Help me with this please
Answer:
–253.5 °C
Explanation:
We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32
= 44 g/mol
Mass of CO₂ = 6 g
Mole of CO₂ =.?
Mole = mass / molar mass
Mole of CO₂ = 6 / 44
Mole of CO₂ = 0.136 mole
Next, we shall convert 225 mL to L.
1000 mL = 1 L
Therefore,
225 mL = 225 mL × 1 L / 1000
225 mL = 0.225 L
Next, we shall determine the temperature of the gas. This can be obtained as follow:
Pressure (P) = 0.855 atm
Volume (V) = 0.225 L
Number of mole (n) = 0.136 mole
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV =nRT
0.855 × 0.255 = 0.136 × 0.0821 × T
0.218025 = 0.0111656 × T
Divide both side by 0.0111656
T = 0.218025 / 0.0111656
T = 19.5 K
Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:
T(°C) = T(K) – 273
T(K) = 19.5 K
T(°C) = 19.5 – 273
T(°C) = –253.5 °C
Therefore, the temperature of the gas is –253.5 °C
please help!!
i’m trying to go to sleep
Answer:
4) C
6) true
I am not sure about 5th one
4) evaporation rate
5) acetone
6) true
Which of the following is an acceptable method to directly measure volume using the metric system?
A.
Using a balance scale to measure pounds.
B.
Using a graduated cylinder to measure liters.
C.
Using a graduated cylinder to measure gallons.
D.
Using a balance scale to measure grams.
Answer:
c
Explanation:
when measuring liquids you use liters
The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
What is proportion?The angles and relative measurements of a polished gem and the relationships between them are called proportion. Proportion is defined as equation in which two ratios are set equal to each other.
The relationship among the different things or parts with respect to comparative size, degree and number. There are several types of proportion and these are direct proportion, compound proportion, continued proportion, and inverse proportion.
Gravitational force is a force which act on objects which have a matter i.e a object which contains mass. Gravitational force is force which act between two objects which have a mass and both object are try to attract each other.
Therefore, The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
Learn more about proportion here:
https://brainly.com/question/2548537
#SPJ2
One is a negative environmental consequence of surface mining?
Answer:
Surface mining (also known as "strip mining") has the potential to significantly erode soil fertility, pollute waters, deplete underground water sources, scar or altar the landscape, damage roads, houses, and other buildings, and kill wildlife.
Which fraction contains the largest molecules?
A) diesel
B)gasoline
C)kerosene?
Answer:
Hydrocarbons
Hydrocarbons are chemical compounds that contain the elements carbon and hydrogen only. They are compounds that are obtained from the fossil fuel crude oil by a process called fractional distillation.
Fractional distillation
Fractional distillation separates the crude oil mixture into a number of smaller, different parts called fractions. The fractionating column is hot at the bottom and cool at the top. Substances with high boiling points condense at the bottom and substances with lower boiling points condense on the way to the top.
The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column. Each fraction contains hydrocarbon molecules with a similar number of carbon atoms, smaller molecules nearer the top and longer molecules nearer the base of the column.
Oil fractions
The diagram below summarises the main fractions from crude oil and their uses and the trends in properties. Note that the gases leave at the top of the column, the liquids condense in the middle and the solids stay at the bottom.
Explanation:
mark me as brainlist
The substances which are generally used to generate heat and light energy on burning are called fuels. The diesel fuel contains the largest molecules. Thus option A is correct.
What is Diesel?The diesel fuel which is also called the diesel oil is found to be a combustible liquid and it is produced from the fractions of crude oil. The diesel fuel is found to be less volatile than the gasoline.
The chemical composition of a diesel fuel is usually denoted as C₁₂H₂₄. Apart from the carbon and hydrogen atoms small amounts of 'S', 'N' and 'O' are also present in the diesel.
Here gasoline is a derivative product obtained by the fractional distillation of crude oil and it is generally used in passenger vehicles whereas kerosene is a highly flammable liquid obtained from the distillation of petrol and is less volatile than gasoline.
The gasoline contains only 4 to 12 'C' atoms per molecule and it is a lightweight hydrocarbon mixture. The number of 'C' atoms in kerosene ranges from 10 to 16 per molecule and the diesel fuel is known as the heavyweight hydrocarbon mixture with 8 to 21 'C' atoms per molecule.
Thus diesel fuel consists of larger hydrocarbon molecules than gasoline and kerosene.
Thus the correct option is A - Diesel.
To know more about Fuels, visit;
https://brainly.com/question/29526169
#SPJ6
Wat two common uses for Zinc???
Answer:
Zinc oxide is used in the manufacture of many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.
Explanation:
10. Aqua means "water" or "a light blue color." Marine refers to the sea. Use this information
to determine what the gemstone aquamarine might look like.
Determine what the gemstone aquamarine might look like?
Answer:
[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ♡ AQUAMARINE ♡ }} \mid}}[/tex]
=> The colour of this stone is usually a pale greenish blue, owing to the presence of iron impurities. Stones that are treated with heat look more blue than green. On the Mohs scale of hardness, aquamarine ranges between 7.5 and 8 making it a relatively hard gemstone.
=> The best way to identify a real aquamarine stone is by looking at its colour. In its natural form, they have a pale blue colour, which is similar to seawater. They may have a slight green or yellow tint as well. Naturally occurring gems have excellent clarity and transparency.
=> The hardness of the stone is another feature you can use to identify the stone. Aquamarine stones are hard and they don’t get scratches easily. However, they can easily scratch glass and other such surfaces. So, if you find visible scratches on the stone, rethink your decision to buy it.
=> Most faceted aquamarine stones are clean to the eye and clear of any inclusions. However, translucent and opaque aquamarine is also available. These are usually fashioned into cabochons or beads. In some cases, inclusions may appear as parallel tubes. Such stones can be crafted to show a cat’s eye. Stones with cat’s eye and star effect are rare and highly priced.
In balancing a chemical equation, which of the following are you allowed to do?
A) change coeffecients
B) change superscripts
C) change subscripts
D) add new substances
Answer:
Change Coefficients
Thank you
If a 0.7 M solution of Ca(OH)2 dissociates completely in water, what is the
final [OH-]?
Answer:
1.40 M [OH⁻]
Explanation:
This compound dissociates into 3 ions, but since we are asked about [OH⁻], it's only 2. Therefore, multiply the molarity of the solution by the number of ions that [OH⁻] dissociates into:
2 × 0.70 M = 1.40 M
Hope this helps! Sorry that you got a link. Those are getting really annoying
The temperature of 170 g of a material decreases by 20.0⁰C when it loses 3050 J of heat. What is its specific heat
Answer:
0.897 J/g.⁰C
Explanation:
Given the following data:
m = 170 g (mass)
ΔT = 20.0⁰C (change in temperature)
q = 3050 J (amount of heat)
The amount of heat (q) is calculated as follows:
q = m x Cp x ΔT
Thus, we introduce the data in the mathematical expression to calculate the specific heat (Cp):
Cp = q/(m x ΔT) = 3050 J/(170 g x 20.0⁰C) = 0.897 J/g.⁰C
What are three similarities between biotic and abiotic factors?
i will give brainliest if you help me out !!!
SOMEONE HELP PLEASE !!
Which is not an electrolyte
1. Ionic salt
2. Acid
3. Base
4. Water
PLEASE HELP ME
salt is not because it gets u dehydrated
R is the ideal gas constant. We know it is equal to 0.0821. What is the unit for R?
L•atm/mol K
L•atm/mol · °C
mL • atm/mol. K
L• kPa/mol - K
Answer:
A. L•atm/mol K
Explanation:
The ideal gas law equation is given as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant
T = temperature (K)
As rightly stated in this question, R is the ideal gas constant, which can be different depending on the unit of the other components.
At STP;
V = 22.4L
P = 1 atm
T = 273 K
n = 1 mole
Hence, using PV = nRT
R = PV/nT
R = 1 × 22.4/1 × 273
R = 22.4/273
R = 0.08205
Approximately, R = 0.0821
With the units of P as atm, V as L, n as mol and T as K; R will be 0.0821 L•atm/mol K
The following graph shows a decay chain. Which part of the decay will take the most time? the decay of U-238 to Th-234, the decay of Th-234 to Ra-226, the decay of Ra-226 to Po-214, the decay of Po-214 to Pb-206
A- the decay of U-238 to Th-234
right on edge 2021
Answer:
A) the decay of U-238 to Th-234
:)
Explanation:
. What is the molarity of 5.30 moles of NaCl dissolved in 0.400 L of solution?
Answer:
13.25 M
Explanation:
Molarity is moles over liters so simply plug your values in as such:
5.30 mol ÷ 0.400 L = 13.25 M
identify the reaction of S8+F2-->SF8
The given reaction is a combination / synthesis reaction, since two reactants combine to form a single product
Identify the gas law that applies to the following scenario: If a gas in a closed container is pressurized from 18.0 atm to 14.0 atm and its original
temperature was 35.0°C, what would the final temperature of the gas be?
Charles' Law
O Avogadro's Law
O Boyle's Law
O Gay-Lussac's Law
Answer:
Gay-Lussac's Law
Explanation:
The pressure is directly proportional to the absolute temperature under constant volume. This states the Gay-Lussac's law. The equation is:
P1T2 = P2T1
Where P is pressure and T absolute temperature of 1, initial state and 2, final state of the gas.
That means the right option is:
- Gay-Lussac's Law
Is oil a reasonable energy source? Why or why not?
Answer:
No, it is not.
Explanation:
Oil is a non-renewable source of energy. ... Burning oil can pollute the air. Much of our oil has to be imported and it is becoming more and more expensive as reserves reduce and imports increase. Producing electricity from crude oil is expensive compared to other fossil fuels such as coal or gas.
*You Can put this in your own words
What is the longest compound name? How many atoms are in the compound?
Answer: its called titin, but it has a much much longer name that i couldn't find in full
Explanation: C169,719H270,466N45,688O52,238S911
How many atoms of hydrogen are in 10.25 grams of
water?
binigyan ang isang liham ng pasasalamat at gagawin ko rin siya ng kabutihan sa ibang pagkakataon
Answer:
what language do you speak?
6
Use the image of an element square to answer the following
questions:
C
Carbon
12.01
What does the 6 in the upper left
represent?
What does the 12.01 represent?
Answer:
the 6 stands for the atomic number
the 12.01 stands for the atomic mass
Valerie creates a model using three different rocks. The rocks are classified as igneous, metamorphic, and sedimentary.
Which property does Valerie use for classification purposes?
color
formation
shape
texture
The rocks are classified as igneous, metamorphic, and sedimentary use the formation for classification purposes.
What are the 3 types of rocks existing on earth?The outermost of them, called the crust, is composed of three types of rocks: magmatic, sedimentary and metamorphic. They are defined through the origin of several minerals and can be characterized with chemical composition, texture or shape, but the most used specification is based on composition.
The property does Valerie use for classification purposes is formation.
See more about rocks at brainly.com/question/19930528
#SPJ5
Wat two common uses for Sulfur??
Answer:
It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc...
Explanation:
It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc..
What equation is used to calculate atomic mass?
WARNING!!!! NO LINKS OR YOU WILL BE REPORTED!!!!
Answer:
Average atomic mass = f1M1 + f2M2 +… + fnMn where f is the fraction representing the natural abundance of the isotope and M is the mass number (weight) of the isotope. The average atomic mass of an element can be found on the periodic table, typically under the elemental symbol.
What is the volume, in liters, of 573 g of SO2 gas at STP?
Answer:
Explanation:
The answer is 202
What is the volume of 16.0 g of SO2 (g) at STP?
Answer:
Explanation:
At STP 1 mole of an ideal gas = 22.4 L.
Assuming SO2 (sulfur dioxide) acts as an ideal as, we have 16 g SO2 x 1 mol/64 g = 0.25 moles SO2
0.25 moles x 22.4 L/mole = 5.6 liters
What type of reaction is the following: Ca + S --> CaS
Answer:
Combination reaction is taken during this reaction
Is it possible to be 100% certain the plants or seeds would or would not survive in a new location? Why or why not?
Answer:
It would be half an half because it depends on the plant and location
Explanation:
It would be half an half because it depends on the plant and location.
What are Plants?The kingdom Plantae contains eukaryotes that are mostly photosynthetic.
Algae and fungi were once included in the plant kingdom, which historically included all living creatures that were not animals; however, all modern definitions of Plantae omit these organisms along with some algae and prokaryotes (the archaea and bacteria).
Green algae and Embryophyta are included in the concept of plants as belonging to the clade Viridiplantae (Latin for "green plants"), which is sister to the Glaucophyta (land plants).
Therefore, It would be half an half because it depends on the plant and location.
To learn more about plants, refer to the link:
https://brainly.com/question/22167412
#SPJ2
A gas is collected at 25.0 °C and 755.0 mm Hg. When the temperature is
changed to 0 °C, what is the resulting pressure?
Answer:
691.7 mmHg is the resulting pressure
Explanation:
Tha Gay-Lussac's law states that the pressure of a gas is directly proportional to its absolute temperature under constant volume. The equation is:
P1T2 = P2T1
Where P is pressure and T asbolute temperature of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
T1 = 273 + 25 = 298K
P1 = 755.0mmHg
T2 = 273 + 0 = 273K
P2 = ?
755.0mmHg*273K = P2*298K
691.7 mmHg is the resulting pressure