I need help pleaseee!!!!!!!! Fast
Answer:
C.) 1700 Pa
Explanation:
300 k - 0.3 m^3 = 17000
Air pressure is greatest near the surface of the Earth in the _______.
Question 7 options:
Thermosphere
Mesosphere
Troposhere
Exosphere
Imagine that you traveled to the Moon for a vacation and discovered that your weight is different there. How would your weight be different on the Moon than on Earth? Why would it be different? Does this mean that you ""lost weight"" and need to buy new clothes that fit? Why or why not?
Answer
No you did not lose weight.
Explanation:
Weight is the force acting on an object, Gravity is a force on earth which does not apply to the moon so your weight may change depending in where you are but your mass will stay the same because mass measures the matter of an object ITSELF! Have a nice day....
Answer:
I would take my weight on Earth and divide it by 6. I'd weigh less because the gravitational pull on the Moon is less, and, weight is the measure of gravitational pull. I wouldn't "loose weight" because I'd weigh the same on Earth as I did the day I left (give or take a few pounds).
Explanation:
How many elements are in the compound calcium carbonate?
Answer: Calcium carbonate contains 3 elements, calcium, carbon, and oxygen. The formula is CaCO3.
Explanation:
Answer:
There are 3 elements.
Explanation:
The formula for calcium carbonate is CaCO3. The elements in it are Calcium, Carbon, and Oxygen.
1
Friction is a force that resists the movement of objects in contact with one another.
This force acts in a specific vector to the direction of motion. Which way is it?
A. Opposite
B. The same
C. The direction of push
D. The direction of pull
Answer:
A
Explanation:
Friction is a force that opposes motion.
1.What is another term for the 24 hour clock?
Answer:
military time
Explanation:
military time
Think of a time you might have used the scientific method without even realizing it.
Answer:
when i exist
Explanation:
Which of these is caused by bacteria? A) tuberculosis B) influenza C) the common cold D) chicken pox
Answer:
The answer is A Tuberculosis
at a fixed temperature and pressure, a cylinder contains equal volumes of o2 and an unknown gas, weighing 20.0 g and 17.5 g respectively. what is the identity of the unknown gas?
At a fixed temperature and pressure, a cylinder contains equal volumes of O2 and an unknown gas. The identity of the unknown gas CO.
The number of moles of a given substance is calculated by dividing the mass by the molar mass.
The number of moles of O₂ = [tex]\mathbf{=\dfrac{20.0 \ g}{32 \ g/mol}}[/tex]
= 0.625 moles.
Based on the given assumption, at fixed temperature and pressure;
Let assume that the number of moles of the unknown gas is = 0.625 molesThe molar mass of the unknown gas can be estimated as:
[tex]\mathbf{= \dfrac{mass}{number \ of \ moles}}[/tex]
[tex]\mathbf{= \dfrac{17.5 \ g}{0.625 \ moles}}[/tex]
= 28 g/mol
Therefore, we can conclude that the unknown gas is CO.
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Question
A student measures the distance between points A and B. The student uses a stopwatch to measure the time taken to travel from point A
to point B. Which equation helps the student to calculate the speed at which an item travels?
Question
O Speed =
Distance
Time
Questio
O Speed =
Time
Distance
Questio
O Speed = Distance x Time
O Speed = Distance + Time
Answer:
Speed = Distance × Time
A× B
2. What is the shape of the 3p atomic orbital?
A superficial dermal erythema that is classified as an exanthem is more commonly known as a(n) __________
Answer:
ITS CALLED RASH
Explanation:
which substance cannot be decomposed by a chemical change
Answer:
Nonbiodegradable substance
is the moon bigger than neptune
Answer:
Neptune is bigger than the moon
Explanation:
The circumference of the moon is 6,783.5 miles
The circumference of Neptune is 96,129 miles
This means neptunes circumference is about 14 times the size of the moons
A student in lab is determining the density of beads of an unknown metal using displacement by volume. The beads are added to an empty beaker (82.0 g) and with the metal beads it weighs 205.5 g. The beads are poured out into a graduated cylinder containing 60.9 mL of water and the water rises to 70.8 mL mark. What is the density of the metal beads in g/mL?
a. 0.34
b. 0.08
c. 12.47
d. 2.90
e. 1.74
The density of the metal beads is 12.47 g/mL (option c).
1. Determine the mass of the metal beads:
Mass of beaker + metal beads = 205.5 g
Mass of empty beaker = 82.0 g
Mass of metal beads = (Mass of beaker + metal beads) - (Mass of empty beaker)
= 205.5 g - 82.0 g
= 123.5 g
2. Determine the volume of water displaced by the metal beads:
Initial volume of water in the graduated cylinder = 60.9 mL
Final volume of water in the graduated cylinder = 70.8 mL
Volume of water displaced = Final volume - Initial volume
= 70.8 mL - 60.9 mL
= 9.9 mL
3. Calculate the density of the metal beads:
Density = Mass / Volume
Density = 123.5 g / 9.9 mL
Density = 12.47 g/mL
Therefore, the density of the metal beads is 12.47 g/mL (option c).
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what is the molar mass of dimethylglyoxime, c4h8n2o2?
Explanation:
The molar mass of a compound can be calculated by finding the molar of the individual atoms that combine to make the compound.
Molar mass of compound =
∑ (molar mass of element × number of atoms of the element)
∴ Molar mass of dimethylglyoxime
= 4C + 8H + 2N + 2O
= [(4 × 12.011) + (8 × 1.0080) + (2 × 14.007) + (2 × 15.999)] g/mol
= 116.12 g/mol
∴ the molar mass of dimethylglyoxime = 116.12 g/molwhich element has a larger atomic radius than sulfur?
a model of an atom shows eight electrons in rings that represent different energy levels. how many electrons are in each energy level?
Answer:
1. four in the first energy level, four in the second energy level
2. eight in the first energy level, zero in the second energy level
3. zero in the first energy level, eight in the second energy level
4. two in the first energy level, six in the second energy level *
Explanation:
1. four in the first energy level, four in the second energy level
2. eight in the first energy level, zero in the second energy level
3. zero in the first energy level, eight in the second energy level
4. two in the first energy level, six in the second energy level *
tại sao lại có cầu vồng
Answer:
because of the reflection that the Sun makes on the water after it rained.
bởi vì sự phản chiếu mà mặt trời tạo ra trên mặt nước sau khi trời mưa
Explanation:
convert using metric and U.S. conversion factor. Convert 0.672 ft to mm
Answer:
204.8256
Explanation:
Do you think acid rain makes new substances? (CER)
Not all chemical reactions are spectacular. They do not always involve substances that you think of as chemicals like the ones in the lab or in acid rain. ... When molecules of sulfenic acid get to your eyes, they can react with the water in your eyes to produce a new substance, a form of sulfuric acid.
PLEASE HELPP!
True or False: Hydrogen is an alkali metal.
Answer: falso
Explanation:
Phosphorus-32 has a half-life of 14.3 years. How many grams remain after 57.2 years if you have
4.0 g of the isotope at the beginning?
Answer:
29.3 years to live
Explanation:
Phosephurus loses 32 years at his life -32
then he gains 14.3 years back and another 57.2 years
totaling 29.3 years he will live
why are metals not used on transistors and integrated circuits
Answer:
The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.
when washing tableware the water temperature should be:
electronegativities of the elements be, mg, ca, and sr follow a specific trend within their group. based on this trend, the atoms of which element will have the least attraction for an electron?
Based on the trend of electronegativities values of the elements Be, Mg, Ca, and, Sr within their group (increasing from bottom to top), the atoms of the element Sr will have the least attraction for an electron.
We need to remember that electronegativity indicates the affinity or attraction of an element for an electron. Hence, the higher the electronegativity, the higher the attraction of that element for an electron.
The values of electronegativities of the given elements are the following:
Be = 1.57
Mg = 1.31
Ca = 1.0
Sr = 0.95
We can see that the increasing trend of electronegativities in this group is from the bottom to the top, having the Sr with the lowest electronegativity value and the Be with the highest.
This trend is related to atomic size, the larger the atomic size, the lower the electronegativity because the electron in the outermost shell will feel less attraction towards the nucleus of an atom. In a group of the periodic table, the size of an atom will increase from top to bottom.
Therefore, according to the said above, the atoms of the Sr will have the least attraction for an electron (it has the lower electronegativity value).
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Which is not an example of a compound?
Ingnore the top PLEASE HELPP
Answer:
The 3rd answer or NCI is the correct answer
Explanation:
Hope this helps:)
Answer:
the 1st one
Explanation:
The method of converting from an
amount of one substance to an
amount of another substance using a
balanced chemical equation.
Explanation:
one substance
+one substance=balanced of chemical equation
Ned help with this question
Someone pls help me I will make you brain
Answer:
A
Explanation:
Answer:
It's the first one I think "it absorbs the other greenhouse gases and becomes more potent