How many grams of sodium nitrate (NaNO2) will dissolve in 100g of water at 20°C?​

Answer:

23.34mole of CO2

Explanation:

C6H12O6 + 6O2 => 6CO2 + 6H20

Molar mass of C6H12O6 = 180g/Mol

No of mole of C6H12O6 = 3.89mol

1 mol of C6H12O6 gives 6mole of CO2

3.89mol of C6H12O6 gives X mole of CO2

X = 3.89×6 = 23.34mole

2NaOH + CuBr2 => 2NaBr + Cu (OH)2

Answer:

Mass = 32 g

Explanation:

Given data:

Mass of O₂ needed = ?

Mass of NH₃ react = 13.6 g

Solution:

Chemical equation:

4NH₃ + 5O₂   →  4NO + 6H₂O

Number of moles of ammonia:

Number of moles = mass/ molar mass

Number of moles = 13.6 g/ 17 g/mol

Number of moles = 0.8 mol

Now we will compare the moles of ammonia and oxygen from balance chemical equation.

                         NH₃          :            O₂

                           4            :               5

                          0.8          :         5/4×0.8 = 1

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 1 mol × 32 g/mol

Mass = 32 g

Final answer:

To react 13.6 grams of NH₃ completely, one needs 32 grams of O₂ based on the balanced chemical equation and stoichiometric calculations.

Explanation:

To determine how many grams of O₂ are needed to react with 13.6 g of NH₃, we need to follow stoichiometric principles based on the balanced chemical equation. The reaction 4NH₃ (g) + 5O₂ (g) → 4NO (g) + 6H₂O (l) indicates that 4 moles of NH₃ react with 5 moles of O₂.

Firstly, we calculate the number of moles of NH3 we have:

Therefore, 13.6 grams of NH₃ require 32 grams of O₂ to react completely according to the given chemical equation.

Answer:

6M

Explanation:

No of mole = concentrate × volume

n= c × V

C= n/V

V=500mL=0.5L

C= 3/0.5=6M

Answer:

The equation represents a neutralization reaction.

50.05% is the percent yield if 17.4g of sodium hydroxide is produced when 20.0g of sodium metal reacts with 19g of water.

Explanation:

Balanced chemical equation for the reaction:

2Na + 2 [tex]H_{2}[/tex]O ⇒ 2NaOH + [tex]H_{2}[/tex]

Data given:

mass of NaOH produced = 17.4 grams

mass of Na reacted = 20 grams

mass of water reacted = 19 grams

percent yield =?

atomic mass of Na = 23 grams/mole

atomic mass of water = 18 grams/mole

atomic mass of NaOH = 39.9 grams/mole

number of moles is calculated as:

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

putting the values in above equation to know number of moles:

number of moles of Na = [tex]\frac{20}{23}[/tex]

                                       = 0.869 moles

number of moles of water = [tex]\frac{19}{18}[/tex]

                                            = 1.05 mole

number of moles of NaOH = [tex]\frac{17.4}{40}[/tex]

                                             = 0.435 moles

limiting reagent in the reaction is Na

2 moles of Na reacted to give 2 moles of NaOH

So, 0.869 moles of NaOH will give 0.869 moles of NaOH

Grams of NaOH = 34.76 grams (theoretical yield)

2 moles of water will give 2 moles of NaOH

Hence, 1.05 moles will give 1.05 moles of NaOH

grams of NaOH = 42 grams

percent yield = [tex]\frac{actual yield}{theoretical yield}[/tex]

putting the values in the equation:

percent yield = [tex]\frac{17.4}{34.76}[/tex] x100

                     = 50.05 %

50.05 % is the percent yield.

Answer:

The strong force is very strong, always attractive, and very short-ranged. The electromagnetic force is much weaker, can be attractive or repulsive, and can operate over large distances.

Explanation:

The electromagnetic force between two charges increases with increase in magnitude of the charges and decreases with increase in distance between the charges.

The force between two charges is determined by Coulomb's law, which states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of distance between the two charges.

Electromagnetic force between two charges is calculated as follows;

[tex]F = \frac{kq_1q_2}{r^2}[/tex]

where;

Thus, the electromagnetic force between two charges increases with increase in magnitude of the charges and decreases with increase in distance between the charges.

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Answer:

I would say A

Explanation:

our ancestors are the people that lived long before us

Answer: TRUE

Explanation: I’d say it is true because lava comes out of volcanos and lava is obviously VERY hot so it must help warm the planet by realizing carbon dioxide.

Answer: The Molarity of the Chloride ion in a 5M  [tex]AlCl_3[/tex] solution is 15 M

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n= moles of solute

[tex]V_s[/tex] = volume of solution in ml

[tex]AlCl_3\rightarrow Al^{3+}+3Cl^-[/tex]

Now as 1 mole of [tex]AlCl_3[/tex] gives 3 moles of [tex]Cl^-[/tex]

5 moles of [tex]AlCl_3[/tex] gives =[tex]\frac{3}{1}\times 5=15[/tex] moles of [tex]Cl^-[/tex]

Thus Molarity of the Chloride ion in a 5M [tex]AlCl_3[/tex] solution is 15 M

Answer:

ionic compounds contain both types of ions,like postie or negative

Explanation:

Answer: 180g

Explanation:

No of moles= volume ×molarity/1000

Volume is given as 750ml

Molarity is given as 6M

Substitute to get the mole

No of moles = 750×6/1000

No of moles= 4.5moles

Remember that

No of moles also = mass given/molar mass

Molar mass of NaOH

Na= 23

O=16

H=1

Molar mass = na +o+h

Molar mass =23+16+1

Molar mass=40g/mol

Substitute

No of moles = mass given/molar mass

Mass = 4.5×40

Mass = 180g

The mass of NaOH needed is 180g

The isotopes hydrogen-2 (deuterium) and hydrogen-3 (tritium) differ in the number of neutrons in their nuclei. Option B is the answer.

The isotopes hydrogen-2 (deuterium) and hydrogen-3 (tritium) have different numbers of neutrons in their nuclei. Deuterium has one more neutron than hydrogen-1, while tritium has two more neutrons than hydrogen-1. The difference in the number of neutrons gives these isotopes different properties and behaviors.

Option B is the correct answer: tritium has one more neutron than deuterium. The number of electrons and protons in isotopes of an element remains the same, so options A and C are incorrect. Option D is also incorrect because deuterium and tritium are different isotopes of hydrogen with different numbers of neutrons.

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Answer:

8 m

Explanation:

by using well known formula

[tex]s=\frac{W}{F}=\frac{56}{7}=8[/tex]

To determine the distance a sled can be pushed with 7 N of force and 56 J of work done, you divide the work by the force, which yields a distance of 8 meters.

To find out how far you can push a sled by applying a force of 7 N, which resulted in 56 J of work, you use the work formula:

In the above, W = 56 J and F = 7 N. To find the distance (d), you rearrange the formula to solve for d:

Now plug in the values:

Therefore, you can push the sled 8 meters by exerting a force of 7 N if the amount of work done was 56 J.

Answer:

0.071 mole

Explanation:

As discovered from Avogadro's hypothesis, 1 mole of any substance contains 6.02x10^23 molecules.

This simply means that 1 mole of H3PO4 also contains 6.02x10^23 molecules.

If 1 mole H3PO4 contains 6.02x10^23 molecules,

Then, xmol of H3PO4 will contain 4.3x10^22 molecules i.e

Xmol of H3PO4 = 4.3x10^22/6.02x10^23 = 0.071 mole

From the calculations made above, 4.3x10^22 molecules of H3PO4 have 0.071 mole of H3PO4

Using Avogadro's number, you can find there are approximately 0.71 moles in 4.3 x [tex]10^{22}[/tex] molecules of H3PO4.

To find out how many moles are in 4.3 x [tex]10^{22}[/tex] molecules of H 3 PO 4, you want to use Avogadro's number, which is 6.022 x [tex]10^{23}[/tex] molecules per mole. To find the number of moles:

Number of moles = (Number of molecules) / (Avogadro's constant)

4.3 x [tex]10^{22}[/tex] molecules H3PO4 / (6.022 x [tex]10^{23}[/tex] molecules/mole) = 0.71 moles H3PO4.

So, there are approximately 0.071 moles in 4.3 x[tex]10^{22}[/tex] molecules of H3PO4.

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Final answer:

The rapid change in Earth's climate is primarily due to the burning of fossil fuels, which has led to increased greenhouse gas emissions and trapped more solar radiation in our atmosphere. Seventeen of the warmest years on record have occurred since 2000, highlighting the swift pace of climate change due to human activities.

Explanation:

The Earth's climate has undergone rapid changes in recent years, largely due to human activities rather than natural climatic variations. The most significant factor causing this rapid climate change is the burning of fossil fuels, leading to increased levels of greenhouse gases, such as carbon dioxide, in the atmosphere. This human-induced acceleration of climate change is clearly demonstrated by the fact that we have witnessed 17 of the 18 warmest years on record since the year 2000. Option C

Fossil fuels burned for energy during and after the Industrial Revolution have allowed advances in public health, food production, and urbanization. However, this has come at the expense of our environment. The greenhouse gas emissions trap solar infrared radiation, leading to a warming effect. This anthropogenic warming disturbs ecological relationships and has manifold influences on global temperatures, precipitation patterns, polar ice melting, sea levels, and biodiversity.

While natural factors such as volcanic activity, changes in the sun's intensity, and Earth's orbital shifts do contribute to climate variability, the unprecedented rate of current global warming is predominantly tied to human activity. This underscores the urgent need for mitigating greenhouse gas emissions to prevent further environmental degradation.

Answer:

Velocity is the rate of change of displacement( change of distance in a particular direction with respect to time) , and acceleration is the rate of change of velocity per unit of time. ... Also, speed is a scalar quantity but velocity and acceleration are vector quantities.

Explanation:

Answer:

True.

Explanation:

If no modification is there, such as in melting, the property or change is termed physical. In comparison, chemical properties or changes involve changes in the composition of the substance. The ability to react with oxygen is a chemical property

The ability to react with oxygen is a physical property. - False

Chemical properties are characteristics of a substance that describe how it interacts with other substances or undergoes chemical reactions. These properties include reactivity, flammability, acidity or alkalinity (pH), and the ability to form chemical bonds. Chemical properties help identify and classify substances based on their behavior in chemical processes.

The ability to react with oxygen is a chemical property, not a physical property. Chemical properties describe how a substance interacts with other substances and undergoes chemical changes. Reacting with oxygen involves a chemical change where a substance combines with oxygen to form new compounds or undergoes oxidation.

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Both noticed that different atoms gives different colours of light when they are exposed to flame.

Answer:

There is a transfer of electrons between the two atoms which creates a strong bond

Explanation:

Typically these bonds result between a metal and a nonmetal which transfer electrons, because of the transfer of electrons and opposite sigsn (+/-) between the atoms in an ionic bond they tend to form quite a strong attraction to eachother. Look up coulombic attraction for more understanding!

Answer: Earths surface wouldn't have mountains for an example there wouldn't be any if it wasn't for divergent plate boundary

Explanation:

Answer:

1) 3-methylpentane   2)Butyne

Explanation:

On the first molecule, we have a methyl group on the 3rd carbon, so you will have "3-methhyl". It's a 5 carbon molecule with no double bonds, so "-pentane" is required.

On the second molecule, we have a simple 4 carbon molecule with a triple bond which makes it an Alkyne. 4 carbons makes the prefix "but-" and a alkyne males the ending "-yne".

Answer:

3.55atm

Explanation:

We will apply Boyle's law formula in solving this problem.

P1V1 = P2V2

And with values given in the question

P1=initial pressure of gas = 1.75atm

V1=initial volume of gas =7.5L

P2=final pressure of gas inside new piston in atm

V2=final volume of gas = 3.7L

We need to find the final pressure

From the equation, P1V1 = P2V2,

We make P2 subject

P2 = (P1V1) / V2

P2 = (1.75×7.5)/3.7

P2=3.55atm

Therefore, the new pressure inside the piston is 3.55atm

Answer:

2, 3, and 1

Explanation:

red water in hot water

rose to the top of the beaker

warmer than

The red water in hot water model showed convection. In the convection model, the red water on the bottom of the beaker rose to the top of the beaker. This means that the water at the bottom of the beaker was warmer than the water near the top of the beaker.

Convection is the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction (heat diffusion) and advection. Convection is usually the dominant form of heat transfer in liquids and gases.

Note that this definition of convection is only applicable in Heat transfer and thermodynamic contexts. It should not to be confused with the dynamic fluid phenomenon of convection, which is typically referred to as Natural Convection in thermodynamic contexts in order to distinguish the two.

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Your question is incomplete, but most probably your full question was,The particles of a liquid, such as water, are more able to move around than the particles of a solid, such as foil. Water particles with more heat move to areas where there are water particles with less heat. In other words, convection allows heat to be transferred from warmer places to cooler places. Complete the sentences to describe the convection experiment The model showed convection. In the convection model, the red water on the bottom of the beaker This means that the water at the bottom of the beaker was the water near the top of the beaker.

Answer:

The 2nd one

Explanation:

ITS THE RIGHT ANSWER

Acids and bases can be measured using a pH scale. The scale has a range of 0 to 14. An indicator called Litmus paper is used to determine if a chemical is an acid or a basic. Here H₂CO₃ is an acid and its pH is less than 7 whereas KOH is a base whose pH is more than 7. The correct option is C.

The H⁺ ion concentration's negative logarithm is known as pH. As a result, the meaning of pH is justified as the strength of hydrogen. In most cases, the strength of acids and bases is quantified using their pH values.

The activity of the hydrogen atoms determines the pH level since this activity is a reliable predictor of the acidity or alkalinity of the water. The pH scale has a range of 0 to 14, with 7.0 being neutral.

Thus the correct option is C.

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Answer: 0.185 L

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]

where,

[tex]P_1[/tex] = initial pressure of gas = 0.98 atm

[tex]P_2[/tex] = final pressure of gas = 1 atm  (at STP)

[tex]V_1[/tex] = initial volume of gas = 0.165 L

[tex]V_2[/tex] = final volume of gas = ?

[tex]T_1[/tex] = initial temperature of gas = [tex]-34.0^oC=273-34.0=239.0K[/tex]

[tex]T_2[/tex] = final temperature of gas = [tex]273K[/tex]  (at STP)

Now put all the given values in the above equation, we get:

[tex]\frac{0.98\times 0.165}{239}=\frac{1\times V_2}{273}[/tex]

[tex]V_2=0.185l[/tex]

Thus the volume of this gas at STP be 0.185 L

Answer:

562g

Explanation:

Molar mass of Ca = 40g/mol

1 mol gives 6.02×10^23 atoms

Xmol of Ca gives 8.46×10^24 atoms

X= 14.05 mol

No of mol= mass/molar mass

Mass = 40 ×14.05 = 562g.

Answer: Carbon dioxide react with water to produce carbonic acid

so it is a combustion reaction

Explanation: pls mark as brainliest

The sodium has a larger atomic radius than chlorine because it is in column 1. Therefore, option (A) is correct.

Atomic radius can be defined as half of the distance between two adjacent atoms of the same chemical element in a molecule. The atomic radius of chemical elements is of the order of 1.2 x 10⁻¹⁰ m.

The electron cloud around the nucleus acts as the atom's shell. It does not have a fixed shape which makes it difficult to determine the atomic size.

The atomic radius of sodium is larger than that of chlorine. As both Na and Cl belong to the 3rd period, so the atomic size generally decreases across the period as we move from left to right.

The sodium is placed in column 1 while chlorine is placed in column 17. The effective nuclear charge will increase as the atomic number increases. With increased effective nuclear charge electronegativity of the nucleus increases which results in the increased attraction of electrons to the nucleus.

Therefore, the atomic radius of sodium is larger than that of chlorine.

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Answer: Some of the original base remains in the solution.