Answer:
Subscripts
Explanation:
Example:
H2O
2 is the subscript and does not change
why don't you need to know the total distance the soccer player travel to determine her displacement.
Answer:
displacement is how far away she is from her starting point. distance includes every time she turned in a different direction, but displacement is just a straight line from her starting point to her ending point.
Explanation:
:)
write the Delton atomic theory
What is the molecular formula of manganese dioxide ?
Answer:
MnO₂
Explanation:
Hope this helps you!
PLS PLS PLS PLS HELP IM STRUGGLING
Which of the tests above would provide the most useful information to determine whether the sample is a pure substance or a mixture?
A. 4 only
B. 1 and 4
C. 1,2, and 3
D. 1 only
Answer:
A. 4 only
Explanation:
One of the tests for purity is by determining the melting point of a substance. A pure substance has a sharp meting point.
If the solid in question is a pure solid, when it is heated, it will exhibit a sharp melting point. Mixtures however melt over a range of temperatures due to the presence of impurities in the solid.
please help me thanks :D
Answer:
I got u g
Explanation
its tru i believe
Please help!
Using the table, complete the following statements.
SPECIFIC HEATS
Substance Specific Heat (cal/g·°C)
water 1.0
ice 0.5
glass 0.16
silver 0.06
One gram of glass will rise 20° C when (what) calories of heat are applied.
Ten grams of ice will require (what) calories to raise its temperature 1° C.
Options to both questions:
5.
0.016.
2.
50.
3.2.
1.6.
0.32.
0.5.
32
Answer:
One gram of glass will rise 20*C when 3.2 Calories of heat are applied
Ten grams of ice will require 5 Calories to raise its temperature 1*C.
When 3.2 Calories of heat are applied to one gram of glass, the temperature rises by 20*C. Ten grams of ice requires 5 Calories to rise by 1*C.
What is Specific Heat?The amount of heat needed to raise a substance's temperature by one degree Celsius in one gram is also known as specific heat. Typically, calories or joules per gram per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gram per degree Celsius. The notion of specific heat was developed by the Scottish scientist Joseph Black in the 18th century as a result of his discovery that equal masses of different substances required varying quantities of heat to raise them through the same temperature range.To learn more about Specific Heat, refer to:
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what do u mean by H² and 2H
Answer:
H2 is molecular hydrogen.it is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond. 2H denotes two moles of elemental hydrogen.it should be noted that elemental hydrogen is not bonded to anything.
Explanation:
H2 (2 being lower to H ) represents a single molecule of hydrogen .It is in the stable state and do not react .
2H represents two atoms of hydrogen .It is in the unstable state and do react immediately ( with oxygen as in water to be stable ) .
Lithium (Li): 1s 2sB
A=
B=
Answer:
A = 2
B = 1
Explanation:
The atomic number of lithium is 3.
Its atomic mass is 7 amu.
It is present in group group 1.
It has one valance electron.
Lithium is alkali metal it form salts.
It is silvery soft metal. It has lowest density as compared to all other metals.
It react vigorously with water.
It is used in rechargeable batteries which are used in camera, mobile, laptops etc.
The electronic configuration of Li:
Li₃ = 1s² 2s¹
Thus,
A = 2
B = 1
How many moles of Na+ ions are in 100.mL of 0.100M Na3PO4(aq)?
A) 0.300 mol
B) 0.100 mol
C) 0.0300 mol
D) 0.0100 mol
Answer:
The answer is C) 0.0300 mol
Explanation:
First you need to get the total amount of moles is dissolved in the solution. This can be obtained doing the following:
Molarity = moles of solute / liters of solution
moles of solute = molarity x liters of solution
First, the volume has to be in liters, then :
100. ml x (1 L / 1000 mL) = 0.100 L
(We then substitute)
moles of solute = 0.100 mol/L x 0.1 L = 0.0100 mol of solute (In this case Na3PO4)
Having the moles of the solute, we now need to find how many moles of Na+ ions are there.
We need the conversion factor of 3 Na+ moles per 1 mole of Na3PO4
We then find the amount of moles doing as follows:
0.0100 mol Na3PO4 x (3 mol Na+ / 1 mol Na3PO4) = 0.0300 mol Na+.
The number of moles of [tex]Na^+[/tex] are 0.0300 and further calculation can be defined as follows:
Given that:
Molarity of [tex]Na_3PO_4[/tex] = 0.100 M
Volume of a solution = 100. mL
To find:
Moles of [tex]Na^+[/tex] ions
Formula used to calculate the number of moles when molarity is given is:
[tex]\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (mL)}}[/tex]
Put the values in the above formula:
[tex]0.100M=\frac{\text{Moles of }Na_3PO_4\times 1000}{100 mL}\\\\\text{Moles of }Na_3PO_4=\frac{0.100\times 100}{1000}\\\\\text{Moles of }Na_3PO_4=0.01 moles[/tex]
Since, 1 mole of [tex]Na_3PO_4[/tex] contains 3 moles of [tex]Na^+[/tex] and 1 mole of [tex]PO_4^{3-}[/tex] ions.
Moles of [tex]Na^+[/tex] ions = [tex](3\times 0.0100)=0.0300mol[/tex]
So, the required moles of [tex]Na^+[/tex] ions are 0.0300 moles.
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How many atoms below
i cant see anything in the picture, its just black
New account if u added my account antonio716 this my new account new friends
how did u even find me again i wanna see if people are
me with a wey some one made
Answer:ok
Explanation:
Can someone please help me answer that question
Answer:
Mk but in just a minute I gotta go for a sec and do my homework.
Explanation:
Perform each of the following unit conversions using the conversion factors given below:
1.000 atm = 760.0 mmHg = 101.325 kPa
1.429 atm =
mmHg
9,361 Pa =
kPa =
mmHg
725 mmHg =
atm =
kPa
1. 1086.04 mmHg
2.70.213 mmHg
3. 95.954 kPa
Further explanationPressure (P) is the force applied per unit area
Can be formulated :
[tex]\tt P=\dfrac{F}{A}[/tex]
P = pressure (SI=Pascal(Pa))
F= force applied (N)
A=area(m²)
The unit of pressure can be expressed in atm, mmHg, or Pascal
[tex]\tt 1.\dfrac{1.429}{1}\times 760=1086.04~mmHg[/tex]
[tex]\tt 2)~9,361~Pa=9.361~kPa=\dfrac{9.361}{101.325}\times 760=70.213~mmHg[/tex]
[tex]\tt 3)\dfrac{725}{760}\times 1=0.947~atm=\dfrac{0.947}{1}\times 101.325=95.954~kPa[/tex]
Answer: (what's in bold is the answer! straight off of edge!)
1.429 atm = 1,086 mmHg
9,361 Pa = 9.361
kPa = 70.21 mmHg
725 mmHg = 0.954
atm = 96.26 ⇒ 96.7 kPa
Use the following diagram to answer questions 3-6.
According to the diagram, which rock layer is probably the
oldest?
O A. Layer A
NA
O B. Layer
C. Layer
D. Layer D
o
US
Answer:
layer c
Explanation:
because its furtherest under ground
im about to die, please help
Answer:
Why u finna die what wrong
Explanation:
Wanna help
Answer:
oh no i tried to answer your problem and now im going to die
Explanation:
Describe the levels of organization of a complex, multicellur organism such as a mouse starting with the cell
The level of organization of a complex, multicellular organism such as a mouse, starting with the cell, is. The cellular level, the tissue level, the organ level, the organ system, and lastly the organism.
What is level or organization?The level of organization of the body is the organization of the body with the smallest unit like the cell. As we know, the smallest unit of life is the cell. So the organization of energy in living organisms starts with a cell.
The cellular level is the cells, the cell combine to form tissue and many tissues join together to form an organ. Many organs join together to create an organ system, and the organ system establishes an organism.
Thus, starting with the cell, the organization of a complex, multicellular creature like a mouse is. cell level, tissue level, organ level, the organ system, and finally organism level.
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Which type of basin forms at transform boundaries?
rift
wedge
arc
strike-slip
In an ecosystem, strike-slip type of basin are formed at transform boundaries.
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 system 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.
Learn more about ecosystem,here:
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At about what temperature does the sample change phase? Justify your
answer based on the cooling curve shown above.
A student states, “When the alcohol sample was at a temperature of 500 K, all the particles were moving faster than any of the particles were moving at
400 K" Do you agree or disagree with this student's statement? Justify your
answer.
Answer:
This is very true
Explanation:
The kinetic energy in a system is directly proportional to the temperature of a system.
The higher the temperature, the faster the particles of a system will move. From the kinetic molecular theory, we see that the temperature of a system is a measure of the average kinetic energy of the molecules.
In chemical kinetics, as the temperature increases, the kinetic energy of the system also increases.
distinguish(solid,liquid,gas)
Answer:
Explanation:
A solid, at a given temperature, has a definite volume
and shape which may be affected by changes in
temperature. Solids usually increase slightly in size
when heated (expansion) and usually
decrease in size if cooled (contraction).A liquid, at a given temperature, has a
fixed volume and will take up the shape of any
container into which it is poured. Like a solid, a
liquid’s volume is slightly affected by changes in
temperature.
A gas, at a given temperature, has neither a definite
shape nor a definite volume. It will take up the shape
of any container into which it is placed and will
spread out evenly within it. Unlike those of solids
and liquids, the volumes of gases are affected quite
markedly by changes in temperature.
Can somebody please help grades are due at the end of the week please please
Answer:
where's the document
Explanation:
What statement correctly describes gravity
Answer:
gravitation
Explanation:
Answer:
What statement ?
Explanation:
How is velocity defined?
O speed
O speed in a particular direction
O direction
O changing direction
Answer:
B Speed in a particular direction
the table shows the types of elements that form two componds. which of the following statements is true about how the bonding occurred to create the two compounds
Electrons are shared in compound X and transferred in compound Y.
Further explanation1. ionic bonding
Bonding that occurs due to electron transfer. Can occur in metal and non-metal atoms. To get stability, atoms release or bind electrons to get stable electron regulation from noble gases
2. covalent bonding
Bonding that occurs due to shared use of electron pairs
The two bound atoms contribute their electrons to produce bonds
Generally occurs in non-metallic elements
So compound X = covalent bond (metal with metal) and compound Y= ionic bond(metal with non metal)
Compound X : shared electronCompund Y : transferred electronIdentify ALL the possible mol ratio from
this balanced equation:
Answer:
[tex]\frac{1 mole of N_{2} }{3 moles of H_{2} }[/tex]
Explanation:
The equation of the reaction:
Nitrogen gas N₂ reacts with Hydrogen as H₂ to produce ammonia NH₃;
N₂ + H₂ → NH₃
The balanced equation is ;
N₂ + 3H₂ → 2NH₃
The mole ratio is the ratio of the coefficients of the combining reactants;
1 mole of N₂ combines with 3 mole of H₂;
So;
[tex]\frac{1 mole of N_{2} }{3 moles of H_{2} }[/tex]
A student is running an experiment in which 60.3 grams of LiCl is needed, but the only jar of reagent in the lab is labelled lithium chloride monohydrate. How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound?
Answer:
Mass of the hydrated salt required is 85.8 g
Explanation:
Molar mass of anhydrous lithium chloride = 42.5 g/mol
Molar mass of lithium chloride monohydrate = 60.5 g/mol
Mass of water molecule in the hydrated salt = 18 g/mol
Ratio of lithium chloride to water molecule in the hydrated salt = 42.5 : 18
Mass of water molecule in the hydrated salt that will contain 60.3 g of lithium chloride = 60.3/42.5 × 18 g = 25.5 g
Therefore mass of hydrated salt required = (60.3 + 25.5) g = 85.8 g
The student will have to weigh out 85.8 g of the hydrated salt, and then heat the salt in an evaporating dish until it decomposes to liberates all the water of hydration in order to obtain the anhydrous salt.
Where is type of precipitation is most likely to form during a thunderstorm
Answer:
hail, btw have a nice day
Answer:
Hail
Explanation:
I got it right on my test
I need help with this
Answer:
There are 2 carbon atoms present.
Which sentence describes a spontaneous redox reaction between two
elements?
A. The element with the greater reduction potential is oxidized.
B. The element with the greater reduction potential is reduced.
C. The reduced element has a smaller reduction potential than the
oxidized element
D. The sum of the reduction potential and oxidation potential is
negative
Answer:
B. The element with the greater reduction potential is reduced.
Explanation:
I took the test
How many Joules must be removed to condense 150.0g of steam at 100.0 degrees Celsius to water at 100.0 degrees celcius
Answer:
339kJ
Explanation:
Given parameters:
Mass of steam = 150g = 0.15kg
Initial temperature of steam = 100°C
Final temperature of water = 100°C
Unknown:
Quantity of heat that must be removed to condense the steam = ?
Solution:
The heat involved here is a latent heat because there is no change temperature. The process is just a phase change.
H = mL
m is the mass
L is the latent heat of vaporization = 2,260 kJ/kg
Insert the parameters and solve;
H = 0.15kg x 2,260 kJ/kg
H = 339kJ
You are sitting outside on a warm day with a cold glass of water. You notice water droplets starting to collect on the outside of the glass. What kind of phase change are you observing?
1.Melting
2.Condensation
3.Evaporation
4.Sweating
Answer:
2
Explanation:
