Answer:
it destroy the surrounding area
2 H2 + O2 = 2H2O You have 20 grams of H, what's the mass of water?
Answer:
2H2 + O2 —-> 2H2O
The mole ratio of H2 to H2O is 2 : 2 = 1:1
4 moles of H2 = 4 moles of H2O
Moles of H20 = 4mol
Molar mass of H2O = 18g/mol
Mass = moles X Molar mass
= 4mol x 18g/mol
= 72g
Mass of H2O is 72g
Which of the following is not a suggested strategy for treating or preventing a communicable disease?
Get vaccinated to prevent infection from a virus.
Receive a vaccine while you are ill from a virus.
Get tested for a suspected infectious disease.
Use hand sanitizer if soap isn't available.
The strategy that is not a suggested way of treating or preventing a communicable disease is to receive a vaccine while you are ill from a virus.
Treatment and prevention of communicable diseaseA communicable disease is a type of disease that can spread from one person to another in the following ways:
contact with blood and bodily fluids;breathing in an airborne virus, orbeing bitten by an insect.There are various ways to prevent the spread of communicable diseases which include:
Immunization against infectious diseases, washing of hands regularly or the use of hand sanitisers if soap is not available.Get tested for a suspected infectious diseaseTo receive a vaccine while ill from a virus is not advisable because there may be chances of spreading your illness to health care workers who are administering the vaccine.
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giving brainliest please help!
Answer:
pretty sure it is
2
1
2
3
1
2
Explanation:
the thermal energy of the higher-temperature object as does the temperature?
Answer:
Temperature is the average kinetic energy of particles of an object. Warmer objects have faster particles and higher temperatures. If two objects have the same mass, the object with the higher temperature has greater thermal energy. Temperature is measured with a thermometer.
" The use of insecticide is not an interest but an obligation". justify the statement
Answer:
Insecticides are not good for health. Their use is harmful to other animals, birds and humans. But, without their use, it is not possible to grow the required amount of food. So, "the use of insecticide is not an interest, but an obligation".
How many moles of water (H20) are produced when 2 moles of KMnO, react with plenty of HCI? Show work if can will give most points :) !!
I hope this helps, you can ask any questions for clarification
Helium is most likely to behave as an ideal gas when its under what?
Answer:
Low pressure and high temperature :)
Have an amazing day!!
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Which compound below will readily react with a solution of bromine consisting of 48% hydrobromic acid and 30% hydrogen peroxide?
Answer:
cyclohexene I think that's the answer
Which type of fuel can only be used in certain geographic areas?
O A. Nuclear
O B. Biomass
O C. Coal
O D. Wind
Answer:
A) Nuculear
Explanation:
Nuclear powerplants are danguorous for the ecosystem and incase of an exsplosion nuclear is the hardest to recover from. Especially if you know the story about Chernobyl blow up. many animals began to grow diffrent mutations and evryone had to evacuate from having desieses and mutations.
Hoped this helped...
how many moles of H2 would be required to produce 37.0 moles of water?
Hii there !
The reaction accompanying production of water in this case would be -
[tex]\green{ \underline { \boxed{ \sf{H_2+ \frac{1}{2}O_2\longrightarrow H_2O}}}}[/tex]
Thus ,by observing the reaction, we can conclude that 1 mole of Hydrogen (H[tex]_2[/tex])react with 1/2 mole of oxygen(O[tex]_2[/tex])to produce 1 mole of water (H[tex]_2[/tex]O)
[tex]\implies[/tex]Therefore, 37.0 moles of hydrogen(H[tex]_2[/tex]) will be required to produce 37.0 moles of water.
Hope it helps.
What is the molarity of a solution that has 26 moles of nacl in 2. 7 l of water?.
The molarity of a solution that has 26 moles of NaCl in 2.7L of water is 9.63M.
How to calculate molarity?The molarity of a solution can be calculated by dividing the number of moles of the solute by the volume of the solution as follows:
Molarity = no of moles ÷ volume
According to this question, a solution has 26 moles of NaCl in 2. 7 l of water. The molarity is as follows:
Molarity = 26mol ÷ 2.7L
Molarity = 9.6M.
Therefore, the molarity of a solution that has 26 moles of NaCl in 2.7L of water is 9.63M.
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Water’s molar mass is 18.01 g/mol. the molar mass of glycerol is 92.09 g/mol. at 25°c, glycerol is more viscous than water. which substance has the stronger intermolecular attraction? glycerol because it has a larger molar mass glycerol because it is more viscous and has a larger molar mass water because it has a lower molar mass water because it is less viscous and has a lower molar mass
Glycerol has the stronger intermolecular attraction because it is more viscous and has a larger molar mass.
What is Viscosity?This is the ability of substances to resist flow and is common among fluids such as air and liquid.
Glycerol however has a stronger intermolecular attraction because it is more viscous and has a larger molar mass because they have a direct relationship.
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Answer:
A-glycerol because it has a larger molar mass
Explanation:
Edge 2022 :)
Which phrase describes a dipole moment? (1 point)
the separation of positive and negative charges
the vibration of a molecule
the imbalance of positive and negative charges
the releasing of energy from a molecule
Which statement best summarizes the presence of greenhouse gases in the atmosphere? (1 point)
The atmosphere is mostly non-greenhouse gases, so the small amount of greenhouse gases have little impact on climate
The atmosphere has recently changed and is mostly greenhouse gases, but they have little impact on climate
The atmosphere is mostly non-greenhouse gases, but the small amount of greenhouse gases have a large impact on climate
The atmosphere has recently changed and is mostly greenhouse gases, which have a large impact on climate
Which observed consequence is due to increased production of greenhouse gases? (1 point)
more glaciers
global cooling
melted ice caps
fewer floods
Are greenhouse gases and the greenhouse effect ever beneficial? Why or why not? (1 point)
No, greenhouse gases are a result of air pollution, which is detrimental to the environment.
Yes, industries need to consume greenhouse gases to help people keep their standard of living
No, too many greenhouse gases cause the planet to retain too much heat.
Yes, the greenhouse effect keeps the planet warm enough to support life.
Which molecule acts as a greenhouse gas? (1 point)
nitric oxide (NO)
oxygen (0₂)
nitrous oxide (N₂O)
nitrogen (N₂)
Answer:
1. the imbalance of positive and negative charges.
Explanation
The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system, that is, a measure of the system's overall polarity.
2.The atmosphere has recently changed and is mostly greenhouse gases, which have a large impact on climate
Explanation.
They cause climate change by trapping heat, and they also contribute to respiratory disease from smog and air pollution. Extreme weather, food supply disruptions, and increased wildfires are other effects of climate change caused by greenhouse gases.
3.melted ice caps
explanation
A stronger greenhouse effect will warm the ocean and partially melt glaciers and ice sheets, increasing sea level. Ocean water also will expand if it warms overexcessively.
4.Yes, the greenhouse effect keeps the planet warm enough to support life.
Explanation
The greenhouse effect is a good thing. It warms the planet to its comfortable average of 59 degrees Fahrenheit (15 degrees Celsius) and keeps life on earth, well, livable. Without it the world would be a frozen, uninhabitable place, more like Mars.
5.nitrous oxide.
Explanation
There are several different types of greenhouse gases. The major ones are carbon dioxide, water vapor, methane, and nitrous oxide. These gas molecules all are made of three or more atoms. The atoms are held together loosely enough that they vibrate when they absorb heat.
The phrase which describes a dipole moment is the separation of positive and negative charges,the statement best summarizes the presence of greenhouse gases in the atmosphere , the atmosphere is mostly non-greenhouse gases, but the small amount of greenhouse gases in an ecosystem have a large impact on climate.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .The more glaciers is the consequence is due to increased production of greenhouse gases.The greenhouse effect keeps the planet warm enough to support life. Nitrous oxide molecule acts as a greenhouse gas.
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An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom? It accepted radiation in a chemical reaction. It donated neutrons to another atom in a chemical reaction. It emitted an alpha particle in a nuclear reaction. It released a beta particle in a nuclear reaction.
Answer:
C
Explanation:
It denotes a loss of 2 protons and 2 neutrons for the atom. As a result, the atom released an alpha particle, which is composed of two protons and two neutrons, hence option C is correct.
What is an alpha particle?The structure of alpha particles, also known as alpha rays or alpha radiation, is similar to that of the helium-4 nucleus and is made up of two protons and two neutrons bonded together.
They often result from the alpha decay process, although they can also result from other processes.
If an atom has 84 protons and 86 neutrons, after the reaction, the atom has 82 protons and 84 neutrons, it suggests that the atom has lost 2 protons and 2 neutrons.
Therefore, the atom emitted an alpha particle in a nuclear reaction, hence option C is correct.
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Joseph divides 8.64 by 2.0. How many significant figures should his answer have?
Answer:
2 significant figures
Good luck with your work! :)
12. Which is true of this cell as the redox reaction is
taking place?
1) The mass of Al electrode will increase, and
the mass of Ni electrode will decrease.
2) The mass of Al electrode will decrease, and
the mass of Ni electrode will increase.
3) The mass of Al electrode will increase, and the
mass of Ni electrode will remain the same.
4) The mass of Al electrode will remain the same,
and the mass of Ni electrode will increase.
Conuri
Summarize: If you know the RGB values of two colors of light, how could you calculate the RGB value of a mixture of the two colors? _______________________________________
_________________________________________________________________________
Which conditions will increase the rate of a chemical reaction?.
Answer:
temperatures
enzyme activity
Which weather condition is NOT associated with warm fronts??
Answer:
A Winter storm usually does not come with a warm fronthey warm front.
Explanation:
When the front passes over an area it means to change in the weather. Many. Many friends cause weather events such as rain thunderstorms gusty winds tornadoes and hurricanes.
10 points get it right ADVPH
Answer:
Advanced Pharmaceutics Inc
Explanation:
Advanced Pharmaceutics Inc
somehow I know this acroynom
please help I'm stuck on this!
What effect does sunlight have on CO2 molecules?
Answer:
Carbon Dioxide is not affected by sunlight. But the radiation changes direction when it hits a carbon dioxide molecule
Explanation:
On a hot summer day Dylan's mom gets him a fully inflated birthday balloon at a nearby City Party. A few minutes after stepping out of the store, the balloon exploded just before she got into her car.
What advice would you provide if City Party has to fill another balloon for her that same hot day?
a) fill balloon just like before
b) fill balloon with slightly more air than before
c) fill balloon with cold air
d) fill balloon with slightly less air than before
Answer:
the answer is d slightly less
Toda [4 MARKS] GROUP D: HIGHER ABILITY (HA) 74.2073 Supp. Q.No. 25 केही वस्तुहरूको घनत्व तालिकामा दिइएको छ। उक्त तालिका अध्ययन गरी निम्न प्रश्नहरूको उत्तर दिनुहोस् । (Density of some substance is given in a table. Study the table and answer the following questions:) वस्तु (Substances) घनत्व (Density) X 11 gm/cm Y 8 gm/cm 2Z 0.9 gm/cm i. समान पिण्ड भएका तीनओटा मध्ये सबभन्दा कम आयतन कुन वस्तुको होला ? (Which substance will have least volume if equal masşes of all are taken?) ii. समान आयतन भएका तीनैओटा मध्ये सबभन्दा कम पिण्ड कुन वस्तुको होला ? (Which substance will have the least mass if equal volume of all are taken?) iii. कुन वस्तु पानीमा उविएला ? (Which one will float on water?)
Answer:
Explanation
substance X will have least volume because it has maximum density and using the relation volume inversly propotional to the density of a substance.
substance Z will have least mass beacause it has least density and using relation mass is directly proportional to the volume of a substance .
substance Z will float in water because its density is less than the water (1 gm/cm^3).
A sample of no2 occupies 16,500 ml at stp. How many no2 molecules are in the sample?.
According to Avogadro's law equal volume of all gases at the same temperature and pressure contain equal number of molecules. At STP one mole of any gas behaving ideally occupies a volume of 22.414 L.
What is molar volume?The volume occupied by one mole of a substance at a given temperature and pressure is defined as the molar volume at that temperature and pressure. The value of molar volume of an ideal gas at STP is important in stoichiometric calculations.
At STP, the number of molecules of a gas is given as:
Number of molecules of a gas (N) = V₀ in L / 22.414 × 6.022 × 10²³
Here V₀ in L = 16500 = 16.5 L
N = 16.5 / 22.414 × 6.022 × 10²³
N = 4.433 × 10²³
Thus the number of molecules present is 4.432 × 10²³.
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. If 3 moles of calcium reacts with 3 moles of oxygen, then a Which substance is the limiting reactant? b How many moles of calcium oxide are formed?
Let's see the balanced equation
[tex]\\ \rm\Rrightarrow 2Ca+O_2\longrightarrow 2CaO[/tex]
Hence
As moles are equal given
Ca should be the limiting reagent2mol Ca produces 2 mol CaO3mol Ca produces 3mol CaODistinguish between an acidic and a basic oxide.
(Select all that apply.)
A basic oxide is an oxide that reacts with acids.
An acidic oxide is an oxide that reacts with acids.
In a basic oxide, element forms covalent bonds with oxygen.
In an acidic oxide, element forms ionic bonds with oxygen.
In an acidic oxide, element forms covalent bonds with oxygen.
In a basic oxide, element forms ionic bonds with oxygen.
An acidic oxide is an oxide that reacts with bases.
A basic oxide is an oxide that reacts with bases.
Answer:
an acidic oxide reacts with bases and the seconf
In order to make a covalent bond, the orbitals on each atom in the bond must overlap.
Answer:
true
Explanation:
Covalent bonds are formed through the overlap of half-filled valence orbitals. Because of the overlapping, it is most probable that electrons are located within the region of the bond.
In order to make a covalent bond, the orbitals on each atom in the bond must overlap. Therefore, the given statement is true.
What is covalent bond?A covalent bond is an electron exchange usually results in the production of electron pairs between atoms. These electron couples are referred to as bonding pairs as well as sharing pairs. Covalent bonding seems to be the permanent equilibrium of atoms' forces of attraction versus attraction when atoms share electrons.
Because to electron sharing, each atom in a number of molecules can achieve the corresponding amount of the valence shell, resulting inside a stable electronic configuration. In organic chemistry, covalent bonds are far more common than ionic ones. In order to make a covalent bond, the orbitals on each atom in the bond must overlap.
Therefore, the given statement is true.
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An atom is electrically neutral because
(a) neutrons balance out the protons and electrons.
(b) nuclear forces stabilize the charges.
(c) the number of protons and electrons are equal.
(d) the numbers of protons and neutrons are equal.
Answer:
c
Explanation:
neutrons have no charge
protons and electrons have opposite charges and balance each other out in equal numbers
What is the temperature change if 400 J of energy is added to 10 grams of water
A) 40 degrees Celsius
B) 1 degrees Celsius
C) 100 degrees Celsius
D) 10 degrees Celsius
The temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.
How to calculate temperature change?The temperature change of a calorimeter can be calculated using the following expression:
E = mc∆T
Where;
E = energy in joulesm = massc = specific heat capacity = 4.18J/g°C∆T = change in temperature400 = 10 × 4.18 × ∆T
400 = 41.8∆T
∆T = 400/41.8
∆T = 9.57°C
Therefore, the temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.
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what are some acidic experiments and what information will the experinments provide? And how is it important to do those exerinement?
Answer:
The pH scale measures whether there is more hydronium or hydroxide in a solution. In other words, it tells us how basic or acidic the solution is. A lower pH means something is more acidic, also known as a stronger acid. A higher pH means it is more alkaline or a stronger base.