Answer:
The process of obtaining metals from their ores is called metallurgy . The process employed in getting the ore depends on the nature of the ore and the impurities present in it.
The ore in which they are found depends on their reactivity. For example,reactive metals such as aluminium are extracted by electrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide
How to make caramel out of sweetened condensed milk?.
Answer:
Preheat oven to 425°F.
Pour one can of sweetened condensed milk into a casserole dish or pie plate. Cover with foil.
Place in a larger pan and fill to ¾" with water. ( Fill water as needed while baking)
Bake 60-90 minutes or until condensed milk has reached a golden brown color.
Cool completely.
Explanation:
hope this helps :D
to show all work and cancel units as necessary.
the equation: 2CH4 + 130₂→ 8CO₂ + 10H₂O
How many moles of Carbon Dioxide can be produced if you begin the reaction with 4
moles of methane (CH4)?
How many moles of water can be produced if you begin the reaction with 4 moles of
methane (CH₂)?
How many moles of Oxygen gas will it take to produce 126 moles of water?
Answer:
Explanation:
1) For every 2 moles of methane consumed, 8 moles of carbon dioxide are produced. This means that if 4 moles of methane are consumed, the reaction can occur twice, meaning 8(2)=16 moles of carbon dioxide will be produced.
2) For every 2 moles of methane consumed, 10 moles of water are produced. This means that the reaction can occur twice, and hence 10(2)=20 moles of water will be produced.
3) For every 10 moles of water produced, 13 moles of oxygen gas are consumed. This means that if we want 126 moles of water, we need the reaction to occur 12.6 times, and thus 13(12.6)=163.8 moles of oxygen gas will be consumed.
After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased.
Which statement explains what happened next?
Positive feedback caused his pancreas to stop secreting insulin.
Negative feedback caused his pancreas to stop secreting insulin.
Negative feedback caused his pancreas to produce more insulin.
Positive feedback caused his pancreas to produce more insulin.
Answer:
Negative feedback caused his pancreas to stop secreting insulin.
Explanation:
i took the test its correct
What is the mass of 3.01 x 10^23 atoms of copper
Answer: There are 31.8 grams of copper.
Explanation:
what are the products of the neutralization reaction between HNO3 and Ca(OH)2?
HNO3+Ca(OH)2= Ca(NO3)2+H2O.Answer:
Explanation:hope this helps <3
the equilibrium concentration of hydroxide ion in a saturated iron(ii) hydroxide solution is 1.2 x 10^-5 M at a certain temperature. calculate ksp of fe(oh)2 at this temperature
From the calculation as shpwn in the procedure below, the equilibrium constant of the substance is 6.9 * 10^-15.
What is equilibrium constant?The equilibrium constant for the solubility of aa solid in solution is called the solubility product Ksp. The Ksp shows the extent to which a solid is dissolved in solution.
Given that;
Fe(OH)2 ⇄Fe^2+ + 2(OH)^-
Ksp = s(2s)^2
We have s as 1.2 x 10^-5 M
So
Ksp = 4s^3
Ksp = 4( 1.2 x 10^-5 )^3
Ksp = 6.9 * 10^-15
Learn more about Ksp:https://brainly.com/question/27132799
#SPJ1
How many moles of nitrate are dissolved in water if 6.15 mole strontium nitrate dissolve?
***hint: how many nitrate ions are found in the compound?
The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is : 12.3 moles
Given data :
Moles of strontium nitrate = 6.15 moles
Ionization of Strontium NitrateWhen strontium nitrate ( [tex]Sr(NO_{3} )_{2}[/tex] ) is placed in water it will dissociates into its ions because strontium nitrate is an ionic compound.
Next step : Represent the ionization of strontium nitrate
[tex]Sr ( NO_{3} )_{2} (aq) --- > Sr^{2+} (aq) + 2NO_{3} ^{-} (aq)[/tex]
From the Stoichiometry of the chemical reaction
I mole of strontium nitrate = 2 moles of Nitrate ions
6.15 mole of strontium nitrate = 2 * 6.15
= 12.3 moles of Nitrate
Hence we can conclude that The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is : 12.3 moles.
Learn more about Stoichiometry of chemical reaction : https://brainly.com/question/27058367
A 50 L baby pool has a chlorine concentration of 0.200 M. If 20 L of water evaporated on a hot
summer day, what is the final concentration of the pool?
A 50 L baby pool has a chlorine concentration of 0.200 M. If 20 L of water evaporated on a hot summer day, 3333 M is the final concentration of the pool.
What is molarity?Molarity is defined as the moles of a solute per litres of a solution.
Molarity is also known as the molar concentration of a solution.
A 50 L baby pool has a chlorine concentration of 0.200 M.
So, the volume of the baby pool is 50L with a concentration of 0.200 M.
[tex]V_1[/tex]=50 L
[tex]M_1[/tex]=0.200 M
If 20 L of water evaporated on a hot summer day, the volume of the baby pool will be 30L and we have to find the concentration of the baby pool after evaporation.
[tex]V_2[/tex]=30 L
[tex]M_2[/tex]=?
Apply the formula,
[tex]M_1V_1[/tex]=[tex]M_2V_2[/tex]
50 L X 0.200 M1 = 30 L X M2
[tex]M_2[/tex] = 0.3333 M
Hence, 0.3333 M is the final concentration of the pool.
Learn more about molarity here:
https://brainly.com/question/2817451
#SPJ1
Water (H2O) is a liquid at room temperature (22 °C) while methane (CH4) is a gas. Which BEST explains the difference in their phases of matter at room temperature?
Answer:
Explanation:
Methanes boiling point would be higher than water's
Water is a liquid because particles are held close to one another by hydrogen bonds, whereas methane is a gas because the weak IMF lets particles to spread out.
What is methane ?Hydrocarbon methane ( CH4 ) is a main constituent of natural gas. Because methane is a greenhouse gas (GHG), its presence in the atmosphere has an impact on the planet's climate and temperature.
A range of anthropogenic (influenced by humans) and natural sources release methane into the atmosphere.
The significant difference in polarity between oxygen and hydrogen causes the water molecules to be dipolar. As a result, a strong hydrogen bond forms between the H and O of nearby water molecules, packing the water molecules so closely together that water is a liquid at ambient temperature.
Thus, water is a liquid because particles are held close to one another by hydrogen bonds, whereas methane is a gas because the weak IMF lets particles to spread out.
To learn more about methane, follow the link;
https://brainly.com/question/2127750
#SPJ2
What would the concentration of an NaOH solution be if 25 moles were used and 50 L were used?
0. 5 M
0. 5 M
2 M
, 2 M
1250 M
1250 M
25 M
Answer:
0.5 M
Explanation:
To find the concentration, you take the moles and divide that by the liters;
[tex]\frac{moles}{liters} =\frac{25 moles}{50 L} =0.5M[/tex]
I hope this helps!
what is the least measurement of black hole,
Answer:
Here is the correct answerblack hole in ourter space for the first time the scientific research
and development of the following layers lethargic
Explanation:
STUDY CORRECTION.
The state of matter with an indefinite shape and definite volume is:.
Liquid. It's volume stays the same but liquid changes shape based on what it's contained in
How many grams of carbon dioxide are produced from 6.95 moles of oxygen in the following reaction?
2CH4 + 4O2 → 2CO2 + 4H2O
Answer:
153 g CO₂
Explanation:
To begin, the reaction is not in its simplest form. The coefficients can be divided by two. However, this will not change the answer.
CH₄ + 2 O₂ --> CO₂ + 2 H₂O
You can find the grams of CO₂ by taking the moles of O₂, using the mole to mole ratio of O₂ to CO₂ (via the coefficients), then converting moles of CO₂ to grams. You will need the molar mass of CO₂ since you want to convert it from moles to grams. This is calculated using the values on the periodic table. The ratios should be written in a manner that allows for the cancellation of units. The answer should have 3 sig figs.
12.011 g/mol + 2(15.998 g/mol) = 44.007 g/mol CO₂
6.95 moles O₂ 1 mol CO₂ 44.007 g CO₂
---------------------- x ------------------- x ------------------------- = 153 g CO₂
2 mol O₂ 1 mol CO₂
The half-life of 222Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it take for the sample to be reduced to 1.00 mg of Rn-222
The time in years taken for the sample to be reduced to 1.00 mg of Rn-222 from 36g is 0.57 years.
How do we calculate the total time?Total time for the decomposition of any element will be calculated by using the following equation as:
T = (t)ⁿ, where
t = half life time = 3.80 days
n = number of half lives
Let we calculate number of half lives as:
1- 36 → 18
2- 18 → 9
3- 9 → 3
4- 3 → 1.5
Almost 4 half lives are required, on putting values on the above equation, we get
T = (3.80)⁴
T = 208.51 = 208 days (approx) = 0.569 = 0.57 years. (1 yr = 365 days)
Hnece reqiuired time is 0.57 years (approx).
To know more about half life time, visit the below link:
https://brainly.com/question/14936355
Describe an adaptation to a plant's life cycle and explain how this adaptation helps the plant survive. (2 points)
Answer:
Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water.
Answer:
. Plant adaptations are changes that help a plant species survive in its environment. Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water. The leaves of aquatic plants are also very soft to allow the plant to move with the wave.
Explanation:
how many grams of methane will you have from 3 moles of Sodium Acetate
Answer:
roughly about 246.1?
Explanation:
A gas sample has a volume of 30.0 mL at a pressure of 1.53 atm. If the volume increases to 50.1 mL and the temperature remains constant, the new pressure in atms will be
At constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.
Boyle's lawBoyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Given the data in the question question;
Initial volume of the gas V₁ = 30.0mL = 0.03LInitial pressure of the gas P₁ = 1.53atmFinal volume of the gas V₂ = 50.1mL = 0.0501LFinal pressure of the gas P₂ = ?We substitute our given values into the expression above to determine the new pressure.
P₁V₁ = P₂V₂
P₂ = P₁V₁ / V₂
P₂ = ( 1.53atm × 0.03L ) / 0.0501L
P₂ = 0.0459Latm / 0.0501L
P₂ = 0.92atm
Therefore, at constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.
Learn more about Boyle's law here: brainly.com/question/1437490
Under which of the following conditions of temperature and pressure would 1.0 mol of the real gas CO2(g) behave most like an ideal gas?
(1) 100 K and 0.1 atm
(2) 100 K and 10 atm
(3) 500 K and 0.1 atm
(4) 500 K and 10 atm
(5) none of above
Answer:
c. 800 K, 0.1 atm
Explanation:
Good luck in AP Chem
An ion contains 54 electrons after its atom gained 1 electron to form a stable electron
structure. Write the name and symbol of the ion.
Answer:
Iodine has an atomic number of 53 meaning 53 electrons and it gain 1 electron when reacting with a metal. We know the element is a non metal as is gains an electron
Ion is fluoride (F⁻), gaining 1 electron for a stable electron structure like noble gas neon (Ne).
Fluorine (F) is an element with 9 electrons in its neutral state. By gaining 1 electron, it forms the fluoride ion (F⁻) with 10 electrons. This allows the ion to achieve a stable electron configuration, following the octet rule.
Fluoride ions are highly reactive due to their electron configuration and tend to form ionic compounds. They play essential roles in various chemical and biological processes, such as dental health, where fluoride compounds are added to prevent tooth decay.
Fluoride ions' stability and reactivity make them important in various industrial and scientific applications, including the production of fluorine-containing compounds used in refrigerants, plastics, and pharmaceuticals.
To learn more about noble gas neon here
https://brainly.com/question/33607426
#SPJ2
DETERMINE THE REACTANTS AND PRODUCTS AND WRITE THE CHEMICAL EQUATION COMPLETE WITH CORRECT FORMULAS AND SYMBOLS FOR THE CHEMICAL CHANGE BELOW
NOTE: USE YOUR KNOWLEDGE OF CHEMICAL FORMULA WRITING FROM THE GRADE 9 LESSON
1)SOLID POTASSIUM CHLORATE DECOMPOSES TO FORM SOLID POTASSIUM CHLORIDE AND OXYGEN GAS
REACTANT(S): ______________
PRODUCT(S): _______________
CHEMICAL EQUATION
2) WATER IS ELECTROLYZED TO FORM HYDROGEN AND OXYGEN GAS (Note: Hydrogen and Oxygen are diatomic elements)
REACTANT(S): ______________
PRODUCT(S): _______________
CHEMICAL EQUATION
Answer:
2KClO3(s) = 2KCl(s) + 3O2(g)
Explanation:
2KClO3(s) = PRODUCT
2KCl(s) + 3O2(g)=REACTENT
A sample has 0.2 moles of salt dissolved in 2 L of solution. What is the molarity
Don't put no random answer if you don't know it don't answer it please... TY :)
Molarity is the ratio of the moles and the volume of the solution in liters. The molarity of the 0.2 mole salt is 0.1 M.
What is molarity?The molarity of the solution is the molar concentration of the moles of the solute dissolved in a liter of solution. It is given as,
[tex]\rm Molarity (M) = \rm \dfrac{\text{moles of solute (n)}}{\text{volume (V) in liters}}[/tex]
Given,
Moles (n) of the salt = 0.2 mol
The volume of the solution (V) = 2 L
Substituting values in the above equation:
[tex]\begin{aligned} \rm M &= \dfrac{0.2}{2}\\\\&= 0.1 \;\rm M\end{aligned}[/tex]
Therefore, 0.1 M is the molarity of the sample.
Learn more about molarity here:
https://brainly.com/question/3947967
#SPJ1
The atomic symbol superscript 206 subscript 82 upper p b. represents lead-206 (pb-206), an isotope that has 82 protons and 124 neutrons. which atomic symbol could represent an isotope that undergoes radioactive decay to produce pb-206? superscript 238 subscript 92 upper u. superscript 222 subscript 87 upper p b superscript 178 subscript 72 upper h f. superscript 192 subscript 77 upper p b.
Answer: The atomic symbol represent an isotope that undergoes radioactive decay to produce Pb-206 can be, Polonium (Po).
Hello people ~
By reacting with which of the following, primary amines can be separated from secondary and tertiary amines?
a) Chloroform alone
b) Methyl iodide
c) Chloroform and alcoholic KOH
d) Zinc dust
Answer:
C. Chloroform and alcoholic KOH
Explanation:
Secondary and tertiary amines do not react with CHCl3 and alc. KOH generates isocyanide, whereas primary amine does.
Isabella travels 17 miles north, 3 miles east, and then 10 miles south. What is the total distance that Isabella has traveled?
Answer:
30 miles
Explanation:
Just add the numbers.
Which two factors must be considered when predicting whether two substances will dissolve in each other?
A. number of bonds and size of the molecules
B. number of bonds and molecular shape
C. type of bonds and size of the molecules
D. type of bonds and molecular shape
The two factors must be considered when predicting whether two substances will dissolve in each other are type of bonds and size of the molecules are two factors.
What is solubility?Solubility is the ability of solute particles to dissolve in any solvent, and solubility is directly proportional to the dissolving ability of the solute.
Solubility of any substance depends on the type of the bond present in the solute molecule i.e. polar or non polar. And it is also depends on the size of the solute as size defines the surface tenssion of the substance.
Number of bonds and shape of molecules are also define the solubility but not at that extent as their type and shape.Hence type of bonds and size of the molecules are two factors.
To know more about dissolution, visit the below link:
https://brainly.com/question/26073928
#SPJ1
A scuba tank has a pressure of 195 atm at a temperature of 10ºC. The volume of the tank is 350 L. How many moles of air are in the tank?
Answer:
The answer is 2939 moles.
Explanation:
To obtain the moles from these values you should apply the ideal gas formula because in a scuba tank all gas that you have inside is the air:
PV= nRT. (1)
Thus the moles number, n, is:
n = PV/ RT (2)
Where:
P is pressure: 195 atm;
V is volume: 350 L,
R is gas constant: 0,082 atm×L / mol×K
And T is temperature: 10°C, that must be converted in k, thus:
10°C + 273,15 = 283,15 K
Replacing these values in (2) the moles number, n, is:
2939 moles of air
I need help again :^
Use the model to describe the global pattern of atmospheric circulation.
Why is your model useful for describing winds over the oceans but not necessarily the winds that blow over landforms, such as coastlines and mountains?
Use the model to describe how the unequal heating of Earth and Earth's rotation causes Earth's patterns of atmospheric circulation.
Answer:
#1 Question answer =The global atmospheric circulation model can explain weather patterns and climate by describing how air currents move.
Explanation:
simple but still works.
Answer:
The global atmospheric circulation model can explain weather patterns and climate by describing how air currents move.
Explanation:
this is my answer
A 1 liter solution was diluted to a molarity of 2 M by bringing the volume up to 4 liters. What was the initial molarity of the solution?
Answer:
8.0 mol/L
Explanation:
To do this problem you need to use C₁V₁=C₂V₂. C=concentration and V=volume. (Note: you dont want to use M₁V₁=M₂V₂ because this is measuring mass not concentration).
So, V₁= 1.0L
C₂=2 Mol/L
V₂= 4 L
C₁ is unknown.
you would plug this equation in like this:
(C₁)(1.0 L)=(2.0 Mol/L)(4.0L).
Do algebra to get C₁ alone.
C₁=[tex]\frac{(2.0 mol/L)(4.0L)}{1.0L} =8.0 mol/L[/tex]
The liters cancel out and you are left with mol/L or M
I hope this helps! good luck :)
The pH of solution A is 7 and the pH of solution B is 5. Solution A has ____ times ______ hydrogen ion concentration compared to solution B.
Answer: 100, less
Explanation:
100 POINTS IF ANSWERED CORRECTLY
Think of the composition of each layer of Earth and their relative sizes. Also consider Earth's atmosphere, its oceans, its ice caps, and other materials on its surface. Think about how large or small these parts of Earth are compared to one another. Then complete the following sentence.
Overall, the Earth is made up primarily of: 1. water 2. air 3. soil 4. rock
They are extremely small infront of earth size.
We live in a very small dot like place on earth.The earth size is too big.As we are in dot like we can see objects far biggerBut according to earth It's extremely big than us