Answer:
Citric acid
Explanation:
Answer:
On edge it is C or option 3 citric acid
Explanation:
What gases do scientists think may have been in the early atmosphere? *
Compare The atomic number
of potassium is 19. How does
potassium-39 differ from
potassium-41?
Answer:
They are different ions of the same element.
Explanation:
on Quizlet
Is Cellular Respiration a carbon sink or source???
Answer: Carbon source
Need help urgently!!
If samples of two different elements each represent one mole,
a
heir molar masses are equal.
b
they contain the same number of atoms.
c
they are equal in mass.
d
they have the same atomic mass.
Answer:
it's-D...........................
In a 5.609g of H20, how many molecules H20
arc
present?
Answer:
1.88 x 10²³molecules of H₂O
Explanation:
Given parameters:
Mass of H₂O = 5.609g
Unknown:
Number of molecules of H₂O = ?
Solution:
To solve this problem, we need to find the number of moles of given compound first.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of H₂O = 2(1) + 16 = 18g/mol
Number of moles = [tex]\frac{5.609}{18}[/tex] = 0.31mole
From mole concept;
1 mole of a substance contains 6.02 x 10²³molecules
0.31 mole of H₂O will therefore contain 0.31 x 6.02 x 10²³molecules
= 1.88 x 10²³molecules of H₂O
How many atoms in 4.5 moles of carbon (C)?
Answer:
34 atoms
Explanation:
The formula that forms when Magnesium and Permanganate bond
Can someone help me with the answer because I'm not good with chemistry
atomic weight of nitrogen,aluminium and calcium
Answer:
Atomic weight of(N) nitrogen is 14.0067
(Al)Aluminium is 26.98154
(Ca) calcium is 40.48
Explanation:
I hope it's helpful!
How many electrons can be present in an atom having three principal
energy levels? *
Answer:
18 electrons
Explanation:
The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons. The fourth and higher levels have an f sublevel in addition to the s, p, and d orbitals.
Answer:
18 electrons
Explanation:
The five d orbitals can hold up to 10 electrons. Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.
The analysis of 2.12 of a compound gave 0.33 of carbon, 1.82 of the same compound gave 1.53 of sulphur. Calculate the emperical formula
Answer:
CS₂
Explanation:
To find the empirical formula we need to determine first the percentage of each atom in the molecule. Then, we need to find the moles and, as empirical formula is the simplest whole-number ratio of atoms we can solve the empirical formula:
%C:
0.33gC / 2.12g * 100 = 15.6%
%S:
1.53g S / 1.82g * 100 = 84.1%
In a basis of 100, the moles of each atom are:
C:
15.6g C * (1mol / 12.01g) = 1.30 moles
S:
84.1g S * (1mol / 32.065g) = 2.62 moles
The ratio of Sulphur-Carbon is:
2.62mol / 1.30mol = 2
That means empirical formula is:
CS₂Three common gaseous compounds of nitrogen and oxygen of different elementary composition are known: (A) laughing gas containing 63.65% nitrogen, (B) a colorless gas containing 46.68% nitrogen, and (C) a brown toxic gas containing 30.45% nitrogen. Show how these data illustrate the law of multiple proportions.
Answer:
Please find how these data prove the law of multiple proportions below
Explanation:
The law of multiple proportions was proposed by an English chemist called John Dalton. The law states that when two elements combine and to form more than one compound. The weights/masses of the second element in the two compounds, which combines with a fixed ratio of the first element, is in a simple whole number ratio.
In this question, Nitrogen is said to combine with oxygen to give three different compounds as follows:
A) laughing gas containing 63.65% nitrogen i.e. 0.6365g
This means that the mass of oxygen will be (1-0.6365) = 0.3635g
B) colorless gas containing 46.68% nitrogen i.e. 0.4668g
This means that the mass of oxygen will be 0.5332g
C) brown toxic gas containing 30.45% nitrogen i.e. 0.3045g
This means that the mass of oxygen will be 0.6955g
The ratios of oxygen in the three compounds is therefore:
0.3635: 0.5332: 0.6955
Divide this ratio by the smallest number (0.3635)
0.3635/0.3635 = 1
0.5332/0.3635 = 1.467
0.6955/0.3635 = 1.913
Multiply this ratio by 2, we have:
2: 2.9 : 3.8
Hence, the simple whole number ratio is 2:3:4.
This proves the law of multiple proportions that oxygen is in simple whole number ratio in the three different compounds.
If 4 moles of O2 and 8 moles of N2 occupy a 12 L
container at a pressure of 6 atm, what is the partial
pressure of N2?
Answer:
P(N₂) = 4.02 atm
Explanation:
Number of moles of O₂ = 4 mol
Number of moles of N₂ = 8 mol
Total pressure = 6 atm
Partial pressure of N₂ = ?
Solution:
We will calculate the partial pressure by using mole friction.
P(N₂) = X(N₂)P(total)
X(N₂) = mol friction = moles of N₂ / total number of moles
X(N₂) = 8 mol / 12 mol = 0.67
Partial pressure of N₂:
P(N₂) = X(N₂)P(total)
P(N₂) = 0.67 × 6 atm
P(N₂) = 4.02 atm
Aluminum reacts with oxygen to produce aluminum oxide. If I give Tanya 3.2 grams of aluminum, how many g of oxygen does she need??
Al + O2 ---》 Al203
I wrote it out as it was easier to visualise that way, youll need to tap to see the full pic. feel free to comment if u have qns :)
Calculate the second volumes. 51.7 L at 27 C and 90.9 KPa to STP
The second volume : 42.2 L
Further explanationGiven
51.7 L at 27 C and 90.9 KPa
Required
The second volume
Solution
STP = P₂=1 atm, T₂=273 K
T₁ = 27 + 273 = 300 K
P₁ = 90.9 kPa = 0,897 atm
Use combine gas law :
P₁V₁/T₁ = P₂V₂/T₂
Input the value :
0.897 x 51.7/300 = 1 x V₂/273
V₂= 42.20 L
When you lie down on a mattress the force of ______ pulls your mass towards the floor, while the force of the mattress pushes back up resulting in _______ forces, which allow you to sleep comfortably.
Answer:
1 gravity 2 counteractive
Explanation:
in the food web above which organism has the least amount of energy available?
A. caterpillar
B. Squirrel
C. Fox
D. Shrubs
Which of these is a chemical property of a substance?
Compressibility
Ductility
Reactivity
Size and shape
Answer:
Reactivity
Explanation:
Answer:
Reactivity
Hope This Helps!!!
3. Nicole plans an investigation to determine the Sun's role in the water cycle. She
places a tomato plant in the sunshine and one in a darkened room. She puts a clear
plastic bag around a leaf on both plants. She waters the plants daily with the same
amount of water. After two days, she notices that there are water droplets on the
inside of the plastic bag on the plant that is in the sunshine. What part of the water
cycle does her experiment show?
A.
B.
It shows how sunlight triggers infiltration in the plant.
It shows how sunlight triggers evaporation in the plant.
It shows how sunlight triggers precipitation in the plant.
It shows how sunlight triggers transpiration in the plant.
C.
D.
Answer:
It shows how sunlight triggers transpiration in the plant.
Explanation:
The water eventually is released to the atmosphere as vapor via the plant's stomata — tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves are known as transpiration.
Phase of matter found in the sun and stars
Solid
Liquid
Gas
Plasma
Answer:
Your answer is Plasma which is D.
Explanation:
This is because lighting can be structed in the sky near stars or sun.
Dis fo chem try n answer it ig.
which type of radiation is blocked by wood?
Answer:
Beta Particals
Explanation:
Beta particles are lighter than alpha particles, and they have a greater ability to penetrate other materials. A thin sheet of metal or plastic or a block of wood can stop beta particles.
I need a answer quick. PLEASE
What is the volume of 2.43 x 1023 molecules of N2 gas at STP?
Foods that are basic can be identified
by what taste?
astr
A. Salty
B. Sour
C. Bitter
D. Sweet
Answer:
sour!
Explanation:
Using the periodic table, choose the more reactive non-metal.
S or As
The most reactive non metal is called Astantine(As)
Select the correct answer.
Which of these is always equal to the molar mass of any element?
ΟΑ. .
its atomic number
OB.
its atomic weight
OC.
its atomic formula
OD.
its atomic structure
Reset
Next
Answer:
its atomic weight
Explanation:
Place these waves in order from shortest wavelength to longest.
sound waves, light waves, ocean waves
Ocean waves aren't technically related to this. Sound waves are shorter than
light waves, depending on the type of light wave.
CH3CH = CHCH3 *
A. alkane
B. alkene
C. alkyne
Answer:
B
Explanation:
when present
double bond the copound is alkene
Gasone provides the energy that powers many car engines. In an engine, gasoline and oxygen are mixed together and burned, creating carbon dioxide gas and water vapor. This process releases energy that the engine uses to turn the wheels, making the car move. Complete the sentence.
Answer:
In the forward direction and releases carbondioxide gas from backside.
Explanation:
In the forward direction and the carbondioxide gas which is a waste material is removed from the engine at the back. The chemical energy of fuel is converted into mechanical energy with the help of engine which able the car to move in the forward direction so engine is the key component that is responsible for the movement of car.
Answer:
In the forward direction and releases carbondioxide gas from backside.
Explanation:
What is the melting point of water? I need help
Answer:
You're answer is B.
Explanation:
I'm extremely sorry if that's wrong.
