Answer: 1.22 litres
Explanation: in STP conditions amount of substance n= V/Vm
Vm is molar volume of gas, 22.41 litres/ mole.
Volume V = n·Vm= 0.068 mol·22.41 l / mol= 1.52388 litres
Define the unit of current. Name the device which is used to measure
electric current in a circuit. plzz helpp
Answer:
Explanation:
The Unit Of Current is defined as the flow of 1 coulomb of charge in one second . Its unit is Ampere.
An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
The unit for work is the _______ which is also called the ____________.
Identify at least three control variables that could be used with this investigation: What temperature allows for bacterial growth to occur quickly?
Answer:
Time allowed for incubation, size of the dish, the amount of light, amount of agar, the type of agar…etc
Explanation:
We define a control variable as any variable that has to be held constant during a study.
If i wish to study what temperature allows for bacterial growth to occur quickly, i will have to subject different bacterial cultures to different temperatures.
The variables that must remain the same across all these cultures at different temperatures is what we call the control variables. They ensure that the results of the study are reliable.
Such variables include but are not limited to;
Time of incubationSize of the dishAmount of lighthttps://brainly.com/question/17606920
Version: TAKEHOME
1) The ionic compound below is soluble in water. Complete the following:
-Draw the interaction of the ionic compound and water in the proper orientation. 3pts
-On the line below discuss the strength of the interaction within the compound compared to the strength of interaction
between the compound and water.
Answer:
The hydrogens of the water molecules around the bromide ion will need to be faced toward it, whereas the oxygens of the water molecules around the potassium ion will need to be faced toward it.
The strength of the interaction within the compound will supersede that of the interaction between the compound and water.
Explanation:
To answer this question, you need to be aware of the structure of a water molecule and its components. A water molecule has the chemical formula of H2O, and oxygen is inherently electronegative, meaning that it attracts electrons very strongly. As a result, when it is in H2O, it pulls the valence electrons of the H atoms very strongly, which results in the H atoms being partially positively charged and the O atom being partially negatively charged. Therefore, the O atom is going to be attracted to the potassium ion, whereas the H atom is going to be attracted to the bromide ion.
The answer to the second part of the question is as written above because ionic bonds are stronger than ion-dipole bonds; that's just the way it is.
Why do you think it is a bad idea to use taste, touch, or smell to identify an
unknown chemical?
Answer:
Because it can cause health problems or injuries to our sense organs.
Explanation:
Chemicals in the laboratory are made up of different constituents, which may be dangerous or injurious to health. This is the reason why safety measures or precautions have to be taken when working in the laboratory. One of those safety measures is that "one should never use taste, touch, or smell to identify an unknown chemical".
This is so because a chemical that is unknown amounts to the fact that what such chemical contains is unknown, hence, the chemical might have the ability to cause harm or injuries to the sense organ. For example, a conc. acid that is tasted will burn the tongue etc.
What does chlorination do?
Answer: Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses. Different processes can be used to achieve safe levels of chlorine in drinking water.
Please answer ASAP,
Why does the earth experience high tides?
High tides occur because Jupiter is in alignment with Saturn
The gravitational force of the moon attracts the water and solid earth, pulling them closer to the moon
The gravitational pull of the moon causes areas of water that bulge away from the earth.
High tides occur because the comet Neowise passed by Earth
Answer:
B
Explanation:
I took the test and GOT an A
PLEASE HELP!!!
i’m tried and i wanna go to sleep♀️
How many formula units are there in 20.6 moles of Al(NO3)3?
Answer:
How many moles Al(NO3)3 in 1 grams? The answer is 0.0046949186022713.
We assume you are converting between moles Al(NO3)3 and gram.
You can view more details on each measurement unit:
molecular weight of Al(NO3)3 or grams
This compound is also known as Aluminium Nitrate.
The SI base unit for amount of substance is the mole.
1 mole is equal to 1 moles Al(NO3)3, or 212.996238 grams.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between moles Al(NO3)3 and gram.
Type in your own numbers in the form to convert the units!
Explanation:
How is the periodic table used to determine properties of elements
Answer:
I don't know
Explanation:
hindi ko alam
2. What evidence is there that mass extinction events occurred?
Answer: Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one. Examples, of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
CH4O+ O2 → CO2 + H2O
Balance the following chemical equation
Answer:
2 CH4O + 3 O2 = 2 CO2 + 4 H2O
If 35.4 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP?
Answer:
ujdbdbfbf fbFbsygtsjysnsgndhngsnsgnafbfa
(Answer ASAP)
In which state(s) of matter could a substance have thermal energy?
A) Only liquids and gases
B) Only liquids and solids
C) Only liquids
D) Liquids, solids, and gases
Our Solar System consists of our star, the Sun, and its orbiting planets (including Earth), along with numerous moons, asteroids, comet
material, rocks, and dust. However, our Solar System is only part of space. Place the following in order from biggest to smallest.
A) Galaxy, Universe, Solar System, Star, Planet
B) Universe, Solar System, Galaxy, Planet, Star
C) Solar System, Universe, Galaxy, Star, Planet
D) Universe, Galaxy, Solar System, Star, Planet
Answer:
D
Explanation:
Universe consits of galaxies, galaxies consit of solar systems, and solar systems consist of planets
What is the chemical formula (including charge) for the chromate ion?
Answer:
Chromate Chemical Formula
Explanation:
The formula of chromate is CrO42-. The chromate ion usually consists of one chromium atom (+6 oxidation state) and four oxide atoms. The overall charge is -2.
Aptitude Test Formulas: Right Angle Formula
Complex Number Power Formula: Structural F...
Heat Of Solution Formula: Integers Formula
Volume Of Parallelepiped: Prime Number For...
How do heavy metals like cobalt, zinc, mercury, and lead get into the environment, and why are they harmful?
Answer:
How they get into the environment
Ammonia (NH3) clouds are present around some planets. Calculate the number of grams of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen
N2 + 3 H2 -> 2 NH3
30.6 g of ammonia are produced.
Answer:
given
mass of hydrogen =5.4 gram
mass of NH3=?
we have
3 moles of H2=2 moles of NH3
3×2g of H2=2×(14+3) g of NH3
6 g of H2=34 g of NH3
5.4 g of H2=34×5.4/6=30.6 g of NH3
30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.
What is Mole?The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Mass of Hydrogen = 5.4 g
Moles of hydrogen = mass ÷ molar mass
= 5.4 ÷ 2 = 2.7 moles
From the reaction, 3 moles of hydrogen produce 2 moles of ammonia
So, 1 mole of hydrogen will produce 2 ÷ 3 moles of ammonia
Thus, 2.7 moles will give ( 2÷3) × 2.7
= 1.8 moles of ammonia
Mass of ammonia = 1.8 × 17
= 30.6 g
Therefore, 30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.
Learn more about Moles, here:
https://brainly.com/question/20486415
#SPJ2
An illustration of a fire and a pair of hands near the fire.
He concluded that the image shows thermal energy being transferred from the flames to the person’s hands through conduction.
Which best explains Alex’s error?
Thermal energy is being transferred from the person’s hands to the flames.
The image does not show thermal energy being transferred because the molecules of two substances or objects are not in direct contact.
The image does not show conduction because the molecules of two substances or objects are not in direct contact.
Thermal energy is being transferred from the surrounding air to the flames.
Answer:
b
Explanation:
4.2 L of a gas has a pressure of 560mmHg at 72⁰F. What is the temperature at760mmHg if the volume is still 4.2 L? (5 pts)
Answer:
The temperature at 760mmHg if the volume is still 4.2 L is 400.862 K
Explanation:
Gay Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. This law can be expressed mathematically as follows:
[tex]\frac{P}{T} =k[/tex]
Having an initial state 1 and a final state 2, the following is true:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 560 mmHgT1= 72 F= 295.372 K (being 32 F= 273.15 K)P2= 760 mmHgT2= ?Replacing:
[tex]\frac{560 mmHg}{295.372 K} =\frac{760 mmHg}{T2}[/tex]
Solving:
[tex]T2= 760 mmHg*\frac{295.372 K}{560 mmHg}[/tex]
T2= 400.862 K
Can someone plz help me with this one problem plz!!!!
Answer:
very top one is sunlight. 2nd top one is oxygen. 3rd top one is carbon dioxide. last one is water
Which statement describes proper conduct in the laboratory?
Select one:
O a. Eating snacks in the laboratory is allowed.
O b. In order to identify things they should be tasted.
O c. Colorless fumes should be identified by direct smelling.
O d. Be aware of the location of safety and first aid equipment.
Answer:
D.
Explanation:
I mean. It's logic for sure
Answer:
Its D and pls mark brainliest
Explanation:
Using your own words, explain energy.
Arrange these atoms and ions in order of decreasing radius:
K+ Ar Cl-
Answer:
Cl- > Ar > K+
Explanation:
Due to the fact that they have different nuclear charges, it means their radius will be different.
Now, the positive charge (cation) with the greater charge value will possess a smaller radius due to the fact that its electrons will have greater attraction to its nucleus.
So, the lesser the value of the charge, the larger the radius.
In the question, K+ has the highest value of charge and thus the smallest radius while Cl- has the lowest value of charge and thus the largest radius. So the correct order in decreasing size is;
Cl- > Ar > K+
CO(g) + O2(g) CO2(g)
Consider the unbalanced equation above. What is the maximum mass of carbon dioxide that can be formed when 1.45 g of CO and 2.00 g O2 react?
Sam did an experiment. He boiled water in a teapot and saw vapor coming out. When he placed a cold plate in contact with the vapor it formed droplets of water.? Can you imagine what was that process and Why did he observe this?
Answer:
evaporation and condesation
Explanation:
because he was curiuos
Explain why silk was not the ideal material for hot air balloons.
Answer:
Cost of silk was too high
Explanation:
The major reason of not using silk as a fabric in the hot air balloons was high cost of silk. Due to its high cost, silk became unaffordable for use in modern balloon.
If cost is neglected, then silk is the perfect material for hot air balloon as it is light in weight
When chlorine reacts with potassium bromide, chlorine displaces bromine.
Cl2 + 2 KBr → Bra + 2 KCI
Explain why chlorine is more reactive than bromine.
Answer:
Chlorine is more reactive than bromine because the chlorine atom has fewer shells and the electronic bonding is much stronger. The electrons are closer to the nucleus, therefore it is easier for chlorine to attract and hold electrons in its outer shell forming stronger bonds with other atoms.
(As you go down Group 7/the Halogens - they get less reactive)
Chlorine has two stable isotopes, C1 and C If Cl has a mass of approximately 34.97 and Cl has a mass of approximately 3697 what percent abundances are each found in?
Answer:
%C₁ = %C₂ = 50%
Explanation:
Set up simultaneous equations to solve for two unknowns,
let f₁ and f₂ = fractional abundances of C₁ and C₂ respectively.
Then f₁ + f₂ = 1.00 and
34.97f₁ + 36.97f₂ = Wt. Avg. Atomic Mass (amu) = (34.97 + 36.97)/2 = 35.97amu
Solve equation 1 for f₂ = 1 - f₁ and substitute into equation 2
=> 34.97f₁ + 36.97(1 - f₁) = 35.97
=> 34.97f₁ + 36.97 - 36.97f₁ = 35.97
=> 2f₁ = 1
=> f₁ = 1/2 = 0.50 => 50% abundance for C₁
=> f₂ = 1 - 0.50 = 0.50 => 50% abundance for C₂
PLEASEEEE HELPPP??????
Answer:
(B) Grasses to Grasshoppers to Birds to Foxes
Explanation