The plastic, wood, copper, and glass are the variables. The variables in an experiment are the things we can change and then test.
Use the term chloroplast and organelle in a sentence
How does radiant energy work?
How are atoms and elements related??
Someone help me plz
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 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%.
Which of the alkali metals are liquids at 50°C?
What type of equation is this 4C5H9O+2702➡️20CO2+18H2O
What is the cathode
Answer:
The cathode is a negatively charged electrode by which electrons enter an electric device.
An atom of which element in the ground state contains electrons in the fourth principal energy level?
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.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%
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 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
What are some uses of olivine?
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?
water (h20) is composed of the same element as hydrogen peroxide (h202) how do their properties compare?
They have different properties because the arrangement of atoms is different.
They have the same properties because they have the same atoms.
they have different properties because they have different atoms.
they have the same properties because they have the same arrangement of atoms.
The formation of compound takes place by the combination of two or more different atoms. The combination of atoms takes place in a definite proportions. Compounds with different proportions of atoms have different properties.
Water ([tex]H_2O[/tex]) is composed of the same element as hydrogen peroxide ([tex]H_2O_2[/tex]) that is hydrogen ([tex]H[/tex]) and oxygen ([tex]O[/tex]). The combination of hydrogen and oxygen atoms in water is in [tex]1:2[/tex] ratio whereas the combination of hydrogen and oxygen atoms in hydrogen peroxide is in [tex]2:2[/tex] ratio. So, the properties of water and hydrogen peroxide are different as the arrangement of atoms is different in the compound.
Hence, the correct option is they have different properties because the arrangement of atoms is different.
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
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
Sensations of touch are picked up by nerves in the skin's _____.
- dermis
- epidermis
- fatty layer
- renal layer
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.
When trees die,they often fall on the ground and decompose.Which part of the earth system includes dead and decomposed trees?
what formula is used to calculate the volume of a solid object
The formula for calculating the volume of a solid object depends on the shape. We have specific formulas for shapes like cube, cylinder, and rectangular prism. Moreover, the volume can be computed indirectly by dividing the mass by its density.
Explanation:The formula for calculating the volume of a solid object varies depending on the shape of the object. For instance, the volume of a cube is calculated by cubing the edge length (V = s³), whereas the volume of a cylinder is found by multiplying the area of the base by the height (V = πr²h). Similarly, the volume of a rectangular prism can be calculated using the formula V = lwh (length x width x height).
Apart from these, there are formulas for other regular shapes like a sphere, cone, etc. Always ensure conversion to suitable units before calculation.
Nonetheless, in most scenarios, the volume of a substance can be deduced by dividing the mass by its density (V = mass/density).
Learn more about Volume Calculation here:https://brainly.com/question/33318354
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18)
The process of deposition causes
A) rock and soil to slowly be lost.
B) rock and soil to quickly be lost.
C) rock and soil to slowly be gained.
D) rock and soil to quickly be gained.
19)
Roberto's family went to the coast of Georgia. While they were there, Roberto noticed that the rocks close to the water were smooth, and the rocks farther away from the water had more jagged edges. What MOST LIKELY caused the rocks to be smooth instead of rough?
A) birds pecking at the rocks
B) fish swimming over the rocks
C) the sun shining on the rocks
D) waves crashing down on the rocks
20)
Deposition is a process that involves wind carrying sediment and then depositing it in a particular place. One common beach sight formed by deposition is a
A) reef.
B) sand dune.
C) sand castle.
D) barrier island.
21)
batteries properties
Battery Brand average life cost
A 12 hours $0.50
B 18 hours $2.00
C 24 hours $3.50
If a battery is needed for a smoke detector where the biggest priority is for the device to last as long as possible, then which brand is the best choice?
A) Battery A
B) Battery B
C) Battery C
D) All 3 brands are equally good choices.
Eliminate
23)
About 21% of Earth's atmosphere is composed of oxygen. Oxygen can combine with other substances. The chemical reaction of oxygen with other substances is called oxidation and it is a source of chemical weathering. The building on the left has undergone oxidation. Compare the picture on the left with the picture on the right. The building has changed. The rock has changed much like the building.
Describe how the rock on the right has changed over time.
A) Chemical weathering has happened due to acid rain in the area.
B) Oxygen has chemically reacted with minerals in the rock; oxidation has occurred.
C) Water in the atmosphere has caused the rock to rust; it has physically weathered.
D) Physical weathering has taken place and the rock is broken down into smaller pieces.
Eliminate
Answer:
The corrects answers are 18-C / 19-D / 20-B / 21-C
Explanation:
18) The process of deposition causes rock and soil to slowly be gained. Deposition is the geological process in which soil and rocks are added to a landform.
19) Waves crashing down on the rocks cause the rocks close to the water were smooth. This is caused by the continuous wear of the sea waves on the surface of the rock.
20) One common beach sight formed by sand dune. Waves deposit sediments in offshore areas, where they accumulate like sand dunes. This accumulation occurs when waves collide in shallow water.
21)If the priority is for the batteries to last longer, the one with the longest battery life should be chosen. In this case, it is 24 hours.
23) I don't have the picture, so I cant tell you the correct answer.
Have a nice day!
Is gold a rock :)...........
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?
Judging by the electron domain geometry, which type of hybrid orbitals does this molecule have? s sp sp2 sp3
What is the solid, rocky outer layer of the mantle?
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 have chemists done to help people conserve energy?
Answer:
developed insulation
Explanation:
PLZ HELP!!!!!
(Creature and depth above or below sea level)
⦁ Hermit crab (2 ft)
⦁ Clam (0 ft)
⦁ Snapper (-10 ft)
⦁ Redfish (-3 ft)
List these from deepest to highest.