The temperature of 335 g of water changed from 24.5oC to 26.4oC. How much heat did this sample absorb? C for water = 4.18 J/goC

Answer:

B- Increase

Explanation:

In the event that the temperature is increased, the normal speed and dynamic energy of the gas atoms increment. In the event that the volume is held steady, the sped up the gas particles brings about more incessant and more powerful crashes with the dividers of the compartment, hence expanding the pressing factor

Answer:

Response is below

Explanation:

The different types of mining are underground, surface, placer, and in-situ. Underground mining uses various materials to excavate resources from beneath the surface of the Earth. Surface mining is a category of mining that in which soil and rock overlying the mineral deposit are removed. Placer mining is the mining of stream bed deposits for minerals. In-situ mining is a mining process used to recover minerals such as copper and uranium through boreholes drilled into a deposit.

Answer:

4.90 x 10 24 atoms

Explanation:

the 24 is the exponent for the 10

Answer:

The concentration will be "[tex]1.88\times 10^5 \ ppm[/tex]".

Explanation:

The given values are:

Mass of solute (KNO₃),

= 15.0 grams

Mass of solvent (H₂O),

= 65.0 grams

The concentration will be:

=  [tex]\frac{Mass \ of \ solute}{Mass \ of \ solution}\times 10^6[/tex]

On substituting the values, we get

=  [tex]\frac{15.0}{65.0+15.0}\times 10^6[/tex]

=  [tex]\frac{15.0}{80}\times 10^6[/tex]

=  [tex]0.1875\times 10^6[/tex]

=  [tex]187500 \ ppm[/tex]

or,

=  [tex]1.88\times 10^5 \ ppm[/tex]

Answer:

19.45g of Cu are expect to be produced

Explanation:

Based on the reaction:

2Ni + 3CuCl2 → 3Cu + 2NiCl3

2 moles of Ni react with 3 moles of CuCl2 to produce 3 moles of Cu

To solve this question we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of Cu produced and the mass as follows:

Moles Ni -Molar mass: 58.6934g/mol-

12.00g * (1mol / 58.6934g) = 0.204 moles Ni

Moles CuCl2 -Molar mass: 134.45g/mol-

42.00g * (1mol / 134.45g) = 0.312 moles CuCl2

For a complete reaction of 0.204 moles of Ni are required:

0.204 moles Ni * (3 moles CuCl2 / 2 moles Ni) = 0.306 moles of CuCl2

As there are 0.312 moles, CuCl2 is the excess reactant and Ni is limiting reactant.

Moles Cu:

0.204 moles Ni * (3moles Cu / 2 moles Ni) = 0.306 moles of Cu are produced

Mass Cu:

0.306 moles of Cu * (63.546g / mol) =

Answer:

1/wavelength

c=1/alpha

Answer:

[tex]\boxed {\boxed {\sf a= \frac {2}{5} \ or \ 0.4 \ m/s^2}}[/tex]

Explanation:

Acceleration is found by dividing the change in velocity by the time. The formula is:

[tex]a= \frac {v_f-v_i}{t}[/tex]

where [tex]v_f[/tex] is the final velocity, [tex]v_i[/tex] is the initial or starting velocity, and [tex]t[/tex] is the time.

Her velocity changes from 2 meters per second to 4 meters per second in the 5 seconds. Therefore:

[tex]v_f= 4 \ m/s \\v_i= 2 \ m/s \\t=5 \ s[/tex]

Substitute the values into the formula.

[tex]a= \frac { 4 \ m/s- 2 \ m/s}{5 \ s}[/tex]

Solve the numerator and subtract.

[tex]a= \frac { 2 \ m/s}{5 \ s}[/tex]

Divide.

[tex]a= \frac{2}{5} \ m/s/s= \frac{2}{5} \ m/s^2[/tex]

This can also be written as a decimal.

[tex]a=0.4 \ m/s^2[/tex]

Her average acceleration during the last 5 seconds of the race is 2/5 or 0.4 meters per square second.

Answer:

Here

Initial velocity = 2 m/s

Final velocity = 4 m/s

Time = 5 sec

v = u + at

4 = 2 + a(5)

4 - 2 = a(5)

2 = 5a

2/5 = a

Hence, acceleration is 2/5 m/s²

Answer:

[tex]N_{2}O_{5}[/tex]

Explanation:

usually, the first step is to calculate the moles but since that is already given in the question we can move onto the next step

least molar ratio:

N = [tex]\frac{1}{1}[/tex] = 1

O = [tex]\frac{2.5}{1}[/tex] = 2.5

when the answer is in decimals we will multiply it by an integer in order to make it a whole number (in this case 2)

O = 2.5(2) = 5

in order to balance, we will also multiply the atoms of N by the same integer

N = 1(2) = 2

thus, the empirical formula is [tex]N_{2}O_{5}[/tex]

Answer:

the same is what is this question like what did u exame

Explanation:

You will have to rewrite this in your own words please. Download the app Paraphrase and also download Plagiarism Checker. Go on Paraphrase first and write it out then go to Plagiarism second and it'll tell you if you still need to reword it.

Answer:

A nuclear reactor produces electricity in much the same way other power plants do. The chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity.

Explanation:

Nuclear energy originates from the splitting of uranium atoms a process called fission. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel. The uranium fuel is formed into ceramic pellets. Inside each uranium fuel pellet, there are millions of uranium nuclei. When these nuclei are split, a huge amount of energy is released. Some of this energy is from radiation, but the biggest source is kinetic energy. This is the energy that produces heat inside a reactor. The heat produced during nuclear fission in the reactor core is used to boil water into steam, which turns the blades of a steam turbine. As the turbine blades turn, they drive generators that make electricity. Nuclear plants cool the steam back into water in a separate structure at the power plant called a cooling tower, or they use water from ponds, rivers, or the ocean. The cooled water is then reused to produce steam.

Answer:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

The coefficients are: 1, 6, 3, 2

Explanation:

__Fe₂(SO₄)₃ + __KOH —> __K₂SO₄ + __Fe(OH)₃

To determine the correct coefficients, we shall balance the equation. This can be obtained as follow:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + Fe(OH)₃

There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 2 before Fe(OH)₃ as shown below:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of OH on the right side and 1 atom on the left side. It can be balance by writing 6 before KOH as shown below:

Fe₂(SO₄)₃ + 6KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of K on the left side and 2 atoms on the right side. It can be balance by writing 3 before K₂SO₄ as shown below:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

Now, the equation is balanced.

Therefore, the coefficients are: 1, 6, 3, 2

Answer: Beta decay occurs when a nucleus is unstable because it has too many or too few neutrons relative to protons. The nucleus emits a beta particle and energy.  In beta-minus decay, a neutron breaks down to a proton and an electron, and the electron is emitted from the nucleus.

Explanation:

Answer:

it will a i did the quiz got it all right

Explanation:

Answer:

They all end up in the oceon

Explanation:

Answer:

ok

Explanation:

i think they will all end up in ocean

Answer:

i believe it's D

Explanation:

Answer:

D

Explanation:

Answer:

what they have in common is consist of electrons, protons, and neutrons.

Explanation:

Answer:

B

Explanation:

Answer:

F

T

F

T

Explanation:

i hope these are right

We want to solve Q = mcΔT for the liquid water; its change in temperature will tell us the amount of thermal energy that flowed out of the reaction. The specific heat, c, of water is 4.184 J/g °C.

Q = (72.0 g)(4.184 J/g °C)(100 °C - 25 °C) = 22593.6 J

Q ≈ 2.26 × 10⁴ J or 22.6 kJ (three significant figures).

Answer:

116.88g of table salt (NaCl) contains two formula units

Explanation:

Now,

We know that 1 formula unit of sodium chloride has a molar mass of 58.44g/mol

Hence;

Mass of 1 formula unit = 58.44g

Mass of x formula units = 116.88g

x = 116.88g * 1 formula unit/58.44g

x = 2 formula units

Therefore;

116.88g of table salt (NaCl) contains two formula units

Answer:

There are  1.2044 × 10²⁴ formula units of NaCl in 116.88 g of table salt (NaCl)

Explanation:

A formula unit is an empirical formula of the smallest collection or number of atoms in an ionic or covalent combination from which a compounds formula can be established and which are used to represent the compound stoichiometrically

Sodium chloride is an ionic compound and is represented by the formula unit NaCl as it composed of ions and is not therefoe represented by a molecular formula

The given mass of the table salt, NaCl = 116.88 g

The molar mass of NaCl = 58.44 g/mol = The mass of 1 mole of NaCl

1 mole of NaCl contains one Avogadro's number or 6.022 × 10²³ formula units of NaCl,

∴ 58.44 g of NaCl contains 6.022 × 10²³ formula units of NaCl

116.88 g of NaCl will have (116.88/58.44) × 6.022 × 10²³ = 1.2044 × 10²⁴ formula units of NaCl

The number of formula units of NaCl in 116.88 g of table salt (NaCl) =  1.2044 × 10²⁴ formula units of NaCl.

Answer:

4.5M

Explanation:

Here is why:

Answer:

Newton's second law of motion

F = ma

A pH meter will make short work of identifying the pH of your solution. These meters have a glass probe that measures a solution's ion concentration. To use a pH meter, place a small portion of your solution in a beaker or test tube, rinse the probe of the pH meter, and then place the probe into your solution.

Source:

https://sciencing.com/identify-solution-neutral-base-acidic-8346.html

pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7. pH meter is the only instrument to measure the pH of an unknown solution.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution.

pH meter is used to measure the pH of an unknown solution. A glass probe is attached to pH meters, that measure the concentration of hydrogen ion in unknown solution. Take the unknown solution in the beaker and then put the washed, clean glass probe in the solution. Now wait for a second to take the reading.

Therefore, pH meter is the only instrument to measure the pH of the solution.

To learn more about pH, here:

https://brainly.com/question/27945512

#SPJ2

Nitrogen transmutes to form an isotope of oxygen. The superscript for oxygen is 17

The subscript for hydrogen is 1

Cobalt-59 accepts a neutron to form a new isotope. The subscript for cobalt is 27

Answer:

Oxygen = 17

Hydrogen = 1

Cobalt = 27

Explanation:

Answer:

red dwarf

Explanation:

Answer:

D

Explanation:

Answer:

3rd law

Explanation:

when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Answer:

The empirical formula of the hydrocarbon is C₂H₅

Explanation:

The formula for the hydrocarbon is [tex]C_xH_y[/tex]

The mass of CO₂ produced per 1,000 g of H₂O = 1,955 g

The equation for the chemical reaction is given as follows;

[tex]C_xH_y[/tex] + (x + y/4) O₂ → XCO₂ + y/2H₂O

From the given chemical equation, counting the number of atoms on both sides of the equation, we have;

The molar mass of CO₂ = 44.01 g/mol

The molar mass of H₂O = 18.01528 g/mol

The number of moles of H₂O in 1,000 g of H₂O = 1,000 g/(18.01528 g/mol) = 55.5084351 moles

The number of moles of CO₂ in 1,955 g of H₂O = 1,955 g/(44.01 g/mol) = 44.4217223 moles

Therefore, given that X moles of CO₂ is produced alongside Y/2 moles of H₂O. we have;

X = 44.4217223, Y/2 = 55.5084351

∴ Y = 2 × 55.5084351 = 111.0168702

The ratio of X to Y = X/Y = 44.4217223/111.0168702 = 0.40013488238

∴ The ratio of X to Y = X/Y ≈ 0.4 = 4/10

X/Y ≈ 4/10

The empirical formula is the representation of molecular formula in the smallest whole number ratio of the elements of the molecules

Therefore, when X = 4, Y = 10, from which we have the smallest ratio as;

When X = 2, Y = 5

The empirical formula of the hydrocarbon is therefore, [tex]C_xH_y[/tex] = C₂H₅

The given chemical equation becomes;

C₂H₅ + (2 + 5/4) O₂ → 2CO₂ + 5/2H₂O

C₂H₅ + 3.25 O₂ → 2CO₂ + 2.5 H₂O

We then have;

4C₂H₅ + 13 O₂ → 8CO₂ + 10 H₂O

The empirical formula of the hydrocarbon, [tex]C_xH_y[/tex] = C₂H₅.