Answer:
K=39, N=14, O=16. So molar mass of KNO3= 39+14+3(16)= 101
Im Wrong?
Calculate the molar mass of Li2SO4.
Answer:
109.94 g/mol
Explanation:
Li is 6.94 and there's 2 of those = 13.88
1 S = 32.06
4 O = 63.996
Add all of those together to get 109.936 round to 109.94
the question is a picture pls help
The unknown alcohol = 2-propanol
Further explanationGiven
volume = 50 ml
mass = 39.4 g
Required
The unknown alcohol
Solution
Density of sample :
= mass : volume
= 39.4 g : 50 ml
= 0.788 g/ml
The unknown alcohol at room temperature = liquid, so the unknown alcohol is 2-propanol because it has temperature range between -90 to 82 for liquid and the density = 0.788 g/ml
Help me plzz and thank u
Answer:
the terminator because i did this test
Think of a substance that does not dissolve in water. Any Examples?
Answer:
sand, flour, water
Explanation:
Some substances that don't dissolve in water:
- sand
-flour
-oil
-fats
-plastics
What is one factor of how species are distributed on the Earth's continents?
Answer:
The most apparent general environmental factor affecting the distribution of a species is climate. Suitable conditions of temperature and moisture are vital to all organisms. Certain species are intolerant of cold; other species cannot live in warm climates.
please help PLSSSS
2020020200
Answer:Well the water molecules attract each other, and the oil molecules stick together.
sorry number two im not sure sorry:(
Explanation:
Tikiya is conducting experiments on samples of pure copper (Cu). While collecting data, Tikiya records both physical and chemical properties of the metal. Which of the following is dependent on the amount of copper particles in the sample? A. Electrical conductivity B. Thermal conductivity C. Mass D. Density
Answer: Mass
Explanation: I had the same question hope its right for you
Three students shine lights onto the same spot on a white table. One student shines a blue light. Another student shines a red light. The third student shines a
green light. What color will the spot appear to be?
black
B orange
white
yellow
Help plz asap
PLEASE HELP!! ILL MARK BRAINLIST!!
Why does sulfur stink so bad?
Answer:
Since pure natural gas (a.k.a. methane) has no smell, utility companies add smelly, sulfur-containing odorants called mercaptans, or thiols, to warn us if anything is amiss with our pipelines. ... Olfactory receptors are present in specialized sensory cells called olfactory sensory neurons, which line our noses
Explanation:
hope this helps have a good rest of your night :) ❤
Which of the following is not a form of precipitation?
A
groundwater
B
balls of hail
C
sleet
D
snowflakes
A.
Reason: cuz i need points noob
Which of the following is an example of chemical energy being used?
A.Eating a sandwich
B.Reading a book
C.Switching on a fan
D.Turning on the light
I feel like it's C. or D. but I guess it's C.
Metamorphic rock is formed from the weathering, erosion and cementing of sediments.
True
False
Answer:
False
Explanation:
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
This question is reffering to sedimentary rocks, so it's false.
Answer:
Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth's surface breaks down rocks into small and smaller pieces. When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks.
Explanation:
True
Complete the following equations (note that the equations are not balanced). Use the activity series if necessary. Li >>Ba > Sr> Ca > Na > Mg > AI > Mn> Zn > Cr> Fe > Cd > Co > Ni > Sn > Pb>H> Sb> Bi > Cu > Ag > Pd > Hg > Pt > Au Na+Cl2 → ?
- NaCl
- NaCl2
- Na2Cl
Answer:
its C
Explanation:
Answer: NaCl
Explanation:
Na+ Cl2 ----> NaCl
4 In which medium would an electromagnetic
wave travel the fastest?
A. air
C. vacuum
B. granite
D. water
Answer:
the correct answer is air.
Answer:
water
Explanation:
the medium an electromagnetic wave travel the fastest is in water
What is true about the structure or function of the plasma membrane?
A:It is made entirely of integral proteins.
B:Hydrophilic molecules attract the water the cell requires.
C:The processes of endocytosis and exocytosis occur here.
D:The double layer prevents anything from entering the cell
Answer: hi theree, the answer is c. the processes of endocytosis and exocytosis occur here
hope this helps, have a good day :)
Explanation:
Answer:
C. The processes of endocytosis and exocytosis occur here
Explanation:
I just took the k12 test
What chemical compound is H4PN?
Answer:
Diphosphane
Explanation:
Hope it helps
I NEED HELP ASAP !
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
6. How many grams are in 5139 x10425
molecules of Al(OH)3
Answer:
1.
643.21g 1 mol 6.022^23
262.87 g 1 mol
= 1.4735E24 [Mg3(PO4)2]
2.
4.061x10^24 1mol 22.4 (L)
6.022^23 1mol
= 151 liters H2O2
3.
479.3g 1 mol 6.022^23
18.02g 1mol
= 1.60E25 H20 atoms
4.
80.34L 1mol 164.1
22.4L 1mol
588.6g Ca(NO3)2
5.
893.7g 1mol 22.4
44.01g 1mol
= 427 L CO2 or 427.4
6.
5.39 x 10^25 1mol 78.01
6.022^23 1mol
= 6980g Al(OH)3
hope this helps!! :)
PLEASE HELP!!!
True or False: Density is the property of a substance that describes how much mass of a substance is contained in the given weight of the substance.
A simple true or false please!
Answer:
False
Infered from the equation:
Density=[tex]\frac{Mass}{Volume}[/tex]
So it has no relation with weight of substance
Explain why photosynthesis and cellular respiration are the “real circle of life”
Explanation:Photosynthesis is important because the earth and all of the creatures in the sea and land need the plants to be able to feed themselves with the help of the sun and with cellular respiration, those plants are able to take in the carbon dioxide that we give and make into oxygen with we need. there fore without them we would not be able to exist.
At what temperature will 41.6 grams of nitrogen gas (N2) exert a pressure of 1 point
1.07 atm in a 20.0 L cylinder?
Answer:
The temp is 176k
Explanation:
Can someone please answer any of these?
Answer:
A polar covalent bond is defined as the bond which is formed when there is a low difference of electronegativities between the two non metals. Example: Phosphorous and chlorine, Nitrogen and hydrogen
Non-polar covalent bond is defined as the bond which is formed when there is no difference of electronegativities between the atoms. Example: Oxygen and oxygen
Ionic bond is formed when there is complete transfer of electron from a highly electropositive metal to a highly electronegative non metal. The electronegative difference between the elements is high. Example: Potassium and chlorine
What is the percent composition of sodium in Na3PO4? Express your answer to one decimal place. No units required.
Answer:
42.07%
Explanation:
Molar mass of Na3PO4 = 23×3 + 31 +16×4
= 69+ 31+64= 164 g/mol
Mass of Na in this compound is 69
Percentage of sodium in sodium phosphate = 69/ 164×100
Percentage of Na = 42.07%
which of the following situations violates the law of conservation of energy?
A. a ball dropped from the top of a building in speed until it hits ground
B. a block sliding freely on level ice increases in speed until it hits a wall
C. A child playing on a swing moves fastest at the bottom of the swing's path
D. The height a ball bounces decreases with each bounce
Answer:
A. a ball dropped from the top of a building increases in speed until it hits the ground.
A ball dropped from the top of a building in speed until it hits ground is the situations violates the law of conservation of energy. Therefore, option A is correct.
What is the law of conservation of energy ?According to the law of conservation of energy, energy is neither created nor destroyed. When you roll a toy car down a ramp, and it collides with a wall, the energy is transferred from kinetic to potential.
Energy conservation does not imply energy savings. Instead, energy is neither created nor destroyed, according to the law of conservation of energy. When people use energy, it does not vanish. Energy is transformed from one form of energy to another.
The law of conservation of energy is violated when a ball is dropped from the top of a building at high speed until it hits the ground.
Thus, option A is correct.
To learn more about the law of conservation of energy, follow the link;
https://brainly.com/question/29775341
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The vertical columns on the periodic table can be called families or?
The vertical columns may also be called "groups".
Molecules in a gas have lots of energy and spread out even more than molecules in a liquid. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water. If the atoms of an object are moving fast, the temperature would be
High
Low
Medium
Unknown
Answer:
High
Explanation:
The answer to this question has been hinted in the question;
molecules in warm water move faster than molecules in cold water
This means that the relationship between temperature and movement of atoms is as follows;
At higher temperatures, atoms possess more energy and due to this they are able to move at high velocity (really fast).
On the other hand, lower temperatures means that the atoms possess less energy and due to this they move with a lower velocity.
A 10-gram sample of water will lose the greatest amount of heat when its temperature is changed from 50°C to
1
10°C
2
20°C
3
30°C
4
40°C
Submit Answer
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Na
Answer:
10°C
Explanation:
Here the problem deals with the relationship between the amount of heat lost and the temperature change of a body.
From the relationship below:
H = m C Δt
H is the quantity of heat
m is the mass
C is the specific heat
Δt is the change in heat
We can see that the quantity of heat is directly proportional to the Δt, so as more heat changes occur, so also is the value of Δt .
What element has an energy level Electron Configuration of 2-8-18-8?
Argon
Calcium
Krypton
Chlorine
answer:
krypton.
explanation:
it is a noble gas, so has full-valence shell. also, reference back to the periodic table.
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What is the volume of a 492.2g sample of Kr gas?
0.007601 L
131.6 L
5.870 L
21.97 L
Answer:
131.6 L
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.
Mathematically,
PV=nRT
where,
P = pressure=1 atm
V= volume=?
n =number of moles=given mass/ molar mass
= 492.2/ 83.79
= 5.87 moles
T =temperature = 273K
R = Gas constant = 0.0821 L.atm/K.mol
1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K
V =131.5l
131.5l is the volume of a 492.2g sample of Kr gas.
Therefore, the correct option is option B that is 131.5l.
To learn more about ideal gas equation, here:
https://brainly.com/question/14826347
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How many atoms are there in 3.3 moles of strontium?
Explanation:
Multiply the moles Fe by 6.022×1023 atoms/mol