Answers
Answer:
step 2
Explanation:
ofcourse rocks dont melt
maybe lol
Related Questions
How many moles are in 2.8x10^24 atoms of silicon?
Answers
Answer:
4.6 mol Si
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 2.8 × 10²⁴ atoms Si
[Solve] moles Si
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 2.8 \cdot 10^{24} \ atoms \ Si(\frac{1 \ mol \ Si}{6.022 \cdot 10^{23} \ atoms \ Si})[/tex][DA] Divide [Cancel like units]: [tex]\displaystyle 4.64962 \ mol \ Si[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
4.64962 mol Si ≈ 4.6 mol Si
Organisms that depend on other organisms for food are consumers. Which consumer you think is a herbivore (eats plants only)?
Answers
Answer:
Prairie dog#3
Explanation:
:)
Would an alkali metal make a good replacement for tin in a tin can? Explain.
Answers
Answer:
No
Explanation:
If tin is heated, it can react with alkalis' with the release of hydrogen.
Tin is a great metal that is used for packaging purposes.
It does not react with any acid that may be present in the food material stored inside the tin can which makes it a useful metal. It keeps the food safe.However, if the tin in the tin can is replaced with alkali metals then they will readily react with the acid present in the food materials stored inside, thereby rendering the food unsafe.
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A heterogeneous mixture always contains
only one substance.
O more than two substances.
O two or more substances that are visibly distinguishable.
O two or more substances that are not visibly distinguishable.
Answers
Answer:
two or more substances that are visibly distinguishable.
ILL MARK BRAINLIEST :)
Describe the law of conservation of mass in your own words *DO IT IN YOUR OWN WORDS PLEASE*
Answers
Explanation:
According to the law of conservation of mass, mass can neither be created nor destroyed but it can simply be transformed from one form to another.
For example, [tex]Na^{+} + Cl^{-} \rightarrow NaCl[/tex]
Mass of Na = 23 g/mol
Mass of Cl = 35.5 g/mol
Sum of mass of reactants = mass of Na + mass of Cl
= 23 + 35.5 g/mol
= 58.5 g/mol
Mass of product formed is as follows.
Mass of NaCl = mass of Na + mass of Cl
= (23 g/mol + 35.5) g/mol
= 58.5 g/mol
As mass reacted is equal to the amount of mass formed. This shows that mass is conserved.
As a result, law of conservation of mass is obeyed.
how many carbon atoms are in 26-hydrogen alkyne
Answers
Help i’m taking a test!!
What new element is formed from the equation below? (Answer form is
MN:, AN: , S)
Answers
Answer:
Element Z
Explanation:
I hope this is correct and helps you!
What do plants do with sugar? *
Release it through their stoma
Eat it for energy
Convert it into oxigen
Convert it into water
Answers
Answer:
its B .Eat it for energy.
what is chemical bonding?
Answers
Answer:
Chemical bonding - a mutual adhesion of atoms in an molecule and the crystal lattice.
Explanation:
Hope you have a great day
How many moles of NO are made from
mixing 7.2 moles of NH3 and 9.6 moles
of O? Identify the limiting reagent.
Answers
Answer:
216 g of NO
Explanation:
We begin from the reaction:
4NH₃ + 5O₂ → 4NO + 6H₂O
We determine the limiting reactant with the moles of each reactant:
4 moles of ammonia react to 5 moles of oxygen
Our 7.2 moles of ammonia may react to (7.2 . 5) /4 = 9 moles
It's ok because we have 9.6 moles of oxygen. 0.6 moles still remain.
5 moles of oxygen react to 4 moles of NH₃
Our 9.6 moles of oxygen may react to (9.6 . 4) /5 = 7.68 moles
We only have 7.2 moles of NH₃ and we need 7.68; so there is no enough ammonia and that's our limiting reagent.
Now we determine the moles of product.
4 moles of ammonia can produce 4 moles of NO
Definetely our 7.2 moles, will produce 7.2 moles of oxide.
We convert to mass: 7.2 mol . 30 g/mol = 216 g
True or False?
When it is summer in the Northern Hemisphere, it is summer all around the word
Answers
What will the volume be of 50 moles of helium at 25°C and 2.5 atm?
Answers
Find the total pressure (in atm) of a mixture that contains 3 gases with the following partial pressures. Gas A is 4.2atm, Gas B is 780 mmHg, Gas C is 250.00kPa
Answers
Answer: The total pressure of given mixture that contains 3 gases is 7.68 atm.
Explanation:
Given: Partial pressure of gases is:
Gas A = 4.2 atm
Gas B = 780 mm Hg
Convert mm Hg into atm is as follows.
[tex]1 mm Hg = 0.00131579 atm\\780 mm Hg = 780 mm Hg \times \frac{0.00131579 atm}{1 mm Hg}\\= 1.02 atm[/tex]
Gas C = 250 kPa
Convert kPa into atm as follows.
[tex]1 kPa = 0.00986923 atm\\250 kPa = 250 kPa \times \frac{0.00986923 atm}{1 kPa}\\= 2.46 atm[/tex]
Total pressure is the sum of partial pressures of gases present in the mixture.
Therefore, total pressure of given mixture is calculated as follows.
[tex]P_{total} = P_{A} + P_{B} + P_{C}\\= 4.2 atm + 1.02 atm + 2.46 atm\\= 7.68 atm[/tex]
Thus, we can conclude that the total pressure of given mixture that contains 3 gases is 7.68 atm.
If I have 6 moles of a gas at a pressure of 10.6 atm and a volume of 48 liters, what is the temperature of this gas?
An unknown quantity of gas is at a pressure of 14.5 atm, a volume of 45 liters, and a temperature of 97 0C, how many moles of gas exist in this situation?
Answers
Answer: 1). The temperature of this gas is 1032.88 K.
2). There are 21.48 moles of gas exist at a pressure of 14.5 atm, a volume of 45 liters, and a temperature of [tex]97^{o}C[/tex].
Explanation:
1). Given: No. of moles = 6 moles
Pressure = 10.6 atm
Volume = 48 L
Formula used to calculate temperature is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 atm
T = temperature
Substitute the values into above formula as follows.
[tex]PV = nRT\\10.6 atm \times 48 L = 6 mol \times 0.0821 L atm/mol K \times T\\T = \frac{10.6 atm \times 48 L}{6 mol \times 0.0821 L atm/mol K}\\= \frac{508.8}{0.4926} K\\= 1032.88 K[/tex]
Hence, temperature of this gas is 1032.88 K.
2). Given: Pressure = 14.5 atm
Volume = 45 L
Temperature = [tex]97^{o}C = (97 + 273) K = 370 K[/tex]
Formula used to calculate number of moles is as follows.
[tex]PV = nRT\\14.5 atm \times 45 L = n \times 0.0821 L atm/mol K \times 370 K\\n = \frac{14.5 atm \times 45 L}{0.0821 L atm/mol K \times 370 K}\\= \frac{652.5}{30.377} mol\\= 21.48 mol[/tex]
Hence, there are 21.48 moles of gas exist at a pressure of 14.5 atm, a volume of 45 liters, and a temperature of [tex]97^{o}C[/tex].
On the left a Circuit A, which is a square box. The top, left, and right sides have circles with X's in them. The bottom side has a stack of vertical lines, which are from left to right very short, short, very short, short. On the right a Circuit B, which is a square box. 2 extra lines cross the box near its top, parallel with the top side. The top side and the 2 extra lines have circles with X's in them. The bottom side has a stack of vertical lines, which are from left to right very short, short, very short, short.
Use the diagram and drop-down menus to answer each question.
Which circuit is a parallel circuit?
Which circuit is a series circuit?
In which circuit do the light bulbs all shine at their maximum brightness?
Answers
Answer:
B A B sorry if its wrong
Explanation:
Circuits can be connected in series or parallel but the maximum voltage is obtained in series connection, thus, light bulbs shine brightest in series connection.
What is parallel and series connection in a circuit?A parallel circuit connection is one in which the terminals of all the components in th circuit meet at two points.
The components are parallel to each other and current flows in multiple directions.
A series connection in a circuit is one in which the terminals of the component parts in a circuit are joined end to end. Current flows in one direction.
The voltage in a series connection is the sum of all the individual cells, therefore, the light bulb in series connection shines brightest.
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HELP ASAP
In which reaction are the atoms of elements rearranged?
Answers
Explanation:
A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does.
In a chemical reaction, the atoms and molecules that interact with each other are called reactants.
In a chemical reaction, the atoms and molecules produced by the reaction are called products.
In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed.
In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Answer:
It is B
Explanation:
The formation of water is a chemical reaction which rearranges atoms. The other reactions are nuclear reactions.
What is the hydroxide ion concentration of a solution with a pH of 4?
A. 1x10^-4
B. 1x10^-7
C. 1x10^-14
D. 1x10^-10
Answers
Answer:
Jules
Explanation:
Birds use their feathers for flight and fluff their feathers to keep warm. Based on Natalia's feather experiment, how do oil spills affect birds’ ability to use their feathers?
Answers
Answer:
As shown previously on Natalia's experiment, oil spills will dangerously affect birds' abilities to user their feathers. When oil gets on a feather, the mass of it increases and it becomes soggy and wet. If birds try to go in water like the ocean, it will not get any better because the ocean is cold. Flying won't be easy because they have additional weight stuck to them.
Explanation:
Hope this helps you!
When you mix water and salt you get a.
Answers
The best way to increase the amount of a solid solute dissolved in a saturated solution would be to
Answers
Answer:
The solubility of a saturated solution can be increased by increasing the temperature.
Explanation:
Temperature -- Generally, an increase in the temperature of the solution increases the solubility of a solid solute. For example, a greater amount of sugar will dissolve in warm water than in cold water. A few solid solutes, however, are less soluble in warmer solutions.
How do textbooks usually describe Le Châtelier's famous principle
Answers
Answer:is an observation about chemical equilibria of reactions. It states that changes in the temperature, pressure, volume, or concentration of a system will result in predictable and opposing changes in the system
Explanation:
How many electrons does GeH4 have
Answers
Ge has 32 electrons. H has 1 electron.
32 + 1(4) = 36
what do electrons in the same shell have in common
Answers
Answer:
They have the same amount of energy. They are all positively charged. They are all made up of atoms.
Answer:
they have the same quantity of energy...
A car engine produces 604 kJ of mechanical energy from fuel capable of producing 2416 kJ of energy. The efficiency of the engine is
Answers
A car engine produces 604 kJ of mechanical energy from fuel capable of producing 2416 kJ of energy, then efficiency of the engine is 25%.
How do we calculate efficiency?We can calculate the efficiency by using the below equation as:
Efficiency = (Actual production / Theoretical production) × 100%
Given that,
Actual production = 604 kJ
Theoretical production = 2,416 kJ
On putting values in given equation, we get
Efficiency = (604/2,416) × 100% = 25%
Hence efficiency of the engine is 25%.
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What is the percent by mass of carbon in carbon dioxide (CO2)?
A. 27%
B. 33%
C. 43%
D. 73%
Answers
what does climate change have to do with glacial change
Answers
Answer:
Because glaciers are so sensitive to temperature fluctuations accompanying climate change. so if it gets hotter then the ice glaciers will melt.
Explanation:
How many grams of copper (II) oxide will react with 10 liters of hydrogen gas?
Answers
Answer:
maybe 200g
I don't know thats just a guess
HOPE ITS TURE
How many pairs of electrons are shared by adjacent carbon atoms in an alkane?
Answers
Answer:
one
Explanation:
True or False: Molecular formula gives you the smallest whole number ratio of elements in a compound. *
Answers
Answer:true
Explanation:The molecular formula indicates the exact number of atoms in the molecule. The empirical formula expresses the smallest whole number ratio of the atoms in the element.
How is entropy related to the spontaneity of a reaction? AP3X
Answers
Answer:
S>0 contributes to spontaneity.
Explanation:
i just took the test on a pex :)
According to the law of thermodynamics, the relationship between entropy and the spontaneity of a reaction is S > 0.
What is entropy?Entropy is the total amount of energy in a closed system that is present there, but there are no uses for that energy. It is the unused energy for any work.
By the second law of thermodynamics, any spontaneous process results in an increase in the universe's overall entropy. The total of the entropy produced by the spontaneous process and the change in energy brought on by the heat flow is known as the net change in entropy of the system or S.
The reaction will be spontaneous if the delta G is negative. Delta G is the Gibbs free energy. So the entropy S will be greater that the reaction.
The Gibbs free energy equation is:
△G = △H − T△S
Thus, the relation is S > 0.
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