Answers
explanation for qn:
when converting units, u can show your working in the form
37.5 × 1g/1ml, then convert the g and ml into 1/1000 kg and L, and calculate from there. In the end, u find out its actually a trick qn and 1g/ml = 1 kg/L
Related Questions
Which of these is a chemical property of a substance?
Compressibility
Ductility
Reactivity
Size and shape
Answers
Answer:
Reactivity
Explanation:
Answer:
Reactivity
Hope This Helps!!!
Is Cellular Respiration a carbon sink or source???
Answers
Answer: Carbon source
How many electrons can be present in an atom having three principal
energy levels? *
Answers
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.
atomic weight of nitrogen,aluminium and calcium
Answers
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!
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
Answers
Answer:
its atomic weight
Explanation:
which type of radiation is blocked by wood?
Answers
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.
1 what do you understand by the term isotopes 2 why do I should talk of an element process identical chemical properties 3 name the isotopes of Hydrogen which does not have a Newton in it
Answers
Answer:
Isotopes of an element have same number of protons but different number of neutrons. Which means isotopes of an element have same atomic number but different mass number.
The chemical property of an element is determined by the number of electrons. And as all the isotopes have same number of electrons, they have same chemical properties.
Thus as isotopes of an element have same atomic number , they have same number of electrons and protons. As they have different mass number, the number of neutrons will be different. Hydrogen has three isotopes , [tex]^1_1\textrm{H}[/tex], [tex]^2_1\textrm{H}[/tex] and [tex]^3_1\textrm{H}[/tex]. Thus [tex]^1_1\textrm{H}[/tex] has no neutron.
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.
Answers
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 most likely an immediate consequence of drought?
Answers
Answer:
A lack of rain or the location is experiencing a dry season
Explanation:
What is the melting point of water? I need help
Answers
Answer:
You're answer is B.
Explanation:
I'm extremely sorry if that's wrong.
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
Answers
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:
CS₂Pls help! I'll give brainliest!
Draw a physical model that shows the reaction of zinc metal and hydrochloric acid (hydrogen chloride).
Zinc + Hydrochloric Acid → Zinc Chloride and Hydrogen Gas
Zn + 2HCl → ZnCl2 + H2
Be sure to label your model to clearly show how you are representing the atoms, how they are rearranged and that mass is conserved in the reaction.
I don't need it drawn, if you can just explain to me the reaction and what happens i can draw it. Please?
Answers
Answer:
sorry im not sure
Explanation:
a
How many atoms in 4.5 moles of carbon (C)?
Answers
Answer:
34 atoms
Explanation:
What gases do scientists think may have been in the early atmosphere? *
Answers
The direction of movement of the cold front shown in the figure at left is _____.
northeast
southeast
southwest
northwest
Answers
Answer:
Its southeast
Explanation:
Answer:
southeastt
Explanation:
9) A certain atom has 10 electrons, 14 neutrons, and 11 protons. Write the name of this element in isotope notation.
Answers
Answer:
²⁵₁₁Na⁺
Explanation:
Details about the atom:
Number of electrons = 10 electrons
Number of neutrons = 14 neutrons
Number of protons = 11 protons
The atomic number of an atom is a good indicator of the type of atom we have been given.
From the subatomic particles, the number of protons is the same as the atomic number.
Since the number of protons is 11, its atomic number will be 11.
The element with atomic number 11 is sodium, Na.
To write a complete notation, we also need the mass number;
Mass number = number of protons + number of neutrons
Mass number = 11 + 14 = 25
The charge on the atom:
Charge = Number of protons - number of electrons = 11 - 10 = 1+
The element in isotopic notation is given as;
²⁵₁₁Na⁺
CH3CH = CHCH3 *
A. alkane
B. alkene
C. alkyne
Answers
Answer:
B
Explanation:
when present
double bond the copound is alkene
Using the periodic table, choose the more reactive non-metal.
S or As
Answers
The most reactive non metal is called Astantine(As)
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.
Answers
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.
How many moles of salt will you be using in this recipe?
Answers
What causes potential energy to convert to kinetic energy?
Answers
Answer:
The system's potential energy is increased by gaining altitude. Then, gravity takes over, causing most of the potential energy to be converted into kinetic energy
Explanation:
Foods that are basic can be identified
by what taste?
astr
A. Salty
B. Sour
C. Bitter
D. Sweet
Answers
Answer:
sour!
Explanation:
Calculate the second volumes. 51.7 L at 27 C and 90.9 KPa to STP
Answers
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
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?
Answers
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
Compare The atomic number
of potassium is 19. How does
potassium-39 differ from
potassium-41?
Answers
Answer:
They are different ions of the same element.
Explanation:
on Quizlet
Help please! I'll give brainliest to the most helpful answer :)
Answers
Answer:
synthesis d
Explanation:
did that at my school
32. D
33. C
These are the answers
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
Answers
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 :)
Place these waves in order from shortest wavelength to longest.
sound waves, light waves, ocean waves
Answers
Ocean waves aren't technically related to this. Sound waves are shorter than
light waves, depending on the type of light wave.
in the food web above which organism has the least amount of energy available?
A. caterpillar
B. Squirrel
C. Fox
D. Shrubs
Answers
A gas has a pressure of 0.12 atm at 294 K. What is the new pressure at 273 K?
Answers
Answer:
P₂ = 0.11 atm
Explanation:
Given data:
Initial pressure = 0.12 atm
Initial temperature = 294 K
Final pressure = ?
Final temperature = 273 K
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
0.12 atm / 294 K = P₂/273 K
P₂ = 0.12 atm × 273 K / 294 K
P₂ = 32.76 atm. K /294 K
P₂ = 0.11 atm
