Answer:
mass of ice is 1.75
Explanation:
Using, the formula given in the question,
m = Q/HΔf.................. Equation 1
Where Q = Heat, m = mass of ice, HΔf = Latent heat of fussion of for ice.
From the question,
Given: Q = 584.5 J, HΔf = 334 J/g
Substitute these values into equation 2
m = 584.5/334
m = 1.75 kg.
Hence the mass of ice without unit is 1.75
What is the difference between voluntary and involuntary muscles?
A. Voluntary muscles are striated and tire easily; involuntary muscles are not striated and do not tire easily.
B. Voluntary muscles can be almost anywhere; involuntary muscles are found only in the heart.
C. Voluntary muscles are under your conscious control; involuntary muscles are not.
D. Voluntary muscles are all skeletal muscles; involuntary muscles are cardiac muscles.
A sample of glucose, C6H12O6, weighs 90 grams. How many atoms of carbon are in the sample?
A)
1.8 x 1024
atoms
B)
3.0 x 1023
atoms
Eliminate
C)
15 atoms
D)
540 atoms
Law of
Answer:
please where are the rest of the questions you want to ask
Answer: A
Explanation:
HNO3 + KOH + H2O + KNO3
ACID:
BASE:
SALT:
Explanation:
acid, HNO3
base, KOH
salt ,KNO3
What is the molarity of a solution made from dissolving 10.0 moles of NaOH into 5.0
liters of solution?
A. 1.0 M
B. 1.5 M
C. 5 M
D. 2 M
Answer:
Option D
Explanation:
Molarity (M) of any solution is equal to the number of moles (n)of solute in it divided by total volume of solution (V)
Mathematically, it can be represented as
[tex]M = \frac{n}{V}[/tex]
Substituting the given values, we get-
[tex]M = \frac{10}{5} = 2[/tex]
Hence, option D is correct
How many mols of H2SO4 is in 0.80 L of 1.40 M H2SO4?
How many joules are required to boil 150. grams of water?
The amout of energy which are required to boil 150 grams of water is 47,092.5 Joules.
How do we calculate the absorbed heat?Amount of heat which is absorbed by the water to boil at 100°C is calculated by using the below formula as:
Q = mcΔT, where
m = mass of water = 150g
c = specific heat of water = 4.186 J/g.°C
ΔT = change in temperature = 100°C - 25°C = 75 °C
On putting values on the above equation, we get
Q = (150)(4.186)(75) = 47,092.5 Joules
Hence required amount of heat is 47,092.5 joules.
To know more about absorbed heat, visit the below link:
https://brainly.com/question/16559442
A student measures out 5 mL of calcium chloride solution into a small container and 5 mL of sodium carbonate solution in another small container. The total mass of both chemicals and the containers they are in is 15.5 g. When the student combined the two clear liquids, a gooey, cloudy precipitate formed. What would the total mass of the products and the two containers be after this reaction took place?
Group of answer choices
15.2 g
15.5 g
31.5 g
Answer:
15.5g
Explanation:
your welcome
An Asteroid is smaller than a planet but larger than a meteoroid? True or false pls no files or links they DO NOT WORK!!!!
Answer:
true astroids are in space and are bigger than meteorites but smaller than planets, meteorites which are asteroids after landing on earth and losing most of its mass on its way
If this abudullah kid answers I will report you
Explanation:
a. The melting point is at 20C and the boiling point is at 80C. The melting point is when a solid is going through a phase change to become a liquid, that is the 1st plateau in the graph. The boiling point is when the liquid is going through vaporization to become a gas. That is the second plateau.
b. At 30C, it is a liquid, since our melting point is at 20C.
c. The substance before 20C is a solid, as we add energy, it will melt and become a liquid.
The graph is different for each substance but in this same configuration where a change in the graph is a different phase or a phase change.
Where that first incline = solid
1st plateau= melting or freezing
2nd incline= liquid
2nd plateau= vaporization or condensation
3rd incline= gas
PLEASE HELP
A strong acid will __________ into ions when placed in water.
A
not dissolve
B
partially dissolve
C
completely dissolve
D
sometimes dissolve
Answer:
c. completely dissolved
Buscaban el elixir de la vida eterna A) Los alquimistas B) Los flogistas C) Los iatroquímicos D) Los químicos E) Los brujos
Answer:
A) Los alquimistas.
Explanation:
¡Hola!
En este caso, es necesario recordar que en la historia de la ciencia, la alquimia se define como una vieja práctica protocientífica con tintes filosóficas que se enfocaba en la combinación de elementos de la química, metalurgia, física, medicina, astrología, semiótica, misticismo, espiritualismo y el arte; por tal razón, se sabe que esta era la que buscaba el elixir de la vida eterna. Por lo tanto, la respuesta es A) Los alquimistas.
¡Saludos!
If 10.00 mL of 5.00M HCl, a strong acid, is added to 90.00 mL of pure water, the final volume of the solution is 100.00 mL. What is the pH of the solution?
Answer:
pH = 0.30
Explanation:
Hello there!
In this case, according to the given information about the acid, before we calculate the pH we must compute the final concentration of the acid after the dilution process:
[tex]M_2=\frac{10.00mL*5.00M}{100.00mL}=0.5M[/tex]
Thus, since this strong acid is 100% ionized, the concentration of hydrogen ions will be also 0.5 M and therefore the pH:
[tex]pH=-log(0.5)\\\\pH=0.30[/tex]
Best regards!
_A1Br3+_K=_KBr+_A1
fill in the correct coefficients.
Using the reaction: Mg + O2 --> Mgo,
What is the balanced equation?
If you start with 2g Mg, how many grams of
02 do you need for this reaction to go to
completion?
Answer:
2Mg +O2 -----》 2MgO
the balanced equation
if you start with 2g of Mg let's calculate moles
one mole of mg id 24.30 g
so number of moles =0.08
hence 2 moles of Mg reacts with 1 mole of O2 molecule
so Moles of O2 molecule is 0.04
and mass of O2 in gm is = 16 ×0.04
which is equal to 0.64 gm
so the conclusion is if you start with 2g Mg, you need 0.64 grams of
O2 molecules for this reaction to go to
completion!!
i d k it's right or wrong but i tried my best :)
lorena paid the cashier 180 pesos for the 15 graded pad let b be the price of each pad how much did each pad cost a 10 pesos b12 pesos c 14 pesos d 18 pesos
Answer:
b. 12 pesos
Explanation:
Given the following data;
Amount paid = 180 pesos
Amount of pad = 15 pads
To find the cost of each pad, we would use the following expression;
[tex] Cost = \frac {Amount \; paid}{Amount \; of \; pad} [/tex]
Substituting into the formula, we have;
[tex] Cost = \frac {180}{15} [/tex]
Cost = 12 pesos
Therefore, the cost of each pad bought by Lorena is 12 pesos.
butane is a saturated hydrocarbon
what type of intermolecular forces does ammonium lauryl sulfate have?
Answer:
Ammonium lauryl sulfate, like any other surfactant, makes a good base for cleansers because of the way it disrupts the hydrogen bonding in water. Hydrogen bonding is the primary contributor to the high surface tension of water. In hydrogen bonding with the water surrounding them.
All the following are non-foliated metamorphic rocks EXCEPT:
A: Hornfels
B: Marble
C: Quartzite D: Slate
Answer:
d:slate
Explanation:
Because they have aromas, compounds with a ring of resonance bonds are called –
A) fragrent compounds
B) pungent molecules
C) aromatic compounds
D) scented structures
Answer:
the answer is Fragrent compounds
help me please id appreciate it
Answer:
Thats the periodic table of elements
Explanation:
Why is a comet's orbit considered a cycle?
Answer:
. Comets go around the Sun in a highly elliptical orbit.
Explanation:
Answer:
Comet's orbit around the sun at a rapidly high speed witch considers the comets orbit a cycle.
Which statement is true about our Sun?
The Sun is the 2nd closest star to the Earth.
The Sun is a couple of million miles away from other stars.
The Sun is a white dwarf.
The Sun is yellowish in color.
Answer:
The sun is yellowish in color
Explanation:
The Sun is the closest star to the Earth.
The Sun is more than a couple million miles from other stars.
The Sun is not a white dwarf, but will become one in the future.
The Sun IS a yellowish color so.....
Hello, just wondering if anyone could help. If so thanks!!!
how many mol are there if there are 3 mol of KNO3?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KNO3, or 101.1032 grams.
Uhhhmmm help please
Answer:
it is used for testing the presence of starch in plants
Explanation:
it is the important element
What Does Co2 mean? A. Electron arrangement B. Chemical formula C, Bond arrangement D. Element formula
Answer:
chemical formula
Explanation:
Exercise 2:
The thermic decomposition of potassium chlorate (KClO3
) is a method used at laboratory to produce oxygen (O2
) and produce potassium
chloride (KCl).
1. Write the balanced equation of the reaction
2. Calculate :
3.1. The molar mass of KClO3
3.2. The number of moles of oxygen gaz produced during the decomposition of
0,5mol de KClO3
(s)
3.3. The mass of potassium chloride obtained from 30,6 g KClO3 solid
M(K)= 39 g.mol-1
; M(Cl)= 35 g.mol-1
; M(O)= 16 g.mol-1
Answer:
1. KCLO3------>KCL + 3/2O2(g)
2. 122.5g/mol
3. 0.2mol
4. 18.5g
Because they have aromas, compounds with a ring of resonance bonds are called –
A) fragrent compounds
B) pungent molecules
C) aromatic compounds
D) scented structures
Please helppp and no linkss
Answer:
C I'm pretty sure
Explanation:
uhhhhhhhhh yes
What are the half-reactions for a galvanic cell with aluminum and gold electrodes?
A. A3+ (aq) + 3e > Al(s) and Au+(aq) + e* → Au(s)
B. Al(s) → A13+(aq) + 3e and Aut(aq) + e
Au(s)
C. AB+(aq) + 3e – Al(s) and Au(s) — Au (aq) + e
D. Al(s) → AB+(aq) + 3e and Au(s) → Au(aq) + e
Answer:B is right
Explanation: Al loses electrons and is oxidised, Au gains electron. And is reduced
To solve such this we must know the concept of half cell reaction. Therefore, the correct option is option B that is Al(s) → A1³⁺(aq) + 3e and Au(aq) + e [tex]\rightarrow[/tex]Au(s)
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant. Al loses electrons and is oxidized, Au gains electron. And is reduced.
Therefore, the correct option is option B that is Al(s) → A1³⁺(aq) + 3e and Au(aq) + e [tex]\rightarrow[/tex]Au(s)
Learn more about the chemical reactions, here:
brainly.com/question/3461108
#SPJ2
How many moles are in 38 grams of Argon?
Answer:
we can conclude that there are 0.55 moles in 22 grams of argon.