Since gold and silver are the least reactive metals, they do not react with water. The surface of metallic lead is covered by a thin layer of lead oxide,. As a result, it does not react with water in normal circumstances.
Explanation:
Hope it helps you!!Answer:
why do silver mecury cupper gold not react with water
Explanation:
why do silver mecury cupper gold not react with water
If we have 2 L of oxygen in a jar and 2 L of hydrogen in another jar at STP. Number of molecules
A. of oxygen is greater than hydrogen
B. of oxygen is smaller than hydrogen.
C. are equal in both Jars.
Abby feeds her dog one and a half cups of food each day and Braxton feed his dog for out of goon
Braxtons dog eats 3 times more than Abbys
Answer:
Braxton's dog eats 3 times more food.
Explanation:
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?
Molecules in both the metal and the surrounding air will start moving at lower speeds. Molecules in both the metal and the surrounding air will start moving at higher speeds. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
which set of elements have chemical properties similar to carbon
Element Si, Ge, Sn, Pb have similar properties to carbon.
Reasons:
They all belong to same group i.e. group 14All elements have valency four.The electronic configuration of all elements is similar i.e. nS² nP²Thanks for joining brainly community!
Please can someone answer it correctly,If u answer it correctly I will mark u brilliant
They are oxidised in the body into simple sugars like glucose.
Carbohydrates #5They are also known as dietary fibres.
Roughage#6They are chemical substances that help in maintaining a healthy body.
Enzymes#8Not proper functioning of thyroid gland.
HypothyroidismHelpppp helpppp plsssss
A volume v =40ml of distilled water is added to volume vi =10ml of sugar_water solution of concentration ci=0.3mol.L-1
1) calculate the concentration cf of obtained solution
2) deduce the number or factor of dilution?
[tex]\Large \text{1)}[/tex]
[tex]\textbf{Use the formula and substitute the values}[/tex]
[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]
[tex]\textbf{Solve for the number of moles}[/tex]
[tex]n = 0.003\ mol[/tex]
[tex]\textbf{Calculate final volume }[/tex]
[tex]40+10=50\ mL[/tex]
[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]
[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]
[tex]\Large \text{2)}[/tex]
[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]
[tex]\displaystyle DF=\frac{50}{10}=5[/tex]
again could someone help me on this?
Answer:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Explanation:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Why did humans overhunt the Caribbean monk seal to extinction?
Question 3 options:
for their fur
for their blubber
for their bones
for their flippers
Answer:
for their fur
Explanation:
because the body is hunt
Balance the following chemical equation (if necessary):
C5H10O(I) + O2(g) ==> H2O(g) + CO2(g)
Answer:
C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Explanation:
In the original equation: C₅H₁₀O (l) + O₂ (g) --> H₂O (g) + CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 3 oxygen
Products: 1 carbon, 2 hydrogen, 3 oxygen
Cleary, the equation is not balanced. When deciding which element to balance first, avoid balancing elements that are present in more than one molecule on either side (ex. the oxygen on the reactant side). In this case, I started with carbon. Once the carbon was balanced, I balanced the hydrogen, keeping in mind the new coefficients I added when balancing the carbons. Lastly, I balanced the oxygen.
The balanced equation: C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 15 oxygen
Products: 5 carbon, 10 hydrogen, 15 oxygen
How many atoms are in a sample of iron weighing 14.56 g?
Do not report units in your answer. Report your answer in scientific
notation, with two places past the decimal point.
Answer:
1.570065717611
Explanation:
atomic mass and grams of sample, this gives you he amounts of atoms
please award brainliest
Thanks so much
Give differences between acids and bases
Answer:
An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons. An acid is a proton donor. A base accepts a proton.Explanation:
A sample of neon gas has a volume of 10.0 L at 500, mm Hg. What new pressure is needed to change the
volume to 6.0 L? (T constant).
Hence, the new pressure of the neon gas is 833.3 mm Hg.
To calculate the new pressure, we apply Boyle's law
Boyle's lawBoyle's law state that, at a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.
Formula:
PV = P'V'..............Equation 1Where:
P = Initial pressure of neon gasV = Initial volume of neon gasP' = Final pressure of neon gasV' = Final volume of neon gasMake P' the subject of the equation
P' = PV/V'............ Equation 2From the question,
Given:
V = 10 LP = 500 mm HgV' = 6 LSubstitute these values into equation 2
P' = 10(500)/6P' = 5000/6P' = 833.3 mm HgHence, the new pressure of the neon gas is 833.3 mm Hg.
Learn more about Boyle's law here: https://brainly.com/question/26040104
If the energy of a photon is [tex]3.34[/tex]×[tex]10^{-20}[/tex] J, what is the wavelength of that light?
Answer:
thats what I know please check if it's correctwhat is the mole ratio of O2 (g) to CO2 (g)?
Answer:
O2=1
CO2=2
1:2
aah its the answer
5.The energy level with which of the following quantum-number descriptions can contain the most electrons?
a. n = 2 , l = 1 b. n = 3, l = 2
c. n = 4, l = 3 d. n = 5 , l = 0 e. n = 5 , l = 3, m = +1
Which three sentences describe how a cyclone device works?
write an introductory text about metals, adding details you know
Sunlight, wind, and water are considered ____resources.
Question 3 options:
renewable
nonliving
fossil
nonrenewable
Sunlight, wind, and water are considered renewable resources
How many atoms are in 4 L of Neon
Answer:
this is the answer to the question 0.1962
Explanation:
4/20.18
=0.1962
How do you think new technology has helped scientists learn about genes and proteins?
Answer:
Advances in Technologies with Relevance to Biology: The Future Landscape
This chapter provides an overview and a perspective on the breadth and types of technologies that may have an impact on the life sciences enterprise of the future, with the understanding that there are inherent difficulties in anticipating or predicting how any of these technologies alone or in combination will alter the nature of the future threat “landscape.”
Rather than attempt to cover the technology landscape in a comprehensive manner, this chapter (1) highlights technologies likely to have obvious or high-impact near-term consequences; (2) illustrates the general principles by which technological growth alters the nature of future biological threats; and, (3) highlights how and why some technologies are complementary or synergistic in bolstering defense against future threats while also enhancing or altering the nature of future threats.
.
Explanation:
PLEASE HELP ME ASAP SCREENSHOT DOWN BELOW
Answer:
Elevation.
Explanation:
Although latitude is a very important factor in temperature, Las Vegas and Mt. Charleston are pretty close to each other, which makes me think that elevation would be the only thing that could explain the extreme difference in temperature.
is snowflake a mixture or substance?
A certain sample of calcium carbonate contains 4.68 moles. what is the mass of the CO3 ions present?
The change in free energy can best be described as
A. the energy level of the reactants.
B. the maximum energy level of the reaction.
C. the difference in energy between reactants and products.
D. the energy level of the products.
E. the difference in energy between reactants and the maximum energy.
Answer:
Letrang A o B o C o D or Letter A or B or C or D
2 HCL (aq) + CaCO3 (s) > CaCl2 (aq) + CO2 (g) + H20 (I)
A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2. What is (i) the molar mass of the element and (ii) name of the element?
This problem is providing us with the mass of an unknown element which produces 43.5 g of M3N2. Thus, its name and molar mass are required and found to be 4.02 g/mol and calcium nitride after the following:
Stoichiometry.In chemistry, stoichiometry is a tool used for the calculation of masses or moles involved in chemical reactions, by the utilization of molar masses and mole ratios based on proportional factors.
In such a way, for the given reaction, one can use the formulas to write the following balanced chemical equation:
[tex]3M+N_2\rightarrow M_3N_2[/tex]
Where there is a 3:1 mole ratio of the metal to the product, which means we can use the following stoichiometric setup:
[tex]35.3gM*\frac{1molM}{x}*\frac{1molM_3N_2}{3molM} *\frac{(3x+14.01*2)gM_3N_2}{1molM_3N_2}=43.5gM_3N_2[/tex]
Now, by using the numbers only, one will be able to calculate x as the atomic mass of the element M in g/mol:
[tex]35.3*\frac{1}{x}*\frac{1}{3} *\frac{3x+14.01*2}{1}=43.5\\\\\frac{105.9x+989.106}{3x}=43.5\\ \\105.9x+989.106=130.5x\\\\989.106=130.5x-105.9x\\\\x=\frac{989.106}{130.5-105.9} =40.2g/mol[/tex]
Which matches with the molar mass of calcium. Moreover, we find its name as calcium nitride.
Learn more about stoichiometry: brainly.com/question/9743981
What is the new temperature when 10L at 5K is compressed to 4.00L?
Answer:
2k
Explanation:
A container with a volume 2.0L is filled with a gas at a pressure of 1.5 atm. By decreasing the volume of the container to 1.0 L, what is the resulting pressure? Type in your answer using the correct number of significant figures . Remember to use formula for Boyles law; P1V1=P2V2
Need help with this question!!!
Answer:
P2 = 3
Explanation:
u know that:
V1 = 2.0L
P1 = 1.5 atm
V2 = 1.0L
P2 = ? (p1v1=p2v2)
1.5x2 = P2x1.0
3=P2x1.0 =>> 3.0 =P2
divided both side by 1.0 the remove 1.0 (left P2)
The pressure by decreasing the volume to 1 L will be [tex]P_2=3 \ atm[/tex]
what will be a new pressure?The given data is that
Volume [tex]V_1=2 \ Litres[/tex]
Pressure [tex]P_1=1.5\ atm[/tex]
When volume is reduced to
[tex]V_2=1\ liters[/tex]
By using Boyles Law
[tex]P_1V_1=P_2V_2[/tex]
[tex]P_2=\dfrac{P_1V_1}{V_2}[/tex]
[tex]P_2=\dfrac{2\times 1.5}{1} =3 \ atm[/tex]
Thus the pressure by decreasing the volume to 1 L will be [tex]P_2=3 \ atm[/tex]
To know more about Boyles law follow
https://brainly.com/question/26040104
A solution of sodium oxalate (Na 2C 20 4) in acidic solution is titrated with a solution of potassium permanganate (KMnO 4) according to the following
balanced chemical equation:
2KMnO4(aq) + 8H2SO4(aq) + 5Na2C204(aq) 2MnSO4(aq) - 8H20() +10C02(9) + SNa2SO4(aq) + K2SO4(aq)
What volume of 0.0206 M KMnO4 is required to titrate 0.176 g of Na2C204 dissolved in 50.0 mL of solution?
O a. 8. 54 ml
O b. 500 ml
OC 25 5 ml
O d.3.42 m
e. 63 8 ml
X
The volume of 0.0206 M KMnO₄ required to titrate 0.176 g of Na₂C₂O₄ dissolved in 50.0 mL of solution is 25.5 mL (Option C)
How to determine the mole of Na₂C₂O₄Mass of Na₂C₂O₄ = 0.176 gMolar mass of Na₂C₂O₄ = 134 g/mol Mole of Na₂C₂O₄ =?
Mole = mass / molar mass
Mole of Na₂C₂O₄ = 0.176 / 134
Mole of Na₂C₂O₄ = 1.313×10¯³ mole
How to determine the mole of KMnO₄2KMnO₄ + 8H₂SO₄ + 5Na₂C₂O₄ —> 2MnSO₄ + 8H₂O +10CO₂ + 5Na₂SO₄ + K₂SO₄
From the balanced equation above,
5 moles of Na₂C₂O₄ reacted with 2 moles of KMnO₄
Therefore,
1.313×10¯³ mole of Na₂C₂O₄ will react with = (1.313×10¯³ × 2) / 5 = 5.252×10¯⁴ mole of KMnO₄
How to determine the volume of KMnO₄Mole of KMnO₄ = 5.252×10¯⁴ moleMolarity of KMnO₄ = 0.0206 MVolume of KMnO₄ =?Volume = mole / molarity
Volume of KMnO₄ = 5.252×10¯⁴ / 0.0206
Volume of KMnO₄ = 0.0255 L
Multiply by 1000 to express in mL
Volume of KMnO₄ = 0.0255 × 1000
Volume of KMnO₄ = 25.5 mL
Learn more about titration:
https://brainly.com/question/14356286
When the volume of a gas is changed from 11.5 cm3 to __ cm3, the temperature will change from 415.0 K to 200.0 K
Answer:
Explanation:
Charles Law: The volume of and ideal gas is directly proportional to the temperature when the pressure is kept constant
V₁ - initial Volume = 11.5 cm³ ; T₁ = Initial temperature = 415 K ;
V₂ - final volume ;T₂ =final temperature = 200 K
[tex]\dfrac{V_{1}}{T_{1}}=\dfrac{V_{2}}{T_{2}}\\\\\\\dfrac{11.5}{415}=\dfrac{V_{2}}{200}\\\\\\\dfrac{11.5}{415}*200=V_{2}\\\\\\V_{2}=5.5 \ cm^{3}[/tex]