Answer:
the sum of average kinetic molecules of the body is called temperature..
calculate the number of moles in 200 grams of Sodium hydroxide
Answer:
The answer is 5 mol
Explanation:
Number Of Moles = Mass Of Substance ÷ Mass Of One Mole
Mass of NaOH = Molar Mass of Sodium + Oxygen + Hydrogen
23 + 16 + 1
40 g/mol
Number of Mole = 200/40 = 5 mol
Thus, The number of Moles in 200 grams of Sodium hydroxide is 5 mol
-TheUnknownScientist 72
how many moles of iron are needed t react with 16 grams of sulfur?
Answer:
adwasd
Explanation:
Pls help, needed for chemistry
Answer:
go to a calculator and see the answer then make the hypothisis which is the answer
Explanation:
magic
vanadium v hydroxide formula
Molecular Formula: H5O5V-5
what is one advantage of using a computer over a graphic calculator?
Answer:
Computers are more useful for quick calculations.
Computers are easier to transport to remote locations.
Computers have lower power consumption.
Computers hold larger amounts of data.
give brainliest pls
Provide the correct IUPAC name for the compound shown here.
Answer:
Cis-2-methyl-3-hexene
Cis-2-methyl-3-hexene is the IUPAC name for the compound shown here.
What is compound?In chemistry, a compound is a material made up of two or more separate chemical elements mixed together in a specific proportion. When elements interact with one another, chemical bonds that are difficult to break are formed. Atoms share or trade electrons, which results in the formation of these bonds.A compound is a substance formed through the chemical combination of two or more elements. Ionic and covalent bonds are two common types of bonding used to join substances to form compounds. Each component of any compound is always present in a specific proportion.A compound is a chemical substance made up of identical molecules made up of atoms from multiple elements held together by chemical bonds.To learn more about compound refer to:
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help I can't find the answers
Answer:
baking soda - sodium hydrogen carbonate
bleach (liquid) - sodium hypochlorite
bleach (solid)- sodium hypochlorite
borax- sodium tetraborate decahydrate
brimstone- magnesium sulfate heptahydrate (sulfur)
cream of tartar- potassium hydrogen tartrate
Epsom salt- magnesium sulfate
Freon- Dichlorodifluoromethane
galena- gray lead sulfide
grain alcohol- ethanol
graphite- carbon silicon family
gypsum- calcium sulfate
hypo- sodium thiosulfate
laughing gas- nitrous oxide
lime- calcium hydroxide
limestone- calcium hydroxide
lye- sodium hydroxide
(i'll finish the rest later)
Explanation:
A scientist studies weather patterns to learn where and how fast the wind blows in different situations. How might this scientific knowledge be used to solve a practical problem?
It could help to decide where to put windmills to capture wind energy.
It could help to predict when dangerous storms are coming so people can prepare.
It could help in designing buildings so that they are not damaged by wind.
All of the above.
Scientific knowledge be used to solve a practical problem through all of the above which are:
It could help to decide where to put windmills to capture wind energy.It could help to predict when dangerous storms are coming so people can prepare.It could help in designing buildings so that they are not damaged by wind.What is Wind?This is defined as the movement of air and other gases on the surface on the earth. Wind intensity varies according to various factors and it's best to study it as helps to prepare for unforeseen circumstances.
Its knowledge helps in the building of windmills so as to ensure efficient capture of winds.
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NaOH(aq) is transferred into a test tube. CaCl2(aq) is added to the tube. What is the formula for the precipitate (if any) that forms
Answer:
2NaOH (aq) + CaCl2 (aq) -> 2NaCl(aq) + Ca(OH)2(s)
Formula of precipitate: Ca(OH)2 (s)
Explanation:
First, we do the double replacement reaction to determine our chemical equation between the reactants and products. Once we have our products, with a solubility chart (I added one below) we can determine which of the products is soluble or insoluble.
In this case NaCl is soluble or aqueous (meaning it can dissolve in water) and Ca(OH)2 is insoluble (meaning that when the reactions takes place, these two will form a solid/precipitate)
A student had a 15 cm long glass stirring rod with a density of 1.500 g/cm3. They
accidently dropped it on the laboratory bench and it broke. One part was 10 cm long and
the other was 5 cm long. What is the density of the larger piece?
The density of the larger broken piece from the original piece would remain 1.500 g/cm3
DensityDensity = mass/volume
The ratio of mass to the volume of a substance is constant.
Thus, for the long glass stirring rod, a reduction in the length means a reduction in its volume. Also, there would be a commensurate reduction in the mass of the glass rod.
At the end of the day, the ratio of mass/volume of the glass rod, be it the larger or the smaller piece, remains the same.
Thus, the density would remain 1.500 g/cm3.
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According to the passage, which of the following is an example of a simple machine that makes our work easier?
A
a lawnmower used to cut the grass
B
a laptop computer that fits easily in a backpack
C
a pulley that lifts an elevator off the ground
D
a remote control for the television
Answer:
C, A pulley that lifts an elevator off the ground
Explanation:
Basically, it's just easier than a human doing it because that would probably be too much work for humans.
Answer:
C
Explanation:
Arturo viewed a world map showing the distribution of water scarcity. He knows that certain areas have little trouble with water scarcity, while others
have difficulty finding usable water.
The continent most affected by the water scarcity is __________
Answer:
Prolonged and potentially destabilizing water shortages will become commonplace in Jordan by 2100, new research finds, unless the nation implements comprehensive reform, from fixing leaky pipes to desalinating seawater. Jordan’s water crisis is emblematic of challenges looming around the world as a result of climate change and rapid population growth.
Explanation:
Sodium gives up the single electron in its outer shell in a reaction leaving it with 11 protons and 10 electrons
True or false?
I GIVE MORE POINTS WHO ANSWER THIS QUESTION. Which option describes a wavelength of light? (1 point) O a distance between two similar points on a wave of light O a type of visible light O an object that makes light bend or bounce O a heated atom that forms light
Answer:
It's the first option. A distance between two similar points on a wave of light.
Explanation:
On a wavelength chart, where you measure the rate at which the light travels at its distance from the source. You have two points to compare to.
I GIVE BRAINLY Which statement best defines visible light? (1 point) O a type of atom found in energy O a form of energy that allows people to see O a distance between one part of a wave and another O a change in direction of light when it strikes an object
Answer: A form of energy that allows people to see
Explanation:
Nicki Minaj
What is the IUPAC name for NH3?
ammonia
mononitrogen hydride
mononitrogen trihydride
nitrogen trihydride
Answer:
The IUPAC name for NH3 would be Azane
Explanation:
Answer: 1. nitrogen trihydride
2. ammonia
Explanation: 1.Choose the correct name for NH3 according to the naming system being used. What is the IUPAC name for NH3?
2. What is the common name for NH3?
How Can I prepare Conc. of Ethanol in water 25% …?
Answer:
25 percent solution by mass of ethanol means that 100 gram of solution contains 25 gram of solute i.e-ethanol. Now,as the density of the solution is 1 g/ml so 100 g of the solution has a volume of 100 ml. So,we have 25 gram of ethanol in 100 ml of the solution. So we have 250 g of ethanol in 1 litre of solution.
Explanation:
Which of the following is an example of a molecule? A. Cl(chlorine) B. HCl (hydrochloric acid) C. Hydrogen D. Bromine
Answer:
hydrogen
Explanation
a molecule of hydrogen is the simplest possible molecule . its consists of two protons and two electrons heid together by electrostatic forces. like atomic hydrogen the assemblage can exist in a number of energy levels
How do you find the delta H per grams in an chemical formula
Answer:
•How do you find the delta H per grams in an chemical formula
➢ Subtract the sum of the heats of formation of the reactants from that of the products to determine delta H: delta H = –110.53 kJ/mol – (–285.83 kJ/mol) = 175.3 kJ.
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Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density of 1.0432 g/mL at 20 o C. What is the concentration of this solution in the following units?
i) mole fraction
ii) molality
iii) mass percent
The molality of the solution is 0.00037 m.
What is concentration?The term concentration refers to the amount of solute in a solution.
We have the following information;
Molarity = 0.335 M
Density = 1.0432 g/mL
Temperature = 20 o C
The molality of the solution is obtained from;
m = 0.335 M × 1.0432 g/mL/ 1000(1.0432 g/mL) - 0.335 M (342 g/mol)
m = 0.344/1043.2 - 114.57
m = 0.344/928.63
m = 0.00037 m
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round off 3259 to 3 sig figs (show work)
Answer:
3260
Explanation:
3259
as the number after the 3rd number (9) is greater than 5, the 3rd number (5) can be rounded off to be 6
so,
3259
≈ 3260
this is the only method i know of solving this type of question
hope it helps
thnxx
Answer:
3260
Explanation:
3259
the number after the 3rd significant figure(3rd number) is 9 which is greater than 5 so you make the number 0 and add 1 to the 3rd significant figure which is 5
= 3260
BRAINEST PLEASE
Calculate the percentage of zinc I zncl2
Answer:
47.8 %
Explanation:
Ar of Zn = 65
Mr of ZnCl2 = 65 + (2 * 35.5)
= 65+ 71
= 136
Percentage Composition
= ( Ar of element × No of atom in formula ) / Mr of compound * 100 %
% composition of Zn = ( 65*1 )/ 136 × 100 %
= 47.7941...
= 47.8 % ( 3 s.f )
Which type of molecule gives plants their firm structure?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
??
The type of molecule which gives plants their firm structure Carbohydrates (option A) as there develop cellular structures like cell walls or stems .
What are the importance of carbohydrates to plants?Complex organic compounds called carbohydrates serve multiple functions for plants- primarily as their primary energy source and secondly to build specific cellular structures like cell walls or stems. Undoubtedly, one of the most ubiquitous types of carbohydrates seen in these green wonders is cellulose which plays a dominant role in maintaining their structural integrity.
Cellulose consists of tightly intertwined chains formed by glucose molecules whose interaction results in exceptional durability making it paramount for plant rigidity and survival alike.
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What is the percent of calcium ion in Ca3(PO4)2
Answer:
Therefore, we can write that the mass percentage of all the elements in calcium phosphate is 38.71% calcium, 20% phosphorous and 41.29% oxygen.
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
[tex]kai6417[/tex]
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You went for a hike on the mountaintop near your vicinity. To help you regain your strength following the exhausting work, you decided to hard-boil an egg and eat it. To your surprise, water seem to boil than usual, but after 10 mins in boiling water, the egg is still not cooked, why is that?
This is because increasing altitude lowers the boiling point of water.
What is Boiling point?This is referred to as the temperature in which a liquid starts changing into steam or vapor.
Increasing altitude lowers the boiling point which is the main reason why the egg wasn't cooked when placed in the boiling water. The temperature at which the water boils isn't sufficient enough to cook the egg in this type of scenario.
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The indicator phenolphthalein is added to the _____________. Select one: Solute Titrant Water Analyte
The indicator phenolphthalein is added to the Analyte
The use of indicators in chemical reactionIndicators are chemical substances that are added to a chemical reaction which gives a visible sign usually by a colour change.
Examples of indicators are:
phenolphthalein Methyl orange andLitmusThe indicator phenolphthalein is usually added to an analyte which is the chemical constituents that are been measured.
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How many grams of HNO3 are produced when 57.2 g of NO2 completely reacts?
Answer:
Who was the first president of United States?
A Benjamin Franklin
B George Washington
C Abraham Lincoln
D John Adams
Answer:
High points please help *NO TROLL ANSWERS*
kayla wants to find the width, AB, of a river. she walks along the edge of the river 150 ft and marks point c. then she walks 32 ft further and marks point D. she turns 90° and walks until her location, point A, and point C are collinear. she marks point E at this location, as show.
N2+3H2 forms 2NH3
When 3.00 moles of N2 react with excess hydrogen, how many moles of NH3 are formed?
ok ther only one solution n2 is ÷ 2h×2 is ok but the problem is that the standard form of the square is not yet
Why is the dihedral angles between the methyl group in Gauche conformation of n-butane slightly larger than 60°?
Answer:
When the dihedral angle = 60° or 300°, (gauche conformation) in butane, the methyl groups are farther apart and therefore the potential energy drops by 4.1 kcal/mol.
2H2 + O2 --> 2 H2O
+
How many moles of oxygen is required to produce 13.3 moles of water?
Answer:
Explanation:
Let the number of moles of oxygen = x
2H2 + O2 --> 2 H2O
x 13.3
Since the balance number for oxygen is 1 and the balance number for water is 2, you must set up a proportion. (Those balance numbers represent the number of moles).
1/x = 2 / 13.3 Cross Multiply
2*x = 13.3 Divide both sides by 2
2x/2 = 13.3/2
x = 6.65
You need 6.65 moles of oxygen.