Which of these statements is true?
1. Electrons reach higher energy levels when they move closer to the nucleus.
2. An electron can absorb energy only from light.
3. The spectrum of hydrogen consists of all frequencies of radiation.
4. The emission spectrum of each element is unique
Alkenes provide many ways for incorporating oxygen atoms at specific locations in our molecule.
a. True
b. False
Answer:
True
Explanation:
Answer:
True
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Please help answer this Guy's HELP it's very Important
Answer:
Explanation:
1. HCl helps breakdown,absorb and digest food and also destroy bacterias in the stomach.
2. Organic Matter promotes good soil structure and act as reservoir of nutrients in the soil.
3. The nature of the solution is Basic
Reason... Blue litmus will remain blue in a basic solution and turn Red in an acidic solution
4. There's a number of test available for her to use but preferably... She should use the Litmus paper test. That's easier. An acidic solution will Turn a blue litmus red while the blue litmus will retain its blue color in a basic solution.
33. Convert the following word equations into balanced formula
equations
a. Potassium chloride Potassium chloride + Oxygen
b.Zinc + Sulphuric acid --Zinc sulphate + Hydrogen
c. Calcium carbonate calcium oxide + carbon dioxide
34. Derive Fama where all symbols have their usual meaning.
Answer:
a. KClO₃ ⇒ KCl + 1.5 O₂
b. Zn + H₂SO₄ ⇒ ZnSO₄ + H₂
c. CaCO₃ ⇒ CaO + CO₂
Explanation:
We will convert the following word equations into formula equations and then balance them using the trial and error method.
a. Potassium chlorate (I fixed a mistake here) ⇒ Potassium chloride + Oxygen
KClO₃ ⇒ KCl + O₂
We can balance this equation by multiplying O₂ by 1.5.
KClO₃ ⇒ KCl + 1.5 O₂
b. Zinc + Sulphuric acid ⇒ Zinc sulphate + Hydrogen
Zn + H₂SO₄ ⇒ ZnSO₄ + H₂
This equation is already balanced.
c. Calcium carbonate ⇒ calcium oxide + carbon dioxide
CaCO₃ ⇒ CaO + CO₂
This equation is already balanced.
One method of increasing the chances of particles colliding during a reaction is to...
1)decrease temperature
2) decrease concentration
3)increasing concentration
4)use a catalyst
Answer:
3
Explanation:
Increasing concentration
Which climate condition will cause the fastest chemical weathering of granite sandstone and shale
Answer:
1. Tropical Climate
Explanation:
Due to the high heat in tropical climates, the moisture speeds up chemical weathering
How many moles of lithium Sophie are in a simple with the number of atoms shown below?
2.94 x 10^23
a 0.0698
b 0.244
c 0.488
d 0.944
why do we have to write the background of the study
Answer:
Writing down background information can help you to remember what you learned and can be used for notes in the future when taking an assessment.
Explanation:
Can I get brainliest? It's for a challenge
What is the volume of the gas if there are 3.20 mol of gas at 265 K and 2.50 atm of pressure?
Answer:
27.81 L
Explanation:
Assuming the gas is ideal, we can solve this problem by using the following formula:
PV = nRTWhere:
P is Pressure, 2.50 atmV is Volumen is the number of moles, 3.20 molR is a constant, 0.082 atm·L·mol⁻¹·K⁻¹T is temperature, 265 KWe input the data:
2.50 atm * V = 3.20 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 265 KAnd solve for V:
V = 27.81 Lwhere does baby came from
Answer:
they came from for the dad sperm
The pollen grain produces a pollen tube that grows down the style, to the ovary, and into the .
Answer:
stem
Explanation:
Disadvantages of using cisplatin as an anti-cancer drug
Answer: The following side effects are common (occurring in greater than 30%) for patients taking Cisplatin:
Nausea and vomiting. Nausea may last up to 1 week after therapy.
Low blood counts.
Kidney toxicity.
Ototoxicity hearing loss, ringing in the ears.
Blood test abnormalities (low magnesium, low calcium, low potassium)
Explanation:
My mind is ok :')
How many milliliters of 0.010 M NaOH are required to exactly neutralize
20.0 milliliters of 0.020 M HCI?
30 mL
10 mL
40mL
20mL
Answer:20
Explanation:
List 3 natural resources (non-living) found in the “glorious place”
Answer:
уфукингнегроитукиурепоинты
Explanation:
help me with questions 6,11,15,16 and 17 please
ayúdame con las preguntas 6,11,15,16 y 17 por favor
Help solve the types of chemical reactions
[tex]1) \: decomposition[/tex]
[tex]2) \:hydrocarbon \: combustion[/tex]
[tex]3) \: formation[/tex]
[tex]4) \: double - replacement[/tex]
[tex]5 \: double - replacement[/tex]
[tex]6) \: formation[/tex]
[tex]7)double \: - replacement[/tex]
[tex]8) \: double - replacement[/tex]
What type of reaction is shown below?
C5H12() + 502(g) → 5CO2(g) + 6H2(g)
A. Combustion
B. Precipitation
C. Neutralization
D. Decomposition
Answer:
A. Combustion.
Explanation:
Hello there!
In this case, according to the given information about the shown chemical reaction, whereby liquid pentane reacts with oxygen to produce carbon dioxide and hydrogen (should be water); we can use the attached file to realize this is a A. Combustion reaction as it has CO2 and H2O on the products side from a hydrocarbon fuel.
Regards!
PLEASE HELP!! NO LINKS PLEASE REAL ANSWER!!!!!
What will be volume of 20.0 g of CH4 gas at a pressure of 0.950 atm and temperature of 21.0 oc?Question 1 options:
A. 21.8 L
B. 31.8 L
C. 2.27 L
D. 4.27 L
Which is true regarding pressure?
A.) at high pressure, the molecules are moving slower and therefore hitting other particles and the sides of a container less frequently
B.) pressure is calculated by combining the amount of space an entire object takes up.
C.) pressure is calculated by averaging the kinetic energy of all particles in a container
D.) at higher pressure indicates that particles are colliding with the walls of a container more frequently
Answer:
D
Explanation:
The higher a pressure in a system the faster the molecules within it move and collide with one another due to lack of space
If the experiment were repeated using a cuvettes with a path length of 2.0 cm, how would that affect the absorbance values for the Co2 solutions (if at all), assuming all of the concentrations remained unchanged?
Answer:
..............................
Jim makes a mixture which contains 10 mg of salt, 30 mg of sand, and some iron filings. The total mass of the mixture is 100 mg
Which amount of iron filings does Jim use in the mixture?
A10
B30
C40
D60
Answer:
Amount of iron fillings in mixture = 60 mg
Explanation:
Given:
Total mass of mixture = 100 mg
Amount of salt in mixture = 10 mg
Amount of sand in mixture = 30 mg
Find:
Amount of iron fillings in mixture
Computation:
Using Law of Conservation of mass;
Total mass of mixture = Amount of salt in mixture + Amount of sand in mixture + Amount of iron fillings in mixture
100 = 10 + 30 + Amount of iron fillings in mixture
100 = 40 + Amount of iron fillings in mixture
Amount of iron fillings in mixture = 100 - 40
Amount of iron fillings in mixture = 60 mg
hydrogen chloride, hydrogen nitrate (v), sodium chloride, sodium hydroxide. Name a substance known as common salt
Answer:
C: Sodium chloride
Explanation:
Common salt is gotten when sodium atoms reacts with chlorine atoms in an exothermic reaction to form an ionic substance known as sodium chloride with the chemical formula NaCl.
Equation is;
2Na + Cl2 = 2NaCl
Looking at the options, the correct one is Sodium chloride.
Which of the compounds shown are structural
isomers of this compound? Check all that apply.
A
B
С
D
Answer:
A & C
Explanation:
The next one is A Edge 2022
The compound which are the structural isomers of the given compound is compound A & C.
What are structural isomers?Structural isomers are those isomers in which which are having the same molecular formula but different structural structures.
Compound A: A is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound B: B is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Compound C: C is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound D: D is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Hence A & C are the structural isomers of given compound.
To know more about structural isomers, visit the below link:
https://brainly.com/question/26298707
PLEASE HELP REAL ANSWER NO FILE. Part A
Electricity generated from any source comes with its own advantages and
disadvantages. So, no source of energy for generating electricity is perfect. However,
imagine that there is an energy source that perfectly meets the needs of society.
Describe this ideal source of energy. Include relevant factors such as cost, supply, safety,
reliability, and environmental impact
Answer:
Wind energy
Explanation:
An ideal source of energy needs to be reliable, cost effective, safe and must lead to almost zero adverse environmental impact.
Wind energy is energy obtained from air moving at high velocity. This energy is harvested using windmills which convert mechanical energy to electrical energy.
Wind is inexpensive because it occurs naturally. However, a large expanse of land is required in order to mount sufficient number of windmills that will generate enough electrical energy for practical purposes.
This method of electricity generation is safe and does not lead to any environmental hazard unlike the burning of fossil fuels, use of nuclear energy or loss of habitat due to hydroelectric power generation.
When 50.0 liters of oxygen at 20.0 oC is compressed to 40.0 liters, what must the new temperature be to maintain constant pressure?
Answer:
234.52 K
Explanation:
Use V₁T₂ = V₂T₁
V₁ = 50 LV₂ = 40 LT₁ = 20°C = 293.15 K (20 + 273.15 = 293.15)(50 L)(T₂) = (40 L)(293.15 K)
T₂ = 234.52 K
What are the substances that interact to form new substances in a chemical reaction called?
A. Reactants
B. Products
C. Chemicals
D. Substances
Answer:
A. Reactants
Explanation:
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
help i will mark brainliest
Answer:
Image A
Explanation:
The hemisphere experiences summer when it is tilted towards the sun. Image a has the northern hemisphere tilted towards the sun.
Answer:
image A
Explanation:
this is because the sun is hitting earth at a steep angle
Solid AgCl (Ksp = 1.8 X 10-10) is placed in a beaker of water. After a period of time, the Ag+ concentration is measured and found to be 2.5 X 10-7 M.
a) What is the concentration of Cl-?
b) Has the system reached equilibrium?
c) Will more AgCl dissolve?
Explanation:
a)
[tex]k _{sp} = [Ag {}^{ + } ][Cl {}^{ - } ] \\ but \: [Ag {}^{ + } ] = [Cl {}^{ - } ] \\ k _{sp} = [Ag {}^{ + } ] {}^{2} \\ [Ag {}^{ + } ] = \sqrt{k _{sp}} \\ = \sqrt{1.8 \times {10}^{ - 10} } \\ = 1.34 \times {10}^{ - 5} mol {dm}^{ - 3} [/tex]
b)
It has not reached equilibrium because the silver concentration is not yet equal to the value of Ksp.
c)
Yes it will dissolve in order to establish the equilibrium.
What volume of 0.1700 M NaOH is required to titrate 24.00 mL of 0.1050 M HCI?
Answer:
Without rounding significant figures, V = 14.824 mL
With rounding significant figures, V = 10 mL
Explanation:
What locations are likely to be affected by an earthquake or tsunami?
San Francisco, California, USA
San Francisco, Tokyo, and Asunción
Tokyo, Japan
None of the locations
Asunción, Paraguay, South America
Answer:
All the locations can suffer earthquakes and a handful like tokyo tsunami so the question is either or so the anwer would be all
Explanation: