Answer:
Ag+(aq) + Cl-(aq) —> AgCl(s)
Explanation:
2AgNO3(aq) + CaCl2(aq) —>2AgCl(s) + Ca(NO3)2(aq)
The balanced net ionic equation for the reaction above can be obtained as follow:
AgNO3(aq) and CaCl2(aq) will dissociate in solution as follow:
AgNO3(aq) —> Ag+(aq) + NO3-(aq)
CaCl2(aq) —> Ca2+(aq) + 2Cl-(aq)
AgNO3(aq) + CaCl2(aq) –>
2Ag+(aq) + 2NO3-(aq) + Ca2+(aq) + 2Cl-(aq) —> 2AgCl(s) + Ca2+(aq) + 2NO3-(aq)
Cancel out the spectator ions i.e Ca2+(aq) and 2NO3- to obtain the net ionic equation.
2Ag+(aq) + 2Cl-(aq) —> 2AgCl(s)
Divide through by 2
Ag+(aq) + Cl-(aq) —> AgCl(s)
The, the net ionic equation is
Ag+(aq) + Cl-(aq) —> AgCl(s)
Which of the following processes absorbs energy? A) condensation of water on a wind shield of a car B) formation of copperC) ball rollinflown a hill D) formation of ice from liquid water
E) oxide from copper and oxygen
Answer:
C) ball rollinflown a hill
Explanation:
The question asks to identify the endothermic process in the list of options. By way of elimination, we have;
A) condensation of water on a wind shield of a car
Condensation is an exothermic process. That is, heat is given out as the gases change into the liquid state of matter.
B) formation of copper
This is an exothermic process. Capture of electrons by a cation is always exothermic.
C) ball rollinflown a hill
This is the correct option. Energy is absorbed by the ball as it moves on the hill
D) formation of ice from liquid water
Freezing is an example of exothermic reaction. Heat is given off to the surroundings.
E) oxide from copper and oxygen
Formation of metal oxides and most reactions involving oxygen are exothermic reactions,
Name three properties of matter that you can
measure using the metric system. Then give the basic
metric units used for each property.
Answer:
mass (gram), volume (litre) and length (metre)
Explanation:
Matter is usually defined as anything that has mass and can occupy space. Matter exists primarily in three forms; solid, liquid or as a gas. Some of the properties of matter and there corresponding metric units are listed below
Properties ⇒ Metric unit
Mass ⇒ gram
Volume ⇒ litre
length ⇒ metre
10g = __________ mg? *
Answer:
Explanation:
as we know that
1g =1000mg
so
10g=10*1000
10g=10000
An insoluble solid is placed in water and the system allowed to reach equilibrium. The ratio of the rate at which ions join the solution and the rate at which ions join the lattice will be:
Answer:
One.
Explanation:
Hello,
In this case, the equilibrium condition is characterized by the equality of the rates at which a process happen and the contrary process happen, so its ratio is 1. For instance, a chemical reaction at equilibrium will have a contant ratio of the velocity at which the products are formed and the reactants consumed
However, for the described insoluble solid that is allowed the reach equilibrium, the ratio of the rate at which ions join the solution and the rate at which ions join the lattice will be one since it reaches an equilibrium state.
Best regards.
The value of ΔG° (kJ/mol) at 25°C for the formation of phosphorous trichloride from its constituent elements: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) A) –59.2 B) +59.2 C) –642 D) +75.6 E) –373 F) –29.4
Answer:
F. [tex]\mathsf{\Delta G^0 \simeq -29.4 \ kJ}[/tex]
Explanation:
GIven that:
The chemical equation for the reaction is:
[tex]\mathtt{Fe_2O_{3(s)} + 3CO_{(g)} \to 2Fe _{(s)} + 3CO_{2(g)}}[/tex]
The value of the ΔG° (kJ/mol) at 25 °C
[tex]\Delta G^0 = \begin {pmatrix} 2( \Delta G_f^0 \ Fe_{(s)} )+ 3 ( \Delta G_f^0 \ CO_{2(g)} ) - 1 ( \Delta G_f^0 \ Fe_2CO_3_{(s)} + 3 ( ( \Delta G_f^0 \ CO _{(g)} ) \end {pmatrix}[/tex]
where;
[tex]\Delta G_f^0 \ Fe_{(s)} = 0[/tex]
[tex]\Delta G_f^0 \ CO_{2(g)} = -394.359 \ kJ/mole[/tex]
[tex]\Delta G_f^0 \ Fe_2CO_3_{(s)} = -742.2 \ kJ/mole[/tex]
[tex]\Delta G_f^0 \ CO _{(g)}= -137.168\ kJ/mole[/tex]
Replacing the values ; we have
[tex]\Delta G^0 = \begin {pmatrix} 2(0 )+ 3 ( -394.359 ) ) -( 1 (-742.2) + 3 (-137.168 ) \end {pmatrix}[/tex]
[tex]\Delta G^0 = \begin {pmatrix} 0 -1183.077 ) -(-742.2- 411.504 \end {pmatrix}[/tex]
[tex]\Delta G^0 = \begin {pmatrix} -1183.077 +742.2+ 411.504 \end {pmatrix}[/tex]
[tex]\mathtt{\Delta G^0 = -29.373 \ kJ}[/tex]
[tex]\mathsf{\Delta G^0 \simeq -29.4 \ kJ}[/tex]
What do viceroy butterflies use to look like poisonous Monarch butterflies?
They use something called Mullerian mimic so they will be protected from predators
Explanation:
Calculate the number of grams of deuterium in an 80,000-L swimming pool, given deuterium is 0.0150% of natural hydrogen
Answer:
[tex]m_{Deu}=2666.7g[/tex]
Explanation:
Hello,
In this case, we can apply the following mole-mass-density relationship in order to compute the required grams of deuterium, considering that it is the 0.0150% (molar basis) of natural hydrogen (H₂):
[tex]m_{Deu}=80000LH_2O*\frac{1000gH_2O}{1LH_2O}*\frac{1molH_2O}{18gH_2O} *\frac{1molH_2}{1molH_2O} *\frac{2gH_2}{1molH_2} *\frac{2*0.0150g\ Deu}{100gH_2} \\\\m_{Deu}=2666.7g[/tex]
Best regards.
Identify the major factor affecting reaction rates that accounts for the following observations:
a. Tadpoles grow more rapidly near the cooling water discharged from a power plant. 尤mpeca
b. Enzymes facilitate certain biochemical reactions but are not onsumed
c. Hydrogen peroxide antiseptic rapidly decomposes when applied to an open wound.
Answer:
a. Tadpoles possess the tendency to grow more rapidly close to the cooling water released from the power plant as the temperature is greater in these waters, permitting them to acquire more nutrients. Thus, in the given case, the factor is the temperature of the system.
b. In the given case, the factor is the catalyst, and in the given case enzymes are the biological catalyst. An enzyme increases the rate of the reaction as they lower the activation energy.
c. In the given case, the factor is the enzyme, as the blood comprises an enzyme, peroxidase, which catalyzes the decomposition of hydrogen peroxide.
3. A balloon is filled with a mystery fluid that has a mass of 1000 kg and a volume of
of |
500 mL.
A. What is the density of the fluid?
B. Will the balloon sink or float in water?
(Helpppp ppls)
Which statement illustrates how engineering has influenced society?
O A New, high-tech materials are used to make prosthetic limbs for
people who need them
O B. People expect that engineers will be able to continually improve
the designs of prosthetic limbs so that they can be even more
functional
O C. New, high-tech materials are used to make prosthetic limbs
because they are lighter, stronger, and more flexible than
traditional materials,
O D. People without a limb may desire new technologies to help them
perform everyday tasks easier
- PREVIOUS
Answer: It’s A.
A New, high-tech materials are used to make prosthetic limbs for
people who need them
Explanation: Took the test
The engineering has influenced society by a new, high-tech materials are used to make prosthetic limbs for people who need them. Therefore, option A is correct.
What is engineering ?Engineering is the design and construction of machinery, structures, and other things like bridges, tunnels, roads, cars, and buildings using scientific principles.
Engineers are specialists who create, design, analyze, construct, test, and evaluate machines, complex systems, buildings, gadgets, and materials to satisfy functional objectives and criteria while taking into account the practicality, regulation, safety, and cost constraints.
We have a wide range of engineering disciplines, many of which are highly specialized and created to address the great diversity of difficulties we confront. Chemical, civil, electrical, and mechanical engineering are the four primary categories into which engineering can be classified.
Thus, option A is correct.
To learn more about an engineering, follow the link;
https://brainly.com/question/19117846
#SPJ2
How does a lone pair distort the molecular shape?
O A. The lone pair forces bonding atoms farther from the nucleus.
B. The lone pair makes new bonds, changing the molecule's shape.
O C. The lone pair pushes bonding atoms closer to the nucleus.
O D. The lone pair forces bonding atoms away from itself.
SUBMIT
Answer:
The lone pair forces bonding atoms away from itself
Explanation:
According to Valence Shell Electron Pair Repulsion Theory (VSEPR), the shape of a molecule is determined by repulsions between electron pairs present in the valence shell of the central atom in a molecule.
Remember that electron pairs on the valence shell of the central atom in the molecule tend to position themselves as far apart from each other as possible. A lone pair takes up more space round the central atom than a bond pair. There is greater repulsion between a lone pair and a bond pair, this greater repulsion causes a distortion of molecular shape away from that predicted on the basis of VSEPR.
What is the answer, with the correct number of decimal places, for this problem? 4.392 g+ 102.40 g + 2.51 g=
A) 110 g
B) T09 g
C) 109.302 g
D) 109.30 g
E) 109.3 g
The correct answer with the correct number of decimal places and number of significant figures is 109.302 g.
What are significant figures?Significant figures are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.
The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:
1)All non-zero digits are significant .
2)All zeroes which occur between non-zero digits are significant.
3)All zeroes to the left and right of a non-zero digit are not significant.
4) All zeroes on right of decimal are significant if a non-zero number follows them.
5)All zeroes on right side of non-zero digit are significant.
Learn more about significant figures,here:
https://brainly.com/question/29153641
#SPJ5
A compound has an M-/M-2 ratio of 75:25. Which of the following could be the molecular formula of this compound? a) CH2Br2 b) CH2Cl2 c) CHCI d) CH:Bre) CHF
Answer:
c) CH₃Cl
Explanation:
Due the relative abundance of chlorine and bromine. It is possible to determine which of the halogens is present in a mass spectrum of a organic compound:
The Cl-35, Cl-37 have a relative abundance of 75/25; Br-79 and Br-81 of 50/50.
For that reason, if a compound has a M/M+2 ratio of 75:25 you can be sure the compound has 1 Cl in its structure. Thus, the only possible structure is:
c) CH₃Clmcat reddit when titanium is used in an artificial hip replacement how does acidosis affect the metal
Answer:
It has no effect on the metal.
Explanation:
Hello,
In this case, we must remember that metabolic acidosis is related with the presence of an excess of acidic substances in the blood as a result of higher levels carbon dioxide in the lungs or lower levels of bicarbonate in the blood as well. Nevertheless, since titanium is a metal unlikely to be chemically modified by those weak acids such as carbonic acid in the blood, we can infer that it has no effect on the metal when used in an artificial hip replacement.
Regards.
Given the following reactions, what is the overall enthalpy change for the following reaction?
NH_3(g) + HCl(g) right arrow NH_4Cl(s) .
Answer:
-176.0 kJ/mol
Explanation:
Let's consider the following balanced reaction.
NH₃(g) + HCl(g) → NH₄Cl(s)
We can calculate the standard enthalpy change for the reaction (ΔH°rxn) using the following expression.
ΔH°rxn = 1 mol × ΔH°f(NH₄Cl(s)) - 1 mol × ΔH°f(NH₃(g)) - 1 mol × ΔH°f(HCl(g))
ΔH°rxn = 1 mol × (-314.4 kJ/mol) - 1 mol × (-46.1 kJ/mol) - 1 mol × (-92.3 kJ/mol)
ΔH°rxn = -176.0 kJ/mol
If you had a box that you couldn't open, how could you find out what is inside?
Answer: use you imagination
Explanation:
if you don’t know and will never know, just guess
Answer:
Shake it, imagine whats in it, or leave it alone.
This is the net ionic equation for the complete neutralization of a generic diprotic acid with sodium hydroxide: H2A (aq) + 2 NaOH (aq) + 2 H20 (1) + Na2A (aq) a. OH- (aq) + H+ (aq) â H20 (1) b. 2 Na+ (aq) + A2- (aq) - Na2Cl (s) c. 2 OH- (aq) + 2 H+ (aq) + 2 H20
Answer:
c. 2 OH⁻(aq) + 2 H⁺(aq) ⇒ 2 H₂O(l)
Explanation:
Step 1: Write the molecular equation
The molecular equation includes all the molecular species.
H₂A(aq) + 2 NaOH(aq) ⇒ Na₂A(aq) + 2 H₂O(l)
Step 2: Write the complete ionic equation
The complete ionic equation includes all the ions and the molecular species.
2 H⁺(aq) + A²⁻(aq) + 2 Na⁺(aq) + 2 OH⁻(aq) ⇒ 2 Na⁺(aq) + A²⁻(aq) + 2 H₂O(l)
Step 3: Write the net ionic equation
The net ionic equation includes only the ions that participate in the reaction and the molecular species.
2 OH⁻(aq) + 2 H⁺(aq) ⇒ 2 H₂O(l)
Why does hot air rise and cold air sink?
A. Cold air has more kinetic energy than hot air.
B. Hot air has more potential energy than cold air.
C. Cold air is more dense than hot air.
D. Hot air is more dense than cold air.
Answer: C. Cold air is more dense than hot air.
Explanation: Took the test on edmentum
In an electron-dot symbol of an element, the dots are used to represent ________.
Answer:
Valence electrons.
Explanation:
Hello,
In this case, the electron dot structure is widely known for representing the valence electrons as dots placed around the chemical symbol and they are defined as the electrons configured at the outermost shell of the studied atom. Commonly, electrons are placed up to two on each side of the elemental symbol for a maximum of eight. For instance, sodium has one valence electron, sulfur has six valence electrons, helium has eight valence electrons and so on. Valence electrons are known to be dependent of the electron configuration.
Best regards.
Which of the following experimental methods cannot be used to measure the rate of a reaction?
a. measurement of the change in the partial pressure of a gas-phase reactant over time
b. measurement of the equilibrium concentration of an acidic product via titration with a strong base
c. measurement of the absorbance of a colored reactant with time
d. measurement of the absorbance of a colored product with time
e. measurement of the change in the partial pressure of a gas-phase product over time
f. none of the above can be used to measure the rate of the reaction
g. I don't know
Answer:
I think a is the best answer. but really I can not confirm that.sorry for that.
The experimental methods which cannot be used to measure the rate of a chemical reaction is: B. measurement of the equilibrium concentration of an acidic product via titration with a strong base.
A chemical reaction can be defined as a chemical process which involves the continuous transformation (rearrangement) of the ionic, atomic or molecular structure of a chemical element by breaking down and forming chemical bonds, so as to produce a new chemical compound.
The rate of a reaction is also known as reaction rate and it refers to the speed at a which the reactants in a chemical reaction are transformed into products. Some of the factors that affect the rate of a reaction are:
TemperatureCatalystConcentration of reactantsPressureIn Chemistry, an experimental method which cannot be used to measure the rate of a chemical reaction is the measurement of the equilibrium concentration of an acidic product by titrating it with a strong base because the concentration of product always remain the same.
Read more: https://brainly.com/question/18296054
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C 6H 5CO 2H) and 0.15M sodium benzoate (C
Answer:
[tex]pH=3.97[/tex]
Explanation:
Hello,
In this case, for the calculation of the pH of the given buffer we need to use the Henderson-Hasselbach equation:
[tex]pH=pKa+log(\frac{[base]}{[acid]} )[/tex]
Whereas the pKa for benzoic acid is 4.19, the concentration of the base is 0.15 M (sodium benzoate) and the concentration of the acid is 0.25 M (benzoic acid), therefore, the pH turns out:
[tex]pH=4.19+log(\frac{0.15M}{0.25M} )\\\\pH=3.97[/tex]
Regards.
What is the sand and water mixed together in a beaker called
Answer:
Explanation:
the sand and water mixed together in a beaker is known as heterogeneous mixture. it is type of mixture in which the constituents are not distributed uniformly
What is the mass of 10.0 cm the 3rd power of water
If you mean cubic cm, then it will be about 10 grams
A wooden block has a mass of 20 g and dimensions of 5 cm x 1 cm x 1 cm.
A. What is the volume?
B. What is the density?
(Helppp)
Answer:
V = 5 cm³
ρ = 4 g/cm³
Explanation:
Step 1: Calculate the volume (V)
We have a wooden cuboid of dimensions 5 cm × 1 cm × 1 cm. We can calculate its volume using the following expression.
V = 5 cm × 1 cm × 1 cm
V = 5 cm³
Step 2: Calculate the density (ρ)
The density is equal to the mass divided by the volume.
ρ = m / V
ρ = 20 g / 5 cm³
ρ = 4 g/cm³
A match is lit and held under a cold piece of metal. The following observation are made.A) the match burnsB) the metal gets warmerC) water condenses on the metalD) soot (carbon) is deposited on the metal.Which of these occurrences are due to physical changes and which are due chemical changes?
Answer:
A - chemical changes
B - Physical changes
C - Chemical changes
D - Chemical changes
Explanation:
First and foremost, a chemical change is an irreversible change in the chemical properties of a substance leading to the formation of a new substance or substances while a physical change is a reversible change to the properties of a substance.
The burning of a match stick is an irreversible process involving the reaction of the various component of the match head (potassium chlorate, sulfur, glass powder) with that of the side of the box holding the match (phosphorus, binder, glass powder). Hence, it is considered a chemical reaction.
Warming of the metal is a reversible process and hence, a physical reaction. Warming involves a rise in temperature due to the heating. Once the heat source is removed and the metal allowed to stay for a while, its temperature will return back to the original temperature.
Water condensation and deposition of soot on the metal can be considered a chemical reaction. A reaction that leads to the formation of, at least, one new product is definitely a chemical reaction.
When a 235 92U 92235U nucleus is bombarded by neutrons (10n01n) it undergoes a fission reaction, resulting in the formation of two new nuclei and neutrons. The following equation is an example of one such fission process: 235 92U+10n→AZBa+9436Kr+310n 92235U+01n→ZABa+3694Kr+301n Enter the isotope symbol for the barium (BaBa) nucleus in this reaction. Express your answer as an isotope.
Answer:
139/56 Ba
Explanation:
In writing nuclear equations, there must be a balance of the mass and charge on both sides of the reaction equation. That is, the sum of masses on the lefthand side of the nuclear reaction equation must equal the sum of masses on the righthand side of the nuclear reaction equation. Similarly, the charges on the lefthand side of the nuclear reaction equation must equal the sum of the charges on the right hand side of the nuclear reaction equation.
Hence, the isotope of barium formed in the equation mentioned in the question is 139/56 Ba.
Do all living things have cells?
Answer:
Yes
Explanation:
All living things do have cells
Answer:
yes they all have to have cells for every living thing
Explanation:
if their was no cells in existence all the living will soon to be dead.
A student in a chemistry lab is conducting an experiment using chemicals. Several violations were observed by the instructor. Which of the following methods below would best prevent a contamination of chemicals in the eyes?
Answer:
I would suggest wearing safety glasses as it minimizes the chance of harmful chemicals entering the eyes
Explanation:
The MSDS for benzene indicates that it is a clear liquid that has a substantial vapor pressure. It has a health rating of 2, a fire rating of 3, and a reactivity rating of 0. It is a cancer-causing agent. Based on this information, which statement about benzene is accurate?
Answer:
Benzene must be kept away from flames.
Explanation:
Edguenuity 2020
The most accurate statement about Benzene is : Keep Benzene away from flames.
Although your question is incomplete a general answer is provided based on the MSDS provided in the question
Benzene is a colorless gas that exhibits a high level of flammability, it also has a sweet odor just like gasoline, it is a cancer-causing agent when humans are exposed to it for too long. based on its flammability it is advisable to keep flammable materials and flammable sources ( flames ) away from Benzene. and to also reduce the rate of human exposure to benzene as well.
Therefore we can conclude that based on the MSDS provided in the question the most accurate statement about benzene is Benzene should be kept away from flames.
Learn more :https://brainly.com/question/14408817
Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up in this way. He placed
900 ml of water into each of five 1000 ml glass beakers. To each beaker he added 5 ml of water from an aquarium which contained a large concentration of
algae. The beakers were placed under a grow light which was timed to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the
following amounts: Beaker A-8 mi fertilizer, Beaker B - 6 ml fertilizer, Beaker C - 4 ml fertilizer, Beaker D-2 mi fertilizer, and Beaker E - no fertilizer. Each
week a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.
What is the independent variable in this experiment?
O hours of daylight
O amount of water
O amount of fertilizer
O number of algal cells
Answer:
amount of fertaliser--> the independant variable is the one being changed