Which of the following is not a physical property of a rock?
A. luster
B. electrical conductivity
C. melting point
D. density
Answer:
B
Explanation:
electrical conductivity of a rock cannot be determined by merely looking at the rock
Correct any mistakes in the electron configurations below.
Answer:
E.) 1s^22s^22p^23s^4p^4
Explanation:
Answer:
See explanation.
Explanation:
D. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d8;
Explanation: before filling 3d orbitals, 4s needs to be filled. Since s holds 2 electrons, take two from the 3d10.
E. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p3;
Explanation: after the 4s orbital, the 3d orbitals need to be filled. You do not fill the 4d orbitals until the 5s orbital is filled.
Here is a quick review of the order orbitals need to be filled in:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p;
s holds 2 electrons; p holds 6 electrons; d holds 10 electrons; f holds 14 electrons.
Question
Which two of these options does the transfer of light energy require?
A. Magnetic fields
B.Electric fields
C. Gravitational forces
D. Geometric figures
Answer: A,B
Explanation:
Answer: A. Magnetic fields
B. Electric fields
Explanation:
What is the correct order of these items from smallest to largest radius? Group of answer choices
Na+ < F- < O2-
Na+ < O2- < F-
O2- < F- < Na+
O2- < Na+ < F-
I'm assuming you're talking about atomic radius. It'd be the 2nd.
Fluoride has the smallest (group 17)
Oxygen has the 2nd smallest (group 16)
Sodium has the largest (group 1)
Sorry it took so long, didn't know it was multiple choice :)
Write the chemical formula for the following: silver cyanide
Answer:
AgCN
Explanation:
Ag+C=N
An object starts from rest and exhibits the motion represented by the graph. The object’s average velocity during the 3 second to 5 second time interval is approximately –
8.4 m/s
3.2 m/s
4.8 m/s
.0125 m/s
Answer:
8.4 m/s
Explanation:
Initial velocity of the object is 0 as it was at rest.
We need to find the object’s average velocity during the 3 second to 5 second.
We can see from the graph that from 3 s to 5 s, the graph is a straight line. If we take the slope we can find the average velocity during the 3 second to 5 second.
Displacement between 3 s to 5 s is :
D = 24.8 m - 8 m = 16.8 m
Time = 5 s - 3 s = 2 s
Now,
Average velocity,
[tex]v=\dfrac{\Delta y}{\Delta x}\\\\y=\dfrac{16.8\ m}{2\ m}\\\\y=8.4\ m[/tex]
So, the object’s average velocity during the 3 second to 5 second is 8.4 m/s.
What is the relationship between the kinetic energy of molecules in a solid and a liquid? Justify your response in two or
more complete sentences.
LEDE
Answer:
In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape
Answer:
In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape
Explanation:
If 10 milliliters of liquid has a mass of 70 grams, what is its density?
O 7 g/mL
70 g/mL
0.7 g/mL
700 g/mL
Answer:
The answer is 7 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 70 g
volume = 10 mL
We have
[tex]density = \frac{70}{10} \\ [/tex]
We have the final answer as
7 g/mLHope this helps you
kinetic energy is energy that an object possesses because of its
Answer:
Explanation:
Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. If an object has kinetic energy, then it is moving. Many students confuse kinetic energy with potential energy.
why sodium is active element...
Answer:
here is your answer
Explanation:
1. sodium sodium is very reactive metal
2. when it exposed in air it automatically form Na2O.
3. when when it put in water it reacts visoroustly and start burning on water.
( due to this it is called active element)
Is sugar (C12H22O11) an element or a compound?
Group of answer choices
Compound
No answer text provided.
No answer text provided.
Element
explain what you think what happen to rubber if too manyn cross limks are formed.
Answer:
The rubber becomes brittle and can break in your hand. The explanation for why this happens concerns cross-linking bonds. Ultra-violet light from the sun provides the polymer molecules with the activation energy they need to be able to form more cross-links with other chains.
Solution ,colloid ,or suspension
Answer:
colloid
Explanation:
i think she making meth in her basement
All cells share certain functions necessary for life. Which of the following is not a function performed by every cell?
Answer:
there is no following so there isnt a answer
Explanation:
how many minutes are in 9,040 ms
Answer:
0.15066667
I tried, hope this helps :)
Which student’s responses are correct?
Answer:j
Explanation:im not stupid??
Answer:
2
Explanation:
student 2 is correct because the number of protons determines what element an atom is, and the number of valence electrons shows how the atom bonds and its reactivity.
The Handbook of Chemistry and Physics lists the density of a certain liquid to be 0.7988 g/mL. Taylor experimentally finds this liquid to have a density of 0.7925 g/mL. What is his percent error?
Answer:
The answer is 0.79%Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual density = 0.7988 g/mL
error = 0.7988 - 0.7925 = 0.0063
So we have
[tex]P(\%) = \frac{0.0063}{0.7988} \times 100 \\ = 0.788683024...[/tex]
We have the final answer as
0.79 %Hope this helps you
Which of the aforement unique characteristics of earth do you like the most and why?
Answer:
The Earth rotates on its axis at a constant tilt.
Earths rotation on its axis at a constant tilt provides seasonal changes in the different part of the country. This resulted to the distribution of the heat of the sun from northern hemisphere and to southern hemisphere. Making areas with hot temperature may experience rainy season in a year. This will help production of crops or food supply and water supply available for living organism.
If the Earth's rotation is not tilted, then both the northern hemisphere and southern hemisphere will be covered with thick ice sheet. The equatorial region or near the equatorial region will experience tremendous warm temperature. Making our life on Earth not ideal for living.
Magnetic Field
Earth is protected by the magnetic from the dangerous radiation coming from the heat of the sun.
Water and oxygen
These two elements are essential for living organism in order to survive. The existence of waters proves that Earth temperature is conducive for living.
Each of the jars was heated 90°C each jar was placed on the counter and allowed to cool
Explain how an oil spill devastates marine life when animals get covered by the toxic sludge
Answer:
It poisons animals, it coats reefs, and damages ecosystems.
Explanation:
It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.
It is the same lines as the animals, our pollution and oil floods our environment and we start to die.
Sponsered by: STAF
Save the Animals Foundation
Hope this helps!
I was kidding about the sponsership.
Answer:It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.It is the same lines as the animals, our pollution and oil floods our environment and we start to die.
Explanation:
Three wax palm trees are kept at different humidity levels inside of a greenhouse for 12 weeks. One tree is left outside in normal conditions. The height of the tree is measured once a week. Which of the following is your controlled variable?
Compare and Contrast Iced Tea, Salad Dressing
Answer:
dressing is for salad and tea is a drink but the are both liquids and brown
Which of the following is a molecular formula?
MgCl₂
Al₂O₃
NO₂
CaO
Answer:
The molecular formula of a compound may be the empirical formula, or it may be a multiple of the empirical formula. For example, the molecular formula of butene, C4H8, shows that each freely existing molecule of butene contains four atoms of carbon and eight atoms of hydrogen. Its empirical formula is CH2.
Explanation:
In part of which layer does heat flow by convection?
I think is inner core but I am not sure about it
Answer:
the mantle because it's just built different
Calculate the density of a material that has a mass of 52.457 g and a volume of 13.5 cm3.
Answer:
3.8857037037g per cm3
Explanation:
52.357g/13.5 cm3 = 3.8857037037
Round if needed
What volume is occupied by 0.34 moles of Helium gas?
Answer:
I will assume that you mean
STP (Standard Temperature and Pressure)
21
3
≈
7 L
Explanation:
Since we know that
1 mole
of an ideal gas occupies
22.4 L
at
STP
then can establish the following relationships:
22.4 L
1 mole
or
1 mole
22.4 L
Knowing that, we can solve for the volume occupied by the helium gas,
0.35
mole
1
⋅
22.4 L
1
mole
=
7.84 L
as
7.84 L
−
−
−
−
−
The answer makes sense because if
1 mole
occupies
22.4 L
, then
0.35 moles
(roughly a third of the moles) will occupy a third of
22.4 L
(
if we round down 22.4 L to 21 L
)
−
−
−
21
3
≈
7 L
The volume occupied by 0.34 moles of Helium Gas is 7.62 L.
What is a noble gas ?Any gas from the group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates. — called also inert gas.
They have properties tending to an ideal gas.
It is asked that what volume will be occupied by 0.34 moles Helium Gas
The ideal gas equation is written as
PV = nRT
At STP , T = 273 K
P= 1atm
R = 0.0821 L(atm) mol⁻¹K⁻¹
Substituting the values
1 * V = 0.34 * 0.0821 * 273
V = 7.62 L
Therefore the volume occupied by 0.34 moles of Helium Gas is 7.62 L.
To know more about Noble Gas
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pls help its the last question!!!!!!
i need some help its due soon
Answer: it would be B
What human activity constitutes to air pollution?
A) construction
B) reforestation
C)habitats restoration
D)dam development
Answer:
The answer is A. Construction. The production of raw materials for construction in factories is harmful for the environment due to CO2 emissions. The chemicals used in construction and the diesel used by construction vehicles are also harmful to the environment.
Explanation:
In an ecosystem , human activity which constitutes to air pollution is construction.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems.
Learn more about ecosystem,here:
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Directions: Use the words in the word box to complete the following sentences.
acceleration
gravity
counteract
resistance
balanced
force
When the forces acting on an object are _______________ , there is no change in the object's motion.
A _________________ acting on a resting object can cause the object to move.
On Earth, __________________ pulls all objects toward the ground.
When a force acts in the opposite direction of another force, the forces ______________ each other.
More than one force acting on a falling object can reduce its downward ____________________.
Air _____________________ is caused by molecules of air pushing against a moving object.
Explanation:
When the forces acting on an object are balanced , there is no change in the object's motion.
A force acting on a resting object can cause the object to move.
On Earth, gravity pulls all objects toward the ground.
When a force acts in the opposite direction of another force, the forces counteract each other.
More than one force acting on a falling object can reduce its downward acceleration
Air resistance is caused by molecules of air pushing against a moving object