Name 2 physical properties that would allow differentiation between copper, lead and iron shot.

Answer:

Explanation:

Convection

Cold air sinks

Hot air rises

Radiation

faster

better

poor

I think

Answer:

Na₃PO₄ + 3HCl —> 3NaCl + H₃PO₄

The coefficients are: 1, 3, 3, 1

Explanation:

_Na₃PO₄ + __HCl —> __NaCl + _H₃PO₄

The above equation can be balance as follow:

Na₃PO₄ + HCl —> NaCl + H₃PO₄

There are 3 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 3 before NaCl as shown below:

Na₃PO₄ + HCl —> 3NaCl + H₃PO₄

There are 3 atoms of Cl on the right side and 1 atom on the left side. It can be balance by writing 3 before HCl as shown below:

Na₃PO₄ + 3HCl —> 3NaCl + H₃PO₄

Now, the equation is balanced.

The coefficients are: 1, 3, 3, 1

Answer:

0.1332 L

Explanation:

The balanced chemical equation is the following:

2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)

According to the equation, 2 moles of water (H₂O) produce 1 mol of hydrogen (H₂). So, the stoichiometric ratio is 1 mol H₂/2 mol H₂O. To calculate how many moles of H₂O we need to produce 3.7 moles of H₂, we multiply the moles by the stoichiometric ratio:

3.7 moles H₂ x 2 mol H₂O/1 mol H₂ = 7.4 moles H₂O

Now, we have to convert the moles of water to liters. For this, we have to consider the molecular weight (MW) of water and its density (let's consider 1.0 g/mL).

MW(H₂O) = (2 x 1 g/mol H) + 16 g/mol = 18 g/mol

7.4 moles H₂O x 18 g/mol = 133.2 g

133.2 g/(1.0 g/ml) = 133.2 mL

133.2 ml x 1 L/1000 ml = 0.1332 L

Therefore, approximately 0.13 liters of water are needed.

Answer:

a) 0.099 L

b) 9.9

Explanation:

Now, given the equation for the decomposition of H2O2;

2H2O2(l) ------> 2H2O(l) + O2(g)

Mass of H2O2;

percent w/v concentration = mass/volume * 100

volume = 10.0-mL

percent w/v concentration = 3.0 percent

mass of  H2O2 = x

3 = x/ 10 * 100

30 = 100x

x = 30/100

x = 0.3 g of H2O2

Number of moles in  0.3 g of H2O2 = mass/ molar mass

Molar mass of H2O2 = 34.0147 g/mol

Number of moles in  0.3 g of H2O2 = 0.3g/34.0147 g/mol

= 0.0088 moles

From the reaction equation;

2 moles of H2O2 yields 1 mole of oxygen

0.0088 moles of H2O2 = 0.0088 * 1/2  = 0.0044 moles of oxygen

If 1 mole of oxygen occupies 22.4 L

0.0044 moles of oxygen occupies 0.0044 *  22.4/1

= 0.099 L

b) initial volume of the H2O2 solution = 10 * 10-3 L

Hence, ratio of the volume of O2 collected to the initial volume of the H2O2 solution = 0.099 L/10 * 10-3 L = 9.9

Answer:

1.)    2H2  +  O2  --->  2H2O

2.)   CH4  +  4Cl2 --->  CCl4  +  4HCl

Explanation:

In order to balance the equation, you have to make sure there are the same amount of each element on both sides.

Ex (#1).  By adding the coefficients infront of H2 and H20, You now have 4 hydrogen's and 2 oxygens on the left side as well as 4 hydrogens and 2 oxygens on the right side.

Sorry if that's confusing, but hope this helps! :)

Answer:

the answer is B.

Explanation:

The heat is created

Answer:

It is either C or D I think

Explanation:

I did the test a week ago but I can not figure out if it was C or D, but it was one of them...Hope it helps!

I think its C I'm not sure though.

Answer:

It forms a water cycle!

Hope it helps!!!

Answer: Do a quick conversion: 1 moles Calcium Chloride = 110.984 gram using the molecular weight calculator and the molar mass of CaCl2.

Explanation:

Answer:

three mole of CaCI2 have a mass of 3•molx110.98•g•mol-1=333•g

When light travels from less dense air to denser glass or water, it slows down. Slowing down of a ray of light changes the direction of the ray of light.

Light that travels in a straight line in one direction is called a ray of light. When a group of light emanates from a source, it is called a beam of light. A beam of light is defined as the path of a photon or a group of photons traveling through a space appearing as a column of light.

There are three types of light rays. They are

Example of a beam is a beam of light with a pass from a laser or laser pointer. A beam of light is made up of particles called photons that carry specific amounts of energy. We cannot measure the length of a beam.

Thus, when light travels from less dense air to denser glass or water, it slows down. Slowing down of a ray of light changes the direction of the ray of light.

Learn more about Ray of light, here:

https://brainly.com/question/13851007

#SPJ2

Answer:

Any process that leads to the dissociation of a neutral atom or molecule into charged particles ions; the state of being ionized.

Explanation:

Answer:

280

Explanation:

total pressure=partial pressure (He)+partial pressure (N2)+partial pressure (H2)

Answer:

552 g of LiNO₃

Explanation:

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

Volume of solution = 2 L

Molarity of LiNO₃ = 4 M

Mass of LiNO₃ =?

Next, we shall determine the number of mole of LiNO₃ in the solution. This can be obtained as follow:

Volume of solution = 2 L

Molarity of LiNO₃ = 4 M

Mole of LiNO₃ =?

Molarity = mole /Volume

4 = mole of LiNO₃ / 2

Cross multiply

Mole of LiNO₃ = 4 × 2

Mole of LiNO₃ = 8 moles

Finally, we shall determine the mass of of LiNO₃ needed to prepare the solution. This is can be obtained as follow:

Mole of LiNO₃ = 8 moles

Molar mass of LiNO₃ = 7 + 14 + (16×3)

= 7 + 14 + 48

= 69 g/mol

Mass of LiNO₃ =?

Mole = mass /Molar mass

8 = Molar mass of LiNO₃ /69

Cross multiply

Molar mass of LiNO₃ = 8 × 69

Molar mass of LiNO₃ = 552 g

Thus, 552 g of LiNO₃ is needed to prepare the solution.

Main sequence star - red giant - white dwarf

In Order

Answer:

10.57

Explanation:

Step 1: Given and required data

Step 2: Write the basic dissociation reaction for NH₃

NH₃(aq) + H₂O(aq) ⇄ NH₄⁺(aq) + OH⁻(aq)

Step 3: Calculate the concentration of OH⁻

We will use the following expression.

[OH⁻] = √(Kb × Cb)

[OH⁻] = √(1.8 × 10⁻⁵ × 0.0075 M) = 3.7 × 10⁻⁴ M

Step 4: Calculate the concentration of H⁺

We will use the water ion product.

Kw = 1.0 × 10⁻¹⁴ = [H⁺] × [OH⁻]

[H⁺] = 1.0 × 10⁻¹⁴/3.7 × 10⁻⁴ = 2.7 × 10⁻¹¹ M

Step 5: Calculate the pH of the solution

We will use the definition of pH.

pH = -log [H⁺] = -log 2.7 × 10⁻¹¹ = 10.57

Answer:

30 ml

Explanation:

Answer:

Explanation:

Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.

Answer:

human blood is slightly basic

Explanation:

If the pH of a solution is less than 7, it is acidic. If the pH is 7, the solution is neutral and if the pH is greater than 7,the solution is basic. So human blood is slightly basic.

Answer:

A

Explanation:

edge2021

Answer:

A.

Explanation:

Edge

Answer:

Figure 2 represents a nonpolar molecule containing polar covalent bonds

Explanation:

The CO2 molecule is linear, formed by 3 atoms and the electronegativity variations are equal, so its dipolar moment will be null, and this molecule will be nonpolar, however, it has polar covalent bonds.

Answer:

  B

Explanation:

Answer:

magnetic force

Explanation:

A magnet is defined as an object that can attract other objects that are made of iron. Magnets also repels or push away other magnets. Every piece of magnets have two poles namely, a south pole and a north pole. When one magnet comes near another magnet, it exerts a magnetic force on the other magnet. This force can be attractive force or repelling force depending upon the poles surface of the magnet that are close to each other.

Like pole repel each other while opposite poles attract each other.

In the context, the rings of magnet are floating in the air because there is a magnetic force that is repelling the like surfaces or the like poles of these magnetic rings.

Answer:

³₂He

Explanation:

From the question given above, the following equation was obtained

²₁H + ²₁H —> ¹₀n + __

Let ᵇₐX be the missing part of the equation. Thus, the equation becomes:

²₁H + ²₁H —> ¹₀n + ᵇₐX

Next, we shall determine b, a, and X. This can be obtained as follow:

2 + 2 = 1 + b

4 = 1 + b

Collect like terms

b = 4 – 1

b = 3

1 + 1 = 0 + a

2 = 0 + a

a = 2

ᵇₐX => ³₂X => ³₂He

Thus the equation is:

²₁H + ²₁H —> ¹₀n + ᵇₐX

²₁H + ²₁H —> ¹₀n + ³₂He

The missing part is ³₂He

solar energy

wind energy

hydro energy

tidal energy

geothermal energy

Answer:

boron compound - known as Borax

Explanation:

Answer:

1.25 *10^2

Explanation:

25*5 = 125

= 1.25 *10^2

Answer:

When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.

Note: The question is not complete. Assumptionshas been made about the temperature.

Explanation:

According to Charles' law of gases, the volume of a given mass of gas is directly proportional to its temperature in Kelvin provided its pressure remains constant.

Mathematically, V1T1 = V2T2

Given that the volume of the helium gas inside the weather balloon is 34.1 L at a temperature of 5 °C;

When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.

Assuming, the temperature outside the shed was 6.5 °C:

V1 = 34.1 L, T1 = 5.°C or 5.0 × 10^-10 °C = 273.1500000005

V2 = ?, T2 = 6.5 °C 6.5 × 10^-10 °C = 273.15000000065

V2 = V1T1/T2

V2 = (34.1 × 273.1500000005) / 273.15000000065

V2 = 34.1 L

Due the very small increase in temperature, the volume of the balloon increases only very slightly that is increase that it is negligible.

answer: white fur works as a camouflage against the white snow, allowing polar bears an advantage when hunting for food and hiding from predators