Answer:
Because carbohydrates are energy
Explanation:
Carbohydrates is best best nutrient for energy, turning into energy as soon as they are eaten. A rickshaw puller most likely needs quite a bit of energy to pedal all day without getting tired, so that's why they eat a carbohydrate rich diet.
How many grams of HCL are needed to make 500.0 mL of a 0.100 M solution?
Answer:
1.44 g
Explanation:
The problem gives you the molarity and volume of the target solution, so right from the start you know that you can use that information to determine the number of moles of hydrochloric acid that it must contain.
So, molarity measures a solution's concentration in terms of how many moles of solute, which in your case is hydrochloric acid, you get per liter of solution.
A
0.158 M
hydrochloric acid solution contains
0.158
moles of hydrochloric acid for very liter of solution. Since you're dealing with
250 mL
, the equivalent of
1
4
th
of a liter, your solution will contain
250
mL
⋅
1
L
10
3
mL
⋅
0.158 moles HCl
1
L
=
0.0395 moles HCl
Now that you know how many moles of hydrochloric acid are needed to prepare your solution, use the compound's molar mass to convert this to grams
0.0395
moles HCl
⋅
36.46 g
1
mole HCl
=
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
1.44 g
a
a
∣
∣
−−−−−−−−−−
Explanation:
Please brainliest.
25 g of 116oC steam are bubbled into 0.2384 kg of water at 8oC. Find the final temperature of the system.
Answer: The final temperature of the system will be [tex]13.14^0C[/tex]
Explanation:
[tex]heat_{absorbed}=heat_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex] .................(1)
where,
q = heat absorbed or released
[tex]m_1[/tex] = mass of steam = 25 g
[tex]m_2[/tex] = mass of water = 0.2384 kg = 238.4 g (1kg=1000g)
[tex]T_{final}[/tex] = final temperature = ?
[tex]T_1[/tex] = temperature of steam = [tex]116^oC[/tex]
[tex]T_2[/tex] = temperature of water = [tex]8^oC[/tex]
[tex]c_1[/tex] = specific heat of steam = [tex]1.996J/g^0C[/tex]
[tex]c_2[/tex] = specific heat of water= [tex]4.184J/g^0C[/tex]
Now put all the given values in equation (1), we get
[tex]25g\times 1.996J/g^0C\times (T_{final}-116)=-[238.4g\times 4.184J/g^0C\times (T_{final}-8)][/tex]
[tex]T_{final}=13.14^0C[/tex]
Therefore, the final temperature of the system will be [tex]13.14^0C[/tex]
Need help to find the molarity. Please help!
Answer:
0.092M
Explanation:
Molarity of glucose solution = number of moles ÷ volume
According to this question, 12.5g of glucose (C6H12O6) is dissolved in enough water to make 750mL of solution.
Molar mass of glucose (C6H12O6) = 12(6) + 1(12) + 16(6)
= 72 + 12 + 96
= 180g/mol
mole = mass/molar mass
mole = 12.5/180
mole = 0.069mol
Volume of solution = 750mL = 750/1000 = 0.750L
Hence, molarity = n/V
Molarity = 0.069 ÷ 0.750
Molarity = 0.092M
in an ionic bond:
A. both atoms share their electrons.
B. one atom accepts electrons from another.
C. The atoms attract each other but their electrons do not interact.
D. The atoms swap electrons
If 1.00 L of gas at 1.00 atm of pressure is compressed to a volume of 0.473 L, what is the new pressure of the gas?
Which gas law formula should you use to solve this problem?
-Avogadro’s Law
-Boyle’s Law
-Charles’ Law
Answer:
2.114 atm
Explanation:
Since it is just pressure and volume, use Boyle's Law
P1V1 = P2V2
Then plug in numbers
(1 atm)(1 L) = P2(.473 L)
P2 = 2.114 atm
The half-life of radium-226 is 1,600 years. It decays into radon-222. What fraction of the original amount of radium-226 in a sample will still be radium
after 8,000 years?
A.1/8
B.1/4
c.1/32
D.1/16
Answer:
Your answer will be C. 1/32
Answer:
C. 1/32
Explanation:
If I contain 2.5 moles of gas in a container with a volume of 45 liters and at a temperature of 261 K, what is the pressure inside the container in atmospheres?
Answer:
The correct answer is "[tex]1.21\times 10^5 \ Pa[/tex]".
Explanation:
The given values are:
Number of moles,
n = 2.5 moles
Volume,
V = 45 liters
Temperature,
T = 261 K
As we know,
⇒ [tex]PV=nRT[/tex]
or,
⇒ [tex]P=\frac{nRT}{V}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{2.5\times 0.0821\times 261}{45}[/tex]
⇒ [tex]=\frac{53.57}{45}[/tex]
⇒ [tex]=1.19 \ atm[/tex]
On converting it in Pa, we get
⇒ [tex]=1.19\times 1.01325\times 10^5[/tex]
⇒ [tex]=1.21\times 10^5 \ Pa[/tex]
it takes 125.0ml of 3.5M hydrobromic acid to neutralize 75.0ml of lithium hydroxide. what is the concentration of lithium hydroxide
Answer:
5.83 M
Explanation:
3.5 M * 125.0 ml = M₂ * 75.0ml
437.5 M.ml = M₂ * 75.0 ml
M₂ = 437.5 M.ml / 75.0 ml
M₂ = 5.83 M
4. Nowadays, clinical thermometer is replaced by digital thermometer,why?
Answer:
Digital thermometer are used these days instead of clinical thermometers because: Digital thermometers are designed to be more accurate. Most digital thermometers have digital screening which extract temperature of wherever you are measuring.How many grams of NaOH are needed to make 2.00 L of a 0.200 M solution?
Answer: 16.0 g
Explanation: M(NaOH) = 39.998 g/mol. N = m/M = cV
Mass m = McV = 39.998 g/mol·0.200 mol/l · 2.0 l = 16.0 g
Some of the glucose required for cellular respiration in humans is obtained by??
Answer:
.
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by external food source which are rich in carbohydrates.
What is cellular respiration?Cellular respiration is the process in which cells combines the oxygen with the foodstuff molecules, and converting the chemical energy into life sustaining activities as energy.
In the human body, we get the glucose for the cellular respiration from the external food source which are riched in carbohydrates, starch, etc. After converting the chemical energy to glucose then oxygen is absorbed in the lungs and circulate the blood through out the body by red blood cells.
Hence, we get glucose from food source.
To know more about cellular respiration, visit the below link:
https://brainly.com/question/2809259
someone please help meeeee, i’ll help u if u help meeeeeeeeee :)
Dinitrogen oxide (N2O) gas was generated from the thermal decomposition of ammonium nitrate and collected over water. The wet gas occupied 123 mL at 21◦C when the atmospheric pressure was 760 Torr. What volume would the same amount of dry dinitrogen oxide have occupied if collected at 760 Torr and 21 ◦C? The vapor pressure of water is 18.65 Torr at 21◦C. Answer in units of mL.
Answer:
119.98 mL
Explanation:
Initial volume V1 = 123 ml
Initial temperature = T1 = 21◦C + 273 = 294 K
Initial pressure P1 = 760 Torr - 18.65 Torr = 741.35 Torr
Final volume V2= ???
Final temperature = T2= 21◦C + 273 = 294 K
Final pressure P2 = 760 Torr
From;
P1V1/T1= P2V2/T2
P1V1T2 = P2V2T1
V2 = P1V1T2/P2T1
V2= 741.35 * 123 * 294/760 * 294
V2 = 119.98 mL
how many grams are in 2.34 moles of Li?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams.
Thus, the answer would be 16.24194.
Explanation:
how many total atoms are there is a sugar molecule
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate
Calculate the temperature of a gas when it is expanded to 5.25L. The gas originally occupies 3.90L of space at 252K.
Answer:
[tex]T_2=339K[/tex]
Explanation:
Hello there!
In this case, according to the Charles' gas law as way to understand the volume-temperature as a directly proportional relationship for this problem, we can write:
[tex]\frac{T_2}{V_2}=\frac{T_1}{V_1}[/tex]
Thus, given the initial temperature and volume and the final volume, we are able to calculate the final temperature as follows:
[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{252K*5.25L}{3.90L}\\\\T_2=339K[/tex]
Best regards!
What is the percentage composition of C6H12O6? Must show work.
Answer:
I think the percent composition of carbon in C6H12O6 is: 25% C 40% C 7% C
Explanation:
PLEASE HELP ASAP
Volcanoes erupt as a result of
A) Two continental plates converging
B) One oceanic plate converging with one continental plate
C) Two tectonic plates transforming
Answer:
B.) One oceanic plate converging with one continental plate.
HOPE THIS HELPS!
Answer:
C: Two tectonic plates transforming
How many grams of HCl are needed to form 34.5 grams of Cl2?
Answer:
Expof HCl are required to produce 7.50 moles of ZnCl2? 6. Copper ... When 9.34 g of zinc react with excess hydrochloric acid how many grams of zinc chloride will.lanation:
Explain the laboratory preparation of hydrogen
Answer:
laboratory preparation off Hydrogen: Hydrogen is prepared in the laboratory by the action of the dilute hydrochloric acid or dilute sulphuric acid on granulated zinc. Use of Granulated Zinc Granulated zinc contains an impurity like copper which acts as a positive catalyyst.
Explanation:
Hope this helps!
calculate the concentration of the solution produced when a 3.2g of sodium chloride is
issolved in 8dm of water.
Answer:
The concentration of the 3.2 g of sodium chloride in 8 dm³ of water is 6.845 × 10⁻³ M
Explanation:
The concentration of a solution is given as either the ratio of mass to volume, or the ratio of volume to volume or as molarity
[tex]Concentration, C = \dfrac{Mass}{Volume} = \dfrac{Volume}{Volume} = \dfrac{Number \ of \ moles }{Liters \ of \ solution}[/tex]
The number of moles present in 3.2 g of sodium chloride, 'n', is given as follows;
[tex]n = \dfrac{Mass}{Molar \ mass}[/tex]
The molar mass of sodium chloride, NaCl = 58.44 g/mol
n = 3.2 g/58.44 g/mol = 0.0547570157 moles
8 dm³ = 8 Liters
Therefore, the concentration, C = 0.0547570157 moles/(8 liters) = 6.845 × 10⁻³ M
The concentration of the 3.2 g of sodium chloride in 8 dm³ of water = 6.845 × 10⁻³ Molar solution.
AH for the reaction
IF5 (g) → IF3 (g) + F2 (g)
kJ, give the data below.
IF (8) + F2 (g) → IF3 (8)
IF (g) + 2F2(8) ► F5 (8)
AH=-390 kJ
AH=-745 kJ
A) -1135
B) +35
C) +1135
D) -35
E) +355
Answer:
E) +355 kJ
Explanation:
Based on Hess's law, it is possible to obtain ΔH of a reaction from the sum of similar reactions:
(1) IF(g) + F2(g) → IF3(g) ΔH = -390kJ
(2) IF(g) + 2F2(g) → IF5(g) ΔH = -745kJ
The sum of (1) - (2) is:
IF(g) + F2(g) → IF3(g)
IF5(g) → IF(g) + 2F2(g)
_________________
IF5(g) → IF3(g) + F2(g)
ΔH = -390kJ - (-745kJ)
ΔH = +355kJ
Right answer is:
E) +355 kJHow many electrons are represented by a dash (-) in a lewis dot structure compound?
A. 2
B. 4
C.3
D. 1
How many grams are in 4.00 moles of Cr2O3?
Answer:
607.9616 grams
Explanation:
Hope this helped!!
Need help on this question asap pleasee
No links
Answer:
Endothermic
Explanation:
An endothermic reaction is one in which energy is absorbed while an exothermic reaction is one in which energy is given out(evolved).
If we look at the reaction as written; 3C(graphite) + 3H2(g) + 88kcal -------> C3H8(g), we will notice that;
i) 88kcal of energy had to be absorbed for the reaction to occur
ii) The enthalpy change for the reaction is positive.
Since energy must be taken in to drive the forward reaction, then the reaction is endothermic as written.
In the reaction below, 22 g of H2S with excess
O2 produced 5 g of sulfur.
? H2S + ? O2 → ? S + ? H2O .
What is the percent yield of sulfur?
Answer in units of %.
Answer:
24.1 %
Explanation:
This is the reaction of oxygen between hydrogen sulfide.
The equation is:
2H₂S + O₂ → 2S + 2H₂O
As the oxygen is the excess, limting reagent is the H₂S.
We convert the mass to moleS: 22g / 34.06 g/mol =
0.646 moles
Ratio is 2:2. 2 moles of sulfide can produce 2 moles of sulfur.
Then, 0.646 moles of sulfide will produce 0.646 moles of S.
We convert the moles to mass: 0.646 mol . 32.06 g/mol =
20.71 g
That's the theoretical yield.
% yield = (produced yield / theoretical yield) . 100
% yield = (5 g/ 20.71g) . 100 = 24.1 %
An inherited behavior or physical characteristics that helps an organism survive and reproduce Natural selection Predation Adaptation Competition
look at pic thanks :D
Answer:
it's natural selection
Explanation:
adaptation is when you adapt to some situation
1. What is the function of the circulatory system? * 10 points A. Provide blood with oxygen from the air, & to get rid of carbon dioxide B. Carry oxygen, nutrients, waste, & to fight pathogens C. Secrete hormones to regulate the body and maintain homeostasis D. Produce red blood cells, white blood cells, & platelets
Answer:
B. Carry oxygen, nutrients, waste, & to fight pathogens
Explanation:
The circulatory system refers to all organs and tissues involved in carrying blood and lymph around the body.
The circulatory system carries oxygenated blood from the heart to cells and deoxygenated blood back to the heart.
Nutrients are carried in the blood to cells in different parts of the body and waste products are also carried from cells in the blood.
White blood cells is a component of blood in the circulatory system that fights off diseases.
Which statement describes the endothermic reaction represented by this
graph?
Answer:
Option A, describes the endothermic reaction represented by this graph
Explanation:
In this graph the energy released (or the potential energy) at the time of product formation is lower than the potential energy of the reactants. Hence, additional energy input will be required to form the product. Thus, energy is absorbed during the reaction.
Option A is correct
Answer: energy is given off by the reaction
Explanation:
Draw or sketch something that you might see move. Write a caption that answers the following questions: How would you describe its motion? Is it moving at a constant speed, or does it speed up and slow down?
Answer:
lets say your doing a frog
it jumps it speeds up and then slows down
Explanation: