Answers
Answer:
hshzjndbejkxn. znkskakannamzm msk
Related Questions
What is the molar mass of methane (CHA)?
A. 16.05
grams
O B. 13.02 grams
O C. 49.05 grams
O D. 10 grams
Answers
Which of the following are Cations? (Select all that apply)
K(+)
O(2-)
Cl(-)
NH4(+)
Al(3+)
OH(-)
Answers
Answer:
k(+)
NH4(+)
Al3(+)
Explanation:
cations are those elements who donate their electrons and we put a positive charge on it and receivers get negative charge and they are called anion.....Thank you so,much Please let me know how you feel and is helps you or not....
Please help! I really need help on this!
Answers
Answer:
I wanna say c
Explanation:
It makes the most sense, because non-metals don't produce an electrical current, and therefore aren't conductors.
How does a material get a positive charge?
Answers
May God bless you
How does a material get a negative charge?
Answers
Explanation:
When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge.
How do spines help a cactus survive?
A:They protect the plant from being eaten by animals.
B:They anchor the plant to the ground.
C:They hold the plant upright and help it take in sunlight.
D:They take in sunlight and carry out photosynthesis.
Answers
When she placed her hand on the side of the container, it felt really cold, but it didn't feel that way before. The temperature had dropped by about 30 degrees Celsius. The substance was now grey and crystallin in structure.
Was this a chemical reaction?
Answer the question (in a complete sentence) Provide evidence to support your claim and describe (reasoning/justify) how the evidence supports the claim.
Answers
Answer:
this is a physical reaction
Explanation:
Answer:
this is a physical reaction
Explanation:
Which element is most likely to have an oxidation number of +3?
Α. Ν
B. AI
C. Mg
D. S
Answers
Answer:
Option B because aluminum has valence 3±
In a dynamic equilibrium between the liquid state and the gas state, the rate of evaporation
A. is greater than the rate of condensation
B. is less than the rate of condensation
C. is equal to the rate of condensation
Answers
What is a responding variable
Answers
Answer:
A manipulated variable is also called an independent variable. A responding variable is a variable that the researcher predicts will change if the manipulated variable changes. A responding variable is also called a dependent variable.
Identify the error in this statement: “If a reaction transfers energy to the surroundings the product molecules must have more energy than the reactants”
Answers
Answer:
See explanation
Explanation:
A reaction may be exothermic or endothermic. In an exothermic reaction, energy is given out from the reaction system. This means that energy is transferred to the surroundings and the reactants have more energy than the products.
A reaction in which energy is absorbed from the surroundings is called an endothermic reaction. In this case, the products have more energy than the reactants.
So the statement "If a reaction transfers energy to the surroundings the product molecules must have more energy than the reactants” is erroneous. The error in the statement is the part that says "...the product molecules must have more energy than the reactants”. It ought to have read, "the reactants have more energy than the products" in accordance with the explanation above.
Express the percent composition of each
element in C10H8.
Answers
Answer:
Element Symbol Mass percent
Carbon C 93.7088
Hydrogen H 6.2912
2. Calculate the number of moles of propane you have in 5.78 x1024 molecules of propane = CH
Answers
Answer:
Molar mass of C3H8 = C 3 (12.01 g/mol) = 36.03 (g/mol)
H 8 (1.008 g/mol) = 8.064 (g/mol)
44.09 (g/mol)
74.6 g propane x 1 mole propane x 6.022 x 10
23
molecules
44.09 g propane 1 mole propane
= 1.02 x 10
24 molecules propane
Explanation:
If a five-cent coin is made of 25% copper and 75% Nickel, determine the mass of Nickel and Copper in the coin.
Answers
Answer:
3.75g of Ni and 1.25g of Cu
Explanation:
The five-cent coin of Unit States has a mass of 5.000g. To find the mass of each atom we have to multiply the total mass times the percentage of each atom (Nickel and Copper). That is:
Mass Nickel:
5.000g * 75% = 3.75g of Ni
Mass Copper:
5.000g * 25% = 1.25g of Cu
what type of force do you use when your brush your teeth? Is the force balanced or unbalanced?
Answers
Answer:
balanced forced
Explanation:
why would a pregnant mother need more calcium than a woman her age that is not pregnant?
Answers
Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.
Calcium is a vital mineral. Your body uses it to build strong bones and teeth. calcium is also needed for your heart and other muscles to function properly
Please help will give brainless and 10 points each balance the equation
Answers
Answer:
Barium Chloride + Aluminum Sulfate = Barium Sulfate + Aluminum Chloride
Explanation:
Hopefully this helps you!!
Don't be afraid to correct me if i'm wrong! :)
(25 POINTS AND BRAINLIEST)What is the volume of 2 mol of chlorine gas at STP?
2.0 L
11.2 L
22.4 L
44.8 L
Answers
Answer:
44.8
Explanation:
According to standard temperature and pressure and ideal gas equation , the volume of 2 mole of chlorine gas at STP is 44.8 liters.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.
These values are important to physicists, chemists ,engineers ,pilots and navigators.On substituting values in ideal gas equation, volume= 2×8.314×273/1=44.8 liters.
Thus, the volume of 2 mole of chlorine gas at STP is 44.8 liters.
Learn more about standard temperature and pressure , here:
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2. Clouds are
(a) tiny drops of water floating in air.
(b) mixture of dust and water vapour.
(c) particles of water vapour.
(d) rain drops in air.
3. Floods cause extensive damage to
(a) crops.
(b) property and human life.
(c) domestic animals.
(d) all of the above.
4. “Catch water where it falls” is the basic idea behind
(a) Recycling of water.
(b) Making dams to store water.
(c) Rain water harvesting.
(d) Condensation of water vapour.
5. In which of the following case evaporation of water will be slowest?
(a) A tray of water kept in sunlight.
(b) A kettle of water kept on a burner.
(c) A glass of water kept in a room.
(d) A bucket of water kept on rooftop.
Answers
Answer:
2 b
3d
4c
5c
Explanation:
please give brainlest
BRAINLIEST!
How do the ions in metals behave?
a They are negatively charged.
b They are repelled by electrons.
c They are attracted to each other.
d They are repelled by each other.
Answers
Answer:
attracted towards each other
Explanation:
hope u like the ans
Answer:
The ions in metal behavior by repelled by electro
Why do waves move faster at higher temperatures and in a solid phase?
There is more energy and the particles are farther apart.
There is less energy and the particles are closer together.
There is less energy and the particles are farther apart.
There is more energy and the particles are closer together.
Answers
Answer:
Higher temperatures means more energy, and a solid phase means the particles are close together. This results in highly energized particles that bump into the particles close to them, who in turn bump into more particles.
Explanation:
waves move faster at higher temperatures and in a solid phase there is more energy and the particles are farther apart there is less energy and the particles are closer together there is less energy and the particles are farther apart there is more energy and the particles are closer together.
The waves move faster at higher temperatures and in a solid phase because there is more energy and the particles are closer together.
What is wave?A wave can be described as a medium which transports energy without causing net particle movement. Elastic deformation, pressure change, electric along with magnetic intensity, electric potential, or temperature can all be examples.
What is energy?The quantitative property that's also transferred to a body or a physical system, recognizable in the work performance as well as in the form of heat and light, is called energy.
What is temperature?Temperature is the measurement of a body's degree of hotness or coolness.
The faster the wave is conveyed, the greater the particle interactions are. In general, sound travels quicker through solids than through liquids, and faster through liquids than through gas. Because warmer particles move at a higher pace, the temperature actually speeds up to sound.
Therefore, the correct answer will be option (d).
To more about wave and energy .
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What is the enzyme that breaks down sugar ??
Answers
Answer:
sucrase-isomaltase
Explanation:
Volume of 8.625 g of sulphur di oxide at RTP in cm3
Answers
Answer:
The volume of 8.625 g of sulphur dioxide at RTP is approximately 3,230.84 cm³
Explanation:
The question requires the determination of the volume occupied by the gas based on the molar volume of a gas at STP
The given parameters of the sulphur dioxide, SO₂, gas are;
The mass of the given SO₂ gas = 8.625 g
The molar mass of SO₂ = 64.07 g/mol
The number of moles, 'n', in the given sample of SO₂ gas = Mass of SO₂/(Molar Mass of SO₂)
∴ The number of moles of SO₂ in the gas sample = 8.625 g/(64.07 g/mol) ≈ 0.134618386 moles
The molar volume of a gas at RTP is approximately 24 dm³/mole
24 dm³ = 24,000 cm³
∴ The molar volume of a gas at RTP is approximately 24,000 cm³/mole
The volume occupied by a gas at RTP = (The number of moles of the gas) × (The Molar Volume of a gas at RTP)
∴ The volume occupied by the 8.625 g of SO₂ gas at RTP = 0.134618386 moles × 24,000 cm³/mole ≈ 3,230.84 cm³
The volume occupied by the 8.625 g of SO₂ gas at RTP ≈ 3,230.84 cm³.
6. Which of the following best describe the graph of linear inequalities in two
variables?
A. Straight line
C. Half-plane
B. Parabola
D. Half of a parabola
7. Which of the following inequalities is represented by the given
graph?
A. 2x + 2y > 2
C. 3x + 2y > 2
B. 3x + 2y = 2
D. 3x - 2y < 2
1
8. An inequality using a < or > has a line.
A. horizontal
C. solid
B. broken
D. vertical(h).
9. Which is the correct inequality for the shaded region?
A. y = - x - 1
C. y > -x - 1
B. y <- x + 1
D.y > x - 1
10.What type of line and what way would you shade with the sign "<"?
A. broken, shaded up
C. broken, shaded down
B. solid, shaded up
D. solid, shaded down
11. Given the graph of y? 2x - 5 below, which of the following
ordered pair satisfies the inequality?
A. (2,-5)
C. (-2,-7)
B. (5,2)
D. (5,-7)
I gave brainlest ...
Answers
Answer:
I hope I can help youExplanation:
I hope I can help youAs per the following graph that best describes the linear inequality in two variables is included in a straight line.
The linear inequality divided the coordinates plane into two halves. Here one half represents the solution and the other the inequality. Hence the option A is correct. The inequality that is represented by the graph is 3x + 2y = 2, Hence option B is correct. The correct inequality for the shaded region is y <- x + 1, hence the option C is correct. The line and shade with the sign "<" means that they are broken and shaded up. Hence the option A is correct. The given graph consists of equation 2x - 5 where to find Y in order of the pairs that satisfy the inequality are (5,2) hence the option B is correct.Learn more about which of the following is best described.
brainly.ph/question/8809815.
what is an example of decomposition?
Answers
Answer:
Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
Explanation:
♡
can someone please help me with this, i'll give you a 5 star rating and the brainliest answer!
Answers
Answer:
A. equation
B. atoms
C. products
Explanation:
Answer:
A
A chemical equation shows both the reactants and the products of a chemical equation
1. What makes carbon such a unique element?
A Carbon forms covalent bonds rather than ionic bonds
B Carbon has two stable isotopes, carbon-12 and carbon-13
C. Elemental carbon comes in two forms, diamond and graphite
D To a greater extent than any other element carbon can bond itself to form straight
chains, branched chains and rings
Answers
Answer:
Carbon plays a unique role among the chemical elements. ... Due to its four valence electrons, carbon is the smallest element that is able to make covalent bonds to four different atoms in its neutral form.
________ cm = 3.34 m
Answers
Answer:
334
Explanation:
multiply the length value by 100
Multiple length by value
.
30 POINTS AND BRAINLIEST IF CORRECT!
When does a polar bond result?
a When opposite charges are formed between ions in a covalent bond.
b When there is an unequal sharing of electrons in an ionic bond.
c When there is an unequal sharing of electrons in a covalent bond.
d When opposite charges are formed between ions in an ionic bond.
Answers
Pure metals are _____.
used less often than alloys
are more resistant to corrosion than alloys
used more often than alloys
harder than alloys
Answers
Answer:
Pure metals are those metals that have not been alloyed with other metallic elements; commercially pure metals are 99% pure minimum.
Explanation: