Answer:
1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)
1. A sulfur atom has 16 protons, 18 neutrons, and 16
electrons. A sulfide ion has a 2– charge. Which of
the following is the correct number of particles that
make up a sulfide ion?
a. 18 protons, 18 neutrons, and 16 elections
b. 16 protons, 18 neutrons, and 18 electrons
c. 18 protons, 16 neutrons, and 16 electronis
d. 14 protons, 18 neutrons, and 16 electrons
e. 15 protons, 17 neutrons, and 17 electronis
Answer:
b. 16 protons, 18 neutrons, and 18 electrons
Explanation:
Things to be remembered
Negative charge on any ionic species indicates gained the electrons
Positive charge on any ionic species indicates lost the electrons
A sulfur atom has 16 protons, 18 neutrons, and 16 electrons, A sulfide ion has a 2– charge which indicates that sulphur has gained two electron from any other atom, ion or species!
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Translate the world equation in skeleton equation and balance them
(I) Hydrogen+chlorine= Hydrochloric acid
(II) potassium+chloride= potassium chloride+oxygen
Answer:
The balanced equation is: H2 (g) +Cl2 (g) →2HCl (g)
Explanation:
Balancing chemical equation refers to balancing the stoichiometric coefficients on the reactants and products side. This must be done as the chemical equation obeys the law of conservation of mass and momentum.
The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation. The Law of conservation of mass governs the balancing of a chemical equation.
Given chemical equation
The balanced chemical equation for the hydrogen + chlorine -> Hydrogen Chloride.
H2 + Cl2 → 2HCl
The equation is balanced as on the reactants side there are two hydrogens present and the same on the products side. For chlorine as well the same thing goes two chlorine atoms on the reactants side and two on the products side.
he narrator says that the story of the universe is the story of the transformation of energy from one form to another. What do you think he means?
Answer:
the narrator means that before the universe was out forward to completion,
there were little things that came together to form other things
a typical example can be found in the big bang theory
Answer:The narrator is pointing out that energy is involved in every event, and each event can be described in terms of energy.
Explanation:
Question 1 (8 points)
Name the following simple binary compounds.
1. NaBr =
2. KCl =
3. Mgo =
4. CaF2=
5. BaS =
6. Li20 =
7. NaF =
8. CS3N =
Answer:
Below
Explanation:
1. Sodium Bromide
2. Potassium Chloride
3. Magnesium Oxide
4. Calcium Fluoride
5. Barium Sulfide
6. Lithium Oxide
7. Sodium Fluoride
8. Cesium Nitride
PLEASE HELP ASAP
What does it mean that the collisions between gas particles are elastic?
Answer:
There is no net loss of energy from the collisions.
Explanation:
Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions. Gas particles are small and the total volume occupied by gas molecules is negligible relative to the total volume of their container.
What is Solution Concentration with examples
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Solution Concentration or the concentration of the solution.The amount of solute dissolved in a particular amount of the solvent is a crucial parameter and is called Solution ConcentrationEXAMPLE →if you add one teaspoon to two cups of water, the concentration could be reported as 1 t salt per 2 c water.[tex]\purple{\rule{15mm}{2.9pt}} \red{\rule18mm{2.5pt}} \orange{ \rule18mm{2.5pt}}[/tex]
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As the pressure on a given sample of a gas increases at constant temperature, the mass of the sample.
if 18.40 L of chlorine gas at STP reacts with aluminum metal, how many grams of aluminum chloride are produced?
equation: 3Cl2+2Al-->2AlCl3
At STP 1mol of gas weighs 22.4L
Moles of chlorine
18.40/22.40.8molNow
3mols of chlorine produces 2 mol AlCl_31 mol of chlorine produces 0.6mol AlCl_2Moles of AlCl_3
0.8(0.6)0.5molMass of AlCl_3
0.5(133)6.5gMagnesium + ... → Magnesium chloride + ....
Mg + HCl → MgCl_2 + H_2
(─.─||）
Answer:
Magnesium + hydrochloric acid → Magnesium chloride + hydrogen gas
Explanation:
acid + reactive metal (magnesium) → salt + hydrogen gas
how do you find the oxidation numbers for H3PO4
The parmo is a dish made from breaded meat and cheese sauce that originated in which english town?.
Answer:
Middlesbrough, North Yorkshire
,,Explanation:
How do you figure out the number of protons in an atom?
How do you figure out the number of protons in an atom?
Answer:
Atomic number shows u the amount of protons there are in the atom
The protons are equal to the number of electrons
The group number tells you the number of electrons on the outer shell
(Sorry if u didn’t want the extra info but really it’s simple like magnesium has 12 so it has 12 protons/ 12 electrons)
Answer:
To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number:
1. number of protons = atomic number.
2. number of electrons = atomic number.
3.number of neutrons = mass number - atomic number.
Which is the best definition of rate-determining step?
a) an elementary step that often occurs in the reaction mechanism
b) the elementary step that limits how fast the overall reaction proceeds
c) an elementary step that is used to derive a rate law
d) the unimolecular step in a reaction mechanism
Answer:
The correct answer is B. Give me Brainliest
In 1–2 sentences, explain what biome comprises most of Antarctica and why the continent is described as being part of this biome.
please answer in own words thank you
and i give brainlist
The biome which comprises most of Antarctica is the cold desert or polar desert.
What is a Biome?This is defined as an area which is classified according to the species that live there.
The climate of Antarctica is very cold with very little life forms which is why it is referred to as a cold desert or polar desert.
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9. A 2.00 L flask is filled with propane gas (CH) at a pressure of 1.00 atm and a
temperature of -15.0°C. What is the mass of the propane in the flask?
the correct amswer is 4.17g
I Need help with this worksheet I Need the Work Please Thank you
1. a. 3
b. 2
2. a. 4
b. 6
3. a. 1
b. 2
4. a. 5
In the case of pathogen infections, chronic inflammation indicates
that the host does not have functional defense mechanisms.
that the host is fighting a lengthy battle against the pathogen.
that the pathogen has become an established part of the host's resident microbiota.
that the pathogen infection has been effectively overcome by the host.
Answer:
The answer is that the pathogen has become an established part of the host's resident microbiota. :)
Have an amazing day!!
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In one to two sentences, describe characteristics of a high-pressure system.
i give brainlist
pls answer in your own words
Answer:
A high pressure area is an area where the air sinks. As it does, it warms up by the adiabatic effect of a greater pressure and that causes the clouds to evaporate, giving place to a clear sky
Explanation:
A high-stress area, high, or anticyclone, is a location in which the atmospheric stress on the surface of the planet is more than its surrounding environment.
What are the traits of the high-pressure system?In a high-Pressure system, it has better pressure in its center than in the regions around it. Winds blow away from excessive pressure.
Swirling withinside the contrary route from a low-stress system, the winds of an excessive pressure system rotates clockwise north of the equator and counterclockwise south of the equator.
Hence, these are the characteristics of high-pressure system.
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Calculate the volume of a solution of 3.6 M NH4Cl needed to prepare 350.0 mL of 1.24M NH4CH
Select one:
a. 120 mL
b. 12.0 mL
c. 967 ml
d. 96.7 ml
How many grams of ammonium chloride are in the solution you created in the above problem Select one:
a. 23.28
b. 0.438
c 53.58
d. 232 23
Answer:
select one :c
select two:d
The partial pressure of carbon dioxide is greatest in:.
Answer:
Partial pressure of carbon dioxide is high in the pulmonary capillaries.
Explanation:
please help
Which of the following diagrams shows how osmosis would affect a plant cell when placed in a solution with a lower solute concentration than its own?
A.
Diagram Y
B.
Osmosis is not dependent on solute concentration.
C.
Diagram Z
D.
Diagram X
Answer:
Diagram Z
Explanation:
A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.
Answer:
Diagram Y
Explanation:
Osmosis is the passive movement of water molecules across (into or out of) a cell membrane. "Passive" means that the process occurs automatically without the need for chemical energy.
In the diagrams above, a plant cell is shown as it would appear in a solution with a solute concentration more than its own (X), a solution with a solute concentration equal to its own (Y), and a solution with a solute concentration less than it own (Z). The movement of water is toward the area of more solute concentration (and therefore less water concentration).
The answer, then, is Diagram Y.
(Trust me, I just did it)
What type of probes physically land on the surface of a planet or moon?
Answer:
Here are three types of probes that land on space physically. Interplantery, orbiters, and landers.
Explanation:
These are the ones that collect data and other stuff from space.
Inside a car that was at STP, a 1.33L bottle warms up to 102.31oC. If the volume of the bottle remains constant, what is the pressure, in atm, inside the hot water bottle
so 68 + 83 is 182 easy done
Please helpI need help please show work!!
Answer:
≈32°C
Explanation:
1) the rule:
[tex]\frac{pV}{T}=const;[/tex]
2) according to the rule above the final temperature can be calculated as:
[tex]t_{final}=\frac{p_{init}}{p_{final}}*t_{init}; \ = > \ t_{final}=\frac{100}{300}*95=32.[/tex]
According to the Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.
What is Gay-Lussac's law?Gay-Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.
The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .The law is given by the formula, V₁/T₁=V₂/T₂, which on substitution gives T₂=95×100/300=31.6 °C.The container in Gay-Lussac's law is considered to be rigid in contrast to the container present in Charle's law.
Thus, as per Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.
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1. explain how u would test the presence of oxygen and hydrogen gases
2. explain how u can get the most accurate reading in titration
3. why is scientific method important in chemistry? state your opinion
4. you are given a bucket of ice cubes, a little sugar, a measuring cylinder and a stopwatch.Plan a experiment to determine whetther sugar increases the melting rate of ice
What is the function of the outer covering of a plant? a plant's outer covering is involved in reproduction. a plant's outer covering helps reduce water loss. a plant's outer covering is for preying on other plants. a plant does not have an outer covering.
Answer:
i dont know but good luck beacuse im doing the test and im stuck ngl
Explanation:
Answer:
B
Explanation:
HELP ANYONE PLEASE ASAP TYY!!!
Write down the structural formula for the monomer from which
polyvinyl chloride is derived.
(2)
Give the name of the monomer.
Answer:
Vinyl chloride is an organochloride with the formula H2C=CHCl that is also called vinyl chloride monomer (VCM) or chloroethene. This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride (PVC).
Explanation:
Answer:
CH2=CHCl
Explanation:
the number of cobalt atoms in 4.23 moles of cobalt
Answer:
[tex]2.55 \times {10}^{24} [/tex]
atoms
2) What amount of pressure is felt when your science teacher sits on a seat of nails
which measures 9 in by 9 in? Your science teacher weighs 280 pounds.
Answer:
23936.5 N/m² or 23936.5 Pa
Explanation:
Unit conversion
inches to meters ⇒ × 0.0254pounds to kilograms ⇒ × 0.45Our dimensions
9 inches ⇒ 0.229 m280 pounds ⇒ 127.01 kgSolving
P = F/AP = mg/AP = 127.01 x 9.8 / 0.229 x 0.229P = 1244.698 / 0.052P = 23936.5 N/m² or 23936.5 Pa