Answer:
The answer is different for other people so look out.The answer here is C. The metal of the wires must be in contact with the terminals of a battery.
Explanation:
I took the quiz.
The metal of the wire must be in contact with the terminals of a battery so that, electrons can easily pass through and generate the electrical current.
What is electrical insulation?An electrical insulation is used to prevent the passage of electricity through an object. The materials which does not conduct electrically at any condition is called insulators.
Insulators are used as protective envelopes over the conducting bodies to resist the electrical shock and shortage of electricity. The electrical wires of circuits are coated with insulating plastics throughout up to the terminals.
The terminals cannot be insulated because, the passage of electricity to external circuit can only be achieved by conducting ends otherwise insulation will resist the passage of electrons to the battery. Thus, option C is correct.
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which type of experiment follows ethical standars?
A.Releasing contaminated waste into water system?
b. perfoming test on animals when the information can be obtained in other ways?
c. doing research on animals in which the animal experiences to fear or pain.
d. perfoming tests on people who cannot protect themselfs?
Answer:
A.Realesing contaminated waste into the water system
Explanation:
because if you you try it would really work
CAN SOMEONE PLEASE HELP ME I would appreciate it so much
Lab:Charles Law Data
According to Boyle’s law, when the pressure of a gas increases at constant temperature, its volume
Answer:
reduces
Explanation:
According to Boyle's law, when the pressure of a gas increases at constant temperature the volume reduces.
Boyle's law states that "the volume of fixed mass of a gas is inversely proportional to the change in pressure if the temperature is constant".
It suggests that at constant temperature, if pressure increases, temperature reduces.Mathematically, it is expressed as;
P1 V1 = P2 V2
P and V are pressures
1 and 2 are initial and finals state.
Boyle's law is stated for the ideal gas at a constant temperature. According to Boyle's law, with an increase in pressure, the volume of the gas decreases.
What is an ideal gas?The ideal gas is given as the gas in which the interatomic collisions are zero, and the changes are produced with the collisions to the walls.
Boyle's law is stated as the gas is at a constant temperature. According to the ideal gas, the pressure and volume are inversely related.
With the increase in pressure, the volume of the gas decreases and vice versa.
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Water contains 2 polar bonds and the molecule is polar
True
False
An atom is defined as the smallest part of an element that...?
Answer:
takes part in a chemical reaction
Explanation:
An atom is defined as the smallest part of an element that takes part in a chemical reaction.
When chemicals react, they simply exchange their atoms and recombine to form compounds where the atoms inside of them have a stable configuration.
In a chemical reaction, atoms are not broken down to simpler forms. Chemical reactions do now break down atoms. By losing, sharing or gaining of electrons, atoms simply form compounds and molecules.A scientist wants to determine the best light wavelength for growing plants. He grows plants in four test groups as shown in the table below. What, if anything, was wrong with the experiment? A. He should only grow one plant in each group.
B. He should only change the wavelength of light for each group.
C. He should add a control group with a CO2 level of zero ppm and a light intensity of zero percent.
D. There is nothing wrong with the experiment.
Answer:
where is the table..............
Answer:
B
Explanation:
I just took the test.
What else is produced during the replacement reaction of silver nitrate and potassium sulfate? 2AgNO3 + K2SO4 Ag2SO4 + ________
Answer:
c
Explanation:
Answer:
c
Explanation:
How many moles of NH₃ can be produced from 4.81 moles of nitrogen in the following reaction:
N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)
Answer:
9.62moles of NH₃
Explanation:
Given parameters:
Number of moles of nitrogen = 4.81moles
Unknown:
Number of moles of NH₃ = ?
Solution:
To solve this problem, we need to establish a balanced reaction equation:
N₂ + 3H₂ → 2NH₃
Now, we can solve the problem by working from the known to the unknown.
1 mole of N₂ produced 2 moles of NH₃
4.81moles of N₂ will produce 2 x 4.81 = 9.62moles of NH₃
Why series fatty acid carbons seen in double from?
Please help, im really confused. ill mark brainliest
Answer:
Fossils of the same animals have been found on South America and on Africa.
Africa and South America look as if they could be fit together perfectly (they almost can!)
Explanation:
Basically, the idea is that South Africa and Africa were once the same landmass. The same animals lived in that landmass, but when they broke off, then the animals were on different continent, yet they came from the same place.
GIVING BRAINLIEST!
What kinds of observations can you make that might indicate a chemical change is taking place?
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
Precipitate (formation of a solid)
Hope this helps!:)
How many grams of KOH are required to prepare 500. mL of 0.450 KOH solution?
Answer:
KOH molar mass = 39 + 16 + 1 = 56g
To make 1 L of 1M soln needs 56g KOH
To make 500mL 1M needs 56/2 = 28g
To make 500mL 0.2M needs 28 x 0.2gn:
Explanation:
The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm
What is Molarity ?Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.
Molar mass of KOH = 39 + 16 + 1 = 56g
To make 1 L of 1M soln needs = 56g KOH
To make 500mL 1M needs 56/2 = 28g
To make 500mL 0.450 M needs = 28 x 0.450
= 12.6 gm
Therefore, The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm.
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250 ml glass of lemon juice contains 20 grams of sugar. How much sugar is in 500 ml bottle
-flemon juice?
[0.5) * BS
0.5 Points)
There is 40 g of sugar in a 500 ml bottle of lemon juice
Further explanationThe concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
the concentration of sugar in lemon juice :
[tex]\tt \dfrac{20~g}{250~ml}=0.08~g/ml[/tex]
So for 500 ml juice :
[tex]\tt 500\times 0.08=40~g~sugar[/tex]
Andy rides a a speed of 8 miles per hour. How far does he ride in 3 hours?
Answer:
The answer is 24 miles.
Explanation:
Every hour he rides 8 hours. If he rides for three hours you can take 8 miles x 3 hours which is 24 miles.
The speed of the riding is 8 miles/hours . Within a time of 3 hours Andy will go for a distance of 24 miles.
What is speed?Speed is a physical quantity which measures the distance covered per unit time. The rate of speed is called velocity both having the units m/s, km/hr, miles/hr etc.
Speed is directly related to the distance covered. As the speed increases, distance covered by the object also increases. Whereas as the time increases, distance covered will decreases.
Given the speed of ride = 8 miles/s
time = 3 hours.
Distance = speed × time.
= 8 miles/ hr × 3 hours
= 24 miles.
Therefore, Andy will reach out a distance of 24 miles within 3 hours when ride with a speed of 8 miles/s.
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Which groups on the periodic table represent the s- block ?
Answer:
Groups 1 and 2.
Explanation:
The elements of Group 1 and Group 2 of the modern periodic table are called S block elements. The two types of s block elements are possible i.e. the elements with one electron (s1) or the elements with two electrons (s2) in their s-subshell.
For an aqueous solution of sucrose (C12H22O11), determine: (a) the molarity of 3.30 L of a solution that contains 225.0 g of sucrose M (b) the volume of this solution that would contain 4.30 mole of sucrose L (c) the number of moles of sucrose in 1.00 L of this solution mol C12H22O11
Answer:
a) Molarity = 0.199M
b) 21.6L of solution
c) 0.199 moles of sucrose in 1L
Explanation:
a) Molarity is the ratio of moles of solute (sucrose) in volume of solution (3.30L):
Moles sucrose -Molar mass: 342,3g/mol-:
225.0g * (1mol / 342,2965g) = 0.6573 moles
Molarity = 0.6573 moles / 3.30L
Molarity = 0.199Mb) 0.199M means 0.199 moles in 1L. 4.30 moles are in:
4.30 mol * (1L / 0.199mol) = 21.6L of solution
c) By definition, there are 0.199 moles of sucrose in 1L. This is the meaning of 0.199M
HOW TO CALCULATE MOLARITY:
The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume. That is:Molarity (M) = no. of moles ÷ volumeQUESTION A:
Molar mass of C12H22O11 = 342.3 g/molno. of moles = 225g ÷ 342.3g/mol = 0.66molMolarity of sucrose = 0.66mol ÷ 3.30L = 0.2MQUESTION B:
Volume = no. of moles ÷ molarityVolume = 4.30 mol ÷ 0.2M = 21.5LQUESTION C:
no. of moles = molarity × volume no. of moles = 0.2M × 1Lno. of moles = 0.2molLearn more at: https://brainly.com/question/8732513?referrer=searchResults
Are bonds broken or formed, throughout each phase change present on a heating
curve?
Answer:
sipi
Explanation:
got the answer, so in other words, I'm good.
Answer:
Brainliest?
Explanation:
pls!!!!!
In Rutherford's Gold Foil Experiment, he discovered ? O neutrons O Protons O nucleus O electrons 4 5
Answer:
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Acetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen gas, producing carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 0.095 of carbon dioxide. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Answer:
0.12 mol O₂
Explanation:
Step 1: Write the balanced combustion reaction
C₂H₂ + 2.5 O₂ ⇒ 2 CO₂ + H₂O
Step 2: Establish the appropriate molar ratio
We want to know the moles of oxygen needed to produce 0.095 moles of carbon dioxide. The molar ratio of O₂ to CO₂ is 2.5:2.
Step 3: Calculate the moles of oxygen needed to produce 0.095 moles of carbon dioxide
0.095 mol CO₂ × 2.5 mol O₂/2 mol CO₂ = 0.12 mol O₂
Which three types of reactions yield a product that is a chemically bonded combination of reactants? replacement, polymerization, decomposition polymerization, decomposition, oxidation decomposition, synthesis, replacement oxidation, synthesis, polymerization
Answer:
oxidation, synthesis, polymerization
Explanation: I took the test
The three types of reactions are product that is a chemically bonded combination of reactants are oxidation, synthesis, polymerization
A chemical reaction is often described as when two or three elements are combined together to form a compound. The product of oxidation, synthesis, polymerization are simply said to chemically bonded because they are composed of different reactants (elements) that are combined together to form another.Conclusively, we can therefore say that the three types of reactions are product that is a chemically bonded combination of reactants are oxidation, synthesis, polymerization
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5. Rust (Fe2O3) is produced when iron (Fe) reacts with oxygen (O2). Calculate the number
of grams of rust produced when 12 gram of iron react with oxygen.
Answer:
mole ratio = Fe:O2 = 2 : 3
36 grams of iron = how many moles?
well, 36/56 = 0.64 moles
multiply this by 1.5 =0.96 moles
this * 16 =15.43 grams
According to stoichiometry and balanced chemical equation of iron and oxygen 17.15 g of rust is produced when 12 g iron reacts with oxygen.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
The balanced chemical equation for formation of rust when iron reacts with oxygen is,
4 Fe + 3 O₂[tex]\rightarrow[/tex] 2 Fe₂O₃
223.36 g of iron produces 319.38 g of rust
∴ 12 g iron will produce 12×319.38/223.36= 17.15 g of rust.
Therefore, 17.15 g rust is produced from 12 g iron when it reacts with oxygen.
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The initial concentration of reactants in a first order reaction is 0.27 M. The rate constant for the reactio is 0.75 s^-1. What is the concentration of reactants after 1.5sec?
Answer:
Final concentration = 0.019 M
Explanation:
Initial Concentration [A]o = 0.27M
Rate constant, k = 0.75 s^-1
Final concentration [A] = ?
Time, t = 1.5s
The relationship between the variables is given by the equation;
ln[A] = ln[A]o - kt
ln[A] = ln(0.27) - (0.75)(1.5)
ln[A] = - 1.309 - 1.125
ln[A] = - 2.434
[A] = 0.019 M
Choose the formula for ammonium.
ΝΗ,
b NH3
C
(NH)3N
Answer:
NH4+ will be ammonium, NH3 is ammonia which is the conjugate base of ammonium.
Explanation:
Hi, I could really use your help. The question is Which of the products would you anticipate being formed in the least molar quantity? That is, which of the products (1, 2, or 3) is the minor product? Explain your choice. HINT: Consider the intermediates formed.
Answer:
Number 1 will be in the lowest molar quantity b/c formation of 1st order products are more difficult to form than secondary (#2) or tertiary (#3) substitution products.
Explanation:
In general, if a substitution occurs such that it is attached to a carbon that's attached to only one carbon, it is referred to as a primary carbon substitution. If a substitution occurs on a carbon that is attached to two (2) carbons, it is a secondary carbon substitution. Finally, if a substitution occurs such that it is attached to a carbon that's attached to three (3) carbons it is a tertiary substitution. Typically, primary substitution products follow an Sn2 type reaction pathway. Such requires the formation of only one intermediate that difficult to form as compared to 2° or 3° intermediates. Once formed, however, they will be very unstable and proceeds to product very quickly. Such produce very low product yield. The intermediates for 2° and 3° form more easily and are more stable in the reaction environments. An example is tertiary butyl halogens (e.g., t-butyl chloride) follow and Sn1 type reaction pathway forming a tertiary carbocation which then reacts with a nucleophile of choice and forms much higher yields than the 1° carbon substitution reactions. Suggest reviewing Sn2 and Sn1 substitution reactions.
Si, C, Ni which one is higher in ionization energy?
Answer:
I hope your having a good day, here is the answer to your following question:
C is the most highest energy...i just looked at a Periodic Trends — Ionization Energy
If i get it Right give brainlest
Explanation:
at what temp does h2o melt
Answer:
32 degrees fahrenheit
Explanation:
What best describes the reactants and products in a reaction at equilibrium?
more reactants form than products
they form at equal rates
more products form than reactants
they form equal amounts
Answer: they form at equal rates
Explanation:
By definition, at equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction.
what are tiny cell structures that carry out specific functions within the cell?
Answer: organelles
Explanation:
Similar to the way your stomach, lungs, and heart have different functions in your body, each organelle has a different function within the cell.
Type your answer in decimal form. Do not round.
2/5 tons = pounds
When determining a body's mass, the most popular units to employ are pounds (lb) and kilograms (kg). For correct trade, engineering, and scientific study, accurate conversion between these two is therefore crucial. Here 2/5 tons is 881.84 pounds.
Scales are used in numerous ways to determine a body's weight or mass. To measure various items of various sizes, various sorts of scales are utilized. As the measure of an object's weight, pounds are used. In Britain, this style of weighing in pounds is typical. Additionally, it can be written as Lb or Lbs.
Here 1 tons = 2204.62 pounds
Thus 2/5 tons = 2/5 × 2204.62
2/5 tons = 881.84 pounds
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