Answer: This law states that the volume and temperature of a gas have a direct relationship: As temperature increases, volume increases, when pressure is held constant. Heating a gas increases the kinetic energy of the particles, causing the gas to expand
Explanation:
According to this law, a gas's volume and temperature are directly correlated: When pressure is held constant, volume rises as temperature rises. The kinetic energy of the particles in a gas increases when it is heated, which causes the gas to expand.
What rules apply to gases?According to Boyle's Law, when the temperature and mass are both constant, the volume of a given volume of gas sustained at a constant temperature varies inversely with the applied pressure.
The quantity of gas particles, the volume of the container, and the temperature of the gas all affect the pressure of a gas that is confined. The pressure will rise as the amount of gas particles in a container increases. The pressure will rise as a container's volume increases.
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The units of a formula mass are
a. amu
b. micrograms
c. moles
d. grams
Answer:
the units of a formula mass are amu.
How did humans create cow breeds that survive well in cold weather?
Select one:
O
They identified cows that did well in cold weather and mated them.
O
They mated cows with sheep that had very thick wool.
O
They mated cows with caribou that tolerated the cold well.
O
They identified cows that did well in hot weather and mated them
Answer: They identified cows that did well in cold weather and mated them. This is known as selective breeding. All the other answers either cannot work as cross-species breeds generally don't work, or they target cows that survive well in hot weather.
serup is which solution
Answer:
dilute solution . . . . . . .
Explanation:
. .
Answer:
dilute soloution
Explanation:
dilute soloution as it dissolves
Which of these are an atom's valence electrons?
Answer:
The Outer-most Electron shell contains the valence electrons.
Bonus Info:
Valence Electrons are used by atoms to make ionic bonds.
Answer:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
Explanation:
ur welcome
i was doing this in school and i watched a video
Which of the following would increase the intensity of the tornado?
a. decrease in wind speed
b. decrease in condensation
c. increased rate of evaporation
d. increase of cold air
what is ideal gas constant?? g0ogle doesnt got any good answerss
Answer:
An ideal gas is a gas with particular characteristics.
Explanation:
The particles have no volume All collisions between particles are elastic collisions and lose no kinetic energy The particles neither attract each other nor repel They have random movementIdeal gases are hypothetical which means that they do not exist in their true form.
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Temperature of boiling water cannot be measured by a
_____________ thermometer.
Answer:
Cannot be measured by pyrometer.
Explanation:
This is because a pyrometer measures temperatures for very hot bodies such as the sun.
Answer:
Clinical
Explanation:
Temperature of boiling water cannot be measured by a Clinical thermometer The reason behind this is that the range of clinical thermometer varies between only 35° C to 42° C.
What occurs during replication?
O A protein is formed from information in messenger RNA.
A messenger RNA strand is made from DNA.
O A copy of DNA is made from existing DNA.
A copy of DNA is transferred from one organism to another.
Answer:
A
Explanation:
Hopefully this helps
Answer:
A copy of DNA is made from existing DNA.
Explanation:
Just did the quiz
How many atoms are in HCOOH₂?
Answer:
11 atoms I think
Explanation:
Answer: 3
Explanation:
I took the test!!
what's the molar mass of Li3p
Answer:
51.79g Li₃P.
Explanation:
Li has a molar mass of 6.94 g (since there are 3, you multiply it 3 times) and P has a molar mass of 30.97 g. 6.94(3) + 30.97 = 51.79g.
What is the name given to the group 0 elements
Answer:
the noble gases
If the ball is at rest on the soccer field and the four forces shown are applied at the same time, the ball will
А.
move to the left.
B. stay in the same position.
c. accelerate in the direction of the smallest force.
D. resist any change in movement.
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will: A. move to the left.
Given the following data:
Upward force = 50 Newton.Downward force = 50 Newton.Rightward force = 30 Newton.Leftward force = 40 Newton.A net force can be defined as the vector sum of all the forces acting on an object.
Hence, net force is the sum of all forces acting simultaneously on an object.
To determine the direction in which the ball would move if the four forces shown are applied at the same time:
For the downward and upward force:
[tex]Net\;force = 50-50\\\\Net\;force = 0\;Newton[/tex]
For the rightward and leftward force:
[tex]Net\;force = 40-30\\\\Net\;force = 10\;Newton[/tex]
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will move to the left.
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define a warm front in your own words
Answer:
type of front formed when a warm air mass pushes a cold air mass, forcing the warm air to slide over the cold air.
During the formation of ammonia, what mass of Hydrogen gas would be required to react completely with 42g of nitrogen gas?
Answer:
9 grams
Explanation:
Hope it can help you.....
how is wind energy captured?
where is wind energy found?
how is water energy captured?
where is water energy found?
plz use the passage i put. plz and thank you!!!!!
. How do metals and non-metals
Which two properties of metal enable us to use metal as electric wire
Answer:
it's ductility and it's conductivity
Explanation:
3. Which of the following is an example of a polyatomic ion?
a. NO
b. OP-
C. CI
d. Ca²+
Answer:D
Explanation:polyatomic means more then one and it have more then 1 positive ion
Elements in group 17 want to lose seven valence electrons and elements in group 1 want to gain seven valence electrons to become stable ions.
The number placed in front of a compound to balance a chemical reaction is called?
Answer:
coefficients
Explanation:
good luck
PLEASE HELP !!
Use the diagram below to answer the following questions.
PLEASE HELP
E TE
Figure B
In Figure B, which region contains the noble gas family of elements?
ОА
OD
ОС
OB
Noble gas located in the region D
Further explanationNoble gas are located in group 18 in the periodic table consisting of helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), have a stable electron configuration where the valence electrons are 8(full outer shell of electrons), so it is very hard to react because of its stability
If we look at the periodic system of the elements, the noble gases are on the far right, so that in Figure 8 it is located in area D
And the other region :
A : alkali elements(group 1),
B : alkaline earth elements(group 2)
C : halogen elements(group 17)
An object has a density of 1.4 g/cm . It is slowly lowered into a graduated cylinder whose water level was 65 mL. When the object is completely submerged the water level rises to 90 mL. What is the mass of the object?
Answer:
Explanation:
Weight
A measure of the force of gravity on an object
Mass
The measurement of how much matter an object contains
Volume
The amount of space that matter occupies
Density
The physical property that relates the mass and volume of an object or material
Unlike weight, mass doesn't change with location, even when the force of gravity on an object changes
Why do scientists prefer to describe its matter by its mass rather than its weight?
International System of Units
What system of units do scientists use to measure the properties of matter?
Liter, milliliter, cubic centimeter
3 common units of volume
Volume= length•width•height
Volume formula
Sand and feathers have different densities
Why does a kg of sand take up much less space than a kg of feathers?
Density=mass/volume
Density formula
Objects with densities greater than water will sink and objects with densities less than water will float. The density of wood is less than water (1 g/cm3) and the density of iron is greater than water (1 g/cm3)
If you drop a block of iron and block of wood into water, the iron sinks and the wood floats. What can you conclude about the density of iron and wood compared to the density of water?
V=2,400 cm3
A box has a length of 25 cm, a width of 8 cm, and a height of 12 cm. What is its volume?
D= 13.5 g/cm3
A sample of metal has a mass of 94.5 g and a volume of 7 cm3. What is its density?
Mass= density•volume
Mass formula
M= 234.26 g
Corn oil has a density of 6.89 g/cm3. What is the mass of 34.0 cm3 of corn oil?
Yes. No. The pull of gravity is different on the moon.
A solid has a mass of 180. Would the solid have a mass of 180 g on the moon? Would it have the same weight on Earth as on the moon? Explain.
No, because only the mass and volume will change
Will every solid with the same dimensions have the same density?
Grams and kilograms
Common units for mass
Grams per cubic centimeter or grams per cubic milliliter
Common units for density
V= 20 ml
D= 0.75 g/cm3
George put 25 ml of water into a graduated cylinder. After adding a solid object, the water level in the cylinder rose to 45 ml. What is the volume of the object? The object George is examining has a mass of 15 grams. What is the density of the object?
How many molecules of H2O are in 8.54 moles of H2O?
Select one:
a. 5.14 * 10^24 molecules H2O
b. 2.86 * 10^23 molecules H2O
c. 6.02 * 10^23 molecules H2O
d. 5.14 * 10^23 molecules H2O
Answer:
[tex]\boxed {\boxed {\sf A. \ About \ 5.14 *10^{24} \ molecules \ H_2O}}[/tex]
Explanation:
To convert from moles to units, we must use Avogadro's Number: 6.022 * 10²³
This tells us the number of units (molecules of water in this problem) in 1 mole of a substance (water). We can use it as a ratio or fraction.
[tex]\frac{6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2 O}[/tex]
Now, we can multiply this fraction by the moles of water (8.54) given.
[tex]8.54 \ mol \ H_2O*\frac{6.022 *10^{23}\ molecules \ H_2O}{1 \ mol \ H_2 O}[/tex]
When we multiply, the moles of water will cancel out.
[tex]8.54 *\frac{6.022 \ molecules \ H_2O}{1 \ }[/tex]
Since the fraction has a 1 as a denominator, we can remove it. The problem will be a simple multiplication problem.
[tex]8.54*6.022 \ molecules \ H_2O[/tex]
[tex]5.142788*10^{24} \ molecules \ H_2O[/tex]
The original measurement of 8.54 has 3 significant figures (8, 5, and 4). Therefore, we must round our answer to 3 sig figs, which is the hundredth place in this case.
The 2 in the thousandth place tells us to leave the 4 in the hundredth place.
[tex]5.14 *10^{24} \ molecules \ H_2 O[/tex]
There are about 5.14*10²⁴ molecules of water in 8.54 moles.
Answer:
5.14 x 10^24 molecules of H2O.
Explanation:
just took the test
What physical property can be used to distinguish between a 1 cm cube of copper
and a 1 cm cube of sugar?
Select one:
a size
b. lustre
C. cost
d state
State physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar. Hence, option D is correct.
What is physical property?A property (such as colour, hardness, boiling point) of the matter is not involved in its manifestation of a chemical change.
Physical properties are those general properties you notice most readily about a substance, such as its size, state of matter (solid, liquid, or gas), colour, mass, density and strength.
Values for physical properties can be determined by tests that don't alter the substance being tested.
Hence, state physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar.
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Which of the following reactants will generate products with a solution of phosphoric acid?
a
Al(s)
b
Cu(s)
c
Au(s)
d
Ag(s)
Answer:
A. Al(s)
Explanation:
Describe each of the 3 main
domains used to classify living
things.
Answer:
Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs (rRNA), the cell's membrane lipid structure, and its sensitivity to antibiotics. 3. The three domains are the Archaea, the Bacteria, and the Eukarya.
Explanation:
How many moles of O, will occupy 1.00 L at a temper-
ature of -118°C and a pressure of 49.77 atm?
Moles of O₂ = 3.92
Further explanationGiven
V=1 L
T=-118 °C + 273 = 155 K
P = 49.77 atm
Required
moles of O₂
Solution
the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
Input the value :
n= PV/RT
[tex]\tt n=\dfrac{49.77~atm\times 1~L}{0.082\times 155}=3.92~moles[/tex]
The atmospheric gases in the thermoaphere are heated___.
Answer:
Directly by the sun
Please select the word from the list that best fits the definition
Measured in grams of solute per gram of solution
concentration
solubility
Answer:
Solubility
Explanation:
Solubility units that incorporate units of solution include grams of solute per 100 grams of solution or grams of solute per liter of solution. Another way to express solubility is in moles of solute per liter of solution; this ratio is called "molarity."
What is the molar mass of phosphorus pentachloride and uranium hexafluoride?
Answer:
PCl₅ = 208.22g/mol. UF₆ = 352.03g/mol.
Explanation:
Find the atomic mass of each element–and if there's a subscript (you multiply the atomic mass by that much). P= 30.97g, Cl= 35.45g; 30.97+35.45(5) = 208.22g [same idea with UF₆]
As shown by the periodic table, why do the elements potassium and sodium have similar chemical properties?