B is your answer
If the ignition temperature of a fuel is lower than the room temperature, then it can catch fire very easily.
Therefore for an ideal fuel, the ignition temperature should be higher than the room temperature.
let's observe one by one
#1
If ignition temperature is below room temperature the fuel can catch fire at once.
No#2
Ignition temperature above room temperature is applicable as the fuel won't catch fire easily
True#3
It's boiling point of water not fuels
False#4
Equal to room temperature is same as first one can cause damage
NoGreen gram defination
For grade 7
a leguminous plant, Phaseolus aureus, whose seeds are used as food in India.
Answer:
Green Gram is a small round edible green bean which is also known as moong ki daal in the subcontinent.
Explanation:
The green gram bean which is also known as the mung, maash or moong, is a plant species in the legume family. The green gram bean is mainly cultivated in East, Southeast and South Asia. It is used as an ingredient in both savoury and sweet dishes.
Why would you argue this is the best energy source to use?
Answer:
really its tought or we can say confusing
°__°
Why does a short circuit occur?
A. Current likes to try and break the circuit whenever possible
B. Current always follows the path of least resistance
C. Current always follows the path of most resistance
D. Current randomly flows around the circuit
Answer:
Current randomly flows around the circuitt
Answer:
B. Current always follows the path of least resistance.
Explanation:
A short circuit occurs when the current finds a way to bypass the appliance on a path that has little or no resistance. When one path through the circuit has 0 resistance (a short circuit), current follows the path of least resistance only.
In Lhasa, Tibet, the elevation is 12,000 feet. The altimeter reading in an airplane is 19. 50 in Hg.
This pressure is equal to ___psi.
Given the data from the question, the reading (i.e pressure) of the altimeter in psi is 9.57 psi
Conversion scale1 inHg = 0.491 psi
Data obtained from the question Pressure (inHg) = 19.50 inHgPressure (psi) =? How to determine the pressure in psiThe pressure of the altimeter in psi can be obtained as illustrated below:
1 inHg = 0.491 psi
Therefore,
19.50 inHg = 19.50 × 0.491
19.50 inHg = 9.57 psi
Thus, 19.50 inHg is equivalent to 9.57 psi
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What is the difference between sulphur and sulphur molecules
NaCl and AgNO3 react in a double replacement reaction. Which is one of the products of this reaction?
NaNO3
AgClO3
CO2
NaAg
Answer:
nano3+agcl2
Explanation:
double displacement reaction
Infer Xenon, a nonreactive gas used in strobe lights, is a poor conductor of heat and electricity. Would you expect xenon to be a metal, a nonmetal, or a
metalloid? Where would you expect it to be on the periodic table? Explain.
Mark the lime poor conducter of heat and electricity.
Hence it's non metalYes why no ,Xenon is already has its secured place in modern periodic table.
It belongs to group 18,the Helium family and inert gas group having atomic no Z=54Xenon is a non-reactive gas. It will not conduct and react normally. Thus it can be classified as a non-metal. Xenon is placed in the inert gas or noble gas group that is group 18.
What are noble gases?Noble gases are inert gases in the 18th group of periodic table. Noble gases have completely filled orbitals and thus they no need other electrons.
Atoms participate in reaction when they are not stable because of the insufficient valence electrons. Noble gases such as argon, krypton, neon, xenon etc. have 8 valence electrons and thus are not reactive.
Metals are highly conductive and they are placed in the left side of periodic table. In periodic table, from left to right the metallic nature decreases and the other elements are called non-metals. Most of the non-metals are gases and very few such as silicon is metalloid.
Non-metals are insulators or poorly conduct electricity. Hence, xenon is a non-metal placed in the 18th group of periodic table.
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Eas: add two curved arrows to show how water acts as a base
Lithium nitride has a high melting point, 813*C. Nitrogen trifluoride has a low malting point, -207*C.
Explain why the melting points are different? [2 marks]
.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Answer:
Lithium has high melting and boiling point due to its small size, due to which it possesses high ionisation energy. As a result the binding energy in its crystal lattice is very high. This is why lithium has high melting and boiling point.
Explanation:
I HOPE IT HELPS! THANX!!
STAY SAFE!!!
Of the following acids, determine a. The strongest acid b. The acid that produces the lowest concentration of hydronium ions per mole of acid
Answer:
The bond strength of an acid generally depends on the size of the 'A' atom: the smaller the 'A' atom, the stronger the H-A bond. When going down a row in the Periodic Table (see figure below), the atoms get larger so the strength of the bonds get weaker, which means the acids get stronger.
Explanation:
The acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
What are weak and strong acids?Strong acids are completely dissociated into a solution.
Examples of strong acids are Hydrochloric acid, sulfuric acid, nitric acid, etc.
Weak acids are those that do not completely dissociate in a solution.
Examples are formic acid, acetic acid, nitrous acid, etc.
Thus, the acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
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Convert 18◦C to Kelvin.
291.15 Kelvin
I hope this helps
Answer:
18 degrees Celsius = 291.15 Kelvin
Explanation:
The formula for finding Kelvin through Celsius is by adding 273.15 to the Celsius. In this case, it is 18 + 273.15 = 291.15
:)
What is the molarity if 16. 0 grams of NaOH is dissolved in 855 mL of solution?
Answer:
734.0 grams
Explanation:
Because 16.0 and 855 mL it is 734.0 grams :) hope it helps
7.13 g of NaF are dissolved in enough water to make 201 mL of solution. What is the molarity of this solution
Answer:
0.846MExplanation:
To find the molarity, we have an equation: moles ÷ liter.
To find the moles of NaF, take the gram ÷ molar mass of NaF
7.13/42.0 = 0.170 moles of NaF
201 ml ÷ 1000 = 0.201L
0.170 ÷ 0.201 = 0.846MWhat is the percent by mass of a solution containing 4. 0g of solute in 100g of water? (Percent by mass formula: (mass of solute/mass of solution) x 100) A 40 % B. 3. 8 % 26 % D. 2. 1 %
A person observes that when the front porch of a house is wet , it is very slippery. The person adds sand to a paint can and repaints the porch’s surface.
How will the new paint make the porch safer?
Answer:
a
Explanation:
it will help stop frictoin
please help there are 3 answers brainlies is included with the best answer.
SUMMATIVE FOSSILS/FOSSIL RECORD/HISTORY OF LIFE ON EARTH
FOSSILS CAN BE CATEGORIZED INTO 3 MAJOR TYPES. THEY ARE:
REPLACEMENT
METAMORPHIC
TRACE
SEDIMENTARY
IMPRESSION
Answer:
Your answers would be:
-impression fossils
-trace fossils
-replacement fossils
Explanation:
Have a great rest of your day
#TheWizzer
Answer:
The are id-k- I dont know much on fossials. But did you know that thunder is lighting. I say this because thunder is just the noise lighting makes. We see the light firts because light travels faster than sound.
Explanation:
Hope This Helps
Have A Great Day
~Zero~
A neutralization reaction is a reaction between choose. That results in the formation of choose. And choose.
Neutralization reaction is the reaction that occur between acid and base.
What is Neutralization reaction?Neutralization reaction is the reaction that take place between acid and base to produce salt and water. For examples HCl react with NaOH to produce NaCl and H2O
Therefore, Neutralization reaction is the reaction between acid and base.
The question is not complete but the option are gotten from another website.
Here are the options.
an acid and a basea fuel and oxygenan acid and a metala salt and a baseLearn more about neutralization from the link below.
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Draw the major organic product of the following friedel–crafts alkylation. (an excess of benzene is present. ) do not draw any aluminum byproducts
The Friedel–crafts alkylation provide a nice way of attaching an alkyl group to an aromatic compound.
What is Friedel–crafts alkylation?The Friedel–crafts alkylation occurs when an alkyl group is added to an aromatic compound.
The reaction mechanism commences with the attack of an alkyl halide on an aromatic substrate using AlCl3 as a catalyst. This question is incomplete henece we can not draw the structure of the product. The alkyl portion of the alkyl halide is now attached to the aromatic compound at te end of the reaction.
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During the course of a catalytic reaction the following occurs: 1) Substrate is covalently bound and oriented with proximity to the active site residues. 2) Negative charge builds up on the substrate and is stabilized. 3) Oxidation of the enzyme followed by reduction to complete the catalytic cycle. What type of chemical species can facilitate these reactions? A) nucleophilic amino acids B) electrophilic groups C) prosthetic phosphate groups D) transition metal anions E) transition metal cations
During the course of a catalytic reaction Substrate is covalently bound and oriented with proximity to the active site residues.
The type of chemical species which can facilitate these reactions is transition metal cations.
What is an Enzyme?These are proteins that act as biological catalysts and accelerate chemical reactions.
They function by binding to the substrate and requires the use of transition metal cations which acts as cofactors.
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What is the attraction between water molecules called?.
A 112g sample of co(g) is combined with a 32g sample of o2(g) and the reaction represented proceeds as completely as possible.which two of the following statements are correct? *
a. co(g) is the limiting reactant.
b. o2(g) is the limiting reactant.
c. 4mol of co(g) reacts.
d. 2mol of co(g) remains unreacted.
e. 144g of co2(g) is produced.
Based in the equation of the reaction, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted
What is the equation of reaction between CO and O2?The reaction of carbon(ii) oxide, CO and oxygen, O2 is a redox reaction which produces carbon (iv) oxide, CO2.
The equation of the reaction. is given below:
2 CO + O2 ----> 2 CO2From the equation of the reaction, 2 moles of CO are required to react with 1 mole of O2 to produce 2 moles of CO2
The moles of the reacting substances is calculated using the formula:
moles = mass/molar massMolar mass of CO = 28 g
Moles of CO = 112/28 = 4 moles
Molar mass of 02 = 32 g
Moles of O2 = 32/32 = 1 mole
Therefore, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted.
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What volume of a 0. 120 m cai2 solution would contain 0. 078 mol of the solute?.
Answer:650 mL
Explanation:
Remember that Molarity = mol/L. Rearranging the equation to solve for liters you get L = mol/Molarity.
80x10-3 mol / 12x10-2 M = 6.5x10-1 L
6.5x10-1 L (1x103) = 6.5x10 2 mL = 650mL
How many moles are in 4. 75 x 1025 molecules of O2?
Answer: 78.9 moles
Explanation:
4.75 x 10^25 molecules (1 mole / 6.02 x 10^23 molecules) = 78.9 moles :)
Give a difference in physical properties between the chlorine and potassium chloride
Answer:
Chlorine exists as gaseous state while potassium chloride as a solid
Physical properties between the chlorine and potassium chloride are totally different because chlorine is available in gaseous form while potassium chloride available in solid form.
What are physical properties between the chlorine and potassium chloride ?Potassium chloride crystals are composed of face-centered cubic (FCC) unit cells. KCl has a molar mass of 74.5513 grams/mol.
It has a density of 1.984 grams per cubic centimeter when it is solid and crystalline. Potassium chloride has melting and boiling temperatures of 1040 K and 1690 K.
A metal halide salt made of potassium and chlorine is known as potassium chloride. It appears as a white or colorless vitreous crystal and has no odor.
Thus, chlorine is present in gaseous state while ptassium chloride present in solid state.
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Which of the following best illustrates a natural process acting as a constructive force
Answer:
Wind depositing sand to build up sand dunes.
Explanation:
What impact will sea level rise have on farming and water supply?
I
Even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.
Explanation:
I hope this helps
word equation for magnesium carbonate and nitrate (V)acid.
Answer:
This is an acid-base reaction (neutralization): MgCO 3 is a base, HNO 3 is an acid.
Explanation:
HNO3 + MgCO3 → H2O + CO2 + Mg(NO3)2
If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will the molarity of the solution be?
Answer:
Explanation:
Molarity = number of moles / volume
If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M
The molarity of the solution will be 7 M.
What is molarity ?The total count of moles of solute per liter of a particular solution is known as a solution's molarity.
What is solution?The volume of just an object is a measurement of how much space it takes up.
Molarity of the solution can be determined by the formula:
[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]
where, M = molarity of solution. V = volume.
Given data:
[tex]M_{1}[/tex] = 3.50 M
[tex]M_{2}[/tex] = ?
[tex]V_{1}[/tex] = 550 mL
[tex]V_{2}[/tex] = 275 mL
Now, put the value of given data in molarity equation.
[tex]V_{2} = M_{1} V_{1} /M_{2}\\V_{2} = (3.50 M) (550 mL) / (275 mL)\\V_{2} = 7 M[/tex]
Therefore, the molarity of the solution will be 7 M.
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what may cause some short term environmental changes how would organisms respond to these changes
Answer:
Refer to explanation
Explanation:
Weather is the main cause behind most short term environmental changes
For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery
Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends
What happens to the sunlight when it reaches the Earth's surface?
O
All of the sunlight is reflected from the Earth's surface and radiated
back into space
O
Some of the sunlight is captured as heat on Earth, and some of it is
radiated back to space.
O
All of the sunlight is absorbed by the Earth's surface
Answer:
the second one
Explanation: