Hard water contains relatively large concentrations of
A. Magnesium ions
B. Calcium ions
C. Iron ions
D. All of these ions
Answer:
I think the answer is All of these ions
What is the pressure (in atm) in a 5.00 L tank with 9.00 grams of oxygen gas at 350 K?
Answer:
1.61 atm
Explanation:
Using general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
From the information provided in this question,
V = 5.00L
T = 350K
mass of O2 = 9.00g
Using mole = mass/molar mass
Molar mass of O2 = 16(2) = 32g/mol
mole = 9/32
mole = 0.28mol
Using PV = nRT
P = nRT/V
P = 0.28 × 0.0821 × 350/5
P = 8.0458/5
P = 1.609
Pressure = 1.61 atm
The pressure of the oxygen gas at the given temperature and volume is 1.61 atm.
The given parameters;
volume of the gas, V = 5 Lmass of the oxygen gas, m = 9 gtemperature of the gas, T = 350 KThe number of the moles of the given gas is calculated as follows;
[tex]moles = \frac{m}{M} \\\\moles = \frac{9}{32} \\\\moles = 0.28 \ mol[/tex]
The pressure of the gas is calculated as follows;
[tex]PV = nRT\\\\P = \frac{nRT}{V} \\\\P = \frac{0.28 \times 0.0821 \times 350}{5} \\\\P = 1.61 \ atm[/tex]
Thus, the pressure of the oxygen gas at the given temperature and volume is 1.61 atm.
Learn more here:https://brainly.com/question/21912477
Photosynthesis in a plant is an example of which characteristic of living things?
1. Reproduction
2. Response to the environment
3. Growth and development
4. Ability to obtain and use energy
Answer:
4. Ability to obtain and use energyA 16.4 g sample of calcium chloride is dissolved in enough water to make 750.0 mL of solution. Calculate the molarity of calcium chloride in this solution. plz help!!!
The molarity is an important method to calculate the concentration of a solution. The molarity of calcium chloride of 16.4 g in 750.0 mL of solution is 0.196 mol L⁻¹.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is mainly employed in calculating the molarity of a binary solution. It is represented as 'M' and unit is mol L⁻¹.
The equation used to calculate the molarity is given as:
Molarity = Number of moles of the solute / Volume of the solution in litres
Molar mass of CaCl₂ = 110.98 g/mol
Given mass = 16.4 g
Number of moles = 16.4 / 110.98 = 0.147
750.0 mL = 0.75 L
Molarity = 0.147 / 0.75 = 0.196 mol L⁻¹
Thus the molarity is 0.196 mol L⁻¹.
To know more about molarity, visit;
https://brainly.com/question/16727614
#SPJ2
Convert 678.92 cm into meters
Answer:6.7892 meters
Explanation:
How is this effect of dissolved
substances important in nature?
Explanation:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
In the following reaction:
C6H6 + Br2 → C6H5Br + HBr
Assume 1.25 moles of C6H6 react with sufficient bromine, how many moles of C6H5Br should form?
2.50 mol
5.00 mol
0.625 mol
1.25 mol
Answer:
1.25mol
Explanation:
The equation you gave is balanced and everything is in a 1:1:1:1 ratio. Because there is excess bromine, the reaction can proceed until completion which will give you 1.25 mol C6H5Br
Part A
Choose the paramagnetic species from below.
O He
O Te
O T14+
O All of the above are paramagnetic.
None of the above is paramagnetic.
Answer:
o He
Explanation:
basyshsiz0qnshshhsjzz
help me please i beg u
Answer:
none of the above
Explanation:
How many grams of NaOH (MW = 40.0) are there in 500.0 mL
of a 0.175 M NaOH solution?
A) 3.50
B) 114
C) 14.0
D) 2.19x10
Answer:
3.5
Explanation:
500*0.175= 8.75 *40/1000=3500/1000=3.5
Answer:
3.50 grams
Explanation:
Mastering chem
what is the last element in the periodic table?
Answer:
Ununoctium
Explanation:
It's at the very end of the periodic table
Answer:
Ununoctium
Explanation:
Ununoctium is the last chemical element int the periodic table.
assign an oxidation number to each element in the following species. H2O
Answer:
the oxidation number of hydrogen is +2, while oxygen is -2
An __________ includes all living and non-living things in an environment.
Answer:
an ecosystem
Explanation:
it compromises of living and non living things in an environment.
3
1 point
The formula for acetic acid is HC H302
What is the percent composition of carbon in acetic acid?
molar mass of the element you need to find a percentage of
molar mass of the entire substance
40.0%
20.0%
33.3
41.4%
Previous
why does a mole of silicon weigh a different amount than a mole of carbon?
Answer:
[tex]\boxed {\boxed {\sf Different \ amount \ of \ protons, neutrons, \ and \ electrons}}[/tex]
Explanation:
Remember that a mole is equal to Avogadro's number: 6.022*10²³ atoms. Also, remember that an atom is made up of protons, neutrons, and electrons. Each element has a different amount of each.
If an element has more of these particles in 1 atom, then the atomic mass will be greater, ultimately making the molar mass (mass of 1 mole) greater.
Silicon has 14 protons, electrons, and neutrons, making its atomic mass 28.085 amu and its molar mass 28.085 grams. However, carbon only has 6 of each particle, so its atomic mass is smaller at 12.011 amu and molar mass is 12.011 grams.
Helpppp me pleaseeee now I’ve been struggling so bad w this
Answer:
I don't know what the passage says, but I feel like the most logical conclusion is D or the last one.
Explanation:
Answer:
D! Hope this helps! Figured id help with all of ur questions!
Explanation:
Im a wiz at science! ;)
Consider this chemical equation:
2AgNO3(aq) + Cu(s) → Cu(NO3)2(aq) + 2Ag(s)
Which substances dissolve in solution? Select all
that apply.
AgNO3
Cu
Cu(NO3)2
Ag
Answer is:AgNO3 and Cu(NO3)2
Answer:
the answer is very correct as AgNO3 and Cu(NO3)2
Answer:
A,C
Explanation:
the person above me is correct
16. What is the typical diameter of an atom?
A. | 10-14 m
B. I x 10-12 m
C. | 10-10 m
D. | x 10-8 m
HELPP PLSS
how many moles are in 83 particles of sodium chloride?
Answer:
there are 1.4201927800478769 moles in 83 particles of sodium chloride. or 1.42 for short.
Explanation:
Determine the number of atoms in 3.14 g gold
Conduction is the transfer of energy by the movement of currents. ture or false
conduction is the transfer of energy by the movement of currents(it is true)
Answer:
false
Explanation: Its actually Convection
Please please help me
Answer:
I agree with Omar because it depends on what the charge of the object and magnet is. If the magnet is negative and the object is positive, they will pull together. If the magnet is negative and the object is negative then they will pull apart.
Explanation:
A student pours 800.0 mL of a 3.000 molar solution of sodium hydroxide into a 2.00 liter volumetric flask and fills the flask up with water. What is the new molarity of the solution?
5 points
12.00 M
1.20 M
14.00 M
0.0750 M
A gas has a volume of 590 mL at a temperature of –55.0°C. What The temperature be if the volume expands to 15L at constant pressure?
Answer:
5542.37 K
Explanation:
Given that,
Initial volume, V₁ = 590 mL
Initial temperature, T₁ = -55°C = -55 + 273 = 218 K
Final volume, V₂ = 15 L
We need to find the final temperature of the gas. The relation between the volume and the temperature is given by :
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Where
T₂ is final volume of the gas
Put all the values in above relation,
[tex]T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{15\ L\times 218\ K}{590\times 10^{-3}\ L}\\\\T_2=5542.37\ K[/tex]
So, the required temperature is equal to 5542.37 K.
Please Answer Giving Brainleist
What gas in the air is used by plants to make their own food?
A) Nitrogen
B) Water vapor
C) Carbon dioxide
D) Oxygen
Answer:
C) Carbon dioxide is the answer.
Answer:
C. Carbon Dioxide
Carbon is absorbed by plants and chemically converted to oxygen via photosynthsis.
Hope this helps!
why pie bond are not perticipate in hybridaization
aluminium extraction from its ore
Look at the diagram below.
Ray 1 from the Sun moves through air and falls on the surface of a lake. Ray 2 is a ray which travels from the surface of the lake at the point Ray 1 strikes the lake, and moves towards air. Ray 1 and Ray 2 make the same angle with the surface of the lake. Ray 1 bends towards the vertical when it enters the lake as Ray 3
Which statement is true?
Ray 2 is the refracted ray.
Ray 3 is the reflected ray.
Ray 1 and Ray 2 make the same angle with the vertical line.
Ray 1 and Ray 3 make the same angle with the vertical line.
Answer:
3rd statment
Explanation:
ray 1 and 2 are same vertical line
Answer: C: Ray 1 and Ray 2 make the same angle with the vertical line.
Explanation:
For the reaction shown, drsw the major(s) expected product.
Answer:
2
Explanation:
What is the percent yield of LiCl if I produced 30.85g LiCl and my theoretical yield was calculated to be 35.40g LiCl?
Answer:
87.15%
Explanation:
To find percent yield, we can use this simple equation
[tex]\frac{Actual}{Theoretical} *100[/tex]
Where "Actual" is the amount in grams actually collected from the reaction, and "Theoretical" is, well, the theoretical amount that should have been produced.
They give us these values, so to find the percent yield, just plug the numbers in.
[tex]\frac{30.85}{35.40} *100\\\\ =87.15[/tex]
So, the percent yield is 87.15%
An easy trick to remember how to do this is just to divide the smaller number by the bigger number and move the decimal back two places. If you have a percent yield greater than 100%, something is wrong in the reaction.