The number of moles of K+ that are on 750 mL of the patient's blood is = 3.375moles.
How to calculate blood potassium levelsSince mmol is one-thousandth of a mole also a mEq is one-thousandth of an equivalent. Therefore both can be used interchangeably.
That is 4.5mEq/L of potassium = 4.5mmol/L
If 4.5 moles = 1000ml ( 1 liter =1000ml)
x mole = 750 ml
Make x the subject of formula,
x mole = 750 × 4.5 / 1000
= 3,375/1000
= 3.375moles
Therefore, the number of moles of K+ that are on 750 mL of the patient's blood is = 3.375moles.
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15) A 12.0 g sample of helium gas occupies a volume of 12.6 L at a certain temperature and
pressure. What volume does a 24.0 g sample of neon occupy at these conditions of
temperature and pressure?
The required volume of sample of neon occupy at these conditions of temperature and pressure is 25.2L.
How do we convert grams into moles?Mass (W) in grams of helium gas will be converted into moles (n) by using the below equation:
n = W/M, where
M = molar mass = 4g/mol
Initial moles of helium gas:n = 12g / 4g/mol = 3 mol
Final moles of neon gas:n = 24g / 4g/mol = 6 mol
And for this question as pressure and temperature for both the conditions is constant so ideal gas equation becomes:
V₁/n₁ = V₂/n₂, where
V₁ = initial volume = 12.6 L
n₁ = initial moles = 3 mol
V₂ = final volume = ?
n₂ = final moles = 6 mol
On putting these values, we get
V₂ = (12.6)(6) / (3) = 25.2 L
Hence required volume of neon gas is 25.2 L.
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Which of the following is a correctly balanced reaction equation?
-CaCl2+ NaOH -> NaCl2+ Ca(OH)
-CaCl2 + 2NaOH -> 2NaCl + Ca(OH)2
-CaCl2 + NaOH -> NaCI + Ca(OH)2
-2CaCl2 + 4NaOH -> 4NaCl + 2Ca(OH)2
Answer:
CaCl2 + 2NaOH -> 2NaCl + Ca(OH)2
Explanation:
What causes radiation heating?
A. Heat transfer through electromagnetic waves
B. Heat transfer through moving gases or liquids
C. Heat transfer through differences in temperatures
D. Heat transfer through contact between molecules
Answer:
No. A
Explanation:
cause due to the friction between both molecules heat is produced rapidly.
The answer is A) Heat transfer through electromagnetic waves.
Cause due to the friction between both molecules heat is produced rapidly.
What radiation does do to a person?Radiation can harm the DNA in our cells. Excessive doses of radiation can motivate Acute Radiation Syndrome (ARS) or Cutaneous Radiation accidents (CRI). High doses of radiation could also cause most cancers later in life.
Radiation is a mutagen, which finally can lead to cancer. Radiation can either kill cells or harm the DNA within them, which damages their capacity to reproduce and might in the end cause cancer. whilst radiation is a gift, excessive electricity debris bypasses your body.
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How many J of energy would you need in order to heat 252 grams of
iron from 305 K to 445 K?
S(Fe) = 0.450 J/g*K
Answer:
16128 J
Explanation:
Data:
m (mass) = 252 gTi (Temperature initial) = 305 KTf (Temperature final) = 445 Kc (specific heat) 0.450 J/g*KWanted:
q (heat) = ? JSolution:
q = mCΔTq = (256 g)(0.450 J/g*K) (445 K - 305 K)q = (256 g)(0.450 J/g*K) (140 K)q = 16128 JNote:
The answer is not in a correct significant figure. So, make sure you have a correct significant figure.
How are owls compared to wolfs?
Answer:
They are both very aggressive animals! And amazing hunters at night!
Explanation:
I hope this helps! :)
Answer:
Owl and wolfs dodnt really have simuarities tbh lol, but they are both fercious animals :)
Explanation:
If 23.5 g of ammonia (NH3) is dissolved in 1.0 L of solution, what is the molarity?
Answer:
1.38 M
Explanation:
Need to use the Molarity equation M=n/L
23.5g/ 17.031g/mol NH3 = 1.38 moles
1.38 moles/ 1.0 L = 1.38 M
An investigator makes a graph of the loudness of a vibrating string over time:
The investigator can reach which conclusion about the different numbered times?
A
The string vibrated more intensely at time 3 than at time 2.
B
The string vibrated more intensely at time 2 than at time 3.
C
The string vibrated more intensely at time 4 than at time 2.
D
The string vibrated more intensely at time 1 than at time 2.
Answer:
A because time 3 is the highest peak than time 1-4 (-3)
Answer:
A. The string vibrated more intensely at time 3 than at time 2.
Explanation:
Which of the following atoms has the least metallic character?
Answer:
The least metallic or most non-metallic element is fluorine.
Explanation:
hope this helps
pls mark brainliest
What is the pH of a 1 x 10^-5 M [OH-] solution
a. 3
b. 9
c. 5
d. 11
Answer:
I think this will help you
Explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
Water exists as a liquid in what temperature range?
Answer: between 0 degrees Celsius and 100 degrees celsius
- 5. Describe the general trend in atomic radil across a row of the periodic table.
Answer:
Across a row, atomic radii decreases.
Explanation:
It decreases because nuclear charge increases across a row, electrons are added to the same shell and shielding remains constant. Therefore the outer electrons are more attracted to the nucleus making the atom smaller.
At what temperature does the motion of the particles of an ideal gas cease?
Answer:The temperature at which the motion of particles theoretically ceases is 00A or absolute zero, Absolute 00 is the definition of 00 on the Kelvin and Rankine temperature scales.
Explanation:
The largest mass of silver chloride precipitated is when excess silver ions are added to
A 25.0cm3 of 0.80M hydrochloric acid.
B 30.0cm3 of 0.30M iron(III) chloride solution.
C 50.0cm3 of 0.20M magnesium chloride solution.
D 50.0cm3 of 0.50M sodium chloride solution.
answer is B but have no clue why!
The largest mass silver chloride is precipitated when excess silver ions are added to 30.0cm3 of 0.30M iron(III) chloride solution.
What is a precipitation reaction?A precipitation reaction is a reaction in which an insoluble substance is obtained when two solutions are mixed together as a result of one of the products of the reaction being insoluble in water.
Silver chloride is an insoluble salt that will precipitate when a single silver salt is added to a soluble chloride salt.
In the above, the largest mass silver chloride is precipitated when excess silver ions are added to 30.0cm3 of 0.30M iron(III) chloride solution since iron (iii) chloride is a weak electrolyte.
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Molarity by dilution. Show steps
Answer:
[tex]V_2 = 0.0167L = 16.7 mL[/tex]
Explanation:
[tex]c_1 V_1 = c_2 V_2\\2.0 M \cdot 0.100L = 12M \cdot V_2\\V_2 = \frac{2.0M \cdot 0.100L}{12M} = 0.0167L = 16.7 mL[/tex]
If the reaction of 5.87 moles of potassium with excess hydrobromic acid was able to produce 2.49 mol H2, what is the percent yield of hydrogen gas? (3 points)
Unbalanced equation: K + HBr yields KBr + H2
1. 14.6%
2. 29.2%
3. 42.4%
4. 84.8%
Answer: 2. 29.2%
Explanation:
State the second law of thermodynamics in words and express it mathematically defining all terms. (6 marks)
The second law of thermodynamics states, in part, that "every spontaneous activity in any isolated system always leads in a rise in the entropy of that system." Because the universe is an isolated system, this assertion may be represented mathematically as follows: (1.6-2)
What is the coordination number of the chromium ion in the complex ion [Cr(NH₃)₄Cl₂]⁺?
Answer:
6
Explanation:
Count the number of species that are bonded to chromium in this complex ion. There are four ammonia molecules and two chlorine atoms bonded to chromium. This yields a coordination number of 6.
The co-ordination number of chromium ion in complex [Cr(NH₃)₄Cl₂][tex]^+[/tex] is six as there are four ammonia molecules and 2 chlorine molecules bonded to chromium which gives total co-ordination number of 6.
What are ions?An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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Under business as usual (the starting scenario of DOCs), which of the following are the three current biggest sources of electrical energy? Select 3.
Question 2 options:
Nuclear Power
Hydroelectric
Natural Gas
Coal Power
Answer:
nuclear power, natrual gas , coal power
Explanation:
i took the quiz.
A thermometer at room temperature is placed in cup of hot tea. What happens to the molecular kinetic energy of the molecules in the thermometer?
stays the same
•
decreases
increases
Answer:
increases
Explanation:
The energy increases (temp increases)....the molecules become further apart and the liquid expands up the graduated scale of the thermometer to show temp
Which of the following could cause a change in state from a liquid to a solid?
Increases the pressure l
_____________________
Removing Energy l
What is the formal charge of F in CF4?
Answer:
zero
Explanation:
Answer:
Zero.
Explanation:
The overall formal charge in CF4 is zero.
Determine the rate of a reaction that follows the rate law: rate = k[A]^m[B]^n, where k = 1.5
why does water boil at 100° Celsius while hydrogen sulphide boils at 58
degrees Celsius?
When vapor pressure reaches an equivalent value to the surrounding air pressure, the liquid(in this case water) will boil. When at sea level, vapor pressure is equal to the atmospheric pressure which is at 100 degrees celsius. Water has a high boiling point because water requires more energy to break its hydrogen bonds before it can boil to high.
Which type of precipitation is shown in the diagram below? How does this precipitation form?
Answer:
precipitation means water droplets may grow as a result of additional condensation of water vapor when the particles collide. If enough collisions occur to produce a droplet with a fall velocity which exceeds the cloud updraft speed, then it will fall out of the cloud as precipitation.
Explanation:
i knew this alr
The percentage by mass of calcium carbonate in eggshell was determined by adding gues
hydrochloric acid to ensure that all the coloum carbonate had reacted. The eness is left we
then titrated with aqueous sodium hydroxide,
(a) A student added 27.20 crn' of 0.200 mol dm * HCI to 0.188 g of eggshell. Calculate the
amount, in mol of HCI added,
(b) The excess and requires 23,80 cm' of 0.100 mol dm Noow for neutralization, Caliste
the amount, in mol, of acid that is in excess,
(0) Determine the amount, in mol, of HCl that reacted with the caldum carbonate in the
eggshell
(d) State the equation for the reaction of HCl with the calcium carbonate in the eggshell.
(e) Determine the amount, in mol, of calcium carbonate in the sample of the eggshell
,
(0) Calculate the mass and the percentage by mass of caldur carbonate in the eggshell
sample
(9) beduce one assumption made in arriving at the percentage of caldur carbonate in the
eggshell sample.
Explanation:
please see images... hope this helps!
(d) What is the mass percentage of water in CdCl2.4H2O?
The mass percentage of water (H₂O) in cadmium chloride tetra hydratesolution is equal to the 28.2%.
How do we calculate mass percentage?Mass percentage of any substabce present in any solution will be calculated as:
Mass percent = (Mass of substance/Total mass of solution)×100%
According to the question,
Mass of water (H₂O) = 18.02 g/mol
Mass of solvent (CdCl₂.4H₂O) = 183.32 + 4(18.02) = 255.4 g/mol
On putting values, we get
Mass percent = (18.02 / 255.4) × 100% = 28.2%
Hence mass percent of water is 28.2%.
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I need help finding both conjugate acid and base
How many electrons are unpaired in the orbitals of carbon?
Answer:
2 unpaired electrons
Explanation:
Carbon's bonding state electron configuration is 1s2 2s1 2s1 2p1 2p1. So, there are 4 unpaired electrons in the orbitals of carbon in bonding state.
hope this helps
An unknown organic compound composed of carbon, hydrogen and oxygen was analyzed and found to be 60% C, 8% H and the rest being oxygen Its molecular weight is found to be 300g What is its molecular formula?
Identify the tectonic plate boundaries.
convergent plate boundary and divergent plate boundary an island arc oceanic spreading ridge a trench and continental crust
Divergent boundaries and convergent boundaries are the opposite processes that occurs in the tectonic plates.
Difference between Divergent and convergent boundariesDivergent boundaries are the regions where new crust is formed when the plates pull away from each other while on the other hand, Convergent boundaries are the regions where crust is destroyed when one plate dives over another.
So we can conclude that Divergent boundaries and convergent boundaries are the opposite processes that occurs in the tectonic plates.
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