Answer:
Correct answer-C 5.3g
Explanation:
Molarity = no. of moles of solute/ volume of of solution in litre
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,so the mass of 0.03125 moles of AgNO3 = 0.03125×169.87= 5.3084g
The grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water is 5.3 grams.
How do we calculate mass from moles?Moles is a unit which is used to define any amount and it is calculated as:
n = W/M, where
W = required mass
M = molar mass
Given molarity of AgNO₃ = 0.125 M
Volume of water = 250mL = 0.25L
moles (n) from the molarity (M) will be calculated as:
n = M × V
n = (0.125)(0.25) = 0.0312 moles
Now we calculate the mass of AgNO₃ by using the above formula as:
W = (0.0312mol)(169.87g/mol)
W = 5.30 g
Hence option (c) is correct.
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The ocean has both deep currents and surface currents moving it around the Earth.
1.True
2.False
Answer: 1
Explanation: This is true.
Which Chemical Reaction is balanced?
Answer:
A
Explanation:
The letter A is the correct answer
which equation is an example of a synthesis reaction
A. S+O2=SO
B. CH4+202=2H20+CO2
C. HNO3+KOH=KCl+H2O
D. 2Li+CaCl2=2LiCl+Ca
Answer:
It’s A sugar
Explanation:
(b)
Magnesium sulphate can be made from magnesium and dilute sulphuric acid.
This is the equation for the reaction.
Mg
+
H2SO4
MgSO4
+
H2
Calculate the mass of magnesium sulphate that would be obtained from 4g of
magnesium
(Show your working.)
Answer:
Reaction
Mg+H2SO4 ----》MgSO4+H2
so calculate the moles of magnesium first
moles of magnesium = given mass of mg/molar mass of magnesium
moles = 4/24.30
moles = 0.1646
One mole of magnesium produces one mole of magnesium sulphate
so 0.1646 moles of mg will produce 0.1646 moles of MgSO4
Mass of MgSO4 = 0.1646× 120.366
MgSO4 = 19.81 gm
conclusion the mass of magnesium sulphate that would be obtained from 4g of
magnesium is 19.81 gm!!
I d k it's right or wrong but i tried :)
How many molecules of As4010 are in 6.2 mol of As4010?
What is the molar mass for 5 mol Na
Answer:
22.98977 g/
Brainliest please
Answer:
molecular mass if Na
2
Co
3
=2×23×12+3×16
=46+12+48
=106
no.of mole =
molecular wt.
Given wt.
5=
106
wt
wt=s30
Explanation:
1. What is the major determining factor in soil formation? Define this factor and explain how it influences soil formation.
PLEASE HELP ME PLEASE
Answer:
Temperature and precipitation
Explanation:
They determine how quickly weathering will be, and what kind of organic material may be available on the inside of the soils.
Temperature and precipitation is the major determining factor in soil formation. They define the type of organic material that can be present inside the soils as well as how rapidly weathering will occur.
What is soil?The bioactive, porous media that has grown in the top layer of the Earth's crust is known as soil. Being a source of water as well as nutrients, a filter for harmful wastes, a site for their breakdown, and a participant inside the cycle of elements such as carbon through the planet's ecosystem, soil constitutes one of the main substrates of life on Earth.
It has changed as a result of weathering processes influenced by geographical, geologic, biological, and climatic factors. A practical understanding of soils including their management has also developed out of need since the development of agriculture with forestry in the eighth millennium BCE. Temperature and precipitation is the major determining factor in soil formation. They define the type of organic material that can be present inside the soils as well as how rapidly weathering will occur.
Therefore, temperature and precipitation is the major determining factor in soil formation.
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Scott and his family recently moved to a large city, where the air sometimes looks hazy from smog. These four steps could result in the formation of this smog:
Ozone forms.
Polluting gases react with sunlight.
Temperature inversion traps pollution.
Cars emit hydrocarbons and nitrogen oxides.
Which answer shows the order in which these steps occur?
A. 1, 2, 3, 4
B. 1, 2, 4, 3
C. 4, 1, 2, 3,
D. 4, 2, 1, 3
Answer:
D. 4, 2, 1, 3 is the correct answer.[tex] \infty \infty [/tex]
Organisms that need nitrogen to survive are
all living organisms.
only animals.
only bacteria.
only plants.
Answer:
Correct option is
A) all living organisms
animal,plant,bacteria somehow everybody is dependent on nitrogen same as oxygen!
Determine the mass in grams of 0.69 mol of gold (Au)
Answer:
We assume you are converting between moles Gold and gram. You can view more details on each measurement unit: molecular weight of Gold orgrams The molecular formula for Gold is Au. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Gold, or 196.96655grams.
What caused the formation of Mammoth Caves?
How many moles are in 5.8 x 1024 atoms of C?
Answer:
No of moles of carbon = 9.63 mol
Explanation:
No of atoms of carbon = 5.8 × 10²⁴
Avogadro's no. = 6.022 × 10²³
No. of moles = No. of atoms / Avogadro's no.
N = 5.8 × 10²⁴ / 6.022 × 10²³
N = 9.63 mol
∴ No of moles of carbon = 9.63 mol
Help, please :] What are the products of the reaction between magnesium and silver nitrate??
Answer:
magnesium(s) + silver nitrate(aq) → magnesium nitrate(aq) + silver(s). The reducing agent in this reaction is the Mg as it will donate electrons to the silver ions .
Explanation:
Convert 500.0 mL at 740.0 mm of Hg to its new volume at 780.0 mmHg. 474.4mL
I know that C is a correct answer. But is F correct as well?
Answer: Yes F is also correct.
Explanation:
If you use 65.34 g of Al2S3, how many grams of AICl3 can be produced?
Answer:
sorry po
indi ko po maintindihan
If people had not extracted fossil fuels from Earth to use as energy, would this carbon be "cycling" within the global carbon cycle we have defined today?
Answer: The answer is YES. There would still be recycling of carbon even if it wasn't extracted as fossil fuels for energy use.
Explanation:
Carbon is an element in the periodic table with the atomic number of 12. It has 4 electrons on its outermost shell in the electronic configuration. These are valence electrons which are used to form bonds in a wide range of both organic and inorganic compounds, giving rise to simply molecules like carbondioxide.
CARBON CYCLE is a natural process through which carbon and it's compounds are kept fairly constant through recycling. They are found in fossils fuels such as oil, coal, and natural gas. When these fossil fuels are burnt and used as energy, carbon is released in form of carbondioxide. This is just one of the ways carbon is returned to the atmosphere. Other ways include:
--> respiration of plants and animals
--> decomposition of organic substances
--> action of dilute acids and heat on trioxocarbonates (V) and hydrogen trioxocarbonates (IV).
Carbon is then removed from the atmosphere through:
--> plants in photosynthesis
--> rain water as weak trioxocarbonate (IV) acid.
Therefore, there would still be recycling of carbon even if it wasn't extracted as fossil fuels for energy use because the burning of fossil fuels is not the only way carbon is returned to the atmosphere during carbon cycle.
Place the characteristics for each phase of matter into the table where it belongs
Answer:
Solid- Definite shape
Solid and Liquid- Definite volume, Not easy to compress, if at all
Gas- No Definite Volume
Liquid and Gas- No Definite shape
The characteristics for each phase of matter in the table where it belongs are as follows:
Solids: Definite shape, very little particle motion. Liquids: Fluid motion. Gases: No Definite Volume, easily compressed. Solids and liquids: Definite volume, Not easy to compress, if at all. Liquids and Gases: No Definite shape, constant, fast particle motion. What are the different States of matter?The states of matter may be defined as the three distinct physical forms which matter can take in most environments. They are as follows:
Solid.Liquid.Gas.Each of the states of matter significantly possesses specific chemical and physical properties. For example, solids generally have a definite volume, are relatively rigid, and atoms or molecules are attached to each other very compactly.
Liquids possess a definite volume and have the ability to alter their shape through flowing. The atoms are loosely bonded to one another.
Gas has no definite volume or shape. This state of matter is easily compressed as well.
Therefore, the characteristics for each phase of matter in the table where it belongs are well described.
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The acidic ingredient in vinegar is acetic acid. The pH of vinegar is around 2.4, and the molar concentration of acetic acid in vinegar is around 0.85 M. Based on this information, determine the value of the acid ionization constant, Ka, for acetic acid.
Answer: The value of acid ionization constant [tex]K_a[/tex] for acetic acid is [tex]1.87\times 10^{-5}[/tex]
Explanation:
[tex]CH_3COOH\rightarrow H^+CH_3COO^-[/tex]
cM 0 0
[tex]c-c\alpha[/tex] [tex]c\alpha[/tex] [tex]c\alpha[/tex]
So dissociation constant will be:
[tex]K_a=\frac{(c\alpha)^{2}}{c-c\alpha}[/tex]
Give c= 0.85 M and [tex]pH[/tex] = 2.4
[tex]pH=-log[H^+][/tex]
[tex][H^=}=c\times \alpha=10^{-2.4}=3.98\times 10^{-3}[/tex]
[tex]K_a=?[/tex]
Putting in the values we get:
[tex]K_a=\frac{(3.98\times 10^{-3})^2}{(0.85-3.98\times 10^{-3})}=1.87\times 10^{-5}[/tex]
Thus the value of acid ionization constant [tex]K_a[/tex] for acetic acid is [tex]1.87\times 10^{-5}[/tex]
What types of matter consist of particles that are highly organized?
Answer: Solids
Explanation:
Solids have a definite volume and structure. These are comprised of atoms, ions, and molecules closely packed together giving a confined structure to the solids. The particles are bound with strong force of attraction. The particles in the solid are arranged in an repeated, orderly, and three dimensional pattern. Depending upon the substance of the solid the particles within the solid can be ions, atoms, and can be molecules.
Someone who knows the answer to this .
what is einsteins theory of relativity?
Answer:
The laws of the universe are for all observers, and it was shown that the velocity of light in spacetime will be the same regardless of the subject's speed.
Explanation:
The principle outlines how things behave in time and space, so it could be used to model anything from black hole life to light shifting due to the gravitational, as well as the action of the terrestrial Planets in its orbit. Einstein's most popular hypothesis has far-reaching ramifications.
2. Energy that is stored in an object because of its temperature is called ___________________. *
Answer:
Thermal Energy
Explanation:
The thermal energy of an object increases as the temperature increases, causing atoms and molecules to move faster. When the temperature decreases, the thermal energy decreases, causing atoms and molecules to move slower. Another term for thermal energy is heat energy.
Why is it important for the daughter cells to divide a second time in meiosis?
The second division switches parts of matching chromatids to increase genetic variation.
The second division forms four identical cells to ensure that all offspring have the same
The second division sorts chromosomes into cells that are the same as the parent cells.
The second division forms haploid cells that can combine with other haploid cells during fertilization.
Answer:
The second division switches parts of matching chromatids to increase genetic variation.
Explanation:
Meiosis and fertilization create genetic variation by making new combinations of gene variants (alleles).
Is a flashlight turned on kinetic or potential energy ?
What is the overall rate order of the following reaction a + 2b → c + d ?
a zero
b first
c second
d third
Answer:
I think zero is the answer^_^
CH=C-CH=CH– CH = CH, what is the name of this molecule?
Answer:
pent-3-ene-1-yne
Explanation:
1 2 3 4 5
CH ≡ C - CH = CH - CH3
IUPAC name : Pent-3-ene-1-yne
What is the pH of a 1.0 x 10-4 M solution of KOH?
Answer:
pH = 10
Explanation:
KOH is a strong base; thus it will completely dissociate:
KOH -> K⁺ + OH⁻
Since it completely dissociates, the concentration of both K⁺ and OH⁻ will be the concentration of KOH given (1.0 x 10^-4 M).
We can then find pOH by taking the negative log of the OH⁻, or hydroxide, concentration:
pOH = -log[OH⁻] = -log[1.0 x 10^-4 M] = 4
At 25 degrees Celsius, pH + pOH = 14. If we solve for pH and then plug in our pOH, we get:
pH = 14 - pOH = 14 - 4 = 10
The pH of a 1.0 x 10^-4 M solution of KOH is thus 10.
Changes in ocean currents and winds can greatly affect climate through which process?
solar flares
El Nino/La Nina
pollution
plant growth
Answer:
The correct answer is B) El Nino/La Nina
Explanation:
El Nino and La Nina are climate patterns that can cause modification to the global weather conditions. They are present in the Pacific Ocean.
El Nino is Spanish for Little Boy. It is characterised by warm weather, while La Nina in Spanish refers to Little Girl. La Nina is characterized by cool/cold currents.
Cheers
Answer:
temperature
Explanation:
Soil has a specific heat capacity of 1.700J/g C. During the day, the temperature of soil in a
flowerpot increased from 15.6°C to 35.5°C. If the energy from the sun was calculated to be 251 175J,
what was the mass of the soil? Show your work.
Answer:
m = 7.42 kg
Explanation:
Given that,
The specific heat of the soil, c = 1.700J/g C
The temperature of soil in a flowerpot increased from 15.6°C to 35.5°C.
The energy released from the Sun is 251175 J. We need to find the mass of the soil.
We know that,
[tex]Q=mc\Delta T\\\\or\\\\m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{251175}{1.7\times (35.5-15.6)}\\\\m=7424.62\ g[/tex]
or
m = 7.42 kg
So, the mass of the soil is equal to 7.42 kg.
