Answer:
well the world would be shocked
Explanation:
and suprise
What is the specific heat of a metal if 298.0 grams of the metal causes 300.00 grams of water to increase in temperature from 35.0°C to 48.8°C? (The original temperature of the metal was 95.6°C; its final temperature was 48.8°C.)
Answer:
Suppose a piece of iron with a mass of 21.5 g at a temp of 100.0 °C is dropped into an insulated container of water. The mass of the water is 132.0 g and its temperature before adding the iron is 20.0 °C. What will be the final temp of the system? Specific heat of iron is 0.449 kJ/kg K.
Solution:
1) Since
qlost, metal = qgained, water
we write
(mass) (Δt) (Cp, metal) = (mass) (Δt) (Cp, water)
2) Substituting:
(21.5) (100 − x) (0.449) = (132.0) (x − 20) (4.184)
Some explanation:
a) 100 − x is the Δt for the metal; it starts at 100.0 °C and drops to some unknown, final value.
b) x − 20 is the Δt for the water; it starts at 20.0 °C and rises to some unknown, final value.
c) Since both metal and water wind up at the same ending value, we need to use only one unknown for the two Δt expressions.
3) A wee bit of algebra:
(2150 − 21.5x) (0.449) = (132x − 2640) (4.184)
965.35 − 9.6535x = 552.288x − 11045.76
561.9415x = 12011.11
To 3 sig figs, the answer is 21.4 °C.
Explanation:
hope its correct!
a compound is 43.7 phosphorus and 56.3 oxygen formula mass is 284 calculate emperical formula and molecular formula
Answer:
the molecular formula of a compound is P₄O₁₀.
M(P₂O₅) = 2 · Ar(P) + 5 · Ar(O) · g/mol.
M(P₂O₅) = 2 · 31 + 5 · 16 · g/mol.
M(P₂O₅) = 142 g/mol; molar mass of empirical formula.
M(PₓOₙ) = 284 g/mol; molecular mass of unknown compound.
M(PₓOₙ) : M(P₂O₅) = 284 g/mol : 142 g/mol.
M(PₓOₙ) : M(P₂O₅) = 2 : 1.
Explanation:
The empirical formula is [tex]P_{2}O_{5}[/tex] and The molecular formula is [tex]P_{4}O_{10}[/tex]
How to find the empirical and molecular formula? Convert each elements in grams to its amounts in moles.[tex](\frac{47.3g}{1})( \frac{1 mol}{30.97g})= 1.41 moles[/tex] of Phosphorus.
[tex](\frac{56.3}{1})(\frac{1 mol}{16}) = 3.51 moles[/tex] of Oxygen
Divide each resulting values by the smallest of these values.3.51/1.41 = 2.49 (rounded off 2.5)
1.41/1.41 = 1
Multiply these numbers with integers to get whole numbers.2.5 *2 = 5 (Oxygen)
2 *1 = 2 (Phosphorus)
Hence [tex]P_{2}O_{5}[/tex] is Empirical formula
and [tex]P_{4}O_{10}[/tex] is Molecular Formula
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In the above equation how many moles of NO can be made when 43 moles of HNO3 are consumed?
Answer:
rn4y8rg7348y0rp934nrf3
efjewhrf8h934hfr84398wgfyu8o
Explanation:
fe8u34h4n3urhu93q4pirnpqr34uwbry8439br8u3i2rpi34ofreuebue rf ef erf3rw wg
How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?
The mass of water present in the solution is 21.5 g.
What is concentration?Concentration refers to the amount of solute in a solution. There are various ways of expressing concentration such as;
Molar concentrationMass concentrationPercentage concentrationWe have the following information;
Percent concentration = 35.0 %
mass of solute = 40.0 g
Mass of water = ?
So;
35 = x/40 + x × 100/1
35 = 100x/40 + x
35(40 + x) = 100x
1400 + 35x = 100x
1400 = 100x - 35x
1400 = 65x
x = 1400/65
x = 21.5 g
Hence the mass of water is 21.5 g.
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HELP PLS THANK YA!!!
Is Cu(OH)2 a covalent bond , an ionic bond or both?
The bond between the Cu²⁺ and OH⁻ ions is, well, ionic. However, the bond between the O and the H in the OH⁻ ion is covalent. So Cu(OH)₂ is, as a whole, an ionic compound, but it contains or comprises both ionic and covalent bonds.
PLEASE ANSWER!!!!!! WILL MARK BRAILIEST!!!! TYSM!!
Waves that we cannot actually see (unlike ripples in water) and that DO NOT need a medium to travel through belong to which category of waves?
Answer:
electromagnetic waves
Explanation:
The waves that do not need a medium to travel through are known as electromagnetic waves.
What are electromagnetic waves?These waves do not need any medium for their propagation or traveling. The waves have different wavelength and energy factors depending upon their rate of propagation. EMR waves travel from the sun to the earth in space.
Examples of electromagnetic waves are Xrays, gamma rays, radio waves, and more.
Find more information about electromagnetic waves here:
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What is the SI unit of length
4 points
Foot
Mile
Meter
Kilometer
Answer:
Answer is meter. ~~~~~~
1. Three fluids are poured from a beaker onto a lab table. Fluid A hits the table in 10 seconds, fluid B in 12 seconds, fluid C in 4 seconds, and fluid D
in 15 seconds. Which fluid has the highest viscosity?
O a fluid A
O b. fluid B
O c. fluid c
O d. fluid D
Answer:
fluid D
Explanation:
Fluid D has the highest viscosity because it is more difficult for it to move which makes it hit the table at 15 seconds
while fluid C has the lowest Viscocity which makes it move easily and it hit the table fastest
A solution contains 23 ppm of dissolved oxygen in 242.0066 ml of solution. What is the mass of oxygen?
Answer:
Mass of Oxygen is equal to 0.005566 grams
Explanation:
As we know,
ppm=(grams of solute/grams of solution)*1,000,000
Substituting the given values, we get -
23 ppm = (grams of solute/242.0066 grams)*1,000,000
1 ml = 1 gram
On solving the above equation, we get -
grams of solute = (23 * 242.0066)/1,000,000
= 0.005566 grams
Mass of Oxygen is equal to 0.005566 grams
The ocean pressure at the depth of the Titanic wreck is 400 atm . Calculate the ocean pressure in kpa?
A)3.00 × 10^4 kPa
B)4.05 × 10^4 kPa
C)4.05 × 10^3 kPa
D)4.05 × 10^2 kPa
Answer:
4.05 × 10⁴ kPaExplanation:
To find the pressure in kPa we use the conversion
1 atm = 101.3 kPaIf 1 atm = 101.3 kPa
400 atm = 400 × 101.3 = 40520 kPa
Expressing it in standard form we have the final answer as
4.05 × 10⁴ kPaHope this helps you
Answer: 3.04 x 10 mm Hg
Explanation:
The blades of a wind turbine are at rest until the movement of air causes the blades to spin.
Which energy transformation happens when the blades are spinning as shown?
Answer:
C
Explanation:
First there is no chemicals involved so cross out B and D. Wind turbines are made to create energy not to convert it so A is crossed out as well. The remaining answer is C.
The energy is transformed from mechanical to electrical when the blades are spinning, as shown.
What are wind turbines?
Wind turbines are large fans that convert the kinetic energy of wind into electrical energy.
The blades run by winds and generate electricity.
They are helpful, but they are a threat to birds and bats.
Thus, the correct option is C, mechanical to electrical energy.
Learn more about wind turbines
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Please help me out here please
PLEASE I NEED HELP ILL GIVE BRAINLYEST
What percentage increase did CO2 experience from 1800 to 2004 AD?
The percentage of CO2 increased 48 percent. Hope this helped!
The equilibrium constant for the reaction shown below is Kc=0.0091. If the equilibrium concentrations of A and B are 0.031 M and 0.0823 M, respectively, what is the equilibrium concentration of C?
Answer:
[tex][C]=0.0221M[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction at equilibrium:
[tex]3A\rightleftharpoons 3B+2C[/tex]
It is possible for us to set up the equilibrium expression as shown below:
[tex]Kc=\frac{[B]^3[C]^2}{[A]^3}[/tex]
Whereas Kc, [A] and [B] are known as 0.0091, 0.031M and 0.0823M and it is required to calculate [C]; thus, we solve for it as follows:
[tex][C]^2=\frac{[A]^3Kc}{B]^3}[/tex]
[tex][C]=\sqrt{\frac{(0.031)^3*0.0091}{(0.0823)^3}}[/tex]
[tex][C]=0.0221M[/tex]
Best regards!
acids are and can destroy your skin and bones
Answer:
This is true.
Explanation:
How is saturn like earth In any ways?
Answer:
Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt. This means that, like Earth, Saturn experiences seasons. Like Jupiter, Saturn is made mostly of hydrogen and helium.
Explanation:
Thats all I could think of, please mark brainliest
10 points! Will mark brainliest!!
kadalasang pinupuntahan ng mga patalastas
Would this be a strong or weak acid
Answer:
It Should be Strong Acid
Explanation:
Strong acids and bases ionize fully in an aqueous solution. Weak acids and bases also ionize, but only partially and the reaction is reversible. So how do we know if an acid or base is strong or weak? A simple way to determine strength is to add the acid or base to water— high reactivity means a stronger acid or base. This reactivity is measured with a value called the Ka or Kb value. It tells us how reactive an acid or a base is based on how many hydronium or hydroxide ions are formed during the reaction. Hope it helps :)
what is the bond formation of N and H
Answer:
A single bond, but it's also a hydrogen bond.
Explanation:
A hydrogen bond forms when hydrogen bonds to the 3 most electronegative atoms: Oxygen, Nitrogen, or Fluorine.
It's a single bond because hydrogen only has two valence electrons. Therefore, the rest of the electrons are placed around the nitrogen atom.
TRUE OR FALSE
Astronomers use spectroscopes to identify elements in stars because each element produces
unique emission spectrum
Answer:
True!
Explanation:
A spectrum is simply a chart or a graph that shows the intensity of light being emitted over a range of energies. Have you ever seen a spectrum before? Probably. Nature makes beautiful ones we call rainbows. Sunlight sent through raindrops is spread out to display its various colors (the different colors are just the way our eyes perceive radiation with slightly different energies).
Hope i helped!
A3.00 mol sample of CO2 (g) is in a rigid 6.00 L container at 400.°C.
Which of the following is the pressure of the gas?
16.4 atm
27.6 atm
200. atm
995 atm
Answer:
i'm thinking 27.6 not sure
Explanation:
you have a gas that has a pressure of 2 atm and a volume of 10L. what would be the new volume if the pressure was changed to 1atm?
Answer:
20 Liters
Explanation:
Boyles Law => ΔP ∝ 1/ΔT => P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂
P₁ = 2 atm
V₁ = 10 Liters
P₂ = 1 atm
V₂ = ?
V₂ = 2atm x 10L / 1atm = 20 Liters
please help me with this chem question!!
Answer:
caca123
Explanation:
UM
How does sunlight affect seasons?
Answer:
Seasons are caused by the Earth’s revolution around the Sun, as well as the tilt of the Earth on its axis. The hemisphere receiving the most direct sunlight experiences spring and summer, while the other experiences autumn and winter. During the warmer months, the Sun is higher in the sky, stays above the horizon for longer, and its rays are more direct.
IS ANYONE GOOD WITH CHEMISTRY???! i need help lol
Answer:
Help with what?
Explanation:
Answer:
help with whattt
Explanation:
um
A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 24
Answer:
There are 0.311 moles of gas in the tank
Explanation:
Complete question
A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 241 K. Find the number of moles of the gas
Solution
As we know
[tex]PV = nRT[/tex]
where P is the pressure of the gas in atm
V is the volume in liters
n is the number of moles
R is the gas constant = 0.08206 L·atm/K·mol
and T is the temperature in Kelvin
Substituting the given values in above equation, we get -
[tex]1.71 * 3.60 = n * 0.08206 * 241\\n = 0.311[/tex]
There are 0.311 moles of gas in the tank
In test tube 3, 3 mL of .002 M Fe(III) solution is combined with 7 mL of .02 M 5-sulfosaliclic acid (SSA) solution. What is the mole fraction of SSA in the test tube
Answer:
0.96
Explanation:
Number of moles of Fe(III) = 3/1000 * 0.002 M = 6 * 10^-6 moles
Number of moles of SSA = 7/1000 * 0.02 = 1.4 * 10^-4 moles
Total number of moles = 6 * 10^-6 moles + 1.4 * 10^-4 moles
Mole fraction of SSA = number of moles of SSA/ total number of moles.
Mole fraction of SSA = 1.4 * 10^-4 moles/ 6 * 10^-6 moles + 1.4 * 10^-4 moles
Mole fraction of SSA = 0.96
A chef uses a large aluminum spoon with a mass of 38.0 g to stir a pot of boiling water. As a result, the spoon’s temperature increases by 3.60°C. Consider that the specific heat capacity of aluminum is 0.90 J/g–°C. How much heat has the spoon absorbed? For credit, you must show all steps of your calculations.
Answer:
12,312 J or 0.12312 kJ
Explanation:
q = mCT
q = J of heat
m = mass
C = heat capacity
T = temp change
q = 38 x 0.90 x 3.6
q = 12312 J
q = 0.12312 kJ