Answer:
*my opinion *1. using it for chemicals2. poisoning somebodyExplanation:
that's all-Which choice is a mixture?
carbon
oxygen
air
carbon dioxide
Answer:
the answer is : air
hope this will help you ❤️
Two Places were freshwater is found on earth
Answer:
Explanation:
Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps. Of all the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things!
What is the mass in grams of 4.21 x 1022 atoms of sulfur to the nearest tenth of a gram?
To calculate the mass of 4.21 x 10^22 atoms of sulfur, we need to use the atomic mass of sulfur and the Avogadro's number.
The atomic mass of sulfur = 32.06 g/mol,
One mole of sulfur atoms has a mass = 32.06 grams.
Avogadro's number (NA) = 6.022 x 10^23 atoms/mol.
One mole of any substance contains 6.022 x 10^23 particles.
To find the mass of 4.21 x 10^22 atoms of sulfur, we can follow these steps:
Number of moles of sulfur atoms in 4.21 x 10^22 atoms:
moles of sulfur = (4.21 x 10^22 atoms) / (6.022 x 10^23 atoms/mol)
= 0.070 moles
Mass of 0.070 moles of sulfur atoms:
mass of sulfur = (0.070 moles) x (32.06 g/mol)
= 2.24 g
Therefore, the mass of 4.21 x 10^22 atoms of sulfur is approximately 2.2 grams (rounded to the nearest tenth of a gram).
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Boron-10 is commonly used as a control rod for nuclear reactors because it absorbs _______ and releases an alpha particle and a lithium-7 nuclide.
A. a neutron
b. a gamma ray
c. an electron
d. a protron
Your answer is A. a neutron
A rod, plate, or tube containing a material such as hafnium, boron, etc., used to control the power of a nuclear reactor. By absorbing neutrons, a control rod prevents the neutrons from causing further fissions.
Answer:
A. a neutron
Explanation:
Boron-10 is commonly used as a neutron absorber due to the high neutron cross section of isotope 10B.
hope this helps!
how many moles of tin are there in 50 g of tin (II) oxide
Answer:
Moles of tin = 0.37 mol
Explanation:
Given data:
Mass of tin oxide = 50 g
Moles of tin = ?
Solution:
Number of moles of SnO:
Number of moles = mass/molar mass
Number of moles = 50 g/ 134.71 g/mol
Number of moles = 0.37 mol
We can see there is only one mole of Sn is present in one mole of tin oxide.
Thus in 0.37 mol of tin oxide,
0.37 mol × 1 = 0.37 mol of tin
The energy transformations are similar because they both involve transformations that
begin with chemical energy.
begin with electrical energy.
result in radiant energy.
result in mechanical energy.
Answer:
C) that result in radiant energy
Explanation:
got it right on edge 2022
Answer:
c
Explanation:
does calcium oxide reacts with carbon monoxide
Yes, calcium oxide (CaO) reacts with carbon monoxide (CO) to form calcium carbonate (CaCO3) and oxygen gas (O2). The reaction can be represented by the following equation:
CaO + CO -> CaCO3 + O2
This reaction is an example of a chemical change, as it results in the formation of a new substance with different chemical properties. The reaction is also exothermic, meaning that it releases heat.
Calcium oxide is a white solid that is used in a variety of applications, including cement production and the purification of flue gases. Carbon monoxide is a colorless, odorless gas that is toxic to humans when inhaled. It is produced as a byproduct of the incomplete combustion of fossil fuels.
Hope This Helps You!
on a hot summer day, you make a glass of refreshing sweet iced tea by combining boiling water, tea, sugar, and ice. what type of change occurs and how do you know?
A physical change will occur when boiling water, tea, sugar, and ice are combined to form sweet iced tea.
What is a physical change?A physical change is a change affecting the form of a chemical substance, but not its chemical composition.
The characteristics of some physical changes are as follows:
textureshapetemperaturechange in the state of matterAccording to this question, one makes a glass of refreshing sweet iced tea by combining boiling water, tea, sugar, and ice on a hot summer day. The resulting solution is an example of a mixture, which contains constituents that retain their individual identity.
This suggests that the change is a physical change because there is no formation of a new substance.
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why must you equalize the pressure inside and outside
Answer:
You must equalize the pressure inside and outside the flask to determine the total because it keeps the water level the same.
(credits to "coursehero")
Explanation:
Answer: now i don't know
Explanation:
If 8.2 g of sodium ethanoate produced 560 cm3 of methane (at s.t.p.). which one of the following is the percentage yield of the reaction;
A 2.5
B 4.0
C 12.0
D 25.0
The percentage yield of the reaction : 25%
Further explanationC₂H₃NaO₂(CH₃COONa)- Sodium ethanoate(MW=82,0343 g/mol)
Reaction
CH₃COONa + NaOH⇒CH₄+Na₂CO₃
mol CH₃COONa :
\(\tt \dfrac{8.2}{82.0343}=0.1\)
mol CH₄=mol CH₃COONa = 0.1
mass CH₄ (MW=16.04 g/mol) :
\(\tt 0.1\times 16.04=1.604~g\)⇒ theoretical
mol of 560 cm³(0.56 L) of methane (⇒1 mol = 22.4 L at STP) :
\(\tt \dfrac{0.56}{22.4}=0.025~mol\)
mass CH₄ :
\(\tt 0.025\times 16.04=0.401~g\)
\(\tt \%yield=\dfrac{0.401}{1.604}\times 100\%=25\%\)
A typical volume leaving the large intestine might be 140 mL. If the volume exiting the large intestine were 364 mL, then it would most likely indicate a case of
If the volume exiting the large intestine were 364 mL, then it would most likely indicate a case of diarrhea. This condition may lead to dehydration.
Diarrhea: causes and diagnosisDiarrhea is an unhealthy condition that occurs when the body excretes an excessive amount of water.
Diarrhea must be treated because this condition can lead to dehydration (it may even lead to death in severe cases).
Both diarrhea and vomiting may lead to the loss of body fluids.
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An element cannot ________. a be part of a homogeneous mixture b be a pure substance c interact with other elements to form compounds d be part of a heterogeneous mixture e be separated into other substances by chemical means
Answer:
b be a pure substance
Explanation:
Which is a chemical property of sulphur?
A. It is a solid.
B. It is combustible.
O c. It is odorless.
D. It is yellow.
O E. It has density.
A, O and D
and its sulfur luv ♡ not sulphur
According to their energies, atomic orbitals are filled as:
a s>p>d> f
b s>d>p> f
C s
The order in which the orbitals are filled is s>p>d> f.
What are the atomic orbitals?
Atomic orbitals are mathematical functions that describe the probability distribution of an electron in an atom. They are used to predict the location of electrons in an atom and how they will interact with other atoms. There are four types of atomic orbitals: s, p, d, and f orbitals. Each type corresponds to a specific energy level and shape, and can hold a certain number of electrons.
We know that the energy of the orbitals would increase in the order of s>p>d> f and this is the order in which they are filled.
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Which of these chemical equations demonstrates the law of conservation of mass?
F. C3H8 + 4 O2 → 3 CO2 + 4 H2O
G. 2 H2 + O2 à 2 H2O
H. H + O à H2O
J. Mn(OH)2 + H3PO4 à 2Mn3(PO4)2 + 2H2O
Answer:h
Explanation:
Hypothesis: In this section, please include the if/then statements you developed during your lab activity.These statements reflect your predicted outcomes for the experiment. You must use 1 metal and 2 non-metals for each combination. Note: There are only 14 possible combinations for this practice activity. If I use __________, _________________, and ________________, then I can make ___ new compounds in five minutes.
If you use Copper (Cu) as the metal , Oxygen (O) and Carbon (C) as the c, then you can make 2 new compounds in five minutes.
The two possible compounds are:
Copper oxide (CuO)Copper carbide (Cu2C)What is Copper oxide (CuO)?Copper oxide (CuO) is a chemical compound composed of copper and oxygen. It is a black, solid material with a high melting point and is commonly referred to as cupric oxide or black oxide of copper.
CuO can be produced by heating copper in the presence of oxygen, or by reacting copper sulfate with sodium hydroxide. It is commonly used as a raw material in the production of copper salts, in the manufacturing of ceramics, as a pigment, and as a catalyst in various chemical reactions.
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describe the main diffrence between the bohr model of the atom and the rutherford model
Answer:
Bohr thought that electrons orbited the nucleus in quantised orbits. ... In Rutherford's model most of the atom's mass is concentrated into the centre (what we now call the nucleus) and electrons surround the positive mass in something like a cloud. Bohr's most significant contribution was the quantisation of the model.
Explanation:
Explain how copper is produced from copper() sulfate solution by electrolysis?
Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.
A substance is followed by the symbol (I) in a chemical equation what does the symbol represent
Answer:
It's a liquid
Explanation:
The (l) is one of the four state symbols. You also have (s) for solid, (g) for gas and (aq) for aqueous - something in a solution. Hope this helps!!
Answer:
liquid
Explanation:
the scientific symbol of liquid is represented by l
SEnD NuuuDdddeeeeSss I you acccalty do you will get crown
A sample containing 0.75 moles of CO2 would contain how many molecules?
33g
explanation
n=mM
Where:
- n is the amount or number of moles
- m is the mass in grams
- M is the molar mass in grams/mole
n=0.75
Calculate molar mass by adding the atomic masses of all atoms in the molecule
M=12+16⋅2
=44
m=n⋅M
=0.75⋅44
=33g
Answer:
4.5 ×10^22)
Explanation:
no. of particles =no. of mole×avogadro's number of particles no. of particles =0.75×6.02×10^23 no. of particles =4.5 ×10^22
Give two examples of solutions that you might find or prepare in a kitchen.
Explanation:
solid liquid
solid gas
liquid solid
calculate the volume of 0.310-m naoh solution needed to completely neutralize 33.3 ml of a 0.270-m solution of the diprotic
The volume of NaOH = mole/molarity = 0.038718/ 0.310 = 0.124 lit = 124 ml.
What is mole?
The unit of measurement known as the mole (symbol: mol) refers to the quantity of matter in a system that includes the same number of atoms as there are in 0.012 kilograms of carbon 12.
What is molarity?
The amount of solute in a liter of solution is measured in moles, or moles per liter.
The balanced equation of neutralization reaction is:
H2SO4 + 2NaOH ? Na2SO4 + 2H2O ---- (equation 1)
2 moles NaOH combine with one mole of sulfuric acid H2SO4
Now,
Molarity of NaOH = 0.310-m
Molarity of H2SO4 = 0.270-m
Therefore, Number of moles of H2SO4 = molarity * Volume = 0.270* 71.7*10-3 = 0.019359 moles
from equation (1) number of moles of NaOH required to neutralize H2SO4 = 0.019359 *2= 0.038718 moles
Molarity = mole/ (volume in liter)
Therefore, Volume of NaOH = mole/molarity = 0.038718/ 0.310 = 0.124 lit = 124 ml.
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magnetic resonance spectroscopic measurement of cerebral gamma-aminobutyric acid concentrations in patients with bipolar disorders
Magnetic Resonance Spectroscopy (MRS): MRS is a non-invasive imaging technique that allows for the measurement of chemical concentrations in the brain. It uses magnetic fields and radio waves to detect the signals emitted by different chemicals in the brain.
Gamma-Aminobutyric Acid (GABA): GABA is an important neurotransmitter in the brain that helps regulate neuronal activity. It is involved in the inhibition of neuronal signals, which is crucial for maintaining a balance in brain function.
Bipolar Disorder: Bipolar disorder is a mental illness characterized by extreme shifts in mood, energy, and activity levels.
It is believed to be caused by a combination of genetic, environmental, and neurochemical factors.
Measurement of GABA Concentrations: The MRS technique allows researchers and clinicians to measure the concentration of GABA in the brain. By comparing the GABA levels in patients with bipolar disorder to those without the disorder, scientists
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What unit of mass measurement would I use to measure a vitamin pill?
Answer: Milligrams
Explanation:
Vitamins are measured in Milligrams because if used grams, there would be a higher dose.
Question: Based on this information, which type of light is more likely to damage the material?
1)The gamma ray light is more likely to damage the material because the gamma ray light can
pull energy out of the material when it passes through the material.
b
2)The X-ray light is more likely to damage the material because the X-ray light bounces off of
the material, which means that it has more energy.
3)There is no way to know because they are two different types of light, and different types of
light can change a material in different ways.
4)Neither type of light is likely to damage the material because the material does not take in
energy from either the X-ray light or the gamma ray light.
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lol
Answer: It will be D which is number 4........
Neither type of light is likely to damage the material, because the material does not take in energy from either the X-ray light or the gamma ray light.
Explanation:
Why dont crystals have cells.
Answer:
Crystals are composed of repeating units, which are composed of atoms or molecules, but the smallest repeating unit which has the full symmetry of the whole crystal is called a unit cell.
Explanation:
give latin name of silver
carbon tetrachloride displays a triple point at 249.0 k and a melting point (at 1 atm) of 250.3 k. which state of carbon tetrachloride is more dense, the solid or the liquid? explain.
Chlorine is really the main liquid used in extinguishers, which is why it works so well to put out tiny flames. It doesn't ignite at any temperature and is not flammable.
The usage of carbon tetrachloride extinguishers has been discontinued.Dichromate extinguishers were abandoned in the 1950s because to the chemical's toxicity, which causes the nerves and major organs to be destroyed when exposed to large doses. A fire's heat can also transform CTC into hydrogen cyanide gas, a chemical agent that was occasionally used.
What is the proper way to get rid of carbon tetrachloride?Get in connect with a licensed, professional rubbish disposal company to have this material removed. After combining it in or combining it with an explosive solution, burn the chemical in a thermal crematorium with an intake and scrubber;
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janzen, h. h. and bettany, j. r. 1984. sulfur nutrition of rapeseed: i. influence of fertilizer nitrogen and sulfur rates. soil sci. soc. am. j. 48: 100–107
The study conducted by Janzen and Bettany in 1984 investigated the influence of nitrogen and sulfur fertilizer rates on the sulfur nutrition of rapeseed plants.
The researchers examined the relationship between the application rates of nitrogen and sulfur fertilizers and their effects on the growth and sulfur uptake of rapeseed plants.
In their study, Janzen and Bettany focused on understanding the impact of nitrogen and sulfur fertilizers on rapeseed plants' sulfur nutrition. They conducted experiments where different rates of nitrogen and sulfur fertilizers were applied to the soil, and the growth and sulfur uptake of rapeseed plants were measured. The researchers aimed to determine the optimal fertilizer rates that would promote adequate sulfur nutrition in the plants, leading to better growth and development.
The study's findings provided insights into the relationship between nitrogen and sulfur fertilizers and their influence on rapeseed plants' sulfur nutrition. This information can be valuable for agricultural practices, helping farmers optimize fertilizer application to enhance crop yield and quality. Additionally, the study contributes to the broader understanding of plant nutrient interactions and the importance of sulfur nutrition in the growth of rapeseed plants.
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