You guys are working hard on this school work... You guys deserve to take a break, come hang out with me.
Answers
Answer:
hggggggggggggggggggggggggggggggggggggsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
Explanation:
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
Related Questions
Convert 100mL to L. Show your work to receive full credit.
Answers
Answer:
100 ml = 0.1 L
I divided 100 by 1000 because 1000ml = 1L
What particle has a negative electrical charge and is found in clouds
outside the nucleus? *
O Proton
O Neutron
O Electron
Answers
electrons
Revolving around the nucleus at a distance is a cloud of particles called electrons. Each electron has a negative charge.
Answer:
Electron
Explanation:
Because electrons are negatively charge particles
Which type of reaction is indicated by a positive AH?
o an endothermic reaction
O a reversible reaction
O a spontaneous reaction
O an exothermic reaction
Answers
Answer:
An endothermic reaction
Explanation:
A positive sign indicates that energy is absorbed. Hence it is an endothermic reaction.
A reversible reaction is indicated by a double arrow on the chemical equation.
A spontaneous is indicated by negative Gibbs Free Energy (G) value.
An exothermic reaction is indicated by a negative enthalpy change
Write the chemical symbols for three different atoms or atomic anions with 10 electrons
Answers
Answer:
i) Neon (Ne)
ii) Fluoride Ion (F⁻¹)
iii) Oxide Ion (O⁻²)
Explanation:
Ions are those charged species which are either positively charged (by loosing electrons) called as cations or negatively charged (by gaining electrons) called as anions.
In given examples, Neon is a neutral atom which has an atomic number 10. It contains 10 electrons in its neutral state with the electronic configuration 1s², 2s², 2p⁶.
Fluorine atom has an atomic number of 9. Therefore, it contains 9 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁵. When Fluorine atom gains one electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶.
Oxygen atom has an atomic number of 8. Therefore, it contains 8 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁴. When Oxygen atom gains two electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶ forming an Oxide Ion.
How can you use chemical formulas to determine if a change is chemical or physical?
Answers
Answer: Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Physical changes only change the appearance of a substance, not its chemical composition.
Chemical changes are also known as chemical reactions.
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When students work in a chemistry lab, the location of which item would be the most important for each student to know?
A.broom and dust pan, in case the student needs to sweep up broken glass
B.baking soda, in case the student needs to neutralize an acid spill
C.ice maker, in case the student needs to cool off hot glassware
D.safety shower, in case a chemical is spilled on the student’s body
Answers
Answer:
answer is D. safety shower, in case a chemical is spilled on the student’s body on edge 2020
Explanation:
have a great day peeps :)
It is important for student's to know the location of safety shower, in case a chemical is spilled on the student’s body which can be avoided by wearing proper personal protective equipments.
What are personal protective equipments?
Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.
It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.
It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.
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How many moles are in 1gm?
Answers
The mole is the fundamental unit of substance quantity in the SI. 0.041143797572516 moles make up 1 gram of magnesium. The grams to moles formula Use the grams to moles formula to calculate the number of moles, n, of a substance with a given mass, m, (in grams) accurately. n = m / M.
Depending on the substance, yes. As a reminder, a mole is equal to 6.02 1023 atoms and is used to measure quantities. Therefore, it stands to reason that lead and hydrogen would weigh differently. Less moles would be required because it would take a lot fewer lead atoms to make up 1 gram. However, one hydrogen atom has far less mass than one lead atom, therefore more atoms (and moles) would be required to create one gram.
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Help me with this question please.
Answers
Explanation:
conduction because it has succession
The_____gene shows up even when inherited only from one parent.
Answers
Answer:
The Alleles gene shows up even when inherited only from one parent
Explanation:
The two alleles in a gene pair are inherited, one from each parent. Alleles interact with each other in different ways. These are called inheritance patterns.
i hope this helped
You have 56.8 mL of a gas collected at 664 mmHg and 135 K. What volume will it occupy at 632 mmHg and 196 K? *
Answers
Answer:
86.6 mL
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 56.8 mL
Initial pressure (P₁) = 664 mmHg
Initial temperature (T₁) = 135 K
Final pressure (P₂) = 632 mmHg
Final temperature (T₂) = 196 K
Final volume (V₂) =?
The final volume of the gas can be obtained as follow:
P₁V₁/T₁ = P₂V₂/T₂
664 × 56.8 / 135 = 632 × V₂ / 196
Cross multiply
135 × 632 × V₂ = 664 × 56.8 × 196
85320 × V₂ = 7392179.2
Divide both side by 85320
V₂ = 7392179.2 / 85320
V₂ = 86.6 mL
Therefore, the final volume of the gas is 86.6 mL
Safety standards require a pool to add 333 chlorine tablets to every 2{,}0002,0002, comma, 000 liters of water. Today, the lifeguards at Park Pool added 888 chlorine tablets to their pool's 10{,}00010,00010, comma, 000 liters of water. How does Park Pool's chlorine compare to the safety standards
Answers
Compared to safety standards, that would be too little chlorine:
10,000 gallons is five times as much water as 2,000.
Therefore, Park's pool needs five times as much chlorine as is required for 2,000 gallons to meet safety regulations.
5 times 3 pills of chlorine equals 15 tablets. For Mark to meet safety standards, 15 chlorine tablets would be required. Use one three-inch tablet for every 10,000 gallons of pool water rather than stuffing your chlorinator or floater to the brim with tablets. This quantity of pills should be sufficient to maintain a good chlorine level if you shock your water once a week.
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7. Buffalo were moved from Yellowstone National Park because
they carried a serious disease
they had killed other animals
they were no longer protected there
the herd had grown too large
Answers
Answer:
they had killed other animals
I believe your answer is carried a serious disease.
Explanation: Buffalo are known to carry a disease called brucellosis, which can spread to livestock a kill other animals/
draw a diagram of the structure of the following atoms and state their electron arrangement:
(i) Mg
(ii)Ca
Answers
The diagrams of the arrangement of the electrons in calcium and magnesium have been shown in the image attached to this answer. There are two electrons in the valence shell of calcium.
How are the electrons arranged?We know that the electrons are the subatomic particles that we can be able to see in the shells of the atom. It is important that we ought to know that the electrons are the particles that are known to be responsible for the reactivity of the atom.
The number of the electrons that we can find in the atom would depend on the number of the protons that we have in the nucleus of the atom and this is because for the atom to be electrically neutral then we would have to have the same number of electrons and protons being in the atom as we know.
It is clear that calcium is a member of group two of the periodic table and that magnesium is also a member of group two of the periodic table.
The structures for calcium would have Ca and two dots while that of magnesium would have Mg and two dots.
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Which equation obeys the law of conservation of mass? h2(g) o2(g) → h2o(g) h2(g) o2(g) → h2o(g) 4he(g) 2h2(g) o2(g) → 2h2o(g) h2(g) → h2o(g) h2(g) o2(g) → 2h2o(g)
Answers
2H(g) + [tex]O_{2}[/tex] ⇒ 2H2O This equation obeys the law of conservation of mass.
The law of conservation of mass states that mass is neither created nor destroyed in chemical reactions. For example, carbon atoms in coal become carbon dioxide when burned. A carbon atom changes from a solid structure to a gas, but its mass remains the same.
In a chemical reaction, the mass of the chemical components before the reaction equals the mass of the components after the reaction. Therefore, for chemical reactions and low-energy thermodynamic processes in isolated systems, the total mass of reactants or starting materials must equal the mass of the products.
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33.0 g of Ni represents how many atoms?
1.99 x 10²⁵ atoms
0.562 atoms
3.39x 10²³ atoms
5.48 x 10^-23 atoms
3.22 x 10^-21 atoms
Answers
Use 33 grams (1 mol/58.69 grams) 6.02*10^23 to find the amount of atoms.
1. 33 grams (1 mol/58.69 grams) = 0.562276
2. 0.562276 * 6.02*10^23 = 3.3849 x 10^23
Since 33.0 has 3 sf, round the number above to 3sf, which would be 3.39 * 10^23 atoms
If 33.0 grams of hydrogen gas react with 300. grams of oxygen gas, what is the percent yield if an experiment produces 250. grams of water? Use the balanced equation from question 3.
Answers
Answer:
can you show us question 3 pls
Explanation:
you have a sample contianing 4.92x10^23 molecules of nitrogen dioxide. how many grams of nitrodgen dioxide do you have
Answers
As a result, 6.022 x 10 23 molecules of water weigh 18.02 g. A mole of sodium chloride (6.02 x 1023 formulas) weighs 58.44 g.
A substance's mole is equivalent to 6.022 x 1023 of that material (such as atoms, molecules, or ions). One mole, or 6.022 x 1023 molecules, is equal to one gram's worth of any given substance's molecular mass. Thus, a mole of oxygen (O2) weighs 32 kilos and has a molecular mass of 6.022 1023.
12 grams of pure carbon-12 weigh exactly one mole, or 6.022 x 1023 atoms, making one mole equivalent to 12 grams of pure carbon-12. • Avogadro's Number refers to the quantity of particles contained in one mole (6.0221421x1023).
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An element is reduced while another element is oxidized. 1. Acid base 2. Redox 3. Precipitation 4. Combustion
Answers
[tex] \huge\hookrightarrow \mathtt{ Answer }[/tex]
The reaction in which one element is oxidized and other element is reduced is known as :
[tex] \huge \boxed{ \mathbb{redox}}[/tex]
Answer:
[tex]\huge \mathcal{Answer}࿐Answer࿐[/tex]
[tex]\huge \mathcal{ redox} \:[/tex]
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The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175 years later
Answers
Ninety-seven years is the half-life of 90Sr. A sample of 90Sr would still have 0.015 of its original atoms after 175 years. The duration needed for a quantity to fall to half its starting value is known as the half-life.
The phrase is frequently employed in nuclear physics to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. One or more electrons are attached to the nucleus of every atom, which is made up of a nucleus. Protons and neutrons, in various numbers, make up the nucleus. Neutrons exist only in the most prevalent type of hydrogen. Atoms that are neutral or ionised are the building blocks of all solids, liquids, gases, and plasma.
[A]t=[A]o/[A]t=4.18 [A]o/[A]t=e4.18=65.5
[A]o = 1.5%[A]o], where [A]t = 0.015
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Potassium Permanganate is used for purifying drinking water, because
A. it is a sterilising agent
B. it dissolves the impurities of water
C. it is a reducing agent
D. it is an oxidising agent
Answers
Answer:
D. it is an oxidizing agent
Explanation:
Your body is made up of trillions of cells that perform all the functions you need to survive. Which other kinds of organisms are composed of cells?
Only animals are composed of cells.
Only animals are composed of cells.
Only animals and plants are composed of cells.
Only animals and plants are composed of cells.
Only animals, plants, and bacteria are composed of cells.
Only animals, plants, and bacteria are composed of cells.
All organisms are composed of cells.
Answers
Look at the general chemical equation below. A B C Which situation best describes the effect of a limiting reactant
Answers
The situation that best describes the effect of a limiting reactant is that when there is not enough A reactant to react with whole B.
The limiting reactant, also known as the limiting reagent, is the reactant that is used first during a chemical reaction, hence restricting the amount of product that can be produced. The limiting reactant can be identified in a variety of methods ,but they all require employing mole ratios from the balanced chemical equation.
The theoretical yield is the maximum quantity of product possible given the limiting reactant. The quantity of product actually procured, or actual yield, is usually always less than the theoretical yield. The percentage yield used to describe the actual yield indicates what portion of the theoretical yield was attained.
In the equation there is only one situation which describes the effect of limiting reagent when there is not enough of A to react with whole B.
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Glucose gives off 2808 kJ/mol when burned, how much energy can be
produced from 935 grams? *
O 14602 kJ
O 15.6 kJ
O 0.3330 kJ
O 3.00 kJ
Answers
180.157>>>2080
935>>>??
Answer is A
plz draw a periodic table with all its information
Answers
Answer:
Explanation:
Hope this helps u!!
Answer:
plz following me ❤❤...........,...,.,.
56. A rigid cylinder with a movable piston contains a 2.0-liter sample of neon gas at STP. What is the
volume of this sample when its temperature is increased to 30.°C while its pressure is decreased to
90. kilopascals?
A) 2.5 L
B) 2.0L
C) 1.6L
D) 0.22 L
Answers
V2 = 2.499 2.5 L is the sample's volume when its temperature is raised to 30 °C and its pressure is lowered to 90 kilopascals.
What does the word "volume" actually mean?
The volume of an item is the space occupied inside its three-dimensional boundaries. A other word for it is the object's capacity.
What is the volume of the liquid?
The volume of liquid measured in a vessel's standard units is known as the liquid measurement. Infant milk bottle with milliliter measurement indications and juice bottle with a 1 liter capacity are two examples of vessels that have a "capacity" or "volume."
As,
Gas constant R is constant, so, Ideal gas equation can be written as,
P₁ V₁ / T₁ = P₂ V₂ / T₂
Solving for V₂,
V₂ = (P₁ × V₁ × T₂) ÷ (T₁ × P₂)
Putting Values,
V₂ = (101.325 KPa × 2 L × 303 K) ÷ (273 K × 90 KPa)
V₂ = 61402.95 ÷ 24570
V₂ = 2.499 ≈ 2.5 L
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Explain the role of photosynthesis in the carbon cycle
Answers
Answer:
During photosynthesis, plants absorb carbon dioxide and sunlight to create fuel, glucose and other sugars for building plant structures. This process forms the foundation of the fast carbon cycle.In all four processes, the carbon dioxide released in the reaction usually ends up in the atmosphere.
Answer:
During photosynthesis, plants also absorb carbon dioxide and sunlight to create fuel, glucose, and other sugars for building plant structures. This process forms the foundation of the fast carbon cycle.
Explanation:
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How does the volume change if 50mL of a gas material is cooled from 30\deg C to 5\deg C ?
50mL
46mL
100mL
56mL
Answers
The final volume can be determined using Charles's law. The volume of gas at 5 degree Celsius will be 8.3 ml.
What is Charles's law of gases ?According to Charles's law, at constant pressure, the volume of a gas is directly proportional to the temperature.
Hence, V/T = constant.
Let, V1 and T1 be the initial volume and temperature and V2, T2 be the final quantities.
then, V1/T1 = V2/T2.
V2 = V1 T2/ T1
Given, V1 = 50 ml
T1 = 30 °C
T2 = 5 °C
Then, V2 = 50 ml × 5 °C /30 °C = 8.3 ml
Therefore, the volume of the gas reduces to 8.3 ml.
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CH4 + 2 Cl₂ →→ 4 HCl + C
4. Use the equation above to calculate how many moles of CH4 are required to
produce 3.6 moles of HCl. (2 pts)
Answers
By using given equation 0.9 moles of CH₄ are required to produce 3.6 moles of HCl.
In simple terms, what is a chemical reaction?The transformation of one or more reactants, also known as reactants, into one or more new products, also known as products, occurs during a chemical reaction.
Chemical reactions turn reactants into products by involving reactants in the process. As an illustration, when we breathe, oxygen is inhaled, and upon coming into contact with glucose, it reacts to create carbon dioxide, water, and energy.
Given chemical reaction:
CH₄ + 2 Cl₂ → 4 HCl + C
1 mole of CH₄ gives 4 moles of HCl
x moles of CH₄ gives 3.6 moles
x moles of CH₄ = 3.6/4
x moles of CH₄ = 0.9moles.
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Draw the structure of maleic acid ((Z)-but-2-enedioic acid).
Answers
The structure of maleic acid is H2C=CH2 with a double bond between two hydrogen atoms and a double bond between the second and third carbon atoms in the three carbon chain.
H3C-C=C-COOH
\ /
H2C=CH2
1. Draw a three carbon chain with a double bond between the second and third carbon atoms
H3C-C=C-COOH
2. Add two hydrogen atoms to the second carbon atom
H3C-C=CH2-COOH
3. Draw a double bond between the two hydrogen atoms
H2C=CH2-COOH
H2C=CH2
\ /
H3C-C=C-COOH
The structure of maleic acid is H2C=CH2 with a double bond between two hydrogen atoms and a double bond between the second and third carbon atoms in the three carbon chain.
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SnO2 (s) + 2 H2 (g) → Sn (s) + 2 H2O (l)
What mass of water is produced when 57.6g of SnO2 are consumed in the reaction above?
Answers
Answer:
SnO2+2H2 - Sn +2H2O
50g of tin plus 32g of oxygen-36g of H2O
82g- 36g
57.6g- x
cross multiply
82xg= 2073.6g
xg = 2073.6/82
Xg= 25.28g
Therefore the mass of water consumed in the reaction is 25.28g