Name the alkyne please help!!

Answer:

Formation of precipitate

Formation of soluble salts

Explanation:

Let's consider the molecular equation that takes place when an aqueous solution of cesium sulfate is mixed with an aqueous solution strontium perchlorate.

Cs₂SO₄(aq) + Sr(ClO₄)₂(aq) ⇒ 2 CsClO₄(aq) + SrSO₄(s)

According to the solubility rules:

For a double displacement reaction to occur, at least one of the products must be insoluble or volatile.

Answer:

It's b) Formation of a precipitate

Explanation:

I took the quiz and got it right.

What pH scale number represents a neutral.

The answer is 7

Answer: The answer is decomposition reaction

Explanation: Hope this helps:)

Answer: D. decomposition reaction

Explanation:

Answer:B. 0.05 mol/dm3

Explanation:

The hydrogen ion concentration in the solution is 2 mol/dm³

The correct answer to the question is Option D. 2 mol/dm³

We'll begin by calculating the molarity of the solution.

Volume = 25 cm³ = 25 / 1000 = 0.025 dm3

Mole of H₂SO₄ = 0.025 mol

Molarity = mole / Volume

Molarity of H₂SO₄ = 0.025 / 0.025

H₂SO₄(aq) —> 2H⁺(aq) + SO₄²¯(aq)

From the balanced equation above,

1 mole of H₂SO₄ contains 2 moles of H⁺.

Therefore,

1 mol/dm³ H₂SO₄ will also contain 2 mol/dm³ H⁺.

Thus, the concentration of Hydrogen ion in the solution is 2 mol/dm³

The correct answer to the question is Option D. 2 mol/dm³

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Answer:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

So answer B.

Explanation:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The balanced reaction is

NaOH + HCl = NaCl + H2O

To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH  is required.

mass of  NaOH =Mole× Molar mass of NaOH

mass of NaOH=3.612× 40 g/mol

mass of NaOH=144.48g

Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

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Answer:

The molecular weight is [tex]Z = 111.2 \ g/mol[/tex]

Explanation:

From the question we are told that

   The mass of the sample is  [tex]m = 0.98 \ g[/tex]

    The temperature is  [tex]T = 348 K[/tex]

    The volume which the gas occupied is  [tex]V = 265 \ ml = 265 *10^{-3} L[/tex]

     The pressure is  [tex]P = 0.95 \ atm[/tex]

Generally from the ideal gas equation we have that

       [tex]PV = n RT[/tex]

Here n is the number of moles of the gas while the R is the gas constant with value  [tex]R = 0.0821 \ atm \cdot L \cdot mol^{-1} \cdot K^{-1}[/tex]

        [tex]n = \frac{PV}{ RT}[/tex]

=>      [tex]n = \frac{ 0.95 * 265 *10^{-3} }{ 0.0821 * 348}[/tex]

=>      [tex]n = 0.00881 \ mol[/tex]

Generally the molecular weight is mathematically represented as

          [tex]Z = \frac{m}{n}[/tex]

=>      [tex]Z = \frac{0.98 }{0.00881}[/tex]

=>      [tex]Z = 111.2 \ g/mol[/tex]

Answer:

Mass = 32 g

Explanation:

Given data:

Number of moles of oxygen = 1.0 mol

Mass of oxygen = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of oxygen (O₂) is  32 g/mol

by putting values,

1.0 mol = mass/ 32 g/mol

Mass = 1.0 mol ×32 g/mol

Mass = 32 g

Nucleus is present at the centre of atom. It contains protons and neutrons. It is very small as compared to the atom.

Answer:

It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.

Explanation:

It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.  

Answer:

Of oxygen would be 6 moles (4).

Explanation:

Since it is in a bracket you have to multiply 3 and tge 2 to get 6 oxygens.

Answer:

Gallium, Germanium, Arsenic, Selenium, Bromine and Krypton

Explanation:

Based on periodic trends, the atom that has a larger ionization energy than calcium are Gallium, Germanium, Arsenic, Selenium, Bromine and Krypton.

Across the period, the ionization energy increases from left to right.

Answer: H2O and NH3 are polar molecules. H2 is a nonpolar molecule but the H-H bond is also nonpolar.

Therefore, the best choice is CCl4. Although the C-Cl bond is polar due to electronegativity differences, the molecule itself is nonpolar because the net dipole moments cancel out, given its tetrahedral molecular structure.

Explanation:

Answer:

Chemical processes have no effect on the nucleus otherwise we would be in deep truble. GOOD LESSONS ♡

The empirical formula of vitamin A : C₂₀H₃₀O

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

mol ratio of C : H : O ⇒

[tex]\tt \dfrac{83.85}{12}\div \dfrac{10.56}{1}\div \dfrac{5.58}{16}\\\\6.9875\div 10.56\div 0.34875\rightarrow divide~by~smallest(0.34875)\\\\20\div 30\div 1[/tex]

Answer:

a. Kw = 1.0 × 10⁻¹⁴

Explanation:

a. Let's consider the self-ionization of water.

2 H₂O(l) ⇄ H₃O⁺(aq) + OH⁻

The ion-product of water (Kw) at 25 °C is:

Kw = [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴

c. Considering [H⁺] = [H₃O⁺] = 4.0 × 10⁻⁹ M, the concentration of OH⁻ is:

[OH⁻] = 1.0 × 10⁻¹⁴/[H₃O⁺] = 2.5 × 10⁻⁶ M

b. We can calculate the pOH using the following expression.

pOH = -log [OH⁻] = -log 2.5 × 10⁻⁶ = 5.6

d. We can calculate the pH using the following expression.

pH = -log [H⁺] = -log 4.0 × 10⁻⁹ = 8.4

When [H+] = 4.0 × 10–9 M in water at 25°C, then the [tex]Kw =1.0\times 10^-^1^4.[/tex]

Kw is the dissociation constant or ionization constant of water.

The self-ionization of water will be

[tex]\rm 2 H_2O(l) = H_3O^+(aq) + OH^-[/tex]

The dissociation constant of the water at 25°C will be

[tex]\rm Kw = [H_3O^+][OH^-] = 1.0 \times 10^-^1^4[/tex]

Thus, the correct option is a. [tex]Kw =1.0\times 10^-^1^4.[/tex]

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The coefficients used to balance the chemical equation given in the question are 2, 4, 1 (Option A)

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Ag₂O —> Ag + O₂

There are 2 atoms of O on the right side 1 on the left. It can be balance by writing 2 before Ag₂O as shown below

2Ag₂O —> Ag + O₂

There are 4 atoms of Ag on the left side and 1 atom on the right side. It can be balance by writing 4 before Ag as shown below

2Ag₂O —> 4Ag + O₂

Now, the equation is balanced.

Thus, the coefficients are: 2, 4, 1

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Answer:

Explanation:

I hope this helps xD

Answer:

Electrical energy is used to power up a light bulb. The current moves from the outlet to the light bulb through the wire.

Lightning is another example of electrical energy. The negatively charged particles are separated from the positively...

Batteries are also sources of electrical energy. In car batteries, the moving charges Explanation:

fI gave u 3 think of the 4th one

Answer:

CO2

Explanation:

Answer:

the type is single replacement

The given reaction equation represents a single-replacement reaction.

Explanation:

                   ABC→ A+B+C

                   A+B+C → ABC

                   AB+ C → AC + B

                  AB+ CD → AC + BD

Given:

[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]

To find:

The type of chemical reaction represented by the given equation.

Solution:

In the given reaction:

[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]

Iron is replacing copper from its compound which is copper(II) chloride to give iron(II) chloride and copper as a product.

So from this, we can conclude that the given reaction equation represents a single-replacement reaction.

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Answer:

2984.52J

Explanation:

Using the formula: Q = m × c × ∆T

Where;

Q = amount of heat (in Joules)

m = mass (in grams)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

Based on the information provided in the question;

m = 34.0g

c = 4.18 J/gºC.

Initial temperature = 55.0°C

Final temperature = 76.0°C

Hence, Q = m × c × ∆T

Q = 34 × 4.18 × (76 - 55)

Q = 142.12 × 21

Q = 2984.52J

Therefore, 2984.52J is the amount of heat, in Joules, needed to raise 34.0g of the water.

Answer:

W is tungsten on the periodic table

Answer:

1) 4*10^5

2) 3.6*10^5

3) 3.55*10^5

4) 3.550*10^5

5) 3.55000*10^5

Explanation:

1) 4 x [tex]10^5[/tex]

2) 3.6 x [tex]10^5[/tex]

3) 3.55 x [tex]10^5[/tex]

4) 3.550 x [tex]10^5[/tex]

5) 3.55000 x [tex]10^5[/tex]

A number is written in scientific notation when there is a number greater than or equal to 1 1 11 but less than 10 10 1010 multiplied by a power of 10 10.

Significant figures are the number of digits in a value, often a measurement, that contributes to the degree of accuracy of the value.

1) 4 x [tex]10^5[/tex]

2) 3.6 x [tex]10^5[/tex]

3) 3.55 x [tex]10^5[/tex]

4) 3.550 x [tex]10^5[/tex]

5) 3.55000 x [tex]10^5[/tex]

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Answer:c. oxygen,light,and glucose combine to produce high energy molecules

Explanation:

Answer:

i think the answer is b

Explanation:

Answer:

57.124.18 Pascals

Explanation:

The pressure that each person exerts on the ground is given by:

Pressure = force/area

The force that each person exert is given by:

Force = mass (kg) x acceleration due to gravity (10 m/s2)

1 lb = 0.4536 kg, hence;

250 lb person = 113.398 kg

120 lb person = 54.431 kg

Force exerted by the 250 lb person = 113.398 x 10 = 1133.98 kg/m2

Force exerted by 120 lb person = 54.431 x 10 = 544.31 kg/m2

16 inch2 = 0.0103226 m2

Pressure exterted by 250 lb person = 1133.98/0.0103226

                           = 109,854.11 pascals

Pressure exerted by 120 lb person = 544.31/0.0103226

                           = 52,729.93 Pascals

Difference in pressure = 109,854.11 - 52,729.93

                               = 57,124.18 Pascals

Hence, a 250 lb person will exert 57.124.18 Pascals pressure more than a person of 120 lb on a foot with a 16 inch2 area.

Answer:

A. The seeds on the ground are going to grow into new trees.

Explanation:

Trees are renewable resources.

Answer:

15.26 g of tin

Explanation:

Given that the equation of the process is;

Sn^2+(aq) + 2e ------> Sn(s)

Since 1e = 1F= 96500 C

but q =It

t is in hours so it must be converted to seconds, the SI unit of time

Hence;

119g of tin is deposited by 2 * 96500 C

xg of tin is deposited by 5.29 * 1.30 * 60 * 60

x = 119 * 5.29 * 1.30 * 60 * 60/ 2 * 96500

x = 2946106.8/193000

x= 15.26 g of tin

A current of 5.29 A is passed through a Sn(NO₃)₂ solution for 1.30 hour, the amount of tin plated is 15.26 grams.

Mass of any deposited susbatnce that is obtained by the passing of current will be calculated by using the Faraday's Law as:

W = ECT/F, where

W = required mass of deposited tin

C = current = 5.29 A

T = time period = 1.30hr = 4,680sec

F = faradays constant = 96500C

E = equivalent mass

Equivalent mass will be calculated as:

E = molar mass/charge on atom = 119/2 = 59.5 g/equ

On putting all these values in the above equation, we get

W = (59.5)(5.29)(4680) / 96500

W = 15.26 g

Hence mass of tin is 15.26 g.

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Answer:

They contain oxygen

hope it helps