Mention three careers that have to do with STEM. Use complete sentences when you answer.
what happens when water changes from a solid to a liquid to a vapor
Answer:
It forms a water cycle!
Hope it helps!!!
perspex and polythene are two examples of what?
What is the molar mass of NH4?
Answer:
96.09 grams per mole
Explanation:
The chemical formula of ammonium carbonate is (NH4)2CO3, a chemical compound with a molar mass of 96.09 grams per mole.
Sorry if its wrong! ~Kira
How many moles are in 23 grams of potassium
Answer:
.588mol K
Explanation:
K has a molar mass of 39.1 g/mol. This means that one mole of potassium has a mass of 39.1 grams. We can use stoichiometry/dimensional analysis to figure out how many moles is equal to 23 grams.
[tex]23.0g K(\frac{1 mole}{39.1} ) = .588mol K[/tex]
Most objects are not able to float in midair. What must be occurring for these rings to float instead of fall
Answer:
magnetic force
Explanation:
A magnet is defined as an object that can attract other objects that are made of iron. Magnets also repels or push away other magnets. Every piece of magnets have two poles namely, a south pole and a north pole. When one magnet comes near another magnet, it exerts a magnetic force on the other magnet. This force can be attractive force or repelling force depending upon the poles surface of the magnet that are close to each other.
Like pole repel each other while opposite poles attract each other.
In the context, the rings of magnet are floating in the air because there is a magnetic force that is repelling the like surfaces or the like poles of these magnetic rings.
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Hydrochloric acid (HCl) and sodium sulfide react by forming the gas Hydrogen sulfide and aqueous sodium chloride. Write the complete and net ionic equation for the reaction
Answer:
0.219 mol HCI
Explanation:
Iron(II) sulfide reacts with hydrochloric acid according to the reaction:
FeS (s) + 2HCl (aq) → FeCl2 (s) + H2S (g)
A reaction mixture initially contains 0.223 mol FeS and 0.665 mol HCl.
Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?
How many moles is 130g of CoCl2
Answer:
1 mol
Explanation:
The mass of CoCl2 is 129.83. 130 divided by the mass is 1. This is to convert the mass given to mols that exist in the sample.
giving 300 pts if u get it correct I will put up a separate link so u can get the
Which gases makes up most of Earth’s atmosphere?
Question 1 options:
argon and water vapor
carbon dioxide and oxygen
nitrogen and oxygen
oxygen and argon
Question 2 (1 point)
What is the correct order of earth's atmospheric layers from bottom to top?
Question 2 options:
Mesosphere, Stratosphere, Troposphere, Thermosphere, Exosphere.
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.
Thermosphere, Mesosphere, Stratosphere, Troposphere Exosphere.
Question 3 (1 point)
Which characteristics makes the mesosphere different from the other layers of the atmosphere?
Question 3 options:
It is the lowest layer
It is the largest layer
It is the coldest layer
It is the thinnest layer.
Question 4 (1 point)
Based on the diagram above which change can be observed when moving from the troposphere into the stratosphere?
Question 4 options:
Air pressure decreases
Air particles increase
Temperature increases
Question 5 (1 point)
Certain gases in Earth’s atmosphere slow down the movement of energy away from Earth’s surface by absorbing and re-emitting infrared radiation. This helps to keep the surface of Earth at an average temperature of 15°C (59°F). What is this process called?
Question 5 options:
The Coriolis Effect
The Solar Effect
The Greenhouse Effect
The Global Warming Effect
Question 6 (1 point)
How might the increase of volcanic eruptions affect Earth?
Question 6 options:
It might produce more ozone in the atmosphere
It might decrease temperature across Earth
It might increase the carbon dioxide in the atmosphere
It might cause the Earth’s surface to absorb more oxygen.
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Determine which heat transfers below are due to the process of conduction.
I) You walk barefoot on the hot street and it burns your toes.
II) When you get into a car with hot black leather seats in the middle of the summer and your skin starts to get burned when you touch the seats.
III) A flame heats the air inside a hot air balloon and the balloon rises.
IV) A boy sits to the side of a campfire. He is 10 feet away, but still feels warm.
Question 1 options:
I & II
III & IV
I, II, & IV
II, III, IV
Question 2 (1 point)
Saved
The heat transfer depicted in the image is MOST likely
Question 2 options:
circulation
conduction
convection
radiation
he method of heat transfer by which the sun energy reaches the earth is
Question 3 options:
conduction
convection
radiation
solaration
Question 4 (1 point)
Carol owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air __________ warming the whole house through __________.
Question 4 options:
rises, convection
sinks, conduction
rises, conversion
sinks, radiation
Question 5 (1 point)
The prevailing westerlies are global winds that move from west to east and push most weather in this direction in the United States.
Question 5 options:
True
False
Question 6 (1 point)
Due to the Earth's rotation, global winds follow a curved path known as___.
Question 6 options:
Sea breezes
Wind Direction
Coriolis effect
Wind Chill effect
what are clean sources of energy
solar energy
wind energy
hydro energy
tidal energy
geothermal energy
Consider the following reversible reaction.
Upper C (s) + Upper O Subscript 2 Baseline (g) double arrow Upper C Upper O Subscript 2 Baseline (g)
What is the equilibrium constant expression for the given system?
k Subscript e q Baseline = StartFraction left-bracket Upper C Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C right-bracket left-bracket Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper C Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper C right-bracket left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Subscript 2 Baseline right-bracket EndFraction
Answer:
Keq = [CO₂]/[O₂]
Explanation:
Step 1: Write the balanced equation for the reaction at equilibrium
C(s) + O₂(g) ⇄ CO₂(g)
Step 2: Write the expression for the equilibrium constant (Keq)
The equilibrium constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species. The equilibrium constant for the given system is:
Keq = [CO₂]/[O₂]
Answer:
C on edge
Explanation:
got it correct :)
What is the mass of 3.92 mol of calcium chloride ?
Answer: Do a quick conversion: 1 moles Calcium Chloride = 110.984 gram using the molecular weight calculator and the molar mass of CaCl2.
Explanation:
Answer:
three mole of CaCI2 have a mass of 3•molx110.98•g•mol-1=333•g
If a gas is cooled from 222 K to 125 K and the volume is kept constant, what would be the final
pressure if the original pressure was 760 mmHg?
Is it possible for a reaction with + ΔG° to still be spontaneous in the forward direction? Explain.
Answer:
See explanation.
Explanation:
Hello!
In this case, according to the thermodynamic definition of the Gibbs free energy:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
In the scenario by which G>0 (nonspontaneous) it would be possible for reaction to have a G<0 (spontaneous) if:
- If H>0 and S>0, then the temperature should be increased until the process was entropy-driven for it to be possible.
- If H> and S<0, then it'd be impossible to have an spontaneous process.
- If H<0 and S>0 then the process was not spontaneous.
- If H<0 and S<0 it is possible if the temperature is not high enough to ensure the process is enthalpy-driven.
Best regards!
A sample of oxygen had an initial volume of 4.0L and was at a standard pressure of 10 atm, what would the new volume be if the pressure was increased to 25.00atm?
The new volume would be 1.6 L
How to calculate the new volume of a substance if pressure changes?The best way to calculate the volume of a substance in this situation is to use Boyle's law:
P1V1 = P2V2
In this formula, the initial pressure multiplied by the initial volume is equivalent to the second pressure multiplied by the volume.
Let's now use the values given:
P1V1 = P2V210atm x 4 L = 25atm x V2V2 = 10 atm x 4 L / 25 atmV2= 40 /25V2 = 1.6 LLearn more about Volume in: https://brainly.com/question/1578538
What volume of concentrated 15M H2SO4 is required to prepare 0.75 liters of a 6.0M solution?
Answer:
30 ml
Explanation:
explain the following terms using examples basic oxide acidic oxide an amphoteric oxide
Answer:
Example of basic Oxide: sodium oxide which reacts with water to produce sodium hydroxide.
Example of Acidic Oxide: SO² in acidic oxide reacts with water and produces an acid.
Example of Amphoteric Oxide: ZnO(s)+2HC(aq)→ ZnCI2(aq)+H2O (I)
Explanation:
Hope this helped Mark BRAINLEST!!!!
HELP ME SOLVE THIS WORKSHEET
= 25 X 5 = (use the correct number of sig figs)
Answer:
1.25 *10^2
Explanation:
25*5 = 125
= 1.25 *10^2
ionization refers to the process of what
Answer:
Any process that leads to the dissociation of a neutral atom or molecule into charged particles ions; the state of being ionized.
Explanation:
What are the stages of the life cycle of the sun
Main sequence star - red giant - white dwarf
In Order
What is the final chemical equation from the following intermediate chemical equations?
2 equations. First: upper P subscript 4 upper O subscript 6 (s) right arrow upper P subscript 4 (s) plus 3 upper O subscript 2 (g). Second: upper P subscript 4 (s) plus 5 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 2 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 8 upper O subscript 2 (g) right arrow 2 upper P subscript 4 (s) plus upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 15 upper O subscript 2 (g) right arrow upper P subscript 4 (s) plus upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) StartFraction 5 over 3 EndFraction upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
pls hurry
Answer:
A
Explanation:
edge2021
Answer:
A.
Explanation:
Edge
Help me anyone? Thanks!!!!
Q7: Three identical flasks contain three different gases at standard temperature and pressure. Flask A contains
CH4, flask B contains O3, and flask C contains N2. Which flask contains the largest number of molecules?
Answer:
Flask A
Explanation:
Cause it has high gas temperature
Which property among the following is best suitable for metalloids
1 Brittle and behaves like a non-metal
2 Have the property of metals and non-metals
3 Malleable and ductile
4 Conducts electricity and behaves like a metal
Answer:
2. Have the property of metals and non-metals
Explanation:
A metalloid is a substance that posseses the characteristics of both metals and non-metals. In other words, it can be said to be an intermediary between metals and nonmetals.
According to this question, a metalloid
Among the theories of man's state of nature,which is/are the most credible/Reasonable?,
trees... they bring life nd without trees, there wouldnt be life
True or false. The geological features of the eastern part of South America and western Africa matched each other.
Answer:
True
Explanation:
If you look at a map they look like they connect and the have similarities like mountains
Answer:
It is true c:, I hope I helped yoy
How does air flow when a low-pressure center occurs in the
atmosphere?
Answer:
A
Explanation:
It is so because the low air pressure create vacuum and the air from high pressure area move toward the low air pressure.
Balance the 2 chemical equation below: 1) _____H2 + _____02 ---> _____H20 2) _____CH4 + _____Cl2 ---> _____CCl4 + _____HCl Your answer:
Answer:
1.) 2H2 + O2 ---> 2H2O
2.) CH4 + 4Cl2 ---> CCl4 + 4HCl
Explanation:
In order to balance the equation, you have to make sure there are the same amount of each element on both sides.
Ex (#1). By adding the coefficients infront of H2 and H20, You now have 4 hydrogen's and 2 oxygens on the left side as well as 4 hydrogens and 2 oxygens on the right side.
Sorry if that's confusing, but hope this helps! :)
How is the kinetic energy of the particles of a substance affected during a phase change?
O Kinetic energy increases during exothermic changes and decreases during endothermic changes.
O Kinetic energy decreases during exothermic changes and increases during endothermic changes.
O Kinetic energy does not change, but the potential energy does.
O Kinetic energy changes in the opposite way that the potential energy changes,