Answer:
2.05 x 10²⁴ molecules
Explanation:
The balanced equation for the chemical reaction is the following:
2 HCl + Mg → MgCl₂ + H₂
According to the equation, 2 moles of HCl are required to react with 1 mol of magnesium (Mg), so the moles of HCl required to react with 1.7 mol Mg are calculated as follows:
moles HCl = 1.7 mol Mg x 2 mol HCl/mol Mg = 3.4 mol HCl
We know that 1 mol of any compound is equal to 6.022 x 10²³ molecular entities, so we convert the moles of HCl to molecules as follows:
molecules HCl = 3.4 mol HCl x 6.022 x 10²³ molecules/1 mol = 2.05 x 10²⁴ molecules
Use the periodic table to identify the element indicated by each electron configuration by typing in the
chemical symbol for the element.
Answer:
Explanation:
1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb
We have that an element indicated by its electron configuration, we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
The Periodic table is categorized using the atomic number of elements and symbols are to aid search as well
For an element indicated by its electron configuration we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
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The Ideal Gas Law is as follows: PV = nRT.
Rearrange the equation for each variable.
P =
V=
n =
R=
T =
Answer:
p=nRT/V
v=nRT/P
n=PV/RT
t=PV/nR
Help! Pls tell me the meanings of all of these words and please try to make them short as possible!!! tysm have a great day! <3
Answer:
Biofuel: Fuel from living matter
Conservertion of energy: It's a law where energy, when bodies/particles touch in a close system stays constant.
Conduction: Where via touch heat/electricity travels to a diffrent thing.
Convert the scientific notation to a decimal number. Type the correct answer in the box. 4 × 10-5 cm = cm
Answer:
[tex]4 * 10^{-5}cm = 0.00004cm[/tex]
Explanation:
Given
[tex]4 * 10^{-5}cm = [\ ]cm[/tex]
Required
Solve
Apply law of indices
[tex]4 * \frac{1}{10^5}cm = [\ ]cm[/tex]
Evaluate 10^5
[tex]4 * \frac{1}{100000}cm = [\ ]cm[/tex]
[tex]4 * 0.00001cm = [\ ]cm[/tex]
[tex]0.00004cm = [\ ]cm[/tex]
Hence:
[tex]4 * 10^{-5}cm = 0.00004cm[/tex]
somebody please help?
WILL GIVE BRAINIEST PLS HELP RN :
In the backyard calorimetry lab I had 189.5 grams of water in my Batman thermos. The water started out at a
temperature of 16.4 °C. After a few minutes the water cooled to 8.9°C. How much thermal energy did the
water use to melt the ice cube?
Answer:
Q = 5949.35 J
Explanation:
Given that,
The mass of water, m = 189.5 grams
Initial temperature, T = 16.4 °C
Final temperature, T' = 8.9°C
We need to find the thermal energy the water use to melt the ice cube. The thermal energy is given by :
[tex]Q=mc\Delta T[/tex]
Where
c is the specific heat of the water, c = 4.186 joule/gram °C
So,
[tex]Q=189.5\times 4.186 \times (8.9-16.4)\\Q=-5949.35\ J[/tex]
So, the required amount heat is equal to 5949.35 J.
How many moles of NaCl are present in 23.5 grams of NaCl?
Answer:
0.342 mol
Explanation:
Molar mass of
NaCl = 58.4 g/mol
Number of moles in
20.0 g NaCl
is
20.0
g
58.4
g
/mol
=
0.342 mol
HELPPPPPP ASAP FDHTRFHBGFB
Answer:
is your answe b?
Explanation:
Im really asking
The energy of motion is called kinetic energy ? True or false
Answer:
True
Explanation:
Trust me
Answer:
True. Kinetic energy is the energy of motion. All moving objects have kinetic energy. When an object is in motion, it changes its position by moving in a direction: up, down, forward, or backward.
500.0 mL of a gas is at a pressure of 9.00 atm. What is the volume of the gas at
1.00 atm?
Answer:
4500
Explanation:
p1v1=p2v2
9 x 500= v2 x1
v2= 4500 ml
WHAT IS OZONE.....................
How does it acts as safeguard?
Explanation:
The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation from the sun. ... The ozone layer filters out most of the sun's harmful UV radiation and is therefore crucial to life on Earth.
The Ksp of SrSO4 is 3.2 × 10–7. What is the equilibrium concentration of sulfate ion in a 1.0-L solution of strontium sulfate to which 0.10 mol of Sr(CH3CO2)2 has been added?
Answer:
3.2x10⁻⁶M of sulfate ion can be added
Explanation:
The solubility of SrSO4 is:
SrSO4(s) → Sr²⁺(aq) + SO₄²⁻(aq)
Where Ksp is defined as:
Ksp = 3.2x10⁻⁷ = [Sr²⁺] [SO₄²⁻]
The concentration of Sr is:
0.10mol / 1L = 0.10M = [Sr²⁺]
Replacing in Ksp:
3.2x10⁻⁷ = [0.10M] [SO₄²⁻]
[SO₄²⁻] = 3.2x10⁻⁶M of sulfate ion can be added
Is the following chemical equation and exothermic or endothermic
reaction..... Mg + 2H20 - Mg(OH)2 + H2+ heat
Answer:
Exothermic
Explanation:
Exothermic reactions RELEASE heat as a product.
If you were to see "heat" or "energy" above the reaction arrow, then it would be endothermic.
help!!!!!!!!!!!!!!!!!!
Explanation:
उत्तर : गुरुत्वाकर्षण का सार्वत्रिक नियम :
इस विश्व का प्रत्येक पिंड दूसरे पिंड को एक बल से अपनी ओर आकर्षित करता है जो दोनों पिंडों के द्रव्यमानों के गुणनफल के समानुपाती होता है तथा उनके बीच की दूरी के वर्ग के व्युत्क्रमानुपाती होता
help pls! thank u (:
Answer:
7.65 moles of silver are produced
Explanation:
Zinc, Zn, reacts with silver nitrate, AgNO3, as follows:
Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
Where 1 mole of Zn reacts with an excess of AgNO3 to produce 2 moles of Ag
To solve this question we must convert the mass of Zn to moles and, using the chemical equation, we can find the moles of Ag as follows:
Moles Zn (Molar mass: 65.38g/mol):
250g Zn * (1mol / 65.38g) = 3.824 moles Zn
Moles Ag:
3.824 moles Zn * (2mol Ag / 1mol Zn) =
7.65 moles of silver are produced11. In the diagram below, what will allow more solute to be dissolved in the
solvent?
Which of these could possibly lead to an extinction?
A : adaptation
B : reclamation
C : symbiosis
D : pollution
Answer:
pollution
as all the other terms mentioned are beneficial for our biodiversity
Please help !!!Is this Lewis dot structure correct? Check whether each atom has an octet and whether the total electrons in the structure match the total valence
electrons of the elements. There MUST be a clear yes/no and some evidence of work in your answer
Answer:
The Lewis dot structure is not correct
Explanation:
Each atom ought to be surrounded by eight electrons or two electrons according to the octet rule. We now need to closely examine the structure to see if it fits into this description.
All the atoms in the molecule have the correct valence except the hydrogen which is directly attached to the oxygen.
The positive charge ought to mean that more than two bonds were formed between hydrogen and oxygen which is clearly not the case here.
Thus, the hydrogen atom attached directly to oxygen does not display the correct valence.
when precipitation hits the surface of the earth and makes its way to the sea that is called ?
Answer:
Run Off
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the
percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur
trioxide, 1.55 g of ammonia, and 0.804 g of water.
Answer:
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur trioxide, 1.55 g of ammonia, and 0.804 g of water. Can you please show step by step on how you got the answer thanks!
-
First, the balanced equation:
1 SO3 + 2 NH3 + 1 H2O --> 1 (NH4)2SO4
Find the limiting reactant using molar masses and mole ratios
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) = 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3) = 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O) = 0.04462 mol (NH4)2SO4
Therefore, the limiting reactant is sulfur trioxide.
Now find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4) = 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
Therefore, percent yield = 91.3%
hoppe it helps
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Hence,the percent yield is 91.3%.
What is percent yield ?
The percentage yield displays the amount of product produced in relation to the maximum mass. The proportion of atoms in the reactants that go on to produce the intended product is determined by the reaction's atom economy.
The balanced chemical equation is as follows:
1 SO3 + 2 NH3 + 1 H2O ⇒ 1 (NH4)2SO4
Find the limiting reactant by using molar masses and mole ratios as follows:
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3)
= 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3)
= 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O)
= 0.04462 mol (NH4)2SO4
Hence, the limiting reactant is sulfur trioxide.
Then, find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4)
= 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
percent yield = 91.3%
Thus, the percent yield is 91.3%.
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the number of moles of hydrogen that are needed to produce .253 moles of water
Answer:
454
Explanation:
j
A stable atom that has a large nucleus most likely contains?
O more neutrons than protons.
more protons than neutrons.
O equal numbers of protons and neutrons.
C changing numbers of protons and neutrons.
Answer:
equal numbers of protons and neutrons
A sample of a certain isotope has an initial activity of 40,000 cpm. After 24.8 days, the activity is 2500 cpm. What is the half life of the isotope?
Answer:
6.2 days
Explanation:
initial activity = 40,000 cpm
one half-life = 20,000 cpm
two half-lives = 10,000 cpm
three half-lives= 5,000 cpm
four half-lives = 2500 cpm
24.8 days/4 half-lives = 6.2 days/ half-life
What is 25 Ml into L
Answer:
0.025 liters
Explanation:
divide 25 into 1000
Answer:
25 mL = 0.025 L
Explanation:
edge 2023
Substance D - It has a high melting and boiling point. The arrangement of its particles are closely packed. It cannot conduct electricity unless molten or dissolved in water. What type of element is substance D?
Answer:
ionic
Explanation:
because when in molten or dissolved in water ions are free to move and carry a charge however when in solid the ions are fixed in position so can't carry a charge.
When water pours over a waterfall?
Charles's law describes the relationship of the volume and temperature of
gas at a constant mass and pressure. According to this law, what would
happen to the temperature of the gas if its volume decreased from 1.0 L to
0.50 L?
O A. The temperature would decrease by 500 K.
O B. The temperature would double.
O C. The temperature would be reduced by half.
O D. The temperature would increase from 500 K to 1000 K.
Answer:
The temperature would be reduced by half
Explanation:
Charles' Law => V ∝ T => V = kT => k = V/T
For two sets of T vs V conditions, the system constant (k) remains unchanged and k₁ = k₂ => V₁/T₁ = V₂/T₂.
Therefore, if V₁ is reduced to 1/2V₁ = V₂ => V₁/T₁ = 1/2V₁/T₂ => V₁/T₁ = V₁/2T₂
and solving for T₂ => 1/T₁ = 1/2T₂ => 2T₂ = T₁ => T₂ = 1/2T₁
∴ The initial temperature (T₁) would be reduced by half or, T₂ = 1/2T₁
Hydrogen bonding occurs when hydrogen is bonded to N, O, or F. Which of the following molecules has hydrogen bonding, when bonding with
their same molecules?
A. CBr4
O B.H2S
C. NO2
OD. NH3
Answer:
I think the answer is……
O B.H2S
Explanation:
I’m not sure tho, I’m just not 100% positive.
PLEASE help
which of the following ions is in a higher oxidation state than their normal ion?
a. none of these
b. F-
c. Mg2+
d. H2+
Answer:
b
Explanation:
because it has gained an electron
[tex]F^-[/tex] ion is in a higher oxidation state than its normal ion. Hence, option B is correct.
What is the oxidation state?An oxidation state is a number given to the atom of an element when participating in a chemical reaction.
The atoms of elements are not always neutral i.e. carry no charge. They sometimes carry either positive or negative charges to become ions.
[tex]F^-[/tex] is in a higher oxidation state than its normal ion because it has gained an electron.
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determine the total pressure of a gas mixture that contains oxygen at a pressure of 150 mmHg, nitrogen at 350mmHg, and helium at 200 mmHg
Answer:
Total pressure is the sum of all partial of all components
150mmHg + 350mmHg + 200mmHg = 700mmHg
700mmHg = 0.92atm
