Answer:
21.2 gm
Explanation:
calculate the mass of butane needed to produce 64.1 g of carbon dioxide to three significant figures and appropriate units
butane is the hydrocarbon C4H10
in combustion, we react hydrocarbons with O2 to form CO2 and H2O
so
C4H10 + O2----------------> CO2 + H2O
BALANCE
2C4H10 + 1302--------> 8CO2 + 10 H2O
the molar mass of CO2 is 12 + 16X2 = 44
64.1 gm of CO2 is
64.1/44 = 1.46 MOLES OF CO2,
FOR EVERY 8 MOLES OF CO2 WE NEED 2 MOLES OF BUTANE IT IS A
8:2 OR 4:1 RATIO. THE MOLES OF C4H10 ARE 1/4 THE MOLES OF CO2
SO
THE MOLES OF C4H10 H10 ARE 1.46/4 =0.365 MOLES
THE MOLAR MASS OF BUTANE IS 58.12
0.365 MOLES OF C4H10 HAS A MASS OF 0.365 X 58.12 = 21.2 gm
If the average speed of a car is 45 km/hr, how far can it travel in 0.5 hours
Answer:
22.5 Km
Explanation:
45km/hr * 0.5 hr = 22.5km
Can someone answer that first this pls im lost
Compare the box on the left containing the reactants in a chemical reactions. Which box on the right is the correctly represents the products according to the Law of Conservation of mass?
A) A.
B) B.
C) C.
D) D.
Answer:
d is the right answer
please mark me brainlist
how would you distinguish a simple microscope from a compound one
Answer:
A simple microscope employs a concave mirror. A compound microscope employs a plane mirror at one side and a concave mirror at the other. It contains only one adjustment screw to move the limb up and down for focusing on the object.
Answer:
D po
Explanation:
Sana nakatutulong
#Carry on learning
Pa brainliest po
Compound Y dissolves in ethanol but not water what type of bond is Y ?
Covalent Bond.
Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).
Ethanol being both polar and non polar can dissolve covalent compound.
Holding a marshmallow near a campfire flame causes it to turn brown even if the marshmallow does not touch the flame. Why does this happen?
A.
Dust blowing through the air causes the marshmallow to brown.
B.
Hot air in the atmosphere cooks the marshmallow.
C.
Heat radiates from the fire and cooks the marshmallow.
D.
Smoke and soot from the fire cause the marshmallow to brown.
Answer:
The answer is, C. Heat radiates from the fire and cooks the marshmallow.
Answer:
C Heat radiates from the fire and cooks the marshmallow.
Explanation:
Heat can be transferred through space through the process of radiation. The marshmallow is toasted because heat radiates from the fire and cooks the marshmallow.
a. Law of conservation of matter
i. What does the law say about matter?
I NEEEED HEEELPPEPEPEPEPEPPE
chemical equations for sodium sulphate, potassium sulphate, magnesium sulphate, calcium sulphate
Explanation:
2NaOH + H2SO4 --> Na2SO4 + 2H2O
2KOH + H2SO4 --> K2SO4 + H2O
Mg(OH)2 + H2SO4 --> MgSO4 + 2H2O
Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O
Which of the following are elements? (Select all that apply.)
KCl
Na
C
H2O
Answer:
Na(Sodium) and C(Carbon) only
Answer:
Na, C
Explanation:
1. KCl, or potassium chloride, is a combination of two elements- so it's a chemical compound.
2. Na, or sodium, can be found on the periodic table of elements. Therefore, it is an element.
3. C, or carbon, can also be found on the periodic table of elements. Therefore, it is an element.
4. H20, or water, is a combination of 2 hydrogen atoms that bonded into an oxygen atom. Combination of 2 or more elements is a chemical compound.
Therefore, the answers are Na and C.
Why does in the golf stream warm and provide it’s Rhode Island or Bangor Maine
How do I convert 50 years into seconds. Express your answer in scientific notation?
Answer: 15768 seconds
Explanation: (50 years) x (365 da/yr) x (86,400 sec/da)
= (50 x 365 x 86,400) seconds
= 1.5768 x 10⁹ seconds
2. The mass number tells the total number of
nucleus of an atom. These particles collectively are called
both are located in the nucleus.
Answer: The mass number tells the number of protons.
Explanation:
what is the ground-state electron configuration of a neutral atom of iron?
What’s a conjugative Bas of OH-
Answer:
the answer is O²- hopefully
Question 4 (1 point)
Model A
In the molecule above, the black circles are Carbon, the blue circles are Hydrogen
and the red circles are Oxygen. Which formula below is correct for this molecule?
C4H404
C2H402
Answer:
C2H4O2
Explanation:
Jus took USA Test prep test
Why do we fill balloons
with helium gas instead
of oxygen gas?
Answer:
Helium is less dense. Because helium is lighter than air, a helium balloon rises, just as an air bubble rises in more dense water
Explanation:
Also why not. It just is.
Answer:
This is due to the fact that helium has a lower density. A helium balloon rises like an air bubble in more dense water because helium is lighter than air. Another gas lighter than air is hydrogen, which is even lighter than helium.
Explanation:
Are bath bombs pure substances or mixtures
Answer:
Yes.
Explanation:
Bath bombs are usually made from three key ingredients: baking soda, citric acid and cornstarch, said Frankie Wood-Black, an instructor in chemistry at Northern Oklahoma College and an experienced bath-bomb maker. Often, bath bombs also include dyes and perfumes, and sometimes they have epsom salt.
Answer: yes
Explanation:
Assume trilobites went extinct 248 million years ago.
If a trilobite is found in a rock layer, what do you
know about the age of that rock layer?
Answer:
the rock layer is at least 248 million years old
Explore
What will the final temperature of the a block of brass with a mass of 30.6 g is at 87.4°C
after it's added to 62.3 g of water at 28.3°C. The specific heat of aluminum is 0.380
J/gºC.
The final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.
SPECIFIC HEAT CAPACITY:
The amount of heat absorbed or released by a substance can be calculated using the following formula:Q = m × c × ∆TQ(water) = - Q(metal)(m × c × ∆T) water = - (m × c × ∆T) metalAccording to this question;
METAL:
m = 30.6gc = 0.380 J/g°C∆T = T - 87.4°CWATER:
m = 62.3gc = 4.184J/g°C∆T = T - 28.3°C62.3 × 4.184 × (T - 28.3) = - {30.6 × 0.380 × (T - 87.4)}260.7T - 7376.8 = - {11.63T - 1016.3}260.7T - 7376.8 = -11.63T + 1016.3260.7T + 11.63T = 1016.3 + 7376.8272.33T = 8393.1T = 8393.1 ÷ 272.33T = 30.82°CTherefore, the final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.Learn more at: https://brainly.com/question/11194034?referrer=searchResults
Classify each of the following as abiotic or biotic.
A. Sand
B. Grass
C. Air
D. Rabbits and deer
E. Humans
Answer:
D.Explanation:
#I'm not sure#happy learningwhat happens when phosphorus forms an ion?
Answer:
Phosphorus would form a -3 charge
Explanation:
Phosphorus has five outer electrons that can bind atoms. As a result, Phosphorus forms a ion has a charge of -3.
Cómo se clasifica el aire?
Answer:
Not me
Explanation:
In Experiment 1, what volume did the propane gas occupy in the Erlenmeyer flask before the addition of any water?
This question is mentioning an experiment that is not being described about the volume of the propane gas in an Erlenmeyer before the addition of water.
In this case, since no information is given, it is possible to propose a suggested procedure of how to figure it out via gas laws, specifically, the ideal gas one, since no change is decribed before the addition of water:
[tex]PV=nRT[/tex]
Thus, you can solve for the volume, by dividing both sides by the pressure, so that you will get:
[tex]V=\frac{nRT}{P}[/tex]
Now, to ensure a correct calculation, make sure you have the moles (divide by the molar mass of propane, 44,1 g/mol, if you were given the grams), the temperature in K (add 273.15 if you have degree Celsius), the ideas gas constant as 0.08206 and the pressure in atm, in order to have consistent units.
If you need the volume in milliliters, you will need to multiply the previous answer by 1000 in order to perform the appropriate conversion.
Learn more:
https://brainly.com/question/15268548https://brainly.com/question/16521007Identify the location of oxidation in an electrochemical cell.
Answer:
Anode
Explanation:
Electrochemical cells have two conductive electrodes, called the anode and the cathode. The anode is defined as the electrode where oxidation occurs.
Does molasses need to be refrigerated after opening?
what is the accepted iupac name for the compound mg3p2?
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. The IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide. The oxidation state of phosphide is -3.
Therefore, the IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide.
To learn more about chemical compound, here:
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What was the effect of increasing the water's mass?
Matt is conducting an experiment where he compares the properties of water and
lemonade. The first stage of the experiment is focusing only on the physical properties of?
Answer:
sitric acid from lemon
Explanation:
there
The first stage of the experiment is focusing only on the physical properties of acidic property.
What is physical property?A physical property would be any quantifiable attribute whose value describes the condition of a physical system. Changes in a system's physical attributes are able to characterize its transitions between brief states. Physical attributes are sometimes known as observables.
Physical characteristics are frequently classified as intense or extensive. An intense property is independent of the system's size or extent, as well as the amount of material in the item, whereas an extended property has an additive link. The first stage of the experiment is focusing only on the physical properties of acidic property.
Therefore, the first stage of the experiment is focusing only on the physical properties of acidic property.
To learn more about physical property, here:
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Which of the following elements has the lowest first ionizition energy ?
1 ) Li
2)Mg
3) Na
4) Al
Answer:
I think Mg is correct I am not sure
If a car is moved 10 meters and 3 Newton's of force is needed to move the car, what amount of workhas
been done?
Work required = 30J
This is because work = F * x
F (Newton's force) = 3N
x (car moved) = 10m
Work = 3 * 10 = 30J