Answer:
A fuel is a natural substance that, when burned, produces energy (usually thermal/heat energy)
Answer:
Fuel is something that can be used to make some actions happen. Fuel is something that can be made to react with some other substances so that it releases energy as heat energy or some other kind of energy
Does anyone know what the molar mass is
Answer:
the formula is M = m/n
Explanation:
M = m/n is the molar mass equals the mass of the substance divided by the number of moles of a substance
Answer:
100.93 g/mol
Explantion:
When 5.0g of NH4CLO4 is added to 100mL of water in a calorimeter, the temperature of the solution formed decreases by 3.0C?
Answer:
24.7 C
Explanation:
I don't know how
The final temperature of 1000 ml water by the addition of 5 g ammonium perchlorate has been 24.7 degree Celsius.
With the addition of 5 g of ammonium perchlorate, the drop in temperature has been:
The addition of 5 g sample to 100 ml water has absorption of energy, that results in change in temperature of 3 degree Celsius.
The heat absorbed by sample has been given as:
Heat = mass × specific heat × change in temperature
Since, the same mass of sample has been added to 25 degree Celsius water, according to law of conservation, the change in density for both the changes has been equivalent.
The ratio of masses has been equivalent to the ratio of volume.
[tex]\rm \dfrac{Mass\;at\;1000\;ml}{Mass\;at\;100\;ml}\;=\;\dfrac{Volume\;at\;1000\;ml}{Volume\;at\;100\;ml}\\\\\\\dfrac{Mass\;at\;1000\;ml}{Mass\;at\;100\;ml}\;=\;\dfrac{1000\,ml}{100\;ml}\\\\\\\dfrac{Mass\;at\;1000\;ml}{Mass\;at\;100\;ml}\;=\;10[/tex]
Since, the mass at 100 ml and mass at 1000 ml has been equal, the heat absorbed by the sample has also been equal. Equating the values:
Mass at 100 ml × Specific heat × Change in temperature = Mass at 1000 ml × Specific heat × Change in temperature
[tex]\rm 3\;degree\;Celsius\;= \;\dfrac{Mass\;at\;1000\;ml}{Mass\;at\;100\;ml}\;\times\;Change\;in\;temperature\\\\3\;degree\;Celsius\;= \;10\;\times\;Change\;in\;temperature\\\\Change\;in\;temperature\;=\;\dfrac{3}{10}[/tex]
Change in temperature = 0.3 degree Celsius.
The initial temperature of water has been 25 degree Celsius. The change in temperature has been given by:
Change in temperature = Initial temperature - Final temperature
0.3 degree Celsius = 25 degree Celsius - Final temperature
Final temperature = 25 - 03 degree Celsius
Final temperature = 24.7 degree Celsius.
The final temperature of 1000 ml water by the addition of 5 g ammonium perchlorate has been 24.7 degree Celsius.
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The melting point of a 100g piece of zinc metal is 419ºC. If the sample is cut in half, the melting point of each half would be 419ºC. True or False
Answer: true
Explanation: same as the melting point of a gram or a tonne
hi please help, what is the correct formula for zinc nitrate?
A. ZnNO3
B. Zn, 2, N, 3
C. Zn(NO3)2
Answer:
The answer is (c) Zn(No3)2
Explanation:
Because we know the cation of zinc is+2 and whereas nitrate is anion, -1.
Does anyone know this ?Please I need help
Explanation:
Entropy refers to the degree of disorderliness of system. Basically it refers to how random a system is.
Gong through the options.
A. The phase change is from solid to liquid. Liquid has a greater degree of disorderliness compared to solid hence entropy is increasing.
B. The phase change is from solid to gas. Gas particles has a greater degree of disorderliness compared to solid hence entropy is increasing.
C. The phase change is from aqueous to liquid. Aqueous solutions has a greater degree of disorderliness compared to liquid hence entropy is decreasing.
D. The reactant side has; solid + gas. In the product side, there is only gas. The product side has a greater degree of disorderliness hence the entropy is increasing.
E. The entropy of the product is greater than the entropy of the reactants hence entropy is increasing.
F. The phase change is from aqueous to solid. Aqueous solutions has a greater degree of disorderliness compared to solid hence entropy is decreasing.
Classify each chemical compound listed in the table below.
type of compound (check all that apply)
compound
ionic
molecular
acid
base
H, SO:
HI
KI
Nacioz
Help me plz!
Answer:
Please find attached the table of classification of the chemical compounds, created with Microsoft Word
Explanation:
The given compounds are;
H₂SO₃ is an acid which is known as sulfurous acid
When SO₂ is added to water, we have;
SO₂ + H₂O ⇄ HSO₃ + H⁺
Therefore, H₂SO₃ is ionic
2) HI which is known as hydrogen iodide, dissolves in water as follows
HI (g) + H₂O (l) ⇄ H₃O⁺(aq) + I⁻(aq)
Therefore, HI is able to donate hydrogen ions therefore, it is both acidic and ionic
3) KI is a salt of the alkali metal, potassium, and iodine which is a group 7 element such that it formed by the transfer of electrons from potassium to iodine making it an ionic compound
KI forms a slightly alkaline solution
4) NaClO₃ comprises of the ionic combination of sodium and chlorate ions which dissolves in water as follows;
NaClO₃ → Na⁺(aq) + ClO₃⁻(aq)
Therefore, NaClO₃ is ionic
NaClO₃ is also a strong oxidizing agent, making a Br∅nsted acid
we have;
Sulfurous acid (also Sulfuric(IV) acid, Sulphuric acid (UK), Sulphuric(IV) acid (UK)) is the chemical compound with the formula H2SO3. There is no evidence that sulfurous acid exists in solution, but the molecule has been detected in the gas phase.[1] The conjugate bases of this elusive acid are, however, common anions, bisulfite (or hydrogen sulfite) and sulfite.
If both parents have on dominant gene and one recessive gene, what is the ratio of children
that will exhibit the dominant gene?
Answer:
the child would have a 1 in 2 chances of having a dominant gene
Explanation:
Parent 1 Parent 2
d d
r r
child
d
d= dominant
r= recessive
What makes something a science
Answer:
Math like Science is Math combined with the calculations and all that stuff so
Explanation:
Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool)
Write the name of CO
Answer:
cobalt
Explanation:
1. Which of the following is a linear inequality in two variables?
A. 7x - 4y = 3
C. 2t < 6
B. 4m + 3 < 23
D. 3 + 5t 2 3r
2. Which of the following is NOT a linear inequality in two variables?
A. 4a - 2b > 7
C. 6p 2
B. 4 + 8x < 14y
D. 5m + 6 > 3n
3. In linear inequalities in two variables, it has
solution/s.
A.O
B. 1
C. 2
D. Infinite
4. In the Inequality x + y = 5, which of the following in NOT a solution?
A. (4, 5)
B. (2, 2)
C. (1, 3)
D. (4,0)
Answer:
A. 7x - 4y = 3C. 6p 2C. 2A. (4, 5)Answer:
I hope I can help you
Explanation:
I hope I can help you
Summarize how you would go about calculating the grams of product given the grams of reactant you start with.
Bar Magnet Number
(B)
Location of Magnet
(Find 3 separate
locations where the
magnet number is
high, medium and low)
Bar Magnet
G
Magnetic (B) Field
B
5.26 G
Bx
3.20 G
G
Ву
4.17 G
52.52 0
Answer:
tell me how you want
this done?
Explanation:
pls help 6th grade science
Answer: car b
Explanation:
what did mendel know of dna genes and alleles
In the following compound (HCl) How many electrons are gained and lost by each atom?
In the following compound (NaCl) How many electrons are gained and lost by each atom
Explanation:
In HCL, one positive atom is given to chlorine from hydrogen so that it can complete it's octate. chlorine take one electron from hydrogen.
In NaCl, Sodium takes one electron from chlorine to complete its orbit with eight electrons. Chlorine gives one electron to sodium.
how is a compound different from mixtures
Answer: a compound is a substance that is made up of more than one type of atoms bonded together, mixtures are a mix of multiple elements or compounds which haven't bonded together.
Explanation:
What is the answer??
Answer:
3 you use elements instead of numbers and arrows instead of equal signs
actually it would be more like word problems you have 4 apples plus 3 oranges yields 7 apple orange things but it doesn't yield 7 of them it would be an equal ratio of moles of the fruits
4 the arrow is an equal sign
Explanation:
why is mineral water a compound
Answer:
Because it is made up of different minerals which are chemically combined.
Explanation:
How many moles of S would I have if I had 11 grams? (Stoichiometry) HELP
0.34 mol S
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
11 g S
Step 2: Identify Conversions
[PT] Molar Mass of S - 32.07 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 11 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S})[/tex]Multiply/Divide: [tex]\displaystyle 0.343 \ mol \ S[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
0.343 mol S ≈ 0.34 mol S
When describing the electrons in an orbital, we use arrows pointing upward and downward to indicate what property?
(A.) electron configuration
(B.) electron orbitals
(C.) electron charge
(D.) electron spin
Answer:
D.) electron spin
Each sublevel is labeled by its principal energy level and sublevel. Electrons are indicated by arrows inside of the circles. An arrow pointing upwards indicates one spin direction, while a downward pointing arrow indicates the other direction
Why does Play-Doh taste salty?
Pls my science teacher wants an answer so pls answer ASAP i need an explaination
Answer:
It's made of salt
Explanation:
The recipe has salt as an ingredient
Answer:
playdoh is literally made of salt. thats why it tastes salty
Explanation:
what are oil and waters properties of matter?
Answer:
Two other beneficial properties of the oil include the inhibition of corrosion of metal surfaces, such as steel, and the removal of dirt and detritus via detergency.
Properties of water include its chemical formula H2O, density, melting, boiling point & how one molecule of water has two hydrogen atoms covalently bonded to one oxygen atom.
Carbon exists in many forms on Earth. The diagram below shows part of the carbon cycle. What is happening in Step 1? *
1 point
Captionless Image
Animals are decomposing and releasing carbon into the soil.
Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
Animals are releasing energy into the environment and storing carbon.
Animals are converting carbon dioxide from the atmosphere to oxygen.
The first step of carbon cycle is animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
What is a carbon cycle?Carbon cycle completes into four steps: photosynthesis, decomposition, respiration, and combustion.
In the first step, carbon enter the environment by respiration, and in the second step, carbon dioxide is consumed by plants.
Thus, the correct option is B.
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4. Which of the following statements
about homeostasis is NOT true?
A Maintaining homeostasis requires that all
of the body systems work together.
B Long periods of stress can disrupt
homeostasis.
C Body temperature is a factor of
homeostasis.
D Only the nervous and endocrine systems
are involved in maintaining homeostasis.
Answer: Only the nervous and endocrine systems are involved in maintaining homeostasis.
Explanation: Hope this helped you
D. Only the nervous and endocrine systems are involved in maintaining homeostasis.
Living systems maintain homeostasis, which is defined as a state of constant internal, physical, and chemical conditions. This is a state of optimal functioning for the organism in which several variables, such as body temperature and fluid balance, are maintained within pre-determined boundaries.All of the body's systems must operate together to maintain homeostasis.Long periods of stress can cause homeostasis to be disrupted.Homeostasis is influenced by body temperature.Statement that is incorrect about homeostasis is "D. Only the nervous and endocrine systems are involved in maintaining homeostasis."For more information:
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what are the properties of acids
Explanation:
Aqueous solutions of acids are electrolytes, meaning that they conduct electrical current.
Acids have a sour taste.
Acids change the color of certain acid-base indicates.
Acids react with active metals to yield hydrogen gas.
Acids react with bases to produce a salt compound and water.
Find the mass of 5 mol of NaOH.
(I need the answer in the next few minutes with work)
Answer:
199.985 or 200 g NaOH
Explanation:
Not sure if you want an explanation or not but take the 5 mol/ 1 mol NaOH and multiply by molar mass of NaOH which is 39.997/40.
A patient needs to take 875mg twice daily The pills in the bottle are each 250mg How many pills does she wants to take 875mg
Answer:
[tex]3.5[/tex] pill need to taken for completing dosage of [tex]875[/tex] mg
Explanation:
Total dosage of medicine to be taken in a day
[tex]= 2 * 875 \\= 1750[/tex]mg
Total weight of one pill [tex]= 250[/tex] mg
Number of pills required is equal to total dosage of medicine divided by the weight of one pill.
Hence,
Number of pills
[tex]= \frac{875}{250} \\= \frac{175}{50} \\= \frac{35}{10} \\= 3.5[/tex]
Objects can be charged when electrons move from one object to another by direct contact 1.Charging by conduction (contact) 2.Charging by conduction (contact), , 3.Charging by friction 4.Static electricity charging by induction
Answer:
Charging by conduction (contact)
Static electricity charging by induction
Explanation:
A body can be charged when another body is made to touch it such that charges are transferred from a charged body to an uncharged body. This is known as charging by contact.
A body can also be charged by induction. In this case, a charged body is only brought near an uncharged body without really touching the uncharged body. Charges are transferred without physical contact of the bodies.
Answer:
the one above is correct
Explanation:
-no need-
how do isotopes of an atom differ? how are they the same?
Answer: Isotopes of an atom are different because they have different atomic masses and different number of neutrons within their nucleus. They are the same since they will always have the same atomic number/number of protons in their nucleus.
Explanation:
Ba(CN)2
What is the name of the compound?
Answer:
Barium cyanide
Explanation:
I don't no
The name of the compound Ba(CN)₂ is called barium cyanide.
The compound Ba(CN)₂ is called barium cyanide. It is a white crystalline solid that is soluble in water. Barium cyanide is a toxic compound and can be fatal if ingested. It is used in electroplating and other metallurgical processes.
The name of the compound is derived from the names of the elements that make up the compound. Barium is named after the Latin word for "heavy", and cyanide is named after the Greek word for "blue". The -ide suffix indicates that the compound is an ionic compound, with barium as the cation and cyanide as the anion.
The chemical formula for barium cyanide can be written in a few different ways. The most common way is to write it as Ba(CN)₂. This formula shows that there is one barium atom for every two cyanide atoms. The formula can also be written as BaCN₂, but this is less common.
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