Answer:
1 mole =56 g
18.5 moles =56×18.5
=1036 moles Hope this helps you Stay happy and safe Do mark as brainliest ✌️Two liters of hydrogen gas are stored at a
pressure of 100 kPa. If the temperature
does not change, what will the volume
of the gas be when the pressure is
decreased to 25 kPa?
Answer:
the volume will expand
Explanation:
gas under pressure contracts, and expands with a lesser pressure
The volume of the hydrogen gas at 25 kPa is 8 Liters.
Explanation:
Given:
At constant temperature, 2 liters of hydrogen gas at 100kPa pressure.
To find:
The volume of the hydrogen gas at 25kPa.
Solution:
The initial pressure of the hydrogen gas =[tex]P_1=100 kPa[/tex]
The initial volume of the hydrogen gas at 100 kPa =[tex]V_1=2 L[/tex]
The final pressure of the hydrogen gas =[tex]P_2=25 kPa[/tex]
The final volume of the hydrogen gas at 25kPa = [tex]V_2=?[/tex]
Using Boyles law:
[tex]P_1V_1=P_2V_2\\100kPa\times 2 L=25 kPa\times V_2\\V_2=\frac{100 kPa\times 2L}{25 kPa}=8L[/tex]
The volume of the hydrogen gas at 25 kPa is 8 Liters.
Learn more about Boyles law here:
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what is a likely oxidation
state of Chlorine?
a)-1
b) 7
C) -7
d) +1
Answer: a) -1
Explanation:
what is a limitation of using a chemical formula, such as C6H12O6, to represent a compound?
A.The chemical formula does not show the types of elements that make up the compound.
B.The chemical formula does not show how the atoms are connected to one another.
C.The chemical formula does not show the number of atoms of each element in a molecule.
D.The chemical formula does not show the chemical symbols of the elements in the compound.
Answer:
B
The chemical formula does not show how the atoms are connected to one another
Answer:
b
Explanation:
edge 2020
Determine the mass of 6.43 moles of Barium.
Answer:
883.01261 grams
Explanation:
Answer:
Moles = Mass ÷ Ar
Mass = Ar × Moles
Mass = 137.327 × 6.43
Mass = 883.01g
Which refers to the measure of the amount of water vapor in the air?
Answer:
humidity
Explanation:
What is the relationship between the volume of a gas and the Kelvin temperature (at
constant pressure)?
They are the same.
They are inversely proportional to each other
They are directly proportional to each other.
They are independent of each other.
HELP QUICK The dichotomous key was created with questions about permanent
physical characteristics.Each question in the dichotomous key has only ____ answer choices. The answer choices can be answered only with_________.
Answer:
The dichotomous key was created with questions about permanent
physical characteristics.
Explanation:
Answer:
permanent, two, yes or no
Explanation:
Can someone please help me with a science question?????
Answer:
yes
Explanation:
pls help ill mark as brainliest
Q8. Na2CO3 Na2O + CO2
is this combustion, synthesis, single replacement, double replacement, or decomposition ?
Answer:
Decomposition
Explanation:
First, you have one compound, then they break up, or decompose, into two compounds.
How many atoms in 134 moles of an element B?
Answer:
8.06966961e+25
Explanation:
Atom = Mole / 6.0221415E+23
1 Mole = 6.0221415E+23 Atom
Answer:
8.06948e+25 atoms
Explanation:
mole = number of particles/avogadro number
number of atoms = mole × avogadro number
number or atoms = (134) x (6.022× 10²³) = 8.06948e+25 atoms
help plz this is part b to my last question
Answer:
% error Aluminum: 0.34%
% error Steel: 16.67%
% error Lead: 23.08%
Explanation: Given our observed values of specific heat, to find the % error, we must know the true values as well. % error can be defined as, % error = |observed value - true value | / true value.
Our given data to solve this problem is as follows:
Aluminum Specific Heat Observed Value: 0.9 (given), Aluminum Specific Heat True Value: 0.897 (research).
Steel Specific Heat Observed Value: 0.49 (given), Steel Specific Heat True Value: 0.42 (research).
Lead Specific Heat Observed Value: 0.16 (given), Lead Specific Heat True Value: 0.13 (research).
___________
Since we have all the information, just subtract the true value from the observed value, and divide by the true value.
Aluminum Specific Heat % error:
observed value - true value / true value →
0.9 - 0.897 / 0.897 = 0.003 / 0.897 = 1/299 ≈ 0.34 %
Steel Specific Heat % error:
observed value - true value / true value →
0.49 - 0.42 / 0.42 = 0.07 / 0.42 = 1/6 ≈ 16.67%
Lead Specific Heat % error:
observed value - true value / true value →
0.16 - 0.13 / 0.13 = 0.03 / 0.13 = 3/13 ≈ 23.08%
How many moles are there in 7.4 X 1023 molecules of AgNO3?
mL? PLEASEEE HELP
What is the answer
at what temperature does a solid turn into a liquid
Answer:
0°C
Hope this helps Do mark as brainliestAnswer:
a little over 0 degrease cel
Explanation:
Is krypton a stable element
Answer:it is a stable element
Explanation:because it has six stable isotopes
which of the data sets qualitative data?
Answer:
any data should work as long as you get the question right it should be all fine if you i had this question once and i different sums of data each or each way i did it.
Help me please
Chemical energy is a form of_______ energy
A. heat
B. kinetic
C. potential
D. electromagnetic
Answer:
potential
............
Answer:
Chemical energy is a form of potential energy.
How many cesium atoms are in 21.9 grams?
Which is an example of a neutral mutation? 1. one that causes abnormal human skin cells to reproduce and divide rapidly, producing a movie 2. one that increases the size of a seed pod, allowing the seeds inside to be spread and eventually grow 3. one that results in smooth plant leaves, while not changing the function of the leaves 4. one that brightens the feathers of a bird, making it easier for other animals to see it.
Answer:
its C) one that results in smooth plant leaves, while not changing the function of the leaves
Explanation:
Answer:
Person above me is right!
Explanation: its C :)
The gravitational attraction between two objects is determined by the mass of the two objects and the:
A. Distance between the objects
B. Weight of the objects
C. Diameter of the objects
D. Density of the objects
Answer:
A. Distance between the objects
Explanation:
The gravitational attraction between two objects is determined by the mass of the two objects and the distance between the two objects.
According to Newton's law of universal gravitation:
"the gravitational force of attraction between two bodies is directly proportional to the product of the their masses and inversely proportional to the square of the distance between them".
F = [tex]\frac{Gm_{1}m_{2} }{r^{2} }[/tex]
F is the gravitational attraction
G is the universal gravitation constant
m is the mass
r is the distance
We can see that the gravitational attraction depends on the mass of the bodies and the distance between them.
Calculate the number of moles of neon gas in 8.15 x 10^24 atoms of neon gas.
1.35 moles Ne
0.135 moles Ne
135 moles Ne
13.5 moles Ne
Answer:
13.5 moles of Ne
Explanation:
1 mole of any gas contains 6.02 x 10²³ atoms of gas
6.02 x 10²³ atoms of neon is equal to 1 mole of neon .
8.15 x 10²⁴ atoms of neon is equal to 1 x 8.15 x 10²⁴ / 6.02 x 10²³ moles
= 8.15 x 10²⁴ / 6.02 x 10²³ mole o neon
= 13.5 moles of Ne .
What large city in Texas will have its third day of rain?
Answer:
houston, texas
Explanation:
i hope this helps :)
How could measuring the melting point of a solid help decide whether it was a mixture or a compound?
Answer: It can't.
Explanation:
In most cases, the melting point alone will not enable you to identify a compound. Millions of solid organic compounds, and their melting points, are known. Perhaps 10,000 of these will have the same melting point as your unknown compound.
Hope this helps!
(b) Define, in terms of oxidation state, the Oxidizing agent
a substance which gains oxygen
a substance whis lose hydrogen
a substance which experiences a decrease in oxidation state
a substance which experiences an increase in oxidation state
Answer: a substance whis lose hydrogen
Explanation:
Calculate 6890/1230000 and conclude using the correct scientific figure.
Answer:
5.60162×10^−3
Find the midpoint of points A(-10,3) and B(-7,-4) graphically .
Answer: Here u go
Explanation:
5. An atom has 6 protons, 6
neutrons and 6 electrons.
Another atom has 6 protons,
7 neutrons and 6 electrons.
Are these two atoms the
SAME atom or DIFFERENT
atoms?
i need helppppp
Answer:
it is the same
Explanation:
the atom with 7 neutrons is the isotope of the atom of 6 neutrons. they share the same chemical behaviour but they differ in atomic masses and physical properties
According to Maslow's hierarchy of needs, the basic needs are what we call physiological or biological needs. The survival of the individual relies on these basic needs. Looking at it this way, before you can meet any of the needs going up the hierarchy, one needs to be healthy or at least functional optimally to even get started. All other needs are considered secondary until the basic needs have been me
Answer:
True
Explanation:
|ndeed, Psychologist Abraham Maslow's sought to describe hierarchy in which the average (or most) humans place their needs. In other words, he believes we as humans have basic needs which we long to satisfy.
On the ranking or hierarchy, according to Maslow the need humans satisfy first is their physiological need. Here's the full hierarchy:
Physiological Needs
↓
Safety Needs
↓
Love/Belonging Needs
↓
Esteem Needs
↓
Self-Actualization
(EASY!!) What is the name for this structure?
Answer:
ccc
Explanation:
yeah
Answer:
uhh I can't really tell- it looks like a lot of things
Explanation:
it kind of looks like a trapezoid or maybe a "gun" I haven't really seen a shape of this kind- so I'm going to say either one of those answers. sorry if I wasn't much help (◞‸◟ㆀ)
Can an Atom be broken down into a smaller substance? Yes or No Explain.
Answer:
Yes
Explanation:
A atom is made out of 3 elements, protons which are positive charges, electrons which are negative charges that swirl around the atom, and a neutron with a neutral charge. The nucleus of the atom is basically the center of the atom.
