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Answer:

Sour and Possible Burns

Explanation:

Bases are soapy, not acids.

All acids are sour to taste.

Neither bases nor acids are sweet.

Sharp is a physical trait for things such as knives, not acidic liquids.

Acids can cause burns if handled incorrectly.

You can't usually just use a single spectrum line to confirm the identity of an element because there are cases that the emission line id not clearly defined. When the emission line is very weak compared to surrounding noise, in which case the more datapoints you have to build up confidence for the existence of a particular emission spectra, the better.

Glycerol has the stronger intermolecular attraction because it is more viscous and has a larger molar mass.

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 :)

In the Lewis symbol for a fluorine atom, there are 4 paired and 1 unpaired electrons.

However, paired electrons simply means are 2 electrons occupying the same orbital in an atom or molecule of a substance

On the other end, unpaired electron is a single electron that occupies an orbital of an atom.

An atom is the smallest part of an element which can take part in a chemical reaction.

Some atoms of elements are:

In conclusion, in the Lewis symbol for a fluorine atom, there are 4 paired and 1 unpaired electrons.

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Answer: 6, 1

Explanation:

The pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.

The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "pressure P times volume V is equal to moles times temperature and the universal gas constant. It is expressed;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).

Given the data in the question;

We substitute our values into the expression above to determine the pressure of the gas in atmospheres.

PV = nRT

P = nRT / V

P = ( 6mol × 0.08206Latm/molK × 238K ) / 22L

P = 117.18168Latm / 22L

P = 5.33atm

Therefore, the pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.

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Answer:

C

Explanation:

because 37 does not end with 5 or 0, so it'd be harder to see if the water temperature is accurate if your thermometer goes up by 5s or 10s. And using D, the one that goes up by 20s is out of the question, it'd be too difficult to read. Using a thermometer that goes up by 1s is just best because you can be positive when the water is at 37°C

Answer:

0.67

Explanation:

Molality is mols of solute over kilograms of solvent
there are 58/174 mols of solute, and 0.5 kg of solvent
(58/174)/0.5=0.6666...
Round to the nearest hundreth to get 0.67

Answer:

A. would be your answer

Explanation:

Decomposers are especially important in retaining nutrients in their cells thus preventing loss of those nutrients from the root zone.

In an ecosystem, the decomposing web is important because decomposers help remove waste and use that energy to provide food for other animals.

An 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 ecosystem 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 .Living organisms also influence the quantity of biomass  which is present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

OF6

Explanation:

Oxygen and fluorine have almost the same electronegativity, so oxygen isn't able to donate enough electron density to fluorine to form OF6. Atomic size. There isn't enough room around an oxygen atom for six fluorine atoms.

:-befrank

Hii there !

The reaction accompanying production of water in this case would be -

[tex]\green{ \underline { \boxed{ \sf{2H_2+O_2\longrightarrow 2H_2O}}}} [/tex]

Thus ,by observing the reaction, we can conclude that 2 mole of Hydrogen [tex](H_2 )[/tex]react with 1 mole of oxygen[tex](O_2)[/tex]to produce 2 mole of water [tex](H_2O)[/tex]

Now,

To produce 1 moles of water.

Moles of Oxygen[tex](O_2)[/tex] required [tex] = \frac{1}{2}[/tex] moles

Similarly,

To produce 4 moles of water.

[tex]\implies[/tex] Moles of Oxygen[tex](O_2)[/tex] required = [tex]\frac{1}{2}\times 4[/tex] moles

[tex]\implies[/tex] 2 moles

Hope it helps.

The original mass of krypton 81 that is present in the ice is 6.70 grams.

Original mass of any substance will be calculated as below for the decomposition reaction is:

N = N₀(1/2)ⁿ, where

N = remaining mass of krypton-81 = 1.675g

N₀ = original mass of krypton-81 = ?

n will be calculated as:
n = T/t, where

T = total time period = 458,000 years

t = half life time = 229,000 years

n = 458,000/229,000 = 2

Now putting all these values on the above equation, we get

N₀ = 1.675 / (1/2)²

N₀ = 6.70 g

Hence required mass is 6.70 g.

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Explanation:

Q. What can you infer about magnetic domains from the fact that they are arrangements of atoms? The individual domains are extremely small.

Answer:

Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.

Explanation:

Answer:

The mass per unit volume of a substance is called density of that substance.

Explanation:

So, How does it works ?

For example: Density of gold is 19300kg/cubic meter. It means that if there gold having volume of a cubic meter its mass will be 19300 kg... Density of plastics are less than that of density of metals... I.e. if we take plastic having volume 2 cubic meter & gold having volume 1 cubic meter we will find mass of gold is far more compared to that of plastic.. Thus, density refers how much tightly the molecules of a substance are bonded together.

Answer:

burrowers

Explanation:

Answer:

Hi! I hope you're having a wonderful day, if not, I hope it gets better, much love and kindness! Be great!

The minimum amount of NaOH and HCl that must be present to produce 18.48grams of NaCl is 12.6g and 11.5g  respectively.

The balanced neutralization reaction equation for the formation of NaCl is,

NaOH + HCl ---> NaCl + H2

The molar mass of NaOH = 23+16+1 = 40g/mol

The molar mass of NaCl = 23 +35.5 = 58.5g/mol

If  40g of NaOH = 58.5g of NaCl

∴ x g of NaOH   = 18.48g of NaCl

Make xg the subject of formula,

x g of NaOH = 40 × 18.48/58.5

                     = 739.2/58.5

                     = 12.6g of NaOH

The molar mass of HCl = 1 +35.5 = 36.5g/mol

If  36.5g of  HCl= 58.5g of NaCl

∴ x g   of HCl       = 18.48g of NaCl

Make xg the subject of formula,

x g of HCl       = 36.5 × 18.48/58.5

                       = 674.52/58.5

                       = 11.5g of HCl

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Answer:

1.85 g of hydrogen gas will form!

Explanation:

1. Write the balanced equation.

Zn

+

2HCl

→

ZnCl

2

+

H

2

2. Calculate the moles of

Zn

.

Moles of Zn

=

30.0

g Zn

×

1 mol Zn

65.38

g Zn

=

0.4589 mol Zn

3. Calculate the moles of

H

2

.

Moles of H

2

=

0.4589

mol Zn

×

2 mol H

2

1

mol Zn

=

0.9177 mol H

2

4. Calculate the mass of

H

2

.

Mass of H

2

=

0.9177

mol H

2

×

2.016 g H

2

1

mol H

2

=

1.85 g H

2

Answer:

About 2.29 M.

Explanation:

Recall that molarity is defined by moles of solute over liters of solution.

Our solute is 105 grams of calcium nitrate (Ca(NO₃)₂)).

Convert 105 grams of Ca(NO₃)₂ to moles. The molecular weight of Ca(NO₃)₂ is 164.10 g/mol:

[tex]\displaystyle 105\text{ g Ca(NO$_3$)$_2$}\cdot \frac{1\text{ mol Ca(NO$_3$)$_2$}}{164.10\text{ g Ca(NO$_3$)$_2$}} = 0.640\text{ mol Ca(NO$_3$)$_2$}}[/tex]

Convert 280. grams of water to liters. Recall that the density of water is given by 1.00 g/mL:

[tex]\displaystyle \begin{aligned} D & = \frac{m}{V} \\ \\ V & = \frac{m}{D} \\ \\ & = \frac{(280.\text{ g})}{\left(\dfrac{1.00\text{ g}}{1\text{ mL}}\right)} \\ \\ & = 280. \text{ mL}\cdot \frac{1\text{ L}}{1000\text{ mL}} = 0.280\text{ L soln.}\end{aligned}[/tex]

Hence, the molarity of the solution is:
[tex]\displaystyle \begin{aligned} \text{M} &= \frac{\text{ mols solute}}{\text{L soln.}} \\ \\ & = \frac{(0.640\text{ mol})}{(0.280\text{ L soln.})} \\ \\ & = 2.29\text{ M} \end{aligned}[/tex]

In conclusion, the solution is about 2.29 M.

Answer:

CO2 molecules don't really interact with sunlight's wavelengths. Only after the Earth absorbs sunlight and reemits the energy as infrared waves can the CO2 and other greenhouse gases absorb the energy.

Explanation:

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Carbon dioxide molecules don't directly react with the sunlight but they can absorb the energy in the form of infrared waves when it is emitted after reflection through the Earth's surface.

Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).

[tex]CO_2[/tex] molecules don't really interact with sunlight's wavelengths. Only after the Earth absorbs sunlight and reemits the energy as infrared waves can the [tex]CO_2[/tex] and some other greenhouse gases absorb the energy.

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Answer:

this is because the salt may be acidic and also may have oxygen substituent which can lead to rust

During cold winters, the salt present on the roads reacts with the iron and the dew water and results in the formation of the iron oxide as rust.

The rust has been given as the iron oxide compound, that has been formed with the reaction of the water with the iron in the presence of oxygen.

In the winters, there has been the presence of the water in the salt, and the interaction of the salt with the iron to form the iron oxide that is rust.

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A. applied force

force applied to an object

Answer:

A. Applied force

Explanation:

A. should be the answer because you applied force onto an object to make it move or do what you’d like.

I hope it helps! Have a great day!

Muffin~

Answer:

DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation.

A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. If the two DNA profiles are a match, then the evidence came from that suspect.

Based on the table and the equation of reaction; the

The rate of a reaction is the rate at which reactants molecules are consumed or products are formed.

Based on the equation of reaction, the rate of consumption of oxygen is equal to the rate of consumption of methane.

Thus. rate of consumption of oxygen from time 20 seconds to time 60 seconds is calculated as follows:

Rate between 20 and 40 = 1.0 - 0.9/20

Rate between 40 and 60 = 0.9 - 0.85/20

Therefore, the rate of consumption of oxygen decreases with time.

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Answer:

net force depends upon the object and also the mass of that object

Answer:The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

Explanation:

Answer:

if you meant 3.82* 10^24, the answer is 6.34551495 moles

if you meant 3.28*1024, the answer is 6.49780731*10^-21 moles

since you're going from molecules to moles, you need to divide by Avogadro's number which is 6.02*10^23

Answer:

A

Explanation:

A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

An ideal gas is that whose particles have negligible volume and intermolecular forces.

A 1.50 L vessel at 25.0 °C contains He at a pressure of 3.04 atm.

We will use the following expression.

K = °C + 273.15 = 25.0 + 273.15 = 298.2 K

We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 3.04 atm × 1.50 L / (0.0821 atm.L/mol.K) × 298.2 K = 0.186 mol

The molar mass of He is 4.00 g/mol.

0.186 mol × 4.00 g/mol = 0.744 g

A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

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