Can some one help me ASAP with the 3rd and 4th answer please! This is due at 7:30 in the morning

Answer:

e = 1.60x10⁶J

Explanation:

It is possible to find the energy from the wavelength of the radiation as follows:

e = c*h / λ

Where e is energy in joules

c is light velocity (3.0x10⁸m/s)

h is Planck's constant (6.626x10⁻³⁴Js)

And λ is wavelength in meters (1.24x10⁻³¹m)

e = 3.0x10⁸m/s*6.626x10⁻³⁴Js / 1.24x10⁻³¹m

Answer:

phosphatase

Explanation:

Answer:

- Amount of energy = -1066.92 J

- Yes, a phase change occurs from gaseous state to liquid state

- It is exothermic

Explanation:

Using Q = m × c × ∆T

Where Q = amount of energy

m = mass = 17g

c = specific heat capacity of water (4.184J/g°C)

∆T = change in temperature (87°C - 102°C = -15°C)

Hence, Q = m × c × ∆T

Q = 17 × 4.184 × (-15°C)

Q = -1066.92 J

- According to this question, vapor condenses i.e. gaseous form of water changes to liquid water, which involves a reduction in temperature. Hence, a change of phase occurs from gaseous state to liquid state.

- Since the change of phase occurs from a less orderly state (gas) to a more orderly state (liquid), there is a release of energy i.e. EXOTHERMIC. The amount of energy or Enthalpy change (∆H) is negative

Answer:

1) Zn is a element

2)CuSO4 is an ionic compound

Explanation:

Answer: an element and an ionic compound

Explanation: my mom told me

Answer:

The net reaction is Zn(s) + 2H +(aq) → Zn2+(aq) +H 2(g) The Cl− ions are spectators - they don't change. This experiment includes the reaction of zinc with hydrochloric acid.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.

Answer:

D. 5 frogs/sq meter

Explanation:

Explanation:

HCL is a binary compound consiting of two atom a Hydrogen and a chlorine atom both of these and non-metallic atom and so will from a covalent bond between them

Answer:

25 miles per second to X miles per hour

Formula = for an approximate result, multiply the speed value by 2.23

25 m/s x 2.23 ≈ 55.92 mph

Answer:

273 K, 101.3 kPa

Explanation:

the standard pressure he can use is 101.3 kPa and standard temperature= 273 K

1. The molar mass of the unknown gas obtained is 0.096 g/mol

2. The pressure of the oxygen gas in the tank is 1.524 atm

This states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e

R ∝ 1/ √M

R₁/R₂ = √(M₂/M₁)

R₁/R₂ = √(M₂/M₁)

11.1 / 2.42 = √(2.02 / M₁)

Square both side

(11.1 / 2.42)² = 2.02 / M₁

Cross multiply

(11.1 / 2.42)² × M₁ = 2.02

Divide both side by (11.1 / 2.42)²

M₁ = 2.02 / (11.1 / 2.42)²

M₁ = 0.096 g/mol

From the question given above, the following data were obtained:

The pressure of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both side by V

P = nRT / V

P = (27.65625 × 0.0821 × 294) / 438

P = 1.524 atm

Learn more about Graham's law of diffusion:

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Answer:

79

Explanation:

This is the answer I نخل جکڑ disparity disguising

Answer:

When atoms are formed or broken.

Explanation:

The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Answer:

B. Decomposition reaction

Explanation:

When silver chloride is kept in the sun, it decomposes to form chlorine gas and silver. As the reaction proceeds, the white coloured silver chloride turns grey because of the formation of silver. Chlorine produced in the reaction escapes into the environment as it is produced in the gaseous state.

2AgCl(s) + light → 2Ag(s) + Cl²(g)

As the above reaction is sensitive to light, they are used in black and white photograph.

Answer:

1 week = 272 minutes

36 weeks = 272*36

                = 9792 minutes

Answer:

The answer is "Ammonium nitrate is the reactant of this chemical reaction".

Explanation:

The Ammonium nitrate (NH4NO3)  is an ammonium and nitrate ionic crystalline solid. In water and hygroscopic as a strong, it's also highly soluble, although it does not form hydrates.

It uses as a nutrient for generating medications as well as leaven fertilizers and explosive materials. Nitrate in ammonium is sodium bicarbonate ammonium chloride. It is incendiary, an oxidizing agent, and a fertilizer.

Answer: For disadvantages, 1,2, and 3.

Answer:

We can use the dilution formula to find the volume of the diluted solution to be prepared

c1v1 = c2v2

Where c1 is concentration and v1 is volume of the concentrated solution

And c2 is concentration and v2 is volume of the diluted solution to be prepared

Substituting the values in the equation

15 M x 25 mL = 3 M x v2

v2 = 125 mL

The 25 mL concentrated solution should be diluted with distilled water upto 125 mL to make a 3 M solution

Answer:

a.) It matches the universal pH indicator and is indicating the proper pH.

Explanation:

it says its the answer.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.

Answer:

Your Answer would be Option B

Answer:

B

Explanation:

The Answer is B-Transfer of heat through direct physical contact

Answer:

The purpose of a lab report is to organize and communicate what you did in your experiment.

Explanation:

Answer:

Compound microscopes are used to view small samples that can not be identified with the naked eye.

Explanation:

These samples are typically placed on a slide under the microscope. When using a stereo microscope, there is more room under the microscope for larger samples such as rocks or flowers and slides are not required.

Hope this helps :)

The original volume is equal to 248.6 mL.

To find the value of pressure, volume or temperature of a gas after a transformation, one must use the general gas law:

                                                [tex]\frac{P_1 V_1}{T_1} =\frac{P_2 V_2}{T_2}[/tex]

Thus, as the pressure does not change, it is enough to substitute the values ​​in the above formula, such that:

                                               [tex]\frac{V_1}{20}=\frac{373}{30} \\ V_1 = 248.6mL[/tex]

So, the original volume is equal to 248.6 mL.

Learn more about gas law in: brainly.com/question/1190311

The mass given in the periodic table is a weighted average of all isotopes of an element. For example Hydrogen is normally just one proton so one would expect its atomic mass to be exactly 1, but there are other naturally occurring isotopes of H (deuterium with a mass of 2 and tritium with a mass of 3)  that have more neutrons resulting in a weighted average slightly greater than 1.

The mass of the atoms is given by the number of neutrons and protons. The mass of the atom and the average mass of the element looks a little different due to mass defect.

The mass defect has been the difference in the mass and the average mass of the elemental atom. It has been the energy that binds the neutrons and the protons together in the nucleus. The mass and the average atomic mass differ slightly.

The mass of an individual atom differs from the average atomic mass as average atomic mass is the sum of the masses of the isotope of the elements. Isotopes have little difference in masses due to the number of neutrons. For example mass and average atomic mass of hydrogen differs.

Therefore, the mass and the average atomic mass differ.

Learn more about the mass defects, here:

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Answer:

I need more information

Explanation:

Answer:

B. Protons weigh less than neutrons.

Explanation:

Option 1: Wrong

The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom.

Option 2: Correct

Neutron's second down quark is heavier than the proton's second up quark. So the greater mass of this down quark gives the neutron a greater mass than the proton.

Option 3: Wrong

The proton and neutron have similar, but not identical masses. Either of these particles has a mass approximately 2000 times greater than the mass of an electron. ... The electrons make the greatest contribution to the chemical properties of the atom.

Option 4: Wrong

A neutron is made up of 2 down quarks and 1 up quark, bound together by 3 gluons. A proton is made up of 1 up quark and 2 down quarks, again, bound together by 3 gluons. The up quark is the lightest quark, and any other type is heavier. Both hadrons have 3 gluons, an up and a down quark in common. The only particles left are an up quark from the proton and a down quark from the neutron. Since any other quark is heavier than an up quark, the down quark is heavier. And same+lighter<same+heavier.

A proton and a neutron have a mass approximately 2000 times (x1836) of an electron each.

Answer:

hyprogenic

Explanation:

hope it's help

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