When elements chemically combine with each other, what do they Form? A. electrons, B. compounds, C. atoms
Answer:
B
Explanation:
When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).
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A solution with a ph of 5 has how many more hydrogen ions in it than a solution with a ph of 7?
The products of a combustion reaction always include oxygen gas and water vapor.
True
Or
False
Answer:
true
Explanation:
A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor. ... The products of the combustion of hydrocarbons are carbon dioxide and water.
how many electrons are in a titanium atom
Answer:
2, 8, 10, 2
Explanation:
Answer:
2, 8, 10, 2
Explanation: Titanium/Electrons per shell
Need help ASAP please!
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
You need 16 moles of NO(g). How many moles of O2 do you need to start with?
Answer:
13 mol NO
Explanation:
Step 1: Write the balanced equation
4 NH₃(g) + 5 O₂(g) ⇒ 4 NO(g) + 6 H₂O(g)
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of O₂ to NO is 5:4.
Step 3: Calculate the number of moles of O₂ needed to produce 16 moles of NO
We will use the previously established molar ratio.
16 mol O₂ × 4 mol NO/5 mol O₂ = 13 mol NO
Balance the equation.
Fe + Cl2 → FeCl3
A. Fe + 3Cl2 + 2FeCl3
B. Fe + 3Cl2 → FeCl3
C. 2Fe + 3Cl2 + 2FeCl3
Answer:
C. 2Fe + 3Cl2 + 2FeCl3
Explanation:
Hello there!
In this case, according to the given chemical reaction:
Fe + Cl2 → FeCl3
It turns out possible to balance it via cross-multiplying the chlorine atoms as they do not result from a whole number multiplication; it means we get:
Fe + 3Cl2 → 2FeCl3
And we just balance Fe by placing a 2 on Fe:
2Fe + 3Cl2 → 2FeCl3
Thus, the answer is C. 2Fe + 3Cl2 + 2FeCl3
Regards!
What function is most affected if the sepal of a flower is damaged by air pollution?
Answer:answer in explanation try to understand dear
Explanation:Air pollutants have a negative impact on plant growth, primarily through interfering with resource accumulation. Once leaves are in close contact with the atmosphere, many air pollutants, such as O3 and NOx, affect the metabolic function of the leaves and interfere with net carbon fixation by the plant canopy.
Read the following chemical equation.
Cl2 (g) + K+ Br− → K+ Cl− + Br2 (g)
What most likely happens during this reaction?
Potassium loses an electron.
Potassium gains an electron.
Bromine loses an electron.
Bromine gains an electron.
Answer:
Bromine loses an electron.
Explanation:
Hello there!
In this case, according to the given chemical reaction, it will be possible for us to realize that as the reaction progresses, we see that the bromine, as it is initially negative, it increases the oxidation state as it loses an electron for which it is oxidized.
Moreover, no change is potassium is evidenced as it remains as the cation in the reaction; therefore, the answer is Bromine loses an electron.
Regards!
Answer:
The above answer is correct
Explanation:
I took the test
differentiate between homogenous matter and heterogeneous matter?
Answer:
Homogeneous mixture:
These are called solutions.It has a uniform composition.It has only one phase.It cannot be separated physically.The particles appear smaller in size.These are pure substances.These are not visible easily visible to the naked eye and also through a microscope.Examples include milk, gasoline, sugar solution, corn oil, fog, etc.Heterogeneous mixture:
These are called suspensions/colloids.It has a non-uniform composition.There are two or more phases.It can be separated physically.The particles are either smaller or larger in size.These are not pure substances.These are easily visible to the naked eye and also through a microscopeExamples are- a mixture of mud & water, beach sand, vinegar, air cloud, etc.Which of the following would be a correct conversion factor
relating carbon dioxide (CO2) and glucose (C6H1206) using the
balanced equation below?
6CO2 + 6H20C6H12O6 + 602
Answer:6CO2/1C6H12O6
Explanation:
please i need help really quickly on this. thank you
Answer:
the error could have been the fact that the unit for volume wasn't changed from cm³ to dm³
hence the calculation error
the solution to this would be first dividing the volume by 1000 to get that same amount in dm³ which is the standard unit to be used for volume-density calculations
What is said to have occurred when an object experiences a frequency equal to its natural frequency?
frequency
diffraction
resonance
amplitude
Answer: Resonance
Explanation:
A resonance is said to occur when an object experiences a frequency that is equal to its natural frequency.
A resonance refers to the sound that's produced by an object when the object vibrates at an identical rate as the sound waves that is coming from another object.
Therefore, the correct option is C
Which of the following are properties of mechanical waves? (pick more than 1)
A. Waves require a medium or material, to move through
B. Energy is transferred with the motion of the wave.
C. Waves begin at a source with a disturbance.
D. Particles of a medium always move perpendicular to the wave motion.
Answer:
I'd say ALL OF THE ABOVE.
A Mechanical wave is a disturbance that transfers energy as it moves through a medium without displacement of the medium itself.
It can Either be Transversal or Longitudinal.
It is Transversal when the particles of the medium move perpendicular to the wave motion.
It requires a medium and begin at a source with a disturbance
So
ALL THE OPTIONS SEEM LEGIT.
The forces between ________ are examples of electric forces.
A.
charged particles
B.
neutrons
C.
masses
D.
photons
Answer:
The answer would be charged particles.
Explanation:
Electric force exists as one of the most fundamental forces in the universe, it occurs between all charged particles.
3. How many grams of aluminum can be heated from 90°C to 120°C if 500 J of heat energy are applied?
(c = 0.900 J/g °C)
We are given:
Initial Temperature = 90°c
Final Temperature = 120°c
Heat applied(ΔH) = 500 Joules
Specific heat(c) = 0.9 Joules / g°C
Mass of Aluminium(m) = ?
Change in temperature:
ΔT = Final temp. - Inital Temp.
ΔT = 120 - 90
ΔT = 30°c
Calculating the mass:
We know the formula:
ΔH = mcΔT
replacing the values:
500 = m(0.9)(30)
500 = m(27)
m = 500/27
m = 18.52 grams
Magnesium metal reacts with hydrochloric acid to produce hydrogen gas and a solution of magnesium chloride. Write and balance the chemical equation for this reaction, and determine the volume of the hydrogen gas generated (at 1.00 atm, 25 °C) by reacting 10.0 g Mg with an excess of hydrochloric acid
Answer:
Mg + 2 HCl ⇒ MgCl₂ + H₂
10.1 L
Explanation:
Step 1: Write the balanced equation
Mg + 2 HCl ⇒ MgCl₂ + H₂
Step 2: Calculate the moles corresponding to 10.0 g of Mg
The molar mass of Mg is 24.31 g/mol.
10.0 g × 1 mol/24.31 g = 0.411 mol
Step 3: Calculate the moles of H₂ produced from 0.411 moles of Mg
The molar ratio of Mg to H₂ is 1:1. The moles of H₂ produced are 1/1 × 0.411 mol = 0.411 mol
Step 4: Calculate the volume occupied by 0.411 moles of H₂
0.411 moles of H₂ are at 1.00 atm and 25 °C (298 K). We can calculate the volume occupied using the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 0.411 mol × (0.0821 atm.L/mol.K) × 298 K / 1.00 atm = 10.1 L
please I need help with this it is A(n)_______ is made of the same_______all the way through.
Answer:
hi the ans is A.
..............
When KCl(s) is dissolved in water, the resulting solution is classified as a
O heterogeneous compound
O homogeneous compound
O heterogeneous mixture
O homogeneous mixture
Answer:
O homogeneous mixture
Explanation:
When Kci is dissolved in water it becomes a solute in O homogeneous mixture
The state of matter of a substance is a physical property. A. True B. False
Answer:
I THINK IT IS TRUE BECAUSE THEY ERE FIRST FOUND TO DEMOCRITUS ARISTOTLE AND PLATO THE ROMANS AND GREEK CHEMISTS .
Explanation:
A patient with severe metabolic acidosis has a blood plasma pH of 6.90
What is the [OH−] of the blood plasma?
Answer:
7.94x10⁻⁸ M
Explanation:
Using the pH given by the problem, we can calculate the pOH of the blood plasma:
pOH = 14 - pHpOH = 14 - 6.90pOH = 7.10Then we can proceed to calculate the [OH⁻] of the blood plasma, using the definition of pOH:
pOH = -log[OH⁻]7.10 = -log[OH⁻]-7.10 = log[OH⁻][tex]10^{-7.10}[/tex] = [OH⁻][OH⁻] = 7.94x10⁻⁸ MWhich shows a triglyceride?
Answer:
A
Explanation:
A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids (from tri- and glyceride). Triglycerides are the main constituents of body fat in humans and other vertebrates, as well as vegetable fat.
The structure of option A shows a triglyceride.
What is triglyceride?Triglycerides are a kind of fat present in the blood. Triglycerides are the types of stored fats, which are not in use currently.
The structure of triglyceride is TRI esters containing glycerol bound to three fatty acid molecules.
Thus, the correct option is A.
Learn more about triglyceride
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For each of the salts below, match the salts that can be compared directly, using Ksp values, to estimate solubilities.
a. Mg(OH)2
b. CaSO3
c. BaCrO4
d. CaS
1. copper (II) sulfide
2. zinc hydroxide
Answer:
1 - Salts required that can be compared directly, using Ksp values, to estimate solubilities for copper (II) sulfide are - [tex]CaSO_3[/tex] (Option b) ,[tex]BaCrO_4[/tex] (Option c) and [tex]CaS[/tex] (Option d)
2 - Salts that can be compared directly, using Ksp values, to estimate solubilities for zinc hydroxide are - [tex]Mg(OH)_2[/tex] (Option a)
Explanation:
[tex]K_s_p[/tex] values can be used to compare the solubility of salts that produce ions in a 1:1 ratio.
[tex]CuS[/tex] {copper (II)sulfide} dissociates with ions in ratio 1:1 .Because the salts [tex]CaSO_3[/tex] , [tex]BaCrO_4[/tex] and [tex]CaS[/tex] have a 1:1 ion ratio, the solubilities of options b, c, and d can be compared to salt 1.
[tex]K_s_p[/tex] Values can be used to compare the solubility of salts that produce ions in a 1:2 or 2:1 ratio.
2. [tex]Zn(OH)_2[/tex] dissociates into ions in ratio 1:2 .
Because the ions in the salt [tex]Mg(OH)_2[/tex] are in a 1:2 ratio, the solubility of salt 2 can be compared to that of salt 'a'.
Hence , Salt 1 is matched with options b , c , d.
Salt 2 is matched with option a.
Which two combinations will give you a TALL plant?
TT with Tt
or TT with TT
would give a tall plant
Describe the De Borglie's hypothesis
Answer:
The De Broglie hypothesis proposes that all matter exhibits wave-like properties and relates the observed wavelength of matter to its momentum. After Albert Einstein's photon theory became accepted, the question became whether this was true only for light or whether material objects also exhibited wave-like behavior.
can anyone help with this mole to mole/mole to grams question? any help would be greatly appreciated! Thanks!
Answer:
Explanation:
a) 3.00 mol Cu x 2 mol Ag/ 1 mol Cu = 6 mol Ag
b) 3.00 mol Cu x 2 mol Ag/1 mol Cu x 107.87g Ag/ 1 mol Ag = 647.22g Ag
c) 3.00 mol Cu x 1 mol Cu(NO3)2/ 1 mol Cu = 3 mol Cu(NO3)2
d) 3.00 mol Cu x 1 mol Cu(NO3)2/ 1 mol Cu x 187.54g/ 1 mol Cu(NO3)2 =562.644g Cu(NO3)2
How many moles are in 67.94 liters of O2?
I need this answered asap
Answer:
3.033
Explanation:
67.94/22.4= 3.033
I hope lol
There is a ______that shoots out hot water every day.
Geyser
Volcano
Hot spring
Fumarole
Tectonic
Answer:
geyser shoots out hot water everyday
What are alleles? Are theys ame or different
Answer:
Kind of like DNA or a part of DNA
Explanation:
They are what make you a person, no they aren't the same
can someone please do this for me
2K(s) + F₂(g) --> 2KF(s)
The physical stare of potassium is solid(s) and that of potassium fluoride is solid(s) so, s will be put on both the blanks.
Now, In order to balance florine, we will put 2 for potassium floride, afterwards florone will be 2 on both side of equation but now potasium will become unbalnced so, we will put 2 for potassium. Thus, both sides of the equation will be balanced.
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P.S- Sorry, If I fail in properly explaining it to you.
Bottle A is filled with air, and Bottle B is filled with carbon dioxide of equal temperatures. Each bottle is placed 50 cm from a heat source, and the temperature inside each bottle is recorded every 5 minutes. Which statement describes the results of the experiment after an hour?
a. The temperatures in the bottles increased equally.
b. Bottle B has a higher temperature than Bottle A.
c. Bottle A has a higher temperature than Bottle B.
d. The temperature of neither bottle increased.
Answer:
Bottle B has a higher temperature than Bottle A.
Explanation:
We have to consider something very important here and that is the ability of the molecules of CO2 and those of air to trap heat.
CO2 molecules are better able to trap heat since it is among the green house gases.
Since CO2 is a greenhouse gas, the temperature of bottle B is higher than that of bottle A because more heat is trapped by the gas in bottle B than the gas in bottle A.