Answer:like my photo bc i like it
Explanation:
omg i look .........................................
what must happen for heat to be transferred by thermal conduction?
The transfer of heat between substances by thermal conduction is only possible when they are in direct contact with each other.
What is Thermal Conduction ?The transfer of heat from the hotter end to the colder end of object is known as conduction.
The spontaneous flow of Heat from a hotter to a colder body ie, heat is conducted from the hotplate of an electric stove to the saucepan when it is in contact with it.
The better the conductor, the more rapidly heat will be transferred.
Thus, The transfer of heat between substances by thermal conduction is only possible when they are in direct contact with each other.
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1 point
If the element Lithium (Li) were to bond with the element Sulfur (s), what
type of bond can you predict will be formed and why?*
A. Covalent-Li and S are two nonmetals
B. Covalent-Li is a metal and S is a nonmetal
C. Ionic-Li and S are two nonmetals
D. Ionic-Li is a metal and S is a nonmetal
Answer:
C. Ionic-Li and S are two nonmetals
2. What is the molarity of a CuBr2 solution that contains 446 g of solute in 5000 mL of solution?
Answer:
0.4 M
Explanation:
M=moles/Liters
Convert grams to moles (446/223.37=1.99668711)
Convert 5000 mL to liters (5000/1000)
Plug in the values and solve
M=2/5
M=0.4
please help i need to do good in this class
Answer:
Explanation:
di) number of protons is 12 for all, number of neutrons is 13 for mg- 25 and 14 for mg-26
plzzzzzzzzzz help ASAP
Answer:
i think the answer is c because it says that is all they care
What must be done to calculate the enthalpy of reaction? Check all that apply. The first equation must be halved. The first equation must be reversed. The second equation must be halved. The second equation must be reversed. The third equation must be halved. The third equation must be reversed. What is the overall enthalpy of reaction? Delta.Hrxn = kJ
The overall enthalpy of the reaction has been obtained by reversing the second equation, and third equation must be halved. Thus, option D and E has been correct.
The complete reactions given in the question has been:
[tex]\rm C\;+\;O_2\;\rightarrow\;CO_2\\2\;CO\;+\;O_2\;\rightarrow\;2\;CO_2\\2\;H_2O\rightarrow\;2\;H_2\;+\;O_2[/tex]
The overall reaction has been:
[tex]\rm C\;+\;H_2O\;\rightarrow\;CO\;+\;H_2[/tex]
To obtain the overall enthalpy of the reaction, the intermediate reaction enthalpy has been arranged to give the overall equation.
The first equation has been in the correct sequence for the final reaction.
The second equation has been in in the same order to obtain the overall reaction. The CO has been the product, while carbon dioxide has been the reactant from equation 1. Thus, equation 2 has been reversed.
The third equation has 2 moles of water while the overall reaction has 1 mole of water. Thus, equation third has been halved.
Thus, to obtain the enthalpy of overall final reaction, the second equation must be reversed, and third equation must be halved. Thus, option D and E has been correct.
For more information about the enthalpy of reaction, refer to the link:
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What must be done to calculate the enthalpy of reaction? Check all that apply.
The first equation must be halved.
The first equation must be reversed.
The second equation must be halved.
✔️ The second equation must be reversed.✔️ The third equation must be halved. ✔️ The third equation must be reversed.What is the overall enthalpy of reaction?
ΔH[tex]rxn[/tex]= ✔️131.3 kJ
help, please...I have no idea what I'm doing :D
Answer:
Hey!
Multiply the % × amu
27.88×(.922)= 25.71 lmk if you need help with the rest!why is there no reaction between copper and sodium chloride
remember I am talking of copper alone and not copper sulfate.
Answer:
If the solution is not in contact with air, nothing will happen. If the solution is in contact with air, it will be not a reaction between copper, water and sodium chloride..
in the end there will be no reaction
Why do scientific experiments need to be repeated?
A. Because scientists often make mistakes
B. To ensure that the same results are achieved every time
C. They only need to be repeated if the results are questionable
D. To discourage other scientists from trying to get the same results
Answer:
B
Explanation:
this is called peer review and your results will be stronger
Dominant genes are represented with lowercase letters while recessive genes are represented with capital letters.
1. True
2.False
Answer:
True
Explanation:
Arrange the following lons in order
of increasing size
giving reasons
Na+, Mg2+, AL3+ (4Na,12Mg,13Al)
Answer:
na+then mg2+ then al3+
Explanation:
this is due to the distance between their nucleus and valence electron
is chex mix an example of a element or compound?
Answer:
Chex mix is not an example of a element or compound.
Chex mix is an example of a mixture
l hope it helps
Look at the diagram below.
(+
When this atom becomes an ion, it will
(gain, lose)
electrons. The charge of this ion will be
Answer:
gain electrons
charge will be 4-
How many orbitals does the s subshell contain?
1
3
5
7
The correct answer to the question is that the s orbital contains only one subshell.
An orbital is a region in space where there is a high probability of finding an electron. The idea of orbital is an offshoot of the wave mechanical model of the atom.
The s orbital is spherically symmetrical. It contains only one subshell. Therefore, the correct answer to the question is that the s orbital contains only one subshell.
Learn more about orbital: https://brainly.com/question/18914648
Answer:
one orbital
Explanation:
Thus the s subshell has only one orbital, the p subshell has three orbitals, and so on
Na * 6.02 * 10^23 pls help an it got to include na
Answer:
6.02E23Na
Explanation:
you just convert the element to a decimal form
PLEASE HELP WILL MARK BRAINLY
1. If a cube has 2cm sides and a mass of 10 g, what would it's density be?
A. 0.8 g/cm3
B. 1.25 kg
C. 1.25g/cm3
D. None of the above
2.If a cube has sides of 1.5 cm, and a mass of 15 g, would it float or sink in water?
A. float
B. Sink
3. A material with a melting point of 25C would be a solid at 15C?
A. True
B. False
4. A material with a Chemical Symbol of CO is an element.
A. True
B. False
Answer:magine 2 cubes. ... One cube is made out of gold and has a mass of 19.3 grams. ... Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3 ... If you weigh 1.00 mL of liquid water it will have a mass of about 1 g so its ... They are both less dense than water so they will also float on top of water .
Explanation:
HELP ME.
Convert 2.5 grams of water into molecules of water.
Answer:
1.5×1024 molecules
Good luck!
The speed of chemical weathering depends on:
water freezing
amount of wind
soil depth
Answer:
Its soil depth
Explanation:
How many TOTAL atoms make up the molecule 3K2SO4?
Which of the following do/does not change with the change in temperature?
i. Mole fraction.
ii. Molality.
Select one:
a. only i
b. Only ii
c. Both i & ii
d. Neither of them
(I did D and it was incorrect)
Answer:
c. Both i & ii
Explanation:
Moles do not change with temperature hence Mole fraction does not depends of temperature.
Molality is number of moles of solutes per kilogram of solvent. It has no relationship with temperature.
This means both of them do not change wit the change in temperature.
Correct option;
c. Both i & ii
Pb(NO3)2+K2CrO4 →PbrCrO4 +2KNO3 classify the chemical reaction
Which is Not part of hydrogen's line-emission spectrum?
Answer: Aufbau series.
Explanation:
plzzzzzzzzzzzzz help me
Answer: omnivores
Explanation:
I just know
Air Pollution Quiz - Match the terms e defintions
1) Air pollution
2) Acid rain
3) Smog
4) Ground level ozone
5) Global warming
6) Greenhouse effect
Answer:
1) F. harmful gases and solid particles that enter the atmosphere
2) C. pollutant gases react with water vapor
3) B. mixture of smoke, gas, and fog
4) E. sunlight interacts with pollutant gases
5) A. gradual increase in the overall temperature of the earth
6) D. gases are trapped by heat and raise the temperature of the atmosphere
hope this helps
What is the electron configuration for an Atom that has 13 electrons
Help me!!
Question 5 only!
how many atoms are in 3N4010
Answer:
of N ( nitrogen): 12
of O (oxygen): 30
Which unit is used for measuring atomic mass?
Answer: Amu
Explanation:
What information is needed to determine a molecular formula
Answer:
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.
Answer:
The empirical formula and the molar mass.
Explanation:
AP3X
8.
Sulfur trìoxide decomposes to sulfur dioxide and oxygen gas as
shown in the following reaction:
2503 (g) 2502 (g) + O2 (g)
Given a 240.0 g sample of sulfur trioxide (MM = 80.1 g/mol), how many
grams of oxygen (MM = 32.0 g/mol) are produced, assuming the
decomposition goes to completion?
g
Your answer should be rounded to three significant figures. Do not include units in your
answer
Mass of Oxygen : 47.9
Further explanationGiven
2S03 (g)⇒ 2S02 (g) + O2 (g)
240 g SO3
Required
mass of Oxygen
Solution
mol SO3 :
= 240 g : 80.1 g/mol
= 2.996
From the equation, mol O2 :
= 1/2 x mol SO3
= 1/2 x 2.996
= 1.498
mass O2 :
= 1.498 mol x 32 g/mol
= 47.9
Taking into account the reaction stoichiometry, given a 240.0 g sample of sulfur trioxide, 47.95 grams of oxygen are produced, assuming the decomposition goes to completion.
Reaction stoichiometryIn first place, the balanced reaction is:
2 SO₃ → 2 SO₂ + O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
SO₃: 2 molesSO₂: 2 moles O₂: 1 moleThe molar mass of the compounds is:
SO₃: 80.1 g/moleSO₂: 64.1 g/mole O₂: 32 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
SO₃: 2 moles ×80.1 g/mole= 160.2 gramsSO₂: 2 moles ×64.1 g/mole= 128.2 grams O₂: 1 mole ×32 g/mole= 32 gramsMass of oxygen producedThe following rule of three can be applied: if by reaction stoichiometry 160.2 grams of SO₃ form 32 grams of O₂, 240 grams of SO₃ form how much mass of O₂?
[tex]mass of O_{2} =\frac{240 grams of SO_{3}x 32 grams of O_{2} }{160.2grams of SO_{3}}[/tex]
mass of O₂= 47.94 grams
Given a 240.0 g sample of sulfur trioxide, 47.95 grams of oxygen are produced, assuming the decomposition goes to completion.
Learn more about the reaction stoichiometry:
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