given to the ball by the kick becomes equal to the force of gravity
O Because one or more forces are acting to slow the ball down
O Because a force given to the ball by the kick completely runs out
O Because a force given to the ball by the kick becomes less than the force of gravity
Answer:
I think the third one
A ball kicked straight up slows down as it moves upward because the force given to the ball by the kick completely runs out. Thus, the correct option is C.
What is Gravitational force?Gravitational force of the planet earth acts on every object which has some mass. When an object is thrown upwards the gravitational force of the earth acts against the velocity of the object such as ball and pulls the object downwards, i.e., towards itself on the ground. Thus, the object returns back towards the surface of earth.
The direction of a ball's motion while thrown upward is changing as it rises into the air when thrown. The speed of the ball decreases because the force of gravity pulls it towards the ground and makes the distance it covers decrease.
Therefore, the correct option is C.
Learn more about Force here:
https://brainly.com/question/13191643
#SPJ2
Helpppppppppppppppppppppppp
Answer:
I think its A or D
Explanation:
PET is an acronym for what condensation polymer
help asap it needed
Answer:
polyethylene terephthalate
PET (also abbreviated PETE) is short for polyethylene terephthalate, the chemical name for polyester. PET is a clear, strong, and lightweight plastic that is widely used for packaging foods and beverages, especially convenience-sized soft drinks, juices, and water.
Explanation:
hope this helps have a good rest of your afternoon :) ❤
hello, please can you solve my question:
an atom contains 22 protons and 26 neutrons. What is it's mass number?
I will mark brainliest
A chemical reaction yields 1 mole of lithium hydroxide (LiOH). How many grams of
lithium hydroxide are present?
3 g
48 g
728
24 g
Mass of LiOH= 23.95 grams ≈ 24 g
Further explanationGiven
1 mole of lithium hydroxide (LiOH)
Required
Mass of LiOH
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
n = mass : molar mass
Input the value :
mass = n x molar mass
mass = 1 mole x 23,95 g/mol
mass = 23.95 grams ≈ 24 g
The mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
The mass of a compound present in a mole of sample has been equivalent to the molar mass of the compound. The molar mass of the compound has been the sum of the constituent in a formula unit.
The molar mass of lithium hydroxide (mwt) has been given as:
[tex]mwt=m_L_i\;+\;m_O\;+\;m_H[/tex]
Where, the mass of Li is [tex]m_L_i=6.941\;\rm g[/tex]
The mass of oxygen is [tex]m_O=16\;\rm g[/tex]
The mass of hydrogen is [tex]m_H=1\;\rm g[/tex]
Substituting the values for molar mass (mwt) of LiOH:
[tex]mwt=6.941\;+\;16\;+\;1\;\text g\\mwt=23.941\;\text g\\mwt=24\;\text g[/tex]
The molar mass of LiOH has been 24 g.
The molar mass has been equivalent to the mass of 1 mole of sample. Thus, the mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
For more information about mass of mole, refer to the link:
https://brainly.com/question/1370888
All organisms need glucose or a source of________ to carry out basic life functions
Answer:
chlorophyll
Explanation: