Answer: [tex]3CO_3^{2-}(aq)+2Cr^{3+}\rightarrow Cr_2(CO_3)_3(s)[/tex]
Explanation:
Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.
The balanced molecular equation is:
[tex]3(NH_4)_2CO_3(aq)+2CrCl_3(aq)\rightarrow 6NH_4Cl(aq)+Cr_2(CO_3)_3(s)[/tex]
The equation can be written in terms of ions as:
[tex]6NH_4^+(aq)+3CO_3^{2-}(aq)+2Cr^{3+}(aq)+6Cl^-(aq)\rightarrow 6NH_4^+(aq)+6Cl^-(aq)+Cr_2(CO_3)_3(s)[/tex]
The ions which are present on both the sides of the equation are ammonium and chloride ions and hence are not involved in net ionic equation.
Hence, the net ionic equation is
[tex]3CO_3^{2-}(aq)+2Cr^{3+}\rightarrow Cr_2(CO_3)_3(s)[/tex]
Use your balanced reaction to make a "for every" statement for magnesium and hydrochloric acid in this reaction
A: For every 1 mol of magnesium, the reaction makes 1 moles of hydrochloric acid.
B: For every 24.305 mol of magnesium, the reaction uses up 34.46 mol of hydrochloric acid,
C: For every 1 mole of magnesium, the reaction uses 2 moles of hydrochloric acid.
D: For every 1 mol of magnesium, the reaction uses 1 mol of hydrochloric acid.
Answer:
Right answer is C.
Explanation:
Based on the reaction with magensium, Mg, and hydrochloric acid, HCl:
Mg + 2HCl → MgCl₂ + H₂
The reaction is balanced in moles therms
We can see that 1 mole of Magnesium is reacting with 2 moles of HCl to produce 1 mole of MgCl₂ and 1 mole of H₂. In another words:
For every 1 mole of magnesium, the reaction uses 2 moles of hydrochloric acid.
Right answer is C.The balanced reaction will be C. For every 1 mole of magnesium, the reaction uses 2 moles of hydrochloric acid.
From the information given, based on the reaction with magnesium and hydrochloric acid, the balanced reaction will be:
Mg + 2HCl → MgCl₂ + H₂
It can be deduced that the reaction is balanced. It can be seen that 1 mole of magnesium is reacting with 2 moles of hydrochloric acid to produce 1 mole of MgCl₂ and 1 mole of H₂.
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Which feature of a balanced chemical equation demonstrates the law of
conservation of mass?
A. It has the same types of atoms on both sides of the reaction
arrow.
B. It shows the reactants of a chemical reaction to the left of the
reaction arrow.
C. It shows the products of a chemical reaction to the right of the
reaction arrow
D. It has coefficients to show how much of each substance a
chemical reaction uses.
SUBMIT
Answer:
Another answer is : It has equal numbers of each type of atom in its reactants and products.
Explanation:
I just got it right on A.pex
Given the data from the question, the correct statement is:
It has the same types of atoms on both sides of the reaction arrow (Option A) What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
From the law of conservation of matter, it is evident that the same atoms of the element in the reactants are present in the products.
Thus, we can conclude that the correct answer to the question is: It has the same types of atoms on both sides of the reaction arrow (Option A)
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8. Which of the following is TRUE about limiting and excess reactants?
A. The excess reactant will be completely consumed after the reaction is complete
B. The limiting reactant determines the maximum amount of product that can be formed
C. Some of the limiting reactant is left over after the reaction is complete.
D. The reactant that has the largest given mass will be the excess reactant.
The statement which is TRUE about limiting and excess reactants is (B) The limiting reactant determines the maximum amount of product that can be formed.hence the correct option is (B)
What is Limiting reagent ?A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent.
Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained.
The reactant that is totally consumed during a reaction, or the limiting reagent, decides when the process comes to an end.
The precise quantity of reactant required to react with another element can be estimated from the reaction stoichiometry.
Therefore, The statement which is TRUE about limiting and excess reactants is (B) The limiting reactant determines the maximum amount of product that can be formed.hence the correct option is (B)
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All animals make body heat. True or false?
Answer:
False
Explanation:
Some animals are cold blooded
Answer:
false
Explanation:
Is the following equation balanced?
2C2H2 + 502 --> 4CO2 + 2H2O
Answer:
The reaction: 2C2H2+5O2->5O2->4CO2+2H2O is performed by mixing 175 grams of C2H2 and 175 grams of O2 to produce 127 grams of CO2
1)Limiting reagent
2)Theretical yeield of CO2
3)Percent yield of CO2
Explanation:
I think
please help will give brainiest
Answer:
reaction, reversed, The Law Of Conservation of Mass, mass, rusts, oxygen
Explanation:
HOPE THIS HELPS!
Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Pb ( N O ₃ ) ₂ (aq) + K I (aq) → ☐⁴⁻ ☐³⁻ ☐²⁻ ☐⁻ ☐⁺ ☐²⁺ ☐³⁺ ☐⁴⁺ 1 2 3 4 5 6 7 8 9 0 ☐₁ ☐₂ ☐₃ ☐₄ ☐₅ ☐₆ ☐₇ ☐₈ ☐₉ ☐₀ + ( ) → ⇌ (s) (l) (g) (aq) NR Pb I N O K Reset
Answer: [tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
The double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced molecular equation is:
[tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)[/tex]
In the alkaline phosphatase assay, you will you be monitoring the formation of product by measuring the absorbance of the solution using a spectrophotometer. Why are you monitoring the formation of product at a pH of 9 and a wavelength of 400nm.
A. At pH 9, the product, p-nitrophenol, will be ionized, the solution will appear yellow in color, and thus can be monitored at the wavelength of maximum absorption for the phenolate ion which is 400nm.
B. At pH 9, the product, p-nitrophenol, will be ionized and colorless
C. At pH 9, the product, p-nitrophenol, will be un-ionized and yellow in color
Answer:
a. At pH 9, the product, p-nitrophenol, will be ionized, the solution will appear yellow in color, and thus can be monitored at the wavelength of maximum absorption for the phenolate ion which is 400nm
Explanation:
In alkaline phosphatase assay, the hydrolysis of p nitrophenyl phosphate to p nitrophenol happens. When the ph is 9, the product which is p nitrophenol would undergo ionization. The solution is going to appear to be of yellow and it can be monitored at a wavelength for maximum absorption of phenolate ions at 400nm.
Option A is the answer to the question.
1. Complete the following sentences:
(a) Oxidation is a gain of electrons OR an increase in oxidation state
(b) Reduction is a loss of electrons OR a decrease in oxidation state
(c) Redox reactions involve a transfer of electrons from the element being _______________ to the element being ________________.
2. Complete the rules for assigning oxidation numbers by filling in the missing words.
(1) The oxidation number of an element is .
(2) The oxidation number of a monatomic ion is equal to the of the ion.
(3) In a polyatomic ion, the oxidation numbers of all the atoms in the ion add up to the
of the ion.
(4) In a compound, the sum of all the oxidation numbers of the atoms is
(5) The oxidation number of oxygen in its ions and compounds is always
except in where it is -1.
(6) The oxidation number of hydrogen in its ions and compounds is always
(7) The oxidation number of elements in compounds is often the same as their __________ if they were an ion
3. Give the oxidation number of the bold species in each of the following substances.
H2O S8 H2O2
AlCl3 O3 Fe2O3
MnO2 Cu KMnO4
4. Give the oxidation number of the bold species in each of the following substances.
Br- S2O32- NH4+
H2S MnO4- Cr3+
O22- Cr2O72- I-
C2O42- NO3- OCl-
SO42- MnO2 SO2
.
5. State the oxidation number of the underlined element in each of the following species.
(a) HCl (j) FeSO4
(b) CO2 (k) Fe2(CO3)3
(c) SO32- (l) KMnO4
(d) CO (m) MnI2
(e) KI (n) CaO
(f) H2O2 (o) Cr2O72-
(g) Cr(NO3)3 (p) HSO3-
(h) Br2 (q) ZnO
(i) H2SO4 (r) H2O
6. State whether each of the following reactions is an oxidation or a reduction reaction. Justify.
(a) O2- → O2
(b) I2 → I-
(c) Mg2+ → Mg
(d) HSO3- → SO42-
(e) Fe3+ → Fe2+
(f) Br2 → Br-
(g) Cr2O72- → Cr3+
(h) MnO4- → Mn2+
(i) Cl2 → Cl-
(j) H+ → H2
A car has a mass of 222 kg and is traveling at 13m/s. What is the Kinetic energy of the
car?
Explanation:
1/2*(13^2)*222=18759
What is the estimated life expectancy of tin reserves?
Answer:
chemical reaction hope this helps ;)
Explanation:
Give two reasons why people should use petrochemicals wisely.
As petrochemicals are originate from petroleum products, it is non-renewable and also can result in pollution so they are used wisely.
What are petrochemicals?Petrochemicals are the chemical byproducts of petroleum refining. Some petroleum-derived chemical compounds are also derived from other fossil fuels, such as coal or natural gas, or renewable sources, such as maize, palm fruit, or sugar cane.
All of this begins with six fundamental petrochemicals: ethylene, propylene, butylenes, benzene, toluene, and xylenes, which are combined with other chemicals and transformed into other materials that improve products.
Concerns are raised not only about the negative environmental impact, but also about the impact on human health.
Many petrochemicals are among the most toxic substances known to man, but they are found in almost everything, from plastics to synthetic fragrances and dyes to fertilizer.
Thus, these are used wisely.
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1.8 in to mm
Express your answer using two significant figures.
Answer:
46 mm.
Explanation:
Hello there!
In this case, according to the equivalence statements to convert from inches to centimeters, centimeters to meters and meters to millimeters, we can write:
2.54 cm = 1 in
100 cm = 1 m
1000 mm = 1 m
It is possible to set up the following conversion factor to obtain the required millimeters:
[tex]1.8in*\frac{2.54cm}{1in}*\frac{1m}{100cm} *\frac{1000mm}{1m} \\\\=46mm[/tex]
Best regards!
How many Joules of heat are released from a 400g piece of glass that has been cooled
from 28°C to 6°C? The specific heat for this particular type of glass is 0.664 J/g°C.
please show work.
Answer:
400 × 22 × 0.664 = 5843.2 J
Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose C6H12O6 and oxygen O2 gas. Calculate the moles of water needed to produce 0.075mol of glucose. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits
Answer: 0.45 moles of water are needed to produce 0.075mol of glucose.
Explanation:
The balanced chemical reaction is:
[tex]6CO_2(g)+6H_2O(l)\rightarrow C_6H_{12}O_6(aq)+6O_2(g)[/tex]
According to stoichiometry :
1 mole of glucose require = 6 moles of [tex]H_2O[/tex]
Thus 0.075 moles of glucose require = [tex]\frac{6}{1}\times 0.075=0.45[/tex] moles of [tex]H_2O[/tex]
0.45 moles of water are needed to produce 0.075mol of glucose.
Someone pls help me!!
Answer:
0.0821 L•atm/mol•K
Explanation:
The value of the ideal gas can be obtained as follow:
NOTE: We shall use the standard value for each variable. Based on the options given above, we shall use the equivalent units as well.
Pressure (P) = 1 atm
Volume (V) = 22.4 L
Number of mole = 1 mole
Temperature (T) = 273 K
Gas constant (R) =?
PV = nRT
Divide both side by nT
R = PV / nT
R = (1 × 22.4) / (1 × 273)
R = 22.4 / 273
R = 0.0821 L•atm/mol•K
Thus, the ideal gas constant is 0.0821 L•atm/mol•K
If water itself does not conduct electricity, then why is it dangerous to be in water during a
thunderstorm OR use electricity in a bathtub?
Electricity can flow through water (so don't swim with a toaster plugged in or at all)
If a 130-kg car is traveling at a velocity of 23 m/s, what is the kinetic energy of the car?
Kinetic energy is the amount of energy present in the object due to motion. It is required by the body for action and motion. The kinetic energy of the car is 34385J.
What is kinetic energy?Kinetic energy is a type of energy that is directly proportional to the mass of the object and the square of the velocity. The formula for the kinetic energy can be given as,
[tex]\rm KE = \dfrac{1}{2}mv^{2}[/tex]
Here,
Mass of the car (m) = 130 kg
Velocity of the car (v) = 23 m/s
Substituting values in the equation:
[tex]\begin{aligned}\rm KE &= \dfrac{1}{2}\rm mv^{2}\\\\&= \dfrac{1}{2}\times 130\times (23)^{2}\\\\&= 34385\;\rm J\end{aligned}[/tex]
Therefore, 34385J is the kinetic energy of the car.
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which statements describe the relationship between the area and the bioversity
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Pre-Lab Assignment
1.
Describe the following trends in properties of oxides across Period 3.
(a)
(b)
Their appearance.
Their volatility
Their structure.
Their acid-base character
Their conductivity
(d)
Answer:
See explanation
Explanation:
From left to right, the oxides across period 3;
i) Period 3 oxides all appear white in colour. They are all crystalline solids and their melting points decrease from left to right.
ii) The volatility of period 3 oxides increases from left to right across the periodic table
iii) The metallic oxides on the right hand side adopt giant ionic structures. Silicon oxide which is in the middle of the period forms a giant covalent structure. Oxides of other elements towards the right hand side form molecular oxide structures.
iv) The acidity of oxides of period 3 increases from left to right. Metals on the left hand side form basic oxides while non-metals on the right hand side form acidic oxides. The oxide of aluminium in the middle is amphoteric.
v) The oxides of period 3 elements do not conduct electricity. However, the metallic oxides on the lefthand side conduct electricity in molten state. The non-metallic oxides on the right hand side are molecular hence they do not conduct electricity under any circumstance.
When animals drink nectar from the flower and move the pollen is to___________________the flower?
Answer:
Pollinate, If i gave you the wrong answer, i'll improve my answer for you
Explanation:
pollination bc the animal rubs off the pollen to the other plant which causes to bloom better bc it comes from the other plant
Calculate the root - mean - square speeds of helium atoms and nitrogen molecules in m/s at 25° C
Answer: a) root - mean - square speeds of helium atom is 43.1 m/s
b) root - mean - square speeds of nitrogen molecule is 16.29m/s
Explanation:
The formula used for root mean square speed is:
[tex]\nu_{rms}=\sqrt{\frac{3RT}{M}}[/tex]
where,
[tex]\nu_{rms}[/tex] = root mean square speed
R = gas constant = [tex]8.314J/Kmol[/tex]
T = temperature = [tex]25^0C=(25+273)K=298K[/tex]
M = atomic mass
a) root - mean - square speeds of helium atom [tex](He)[/tex]
[tex]\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{4g/mol}}=43.1m/s[/tex]
b) root - mean - square speeds of nitrogen molecule [tex](N_2)[/tex]
[tex]\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{28.02g/mol}}=16.29m/s[/tex]
Which molecule or ion below would be expected to have a trigonal planar electron domain geometry?
a. nitrate ion, NO3 1-
b. at least two of these
c. carbon tetrachloride
d. water
e. sulfur dioxide
Answer:
a. nitrate ion
e. sulfur dioxide
Explanation:
Trigonal planar geometry, is possible, where the combination of atoms or lone pain form a triangle which is is same plane.
Hence, from the given options,
Nitrate ion has a trigonal planar geometry.Carbon tetrachloride has a teterahedral geometrywater has a bent angular geometry.sulfur dioxide has a trigonal planar geometry.Therefore,
From the given options, the correct answer is -
a. nitrate ion
e. sulfur dioxide
Which of the following is a potential exception to cell theory? Choose 1 answer: Fungal spore Asexual reproduction Mitochondria Amoebas
Answer:
Asexual reproduction
Explanation:
Cells are able to re produce themselves without other cells needed. If cells need others to make more then how would that work and plus we wouldn't have the theory of cells existing.
Which formula represents an ionic compound?
A)H2
B)CH4
C)CH3OH
D)NH4CI
If the theoretical yield of a reaction is 332.5 g and the percent yield for the reaction is 38 percent, what's the actual yield of product in grams? \
Answer:
for every
100 g
of product that can theoretically be produced by the reaction, you only get
71.7 g
of product.
Explanation:
What are a few ways your body maintains homeostasis?(6th grade and its science)
Answer: Internal Temperatures. Similarly, the cardiovascular, integumentary (skin and associated structures), respiratory, and muscular systems work together to help the body maintain a stable internal temperature. If body temperature rises, blood vessels in the skin dilate, allowing more blood to flow near the skin's surface.
Explanation:
Answer fast please?????????????
Answer:
option a. iron,copper, aluminium.
who know the song genius?
Answer:
Me
Explanation:
The one with sia??
Coal,oil,and natural gas are examples of earths _______
Fill out the blank
Answer:
non renewable resources
Explanation:
because they cannot be readily replaced