Answers
Answer:
A) air
Explanation:
What is a mixture?
A mixture is a combination of two or more elements that have not chemically combined with one another. Each element in the mixture still has its own properties.Examples: Air; air is made of nitrogen, oxygen, CO2, and more, but they haven't chemically combinedWhat is a compound?
A compound is a substance that is made by two or more elements chemically combining with one another.Related Questions
Weather balloons carry instruments that can gather data about Earth’s atmosphere. On the ground, a weather balloon has a volume of 250. L, a pressure of 755 mmHg, and a temperature of 25.0°C. As the balloon ascends into the atmosphere, the temperature decreases to 22.0°C and the pressure changes to 710. mmHg. What is the new volume of the weather balloon? Type in your answer using the correct number of significant figures. L
Answers
Answer:
The answer is 263 L
Explanation:
I just did it on edu, and if you want the answer before this is 0.95 atm
Your welcome!
A sample of 35.1 g of methane has a volume of 5.20 L at a pressure of 2.70 atm. Calculate the temperature.
Answers
Answer:
4.78 K
Explanation:
If you mix equal volumes and concentrations of aqueous solutions of Cu(NO3)2 and K2S, which ions will remain in solution as spectators in the reaction
Answers
The spectator ions that remain in solution are potassium ion and nitrate ion.
What are spectator ions?The spectator ions are the ions that remain in solution after reaction. They are those ions that are unchanged at the end of the reaction. For the reaction of Cu(NO3)2 and K2S, teh products are CuS and KNO3.
As such the spectator ions that remain in solution are potassium ion and nitrate ion.
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What do many bases have in common?
Answers
Answer:
All bases conduct electricity as they are good electrolytes. All bases turn red litmus paper into blue at the time of indication. Bases have a bitter taste with a soapy texture
Explanation:
hope this helps
Answer:
Explanation:
All bases conduct electricity as they are good electrolytes. All bases turn red litmus paper into blue at the time of indication. Bases have a bitter taste with a soapy texture.
Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO Right arrow. 2Hg O2 The molar mass of O2 is 32. 00 g/mol. How many moles of HgO are needed to produce 250. 0 g of O2? 3. 906 moles 7. 813 moles 15. 63 moles 73. 87 moles.
Answers
15.63 moles of HgO are needed to produce 250. 0 grams of Oxygen.
How we calculate moles from masses?Moles of any substance can be calculated as:
n =W/M, where
W = given mass
M = molar mass
Given chemical reaction is:
2HgO → 2Hg + O₂
From the stoichiometry of the reaction, it is clear that:
2 mole of HgO = produce 1 mole of O₂
Given mass of O₂ = 250 grams
Molar mass of O₂ = 32 g/mole
Mole of produced O₂ = 250g / 32g/mole = 7.81 moles
Now, 7.81 moles of O₂ = produced by 2×7.81 = 15.63 moles of HgO
Hence, option (3) is correct i.e. 15.63 moles is the required moles.
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sodium hydroxide is added to water. What is the balanced equation for this ionization?
Answers
This can be represented by the chemical equation: NaOH H2O→ OH- + Na.
Are the number of neutrons equal to the atomic number?
Answers
The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Please mark ase brainliest
2 Na + 1 Cl2 → 2 Naci
How many grams of NaCl are created from 23,2 grams Cl2?
Answers
37 grams of NaCl (when I mean equivalent I mean the ratio of the equation is 1:2 for moles or Cl2 and NaCl
When an acidic molecule is added to water it will ____________ the pH of the solution because it increases the number of free __________ ions.
Answers
How many bases are needed to specify three amino acids.
Answers
What molecule is removed during dehydration synthesis?.
Answers
Answer: two hydrogen atoms and one oxygen atom are removed during dehydration synthesis.
Hope this helps!
Consider this reaction: NH4 HPO42− → NH3 H2PO4− Which is the Bronsted-Lowry acid ? NH4 HPO42- HPO42– H2PO4–.
Answers
Bronsted - Lowry acid in the given reaction is NH₄, as it gives H⁺ ion.
What is Bronsted - Lowry acid?According to the theory of Bronsted - Lowry, acids are those substances which gives H⁺ ion or proton in the aqueous medium.
Given chemical reaction is :
NH₄ + HPO₄²⁻ → NH₃ + H₂PO₄⁻
In the above reaction NH₄ is the Bronsted - Lowry acid as it gives H⁺ ion in the reaction and changes to NH₃ which is the conjugate base of NH₄. Whereas HPO₄²⁻ is the Bronsted - Lowry base as it accepts the H⁺ ion to form H₂PO₄⁻ which is the conjugate acid of it.
Hence, option (1) is correct, i.e. NH₄ is the Bronsted - Lowry acid.
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Answer:
NH₄
correct on ed 2022
Which number in the hydrologic cycle diagram represents precipitation?
1
2
3
4
Illustration of water cycle showing land and water body with arrows pointing outward and inward to both land and water body and some numeric labels one, two, three, and four mentioned along with arrows
I will give brainilest to however can answer!
Answers
Answer:
Its 3
Explanation:
I took the test
Answer: 3
Explanation: im in k12 got the same question
Calculate the molarity of a solution made by dissolving 12.5 g Na2CO3 in exactly enough
water to form 550.0 mL of solution.
Answers
Answer:
0.215 M
Explanation:
M = m/L
To find to moles of Na2CO3 we have an equation:
m = mass(g)/molar mass(g/mol)
Molar mass of Na2CO3 is 106
=>> 12.5g/106 = 0.118 moles
To convert ml to L, divided ml by 1000
550/1000= 0.55L
Apply this equation to find the molarity: M = m/L
0.118 ÷ 0.55 = 0.215M
Energy removal is illustrated in. A. Changing water ice to waterB. Changing water to steamC. Boiling of gasolineD. Evaporation of sea water
Answers
Answer:
D. Evaporation of sea water
Explanation:
Somebody help me please i'm tired of trying to solve this problem ༎ຶ‿༎ຶ
Answers
Answer:
Q Line A
A: (a) 0 (b) 20
B: (b) 10 (c) 10
C: (c) 10 (d) 10
D: (d) 10 (e) 13
E: (e) 13 (f) 0
F: (f) 0 (g) 0
a: The velocity is whatever you need to see when you are specifically using a numberline so the answer for a is just 10
b: The velocity for this one is not as easy as the last one, its 7.
Explanation:
When you have a number line and your trying to find a numberline, you just have to subtract the smaller line to the largest number but if you are trying to find the velocity in beetween more than one thane you add the two biggest ones and subtract the smallest one and if you make a wrong move like add the biggest and smalles youll... still get the same answer so it doesnt matter really but its just easier to do the smallest one as the subtracting number just FYI. Happy spring break!
why does nonmetallic elements pull elements from metallic elements so effectively during a reaction?
Answers
Answer:
Non metal are located on the right side of the periodic table. The non metals are more electronegative than metals, thus the non metals are trying to achieve to get Noble gas configuration by pulling the electrons from the metal..Explanation:
:))7. Which is not a sedimentary rock?
A basalt
B
calcite
С
gypsum
D
halite
Answers
Answer: C
Explanation: calcite is one of them and the other is one too
All geologists agree there should be a new epoch called the Anthropocene indicating the time humans dominated earth.
True
False
Answers
Answer: false I just took the test
What are the four factors that can affect reaction rate?
1. temperature
2. particle size
3. ??
4. ???
Brainliest if you finish this:
FREDDY! YOU'RE SUPPOSED TO BE ON LOCKDOWN!!!
Answers
Answer:
presence of catalyst.
reactant concentration.
Answer:
temperature
Freddy: don't care didn't ask plus your white. lol its one of them (:≡
Explanation:
What problems do you think you can solve using science
Answers
Answer:
you can solve the problem of growing a plant and it not germinating or possibly solve diseases.
Explanation:
Hope This Helps :)
Explain how distribution of traits occurs over a 50 generation time period.
Answers
Answer:
Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. Often, it is impossible to determine which two alleles of a gene are present within an organism's chromosomes based solely on the outward appearance of that organism. However, an allele that is hidden, or not expressed by an organism, can still be passed on to that organism's offspring and expressed in a later generation.
A gas at constant volume has a pressure of 4. 50 atm at 200. K. What will be the pressure of the gas at 250. K? 3. 60 atm 4. 60 atm 5. 63 atm 5. 89 atm.
Answers
5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.
How we calculate the pressure of the gas?Pressure of the gas will be calculated by using the ideal gas equation as:
PV = nRT,
From the question, it is clear that:
Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:
P/T = nR/V
And required equation will be:
P₁/T₁ = P₂/T₂, where
P₁ = pressure of gas = 4.50 atm
T₁ = temperature of gas = 200 K
P₂ = pressure of gas = to find?
T₂ = temperature of gas = 250 K
On putting all these values in the above equation, we get
P₂ = 4.50 × 250 / 200 = 5.625 atm
Hence, 5.625 atm is the pressure of the gas.
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How many grams of H20 are created from 1.3 liters of H2?
Answers
I am very very sorry for sharing 4t so please can u send me the same question again
A carbon monoxide molecule contains a _______.
A. Metallic Bond
B. Covalent Bond
C. Semisonic Bond
Answers
Answer:
B
Explanation:
Several phytochemicals, such as lycopene and resveratrol, may help the body ward off cancer. What is the best way to incorporate phytochemicals into your dietary pattern?.
Answers
Answer:
Consume a variety of brightly colored fruits and vegetables.
Explanation:
3. Use the chemical equation to answer the question.
2Ag(s) + H2S(g) → Ag2S(s) + H2(g)
The molar mass of silver (Ag) is 108 g/mol. The molar mass of sulfur (S) is 32 g/mol. The reaction uses 0.04 mol of silver. Which steps show how to determine the mass of silver sulfide (Ag2S) produced in the reaction?
A 2(108 g/mol)+32 g/mol=248 g/mol2(108 g/mol)+32 g/mol=248 g/mol; (248 g/mol)(0.02 mol)=4.96 g(248 g/mol)(0.02 mol)=4.96 g
B 108 g/mol+2(32 g/mol)=172 g/mol108 g/mol+2(32 g/mol)=172 g/mol; (172 g/mol)(0.04 mol)=6.88 g(172 g/mol)(0.04 mol)=6.88 g
C 108 g/mol+2(32 g/mol)=172 g/mol108 g/mol+2(32 g/mol)=172 g/mol; (172 g/mol)(0.02 mol)=3.44 g(172 g/mol)(0.02 mol)=3.44 g
D 2(108 g/mol)+32 g/mol=248 g/mol2(108 g/mol)+32 g/mol=248 g/mol; (248 g/mol)(0.04 mol)=9.92 g
Answers
The mass of silver sulfide that would be produced will be 4.96 g and the correct step would be option A.
Stoichiometric equationFirst, get the balanced equation of the reaction:
2Ag(s) + H2S(g) → Ag2S(s) + H2(g)
The mole ratio of Ag and Ag2S is 2:1
For 0.04 mole Ag, the equivalent mole of Ag2S would be: 0.04/2 = 0.02 moles.
Mass of 0.02 mole Ag2S = mole x molar mass
Molar mass of Ag2S = 108x2 + 32 = 248
Mass of Ag2S = 0.02 x 248 = 4.96 g
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In a group assignment, students are required to fill 10 beakers with 0.720 m cacl2. if the molar mass of cacl2 is 110.98 g/mol and each beaker must have 250. ml of solution, what mass of cacl2 would be used? use molarity equals startfraction moles of solute over liters of solution endfraction.. 3.13 g 38.5 g 200 g 617 g
Answers
200 grams is the required mass of calcium chloride.
What is molarity?
Molarity (M) is define as the no. of moles (n) of solute present in per liter of solution (V) i.e. M = n/V.
Given molarity of CaCl₂ = 0.720 M
Total volume of solution = 10×250 = 2500 mL = 2.5 L
Moles of CaCl₂ = 0.720×2.5 = 1.8 moles
Now we calculate the moles by using the below formula:
n = W/M, where
W = required mass = to find?
M = molar mass of CaCl₂ = 110.98 g/mol
Mass of CaCl₂ = 1.8 × 110.98 = 199.8 = 200g
Hence, option (3) is correct i.e. 200g. is the required mass of CaCl₂.
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Answer:
c
Explanation:
An engine has an energy input of 125 J, and 35 J of that energy is transformed into useful energy. What is the
efficiency of the engine?
O 28%
35%
O 72%
O 90%
Intro
Done
Answers
Efficiency is calculated as 35 / 125 * 100, which is 28%.
The ratio of the useful work accomplished by a machine or in a process to the total energy consumed is known as efficiency.
To get the percentage, divide the useable output, which in this example was 35 J, by the total input given to the machine, which was 125 J in this case, and multiply by 100.
We could have just not multiplied it by 100 if we didn't need the percentage.
I hope this helps you
:)
I need help ASAP, please.. Name two sodium salts that may be prepared by reacting sodium hydroxide with dilute sulphuric acid.
Answers
The two sodium salts that may be prepared by reacting sodium hydroxide and sulfuric acid are sodium sulfate and sodium bisulfate produced by neutralization .
What is a salt?
Salt is defined as a chemical compound which is ionic in nature and consists of cation and an anion.It has no net electrical charge as the charges are completely neutralized in case of salts.
They are classified as acidic, basic or neutral salts depending on the ions they produce on dissolution.They have wide variety of colors depending on the elements from which they are formed and have five basic tastes.Salts are usually odorless except a few exceptions . They are highly soluble in water and are insulators in the solid state, to make them conductive they need to be melted or dissolved.
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