Answer: Therefore, to melt 2kg of ice 835. 48kJ of heat is required.
Explanation:
I hope this helps!
Which of the following will conduct electricity?
Question 9 options:
A) Acid solutions only
B) Base solutions only
C) Acid solutions and base solutions
D) Neither acid solutions nor base solutions
Answer:
I think is c
Explanation:
I hope this helps you
Answer:
Acid solutions and base solutions
Explanation:
The chemical equation below shows the burning of magnesium (Mg) with oxygen (O2) to form magnesium oxide
(Mgo)
2Mg + O2 → 2Mgo
The molar mass of Oz is 32.0 g/mol. What mass, in grams, of Oz is required to react completely with 4.00 mol of Mg?
2.00
64.0
128
256
Answer:
64
Explanation:
B
what determines the identity of a substance?
proton
neutron
electron
photon
Answer:Typically, the identity of a substance can be described by a: chemical name, for example, benzene; number, for example, EC number 200-753-7, and.
Explanation:chemical composition, for example, >99 % benzene and <1 % toluene. The composition is determined by chemical analysis.
Answer:
proton
Explanation:
thats what my bio teacher just said
NO FILES PLZ HELP
When a solid produced by a chemical reaction separates from the solution it is called...
a precipitate.
a molecule.
b. a reactant.
d. the mass of the product.
Answer:
a. Precipitate
Explanation:
solids can precipitate out of the solution and be left over after the reaction. reactants are incorrect because they are reacted to cause the reaction. b and d are also irrelevant terms.
How would the intensity of light from the bulb change if you were to: a) Dissolve some additional CuSO4(s) in the CuSO4 solution?
Answer:
The intensity of the light bulb increases
Explanation:
The conductivity of a solution depends on the concentration of ions in solution. This implies that, if the concentration of ions in solution is increased, the conductivity of the solution increases accordingly.
If we add more CuSO4(s) to the CuSO4 solution, the concentration of ions in the solution and consequently the conductivity of the solution increases.
Therefore, the intensity of the light bulb increases.
5F248+ 2NH3(8) ► NF418 + 6HF
a) If you start with 3.6 g of NH, and excess F2, how many liters of HF at STP can you make?
Answer:
14.2L at STP
Explanation:
Based on the problem, 2 moles of NH3 produce 6 moles of HF. To solve this question we have to convert the mass of NH3 to moles. With the chemical equation find the moles of HF and using PV = nRT find the liters of HF:
Moles NH3 -Molar mass: 17.031g/mol-
3.6g NH3 * (1mol / 17.031g) = 0.211 moles NH3
Moles HF:
0.211 moles NH3 * (6mol HF / 2mol NH3) = 0.634 moles HF
Volume HF
PV = nRT; V = nRT/P
Where V is volume in liters, n are moles of the gas = 0.634 moles, R is gas constant = 0.082atmL/molK, T is absolute temperature = 273.15K at STP and P is pressure = 1atm at STP.
Replacing:
V = 0.634moles*0.082atmL/molK*273.15K / 1atm
V = 14.2L at STP
how do you start a hypothesis in science which includes scientific words and information which is on how much sugar can dissolve in water using the temperature of the solvent which is the water?
Answer: If ... Then... Because...
Explanation: if I water this plant twice a day then it will grow 3 feet because the more water it gets the bigger it grows
Which of the following questions would assist a student to differentiate between Earth’s major biomes?
A. Does the biome receive high levels of precipitation?
B. Does the biome consist of more plants than animals?
C. Does the biome consist of biotic and abiotic factors?
D. Does the biome consist of organisms with adaptations for survival in the biome?
Answer:
a
Explanation:
does the blome receive high levels of precipitation
Answer:
A.Does the biome receive high levels of precipitation?
Explanation:
1. If CO2 is being produced in the solution at a faster rate than H2CO3, is the rate of the forward or reverse reaction faster?
Answer:
I believe that it would be faster but the reaction would not happen immediately. It would take a long time for the effect to start kicking in but it will definitely speed up the process of CO2 being released into our atmosphere.
Explanation:
If CO₂ is being produced in the solution at a faster rate than H₂CO₃, then the rate of the forward reaction is faster.
What is the rate of a reaction?Rate of any reaction tells about the duration of the completion of reaction to produce products.
Given chemical reaction is written as:
H₂CO₃ ⇄ CO₂ + H₂O
In the question it is given that CO₂ is produced at the faster rate, and it is the product of the forward reaction. So, we conclude that rate of forward reaction is faster.
Hence, the rate of forward reaction is faster.
To know more about rate of a reaction, visit the below link:
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When H forms a bond with H2O to form the hydronium ion H3O , this bond is called a coordinate covalent bond because
Answer:
both bonding electrons come from the oxygen atom
Explanation:
A coordinate covalent bond is said to be formed when an electron pair is donated into a empty orbital of an atom from a filled orbital of another atom.
In this type of covalent bond, the shared electron pair is furnished by only one of the bonding species.
The bonding between H^+ and H2O to form H3O^+ involves donation of a lone pair of electrons on oxygen into the empty 1s orbital of H^+ hence the two bonding electrons come from oxygen. This is why the bond is called a coordinate covalent bond.
Suggest whether potassium metal can be used to react with an acid to prepare a soluble salt. Explain your answer.
Yes, potassium metal can be used to react with an acid to prepare a soluble salt.
Acids react with metals to yield the corresponding metal salt and hydrogen gas.
One of the properties of metals is their ability to react with dilute acids to yield a soluble salt and hydrogen gas. This is a common reaction for all metals that are above hydrogen in the activity series.
Potassium can react with a hypothetical acid HB as follows;
2K(s) + 2HB(aq) ------> 2KB(aq) + H2(g)
https://brainly.com/question/6136372
3. A PS6 plugged into a 120 V outlet uses 3 Amps. What is the Resistance rating of
the power cord?
voltage: V=
current: 1 =
resistance: R=
V=IxR
1=VR R
Underline/Bold Which Equation we are going to use:
= V
Plug in the numbers from above and solve for our answer:
Answer:
R = 40 ohms
Explanation:
Given that,
The voltage of outlet, V = 120 V
Current flowing through the device, I = 3 A
We need to find the Resistance rating of the power cord. Let the resistance is R. We know that,
Ohm's law, V = IR
Put all the values,
[tex]R=\dfrac{V}{I}\\\\R=\dfrac{120}{3}\\\\R=40\ \Omega[/tex]
So, the resistance rating of the power cord is equal to 40 ohms.
Part B
DIRECTIONS: Identify the type of heat transfer depicted in each picture by arranging the
jumbled letters and answer the questions that follows.
Answer:
1. conduction
2. Convection
3. Radiation
London dispersion forces decrease with increasing number of electrons decreasing number of electrons
Answer:
Increasing number of electrons
Explanation:
London dispersion forces are intermolecular forces that occur due to momentary shifts in the electron cloud of atoms or molecules.
London dispersion forces are most commonly observed as the predominant kind of intermolecular forces in non-polar substances.
Generally, it is observed that the strength of these London dispersion forces tends to increase as the number of electrons in the substance increases.
what are the best topics to write a project work on EVS and Chemistry
Answer:
It is better to do chemistry
Explanation:
So that you will learn more of chemicals
How many grams of CO2 are produced from 6.7 L of O2 gas at STP?
13 g CO₂
General Formulas and Concepts:Chemistry
Atomic Structure
Reading a Periodic TableMolesSTP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KStoichiometry
Using Dimensional AnalysisMath
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:Step 1: Define
Identify variables
[Given] 6.7 L O₂
[Solve] g O₂
Step 2: Identify Conversions
[STP] 22.4 L = 1 mol
[PT] Molar Mass of O: 16.00 g/mol
[PT] Molar Mass of C: 12.01 g/mol
Molar Mass of CO₂: 12.01 + 2(16.00) = 44.01 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 6.7 \ L \ O_2(\frac{1 \ mol \ O_2}{22.4 \ L \ O_2})(\frac{44.01 \ g \ O_2}{1 \ mol \ O_2})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 13.1637 \ g \ O_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
13.1637 g CO₂ ≈ 13 g CO₂
calculate the ph of a solution having [OH-] = 8.2 x 10 ^-8M
Answer:
6.91Explanation:
To find the pH we must first find the pOH
The pOH can be found by using the formula
pOH = - log [ {OH}^{-} ]
We have
[tex]pOH = - log(8.2 \times {10}^{ - 8} ) \\ = 7.086186...[/tex]
pOH = 7.09
Next we use the equation
pH = 14 - pOH
We have
pH = 14 - 7.09
We have the final answer as
6.91Hope this helps you
BONUS QUESTION - It takes 194 mL of a 0.5 M NaOH solution to neutralize 300
mL of an HCl solution. What is the concentration of the HCl solution? (3 pts)
NaOH + HCL » NaCl + H,O
Answer:
1.7 mol/dm3
Explanation:
working out in the image
What types of reactions take place in hot packs and cold packs? What evidence shows that
both hot packs and cold packs experience chemical reactions? Drag and drop the text into
the correct boxes.
Answer:
reaction to cold pack: change in temperature
Evidence of a chemical reaction etc is change in composition
Explanation: composition is atoms changeing and etc, which is a chemical reacton i think. Change in temperture is alsoa chemical reaction but cold packs
Answer:
Cold pack: absorbs heat (endothermic reaction)
Hot pack: releases heat ( exothermic reaction)
Explanation:
when a cold pack/hot pack is shaken, water mixes with the chemicals in the outer layer and reacts to release or absorb heat.
how could you get the crystals in a supersaturated solution back into the solution?
Question 6
6.7 pts
A solution has a very high electrical conductivity, turns litmus paper red and has a pH of 2.0. This is most likely
a(n)
Base/Strong Electrolyte
Acid/Weak Electrolyte
Acid/Strong Electrolyte
Base/Weak Electrolyte
Next
« Previous
Answer:
Acid/String Electrolyte
Explanation:
Litmus paper turning red means it is an acidic solution. A pH of more than 7 is Base while pH of less than 7 is an acid. Since the pH is 2, less than 7, it s is an acid. Since it has a high electrical conductivity, it must be a strong Electrolyte.
match these items. three-dimensional bonding, hardest natural substance, used as lubricant, nonconductor, weak planar bonds, carbon black or soot
Answer:
1. three-dimensional bonding
Diamond
2. Hardest natural substance
diamond
3. Used as lubricant
Graphite
4. nonconductor
Diamond
5. Weak, planar bonds
Graphite
6.Carbon black or soot
Amorphous
Explanation;
sorry im late, hopefully this can help somebody :)
Increasing the surface area between solute and solvent Select one: a. has no effect on the rate of dissolution. b. decreases the rate of dissolution. c. can increase, decrease, or have no effect on the rate of dissolution. d. increases the rate of dissolution.
Increasing the surface area between solute and solvent, increases the rate of dissolution.
What is rate?Rate of any process will gives idea about the speed of the completion of that happening process.
Dissolution is a process in which solute particles gets dissolve in the solvent medium. If we increases the surface area of any one medium of the solution like solute or solvent then the rate of dissolution increases, as it increases the space to get attracted to each other.
Hence, option (d) is correct.
To know more about dissolution, visit the below link:
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What kind of reaction shows two reactants combining to form one new product?
What kind of reaction shows two reactants combining to form one new product?
A) a single-replacement reaction
B) a double-replacement reaction
C) a decomposition reaction
D) a synthesis reaction
What is the SUM of the coefficients for the balanced chemical equation below?
PLEASEEEE
2CO +02 2CO2 what is the mole ratio of carbon monoxide to carbon
dioxide
A 1.2
B 2.2
C 2:1
D 3:1
Answer:
B 2:2
Explanation:
Mole ratio is the comparison of the ratio of two compounds or elements in a chemical reaction. In a balanced equation, the moles of a particular compound or element is written as a coefficient. This means that mole ratio is the ratio of the coefficient of two substances in a reaction.
In this balanced chemical equation given as follows:
2CO + 02 → 2CO2
The number of moles/coefficient of carbon monoxide (CO) is 2 while that of carbon dioxide (CO2) is 2.
Hence, the mole ratio of CO to CO2 is 2:2
pls help me guys please please only 1 question choose
Answer:
D.4 types of molecules is yr ans.
stay safe healthy and happy.
How do some insects take advantage of the surface tension of water?
Which organism in a food web would be best described as a recycler?
O A.
Cottontail rabbit
B.
Termite
C.
Fungi and bacteria
D.
Red fox
C,
takes dead things, makes them into other things
A sodium nitrate solution was prepared in the lab to have a concentration of 0.467 M. If 50. mL of a 6.00 M stock solution was used to prepare this sodium nitrate solution, what volume of water was added to the original 50. mL of stock solution? Provide the appropriate units (mL or L) to your response.
the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .
Explanation: