How are atoms and elements related??
Someone help me plz
Sensations of touch are picked up by nerves in the skin's _____.
- dermis
- epidermis
- fatty layer
- renal layer
how does the sun cause wind
Which of the alkali metals are liquids at 50°C?
If you are mixing a solution in a spray bottle with 15 ounces of water, how much chlorine do you need to add for the correct ratio?
Sulfur has fewer valence electrons than chlorine. True or False
Answer:
True
Explanation:
Valence electron:
No. of electrons present in the outermost shell of any atom is called valence electrons. Valence electrons determines the chemical properties of element.
Atomic no. of S = 16
Electronic configuration of S = [tex]1s^22s^22p^63s^23p^4[/tex]
Energy shell (n = 3) is the outermost shell
Valence electrons = 6
Atomic no. of Cl = 17
Electronic configuration of S = [tex]1s^22s^22p^63s^23p^5[/tex]
Energy shell (n = 3) is the outermost shell
Valence electrons = 7
So, sulfur has 6 valence electrons and Cl has 7 valence electrons.
The statement 'Sulfur has fewer valence electrons than chlorine.' is true.
What is the cathode
Answer:
The cathode is a negatively charged electrode by which electrons enter an electric device.
What is the solid, rocky outer layer of the mantle?
When trees die,they often fall on the ground and decompose.Which part of the earth system includes dead and decomposed trees?
In the United States, electrical power plants are the main source of energy for homes and factories. Energy resources provide the electricity you use. Most power plants produce electricity by burning fossil fuels. Which of the following is an example of a fossil fuel?
Answer:
Fossil fuels:
-Coal
-Oil
-Natural gas
ect
Explanation:
what is sinking cold air and rising warm air?
HELP ME NOW ASAP
Now, find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide for a solution at a pH = 11. Then divide the H+ concentration by the OH– concentration. Record these concentrations and ratio in Table C.
What is the concentration of H+ ions at a pH = 11?
mol/L
What is the concentration of OH– ions at a pH = 11?
mol/L
What is the ratio of H+ ions to OH– ions at a pH = 11?
:1, OR 1:
Answer:0.00000000001
0.001
0.00000001
100,000,000
Explanation:i am big brain
Answer:
0.00000000001
0.001
0.00000001:100,000,000
Explanation:
i just did it on edge
what is the percent yield of NaCl if 31.0 g of CuCl reacts with excess NaNo3 to produce 21.2 g of NaCl
Final answer:
To calculate the percent yield of NaCl, one would use the formula of (Actual Yield / Theoretical Yield) × 100%. The percent yield of NaCl is approximately 57.96%.
Explanation:
To find the percent yield of NaCl, we first need to determine the theoretical yield of NaCl, which is the maximum amount that could be produced according to the balanced chemical equation.
The balanced chemical equation for the reaction between CuCl and NaNO3 to produce NaCl is:
[tex]\[ CuCl + 2NaNO_3 \rightarrow 2NaCl + Cu(NO_3)_2 \][/tex]
From the equation, we can see that 1 mole of CuCl produces 2 moles of NaCl.
1. Calculate the number of moles of CuCl used:
[tex]\[ \text{Molar mass of CuCl} = 63.5 + 35.5 = 99 \, \text{g/mol} \][/tex]
[tex]\[ \text{Number of moles of CuCl} = \frac{31.0 \, \text{g}}{99 \, \text{g/mol}} = 0.313 \, \text{mol} \][/tex]
2. Since 1 mole of CuCl produces 2 moles of NaCl, calculate the number of moles of NaCl produced:
[tex]\[ \text{Number of moles of NaCl} = 2 \times 0.313 \, \text{mol} = 0.626 \, \text{mol} \][/tex]
3. Calculate the theoretical yield of NaCl in grams:
[tex]\[ \text{Theoretical yield of NaCl} = \text{Number of moles} \times \text{Molar mass of NaCl} \][/tex]
[tex]\[ \text{Molar mass of NaCl} = 23 + 35.5 = 58.5 \, \text{g/mol} \][/tex]
[tex]\[ \text{Theoretical yield of NaCl} = 0.626 \, \text{mol} \times 58.5 \, \text{g/mol} = 36.591 \, \text{g} \][/tex]
Now that we have the theoretical yield and the actual yield (21.2 g), we can calculate the percent yield using the formula:
[tex]\[ \text{Percent yield} = \frac{\text{Actual yield}}{\text{Theoretical yield}} \times 100\% \][/tex]
[tex]\[ \text{Percent yield} = \frac{21.2 \, \text{g}}{36.591 \, \text{g}} \times 100\% \][/tex]
[tex]\[ \text{Percent yield} \approx 57.96\% \][/tex]
Therefore, the percent yield of NaCl is approximately 57.96%.
PLEASE HELP ASAP
Complete this sentence. The electrical conductivity of a sample will ____________ when the size of the sample increases.
decrease
stay the same
increase
be unable to be determined
Answer:
It will stay the same
Explanation:
I took the test and got a 100%
which structures function mainly in transport
C and D structures function mainly in transport. Hence, option D is correct.
What structures function in active transport?The membrane structures that function in active transport eg. integral proteins.
A major role of the plasma membrane is transporting substances into and out of the cell.
The plasma membrane is selectively permeable, allowing only certain substances to pass through.
Proteins embedded within the plasma membrane helps to move hydrophilic, polar molecules into the cell.
Hence, option D is correct.
Learn more about the structure's function in active transport here:
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At sea level, water boils at 100 degrees c, while methane boils at -161 degrees c. Which of these substances has a stronger force of attraction between its particles?
Describe the cycle that involves soil, decomposers, and other living things
Final answer:
Biogeochemical cycles involve the recycling of nutrients like carbon and nitrogen through soil, decomposers, and other living things. Decomposers break down dead organisms, releasing nutrients back into the soil for use by plants and entering the food chain. These cycles sustain the stability and balance of ecosystems.
Explanation:
The cycle involving soil, decomposers, and other living things is known as a biogeochemical cycle. Decomposers, such as bacteria and fungi, play a critical role in these cycles by breaking down dead organisms and animal wastes. This process recycles nutrients like carbon and nitrogen back into the soil, where they can be taken up by plants. These nutrients then enter the food chain, supporting plant and animal growth.
Decomposers, including bacteria and fungi, use organic material as a source of energy and nutrients, contributing to the stability of ecosystems. Without decomposers, dead material would accumulate, and essential nutrients would be locked within them, unavailable to producers. Therefore, decomposers are crucial in maintaining the balance of nutrients in the ecosystem.
Biogeochemical cycles like the carbon cycle, nitrogen cycle, and water cycle are essential for life on Earth. They all represent the continuous exchange of water and nutrients between the biotic and abiotic components of the planet, demonstrating the connected nature of all living and non-living elements within an ecosystem.
What type of equation is this 4C5H9O+2702➡️20CO2+18H2O
Judging by the electron domain geometry, which type of hybrid orbitals does this molecule have? s sp sp2 sp3
Is gold a rock :)...........
An atom of which element in the ground state contains electrons in the fourth principal energy level?
How was urea originally produced in the lab according to the text?
Concentrated sulfuric acid was accidentally added to sucrose.
Friedrich Wohler was working with ammonium cyanate & found crystals of urea in his breakers.
Cobalt chloride was added to water, which produced crystals.
Answer is: Friedrich Wohler was working with ammonium cyanate & found crystals of urea in his breakers.
Urea is an organic compound with chemical formula CO(NH₂)₂
Friedrich Wohler's discovered in 1828 that urea can be produced from inorganic starting materials.
In human body, the source of these two nitrogen atoms are ammonia (NH₃) from nitrogen compounds (mostly metabolism of amino acids) through which excess nitrogen is eliminated from organisms.
This process is called urea cycle, which extracted nitrogenous wastes. The liver forms it by combining two ammonia molecules with a carbon dioxide molecule.
ANSWER ASAP WILL BE GIVING MEDAL HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! On cold winter nights a mother places a portable heater in her toddler's bedroom. the heater does not have a fan to blow hot air, it only has simple metal coils that get very hot. A) Convection B) Conduction C) Radiation D) Induction
On cold winter nights, a mother places a portable heater in her toddler's bedroom. The heater does not have a fan to blow hot air, it only has simple metal coils that get very hot. Therefore, option C is correct.
What is metal coil ?Metal coil is created by winding or coiling a finished steel product, such as a sheet or strip, after it has been rolled. The width of the steel coil is substantially greater than the thickness. Steel coils can be categorized as Hot Rolled, Cold Rolled, or Galvanized, depending on the production process.
Depending on the industry, different uses for steel coil can be found, but some of the more common and well-known ones are pipe manufacture, structural steel components, electronic components, consumer goods, automobile parts, and many more.
In the ignition system of a vehicle, the metal coil is an induction coil that converts the battery's voltage to the thousands of volts required to produce an electric spark in the spark plugs that ignites the fuel.
Thus, option C is correct.
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In which of the following are the symbol and name for the ion given correctly
Answer:
This question is incomplete but the completed question is below
In which of the following are the symbol and name for the ion given correctly?
a. Fe2+: ferrous ion; Fe3+: ferric ion
b. Sn2+: stannic ion; Sn4+: stannous ion
c. Co2+: cobalt(II) ion; Co3+: cobaltous ion
d. Pb2+: lead ion; Pb4+: lead(IV) ion
The correct option is a
Explanation:
In this question, the knowledge of ion naming is been tested. Below, the ions and there correct names will be presented
Pb2+ is lead (II) ion
Pb4+ is lead (IV) ion
Co2+ is cobalt (II) ion and it is also called cobaltous ion
Co3+ is cobalt (III) ion
Sn2+ is tin (II) ion and it is also called stannous ion
Sn4+ is tin (IV) ion and it is also called stannic ion
Fe2+ is iron (II) ion and it is also called ferrous ion
Fe3+ is iron (III) ion and it is also called ferric ion
From the above, we can deduce that option a is the one that has it's symbol correctly attached to it's name
How does radiant energy work?
The following characteristics describe which of these terms? The substance is mixed uniformly throughout and each part of the substance contains the same ratio of materials with the same properties.
A.homogeneous mixture
B. compound
C. heterogeneous mixture
D. pure substance
Answer: The correct answer is (A).
Explanation:
Homogeneous Mixtures are the mixture in which:
Substance is uniformly distributed throughout the medium.Each part of the mixture contains same ratio of the substance.Properties of the substance remains unchanged.For example: Sugar in water, alloys of metals etc.what have chemists done to help people conserve energy?
Answer:
developed insulation
Explanation:
HELP PLEASE, I GIVE 50 POINTS!!!!!!
How is the electronegativity difference used in determining the type of bond that occurs between two atoms? (SELECT ALL THAT APPLY)
a) If the difference is between 0.4 and 1.7, it is polar covalent.
b) If the difference is greater than 1.7, it is mostly ionic.
c) If the difference is zero, the bond is considered nonpolar covalent.
d) If the difference is less than 0.4, it is mostly covalent.
e) If the difference is zero, the bond is considered mostly polar.
f) If the difference is greater than 1.7, it is polar covalent.
g) If the difference is between 0.4 and 1.7, it is nonpolar covalent.
h) If the difference is less than 0.4, it is mostly ionic.
What can affect the properties of a substance?
only the types of atoms
only the arrangement of atoms
the arrangement and types of atoms
neither the arrangement nor the types of atoms
Use the term chloroplast and organelle in a sentence