Question 4 of 16
What is the product(s) in the reaction below?
2Na(s)+2H₂O(I) → 2NaOH(aq)+H₂(g)
A. 2Na(s)+2H₂O(I)
B. 2H₂(g)
C. 2NaOH(aq)+H₂(g)
D. 2HO₂(I)

Answer: SF2 & SF4

Explanation:

Molecular Geometry

SF2 : bend

SF4 : seesaw

SF6 : octahedral

The net ionic equation can be given as Sn²⁺ (aq) + S²⁻ (aq) → SnS (s).

The atoms or molecules on losing or gaining electrons in order to achieve the stable configuration results in the formation of positive or negative charge and are termed as ions.

The ionic equation can be given with the formation of the respective ions of the reactant and the product side.

SnSO₄ (aq) → Sn²⁺ (aq) + SO₄²⁻ (aq)

Na₂S (aq) → 2 Na⁺ (aq)  + S²⁻ (aq)

SnS (s) → did not dissociates as form a solid covalent compound

Na₂SO₄ (aq) → 2 Na⁺ (aq)  + SO₄²⁻ (aq)

The complete ionic equation can be given as:

Sn²⁺ (aq) + SO₄²⁻ (aq) + 2 Na⁺ (aq)  + S²⁻ (aq) → SnS (s)  2 Na⁺ (aq)  + SO₄²⁻ (aq)

Eliminating the common ions on the product and the reactant side:

Sn²⁺ (aq) + S²⁻ (aq) → SnS (s)

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Answer:

73.05g

Explanation:

1.25 mol NaCl * \(\frac{58.44g}{1 mol NaCl}\) = 73.05g

58.44g = molar mass of NaCl

Answer:

1. The compound in medicines should be nonpolar because of many reasons.  First off, it is important for any drug to be able to dissolve itself through the cell membrane which consists of a lipid bi-layer, in order perform its function. Non polar compounds are lipid soluble and can dissolve in the lipid layers. Polar compounds are water soluble and cannot cross the cell membrane. Because of this, scientists need to be sure of using compounds that are nonpolar in nature so they are able to pass through the cell membrane and enter into the blood circulation of the body and perform its function.

2. You need to think about the polarity of the dressing in order for it to turn out well because the different ingredients inside the dressing have to be able to dissolve or mix together well or else the consistency will be clumpy or separated. With polarity only, like-polarities dissolve like-polarities. So you must make sure that all your ingredients are polar or all are nonpolar. If you have some ingredients that are polar and some that are nonpolar, the dressing won’t turn out smooth like you want it to.

Explanation:

ap*x

Answer:

GOD BLESS THE GUY ABOVE THANK YOU!!!

Explanation:

For an electron as a particle, E = \(1/2mv^2\)

For an electron as a particle, the energy E can be described using the equation:

E =  \(1/2mv^2\)

where

This equation represents the kinetic energy of the electron, which is the E is the energy

energy associated with its motion.

This equation assumes classical mechanics and does not take into account relativistic effects that become significant at high speeds close to the speed of light.

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Explanation:

The theoretical volume of ammonia that should be produced in the Haber process if we start with 5.0 L of nitrogen (N2) at standard temperature and pressure (STP) can be calculated as follows:

1 mole of N2 reacts with 3 moles of H2 to form 2 moles of NH3

Thus, the number of moles of N2 present can be calculated using the Ideal Gas Law:

PV = nRT

Where n is the number of moles of gas, R is the gas constant, T is the temperature in Kelvin, P is the pressure in atmospheres, and V is the volume in liters.

At STP (0°C and 1 atm), the volume of one mole of gas is 24.45 L.

Given 5.0 L of N2 at STP, the number of moles of N2 can be calculated as:

n = (PV)/RT = (1 atm)(5.0 L)/(0.0821 atmL/molK)(273 K) = 1.96 moles

The number of moles of NH3 produced can then be calculated as:

n = (2 moles of NH3)/(1 mole of N2) = 2 moles/1 mole = 2 moles

The volume of NH3 can be calculated as:

V = nRT/P = (2 moles)(0.0821 atmL/molK)(273 K)/(1 atm) = 44.8 L

So, the theoretical volume of ammonia (NH3) that should be produced if we start with 5.0 L of N2 at STP is 44.8 L.

The distance of Planet B from the Sun is approximately 0.3149 AU.

Kepler's third law states that the square of the orbital period of a planet is proportional to the cube of its average distance from the Sun. Mathematically, it can be written as:

\(T^2 = (4\pi ^2/GM) * r^3\)

where T is the period of the planet, M is the mass of the Sun, G is the gravitational constant, and r is the distance of the planet from the Sun.

We can use this formula to calculate the distance of Planet B from the Sun, given that its period is 4.50 Earth years. We'll need to know the mass of the Sun, which is approximately \(1.99 * 10^{30\) kg.

First, we need to find the value of (T^2/r^3) for Planet A:

(T^2/r^3) for Planet A = (31.6 Earth years)^2 / (10.0 AU)^3

(T^2/r^3) for Planet A = 998.56 Earth years^2/AU^3

Now we can use this value to find the distance of Planet B from the Sun:

(T^2/r^3) for Planet B = (4.50 Earth years)^2 / r^3

Since the two planets are orbiting the same star, we can assume that the mass of the Sun is the same for both planets. Therefore, we can set the two expressions for (T^2/r^3) equal to each other:

(T^2/r^3) for Planet A = (T^2/r^3) for Planet B

998.56 Earth years^2/AU^3 = (4.50 Earth years)^2 / r^3

We can now solve for r:

r^3 = (4.50 Earth years)^2 / 998.56 Earth years^2/AU^3

r^3 = 0.020295 AU^3

r = 0.3149 AU

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Answer: The average atomic mass  of naturally occurring silicon  is 28.08

Explanation:

Mass of isotope Si-28 = 27.9769265327

% abundance of isotope Si-28 = 92.2297% = \(\frac{92.2297}{100}\)

Mass of isotope Si-29 = 28.97649472

% abundance of isotope Si-29 = (4.6932)% = \(\frac{4.6832}{100}\)

Mass of isotope Si-30 = 29.97377022

% abundance of isotope Si-30 = (3.0872)% = \(\frac{3.0872}{100}\)

Formula used for average atomic mass of an element :

\(A=\sum[(27.9769265327\times \frac{92.2297}{100})+(28.97649472\times \frac{4.6832}{100})+(29.97377022\times \frac{3.0872}{100})]\)

\(A=28.08\)

Therefore, the average atomic mass  of naturally occurring silicon  is 28.08

Answer:

mook passes between the earth and sun

Answer:

Of, relating to, or derived from living organisms.

Explanation:

The differences in the distribution of solar energy on Earth's surface is due to Earth’s curved shape and tilt on its axis do not allow the sun’s rays to fall evenly on its surface.

The correct option is D.

Solar energy refers to the energy produced by the Sun.

Solar energy is in the form of heat energy, light energy, and ultraviolet radiation.

The shape of the affects the amount of solar energy that reaches any region of the earth. The earth is spherical in shape. Hence, there is an uneven distribution of solar energy from the sun o the Earth. also, the tilt of the earth affects the amount of solar energy that reaches any region of the earth.

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Answer:

70.91 kJ

Explanation:

The amount of energy (in kJ) required to increase the temperature of 255 g of water from 25.2 C to 90.5 C can be calculated using the formula:

Q = m * c * ΔT

Where Q is the amount of energy, m is the mass of the substance, c is the specific heat, and ΔT is the change in temperature.

Substituting the given values:

m = 255 g

c = 4.184 J/g C

ΔT = (90.5 - 25.2) C = 65.3 C

Q = 255 g * 4.184 J/g C * 65.3 C

Q = 70905.564 J

Q = 70.91 kJ (rounded to two decimal places)

Therefore, the amount of energy required to increase the temperature of 255 g of water from 25.2 C to 90.5 C is 70.91 kJ.

Answer:

The brain

Explanation:

With all those instructions the body recqures to respond to it must be so

Hope it helps

The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.

This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

The properties of an alloy are similar to the properties of its components. The elements in an alloy are not combined in fixed proportions is an alloy not considered a compound

Although the physical characteristics of the alloy are intermediate to those of its component metals, the chemical characteristics of each element are unaltered. Physical methods can be used to separate an alloy (separated by melting). A compound is a collection of several components that are connected by chemical connections.

Metal mixes or blends of a metal and another element are known as alloys. A combination of metallic phases or a solid solution of metal elements, known as an alloy, are both possible (a heterogeneous mixture of two or more solutions).

An alloy is a combined, homogenous combination of a metal with other metals or non-metals.

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Answer: Answer is B and C

b: the properties of an alloy are similar to the properties of its components.

c: The elements in an alloy are not combined in fixed propo

Explanation:

Answer:

a. The Zn and HCl both retained their identity.

The density of a substance for which 4.78 x 106 L of the substance has a mass of 1.50 x 107 kg is 3.138 x 10¹².

Density is the mass per unit volume. Density is s a scalar quantity. It is calculated by dividing the mass by volume. It is denoted rho, a Greek letter. It is denoted by a small d.

rho = m / v

rho = density

m = mass

V = volume

The mass is calculated in grams and kilograms. The volume mass and density are interrelated if two entities are given, the third can be calculated.

Given, that the volume of a substance is 4.78 x 10⁶ L

The mass of the substance is 1.50 x 10⁷ kg

So, put the values in the formula

d = m / v

d = 1.50 x 10⁷ / 4.78 x 10⁶

d = 3.138 x 10¹²

Thus, the density of a substance is 3.138 x 10¹².

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Answer:

Green.

Explanation:

Only the particles that hit the nucleus of the atom bounced off.

Even though diffusion is indeed a passive activity, neither any energy is generated by it.

Scientists refer to energy as the ability to work. Western civilization is feasible because people have discovered how to change energy through one type to another and then use it to complete activities. The quantity of electricity, sound, type of energy, nuclear and otherwise atomic energy, light, mechanical heating, precision machinery, gravitational forces, and other examples fall under this category.

The three main types of energy sources are renewable, alternative, and fossil-fueled. Renewable energy is occasionally, but not always, categorized as an alternative. As decaying organisms such as mammals were treated to extreme temperatures and pressures with in earth's crust over thousands of years ago, fossil fuels were created.

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Answer:

To solve this problem, we need to use the concept of stoichiometry and the equation for neutralization reactions. The balanced equation for the neutralization of an acid and a base is: acid + base → salt + water In this case, we know that 200 mL of a 2.0 M acid solution is titrated with 400 mL of a base solution. Let's call the concentration of the base solution "x". To find the concentration of the base solution, we can use the following equation: moles of acid = moles of base The number of moles of acid can be calculated as follows: moles of acid = volume of acid × concentration of acid moles of acid = 0.2 L × 2.0 mol/L moles of acid = 0.4 mol Since the acid and base react in a 1

Answer:

False

Explanation:

Lead sulfate is insoluble in water and sinks in water

(sorry if it's wrong)

The mass of the carbon dioxide is  49.72 g from the calculation done.

The phrase "mole fraction," which is often referred to as "molar fraction" or "amount fraction," is used to describe the proportions of a mixture's components. It is an intangible quantity that expresses the proportion between the moles of a given component and the total moles in the combination.

We know that;

Number of moles of ethanol = 9.2/46 g/mol

= 0.2 moles

Now;

Number of moles of water = 216.0 g/18 g/mol

= 12 moles

Mole fraction of water = Number of water/ Total number of moles

0.9 = 12/12 + 0.2 + x

0.9(12.2 + x) = 12

10.98 + 0.9x = 12

x = 1.13 moles

Now;

Moles = mass/Molar mass

1.13 = x/44

x = 49.72 g

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The electron transition from n = 4 to n = 1 emits radiation of the shortest wavelength in a hydrogen atom.

Energy is either released or absorbed as an electron moves from one shell to another. The formula for calculating the wavelength produced by electron transfer is as follows:

1/λ = R (\(\frac{1}{n_{1} ^{2} } - \frac{1}{n_{2} ^{2} }\))

where,

λ = wavelength of the photon (wavenumber = 1/wavelength)

R = Rydberg's constant (1.0973731568539(55) x 107 m-1)

\(n_{1}\) and \(n_{2}\) are integers where \(n_{2}\) > \(n_{1}\)

Therefore, on putting the respective values of \(n_{1}\) and \(n_{2}\), we can find out that the transition of electron from n = 4 to n = 1 radiates the shortest wavelength in a hydrogen atom.

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Answer:

Explanation:

i) in keeping industrial machine cool

ii) in textile inustries for dying clothes

Answer:

you just think it and you would make it.

Explanation:

its gonna be easy if you just think what would you do for it.☺

A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.

 For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.

The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.

Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

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