Plz help!!!!!!!!!!!!!

Answer:

150 gs for me aww thanks

Explanation:

Answer:

D) The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Explanation:

Edg

The reaction Mg + Cl2 → MgCl2 is a synthesis reaction. Option B

We kno0w that in a chemical reaction there is the combination of two or more substances so as to get the product of the reaction. In this case there is the combination of the magnesium and the chlorine and the product is the magnesium chloride.

In the reaction, we have two substances that have been mixed together and then we have a single product that have been formed from the two. The formation of one product means that it is a synthesis reaction.

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Answer:

Yes, it's a hexagon, specifically a non-convex hexagon on account of having a concave angle. There's no specific official name that I'm aware of. "L-shaped hexagon" might actually be sufficient.

Explanation:

One answer is a right-angled concave hexagon, but you do need to cite some context. – Andrew Leach♦ Sep 8 '15 at 9:53. Well... since the Greek letters "gamma" and "lambda" are shaped roughly like the letter "L," you might call it "gammoid" or "lambdoid." I just invented these words.

Answer:

false; one could be in thin shape but thay doesnt always mean they are healthy, or fit...there is always a chance there can be malnutrition or they have a good metabolism, but to be in shape, there should be a good balance of fat and muscle in the body

Answer:

False

Explanation:

Answer:

CO2

Explanation:

took the test

Answer:

Co2

Explanation:

Answer:

Oxygen is a reactant of cellular respiration, while being the product for photosynthesis

Explanation:

Photosynthesis

carbon + water + sunlight -> oxygen and glucose

Cellular respiration

oxygen + glucose -> carbon + water + ATP

Answer:

Diphosphorus tetraiodide

Explanation:

Diphosphorus tetraiodide is an orange crystalline solid with the formula P2I4. It has been used as a reducing agent in organic chemistry. It is a rare example of a compound with phosphorus in the +2 oxidation state, and can be classified as a subhalide of phosphorus.

Can I please have brainliest?

The name of the molecular compound with the formula [tex]\rm P_2I_4[/tex] is diphosphorus tetraiodide.

The term "compound" refers to two or more elements joined together such that the elements have lost their individual identity in favor of a new set of properties.

The given molecular compound  [tex]\rm P_2I_4[/tex] is diphosphorus tetraiodide.

Therefore, diphosphorus tetraiodide is the name of the molecular compound with the formula  [tex]\rm P_2I_4[/tex] .

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Answer:

d = 8.96 g/cm³

Explanation:

Given data:

Volume of sample = 10.0 cm³

Mass of copper = 89.6 g

Density of copper = ?

Solution:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

d = 89.6 g/ 10.0 cm³

d = 8.96 g/cm³

Answer:

6moles of water

Explanation:

Given parameters:

Number of moles of oxygen  = 3moles

  Reaction equation:

      2H₂   +   O₂   →   2H₂O

Unknown:

Number of moles of water formed  = ?

Solution:

To solve this problem;

      compare the number of moles in the reaction.

        1 mole of oxygen gas will produce 2 mole of water

        3 moles of oxygen gas will produce 3 x 2  = 6moles of water.

Metal acts as a catalyst in catalytic converters

Answer:

[tex]-121.56\ \text{J}[/tex]

Explanation:

[tex]V_1[/tex] = Initial volume = 0.2 L

[tex]V_2[/tex] = Final volume = 0.6 L

P = Pressure = 3 atm

[tex]W=-P\Delta V\\\Rightarrow W=-3(V_2-V_1)\\\Rightarrow W=-3(0.6-0.2)\\\Rightarrow W=-1.2\ \text{L atm}[/tex]

[tex]1\ \text{L atm}=101.3\ \text{J}\\\Rightarrow -1.2\ \text{L atm}=-1.2\times 101.3\ \text{J}=-121.56\ \text{J}[/tex]

Work done is [tex]-121.56\ \text{J}[/tex].

Limiting reactant : N₂

Excess reactant : H₂

amount of NH₃ : 8 molecules

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

[tex]\tt N_2+3H_2\rightarrow 2NH_3[/tex]

limiting reactant = smaller mol ratio

[tex]\tt \dfrac{4}{1}=4[/tex]

[tex]\tt \dfrac{15}{3}=5[/tex]

limiting reactant ⇒ N₂

The number of reacted H₂ molecules :

[tex]\tt \dfrac{3}{1}\times 4=12[/tex]

The remaining H₂ after the reaction :

[tex]\tt 15-12=3~molecules[/tex]

Amount of NH₃ :

[tex]\tt \dfrac{2}{1}\times 4=8~molecules[/tex]

Answer:

0.45 g

Explanation:

Answer:

71.7 g of C₆H₅Br are produced at the theoretical yield.

Explanation:

The reaction is:

C₆H₆ + B₂ → C₆H₅Br + HBr

This is an easy excersie, stoichiometry is 1:1

We determine moles of reactants:

42.1 g / 78g/mol = 0.540 moles of benzene

73 g / 159.80 g/mol = 0.457 moles of hydrogen bromide

Certainly, the HBr is the limiting reactant, because I need 0.540 moles of HBr for 0.540 moles of benzene and I only have, 0.457 moles.

0.457 moles of HBr will produce 0.457 of bromobenzene, at the 100 % yield reaction (theoretical yield)

We convert the moles to mass: 0.457 g . 157 g/mol = 71.7 g  

The theoretical yield of the reaction has been 0.457 mol.

The balanced chemical equation for the reaction can be given by:

[tex]\rm C_6H_6\;+\;Br_2\;\rightarrow\;C_6H_5Br\;+\;HBr[/tex]

Accordingly, 1 mole of benzene will give 1 mole of Bromobenzene and 1 mole of Hydrobromide.

The moles can be calculated as;

Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]

Moles in 42.1 grams Benzene:

Moles of Benzene = [tex]\rm \dfrac{42.1}{78}[/tex]

Moles of Benzene = 0.540 mol

Moles of Bromine = [tex]\rm \dfrac{73}{159.80}[/tex]

Moles of Bromine = 0.457 mol.

The limiting reactant in the reaction has been the one that has been present in the lesser quantity as the other reactant to continue to the product formation.

The 1 mole of Benzene requires 1 mole of bromine. So, 0.54 mol of benzene requires. 0.54 mol of bromine. Since the available bromine has been 0.457 mol, Bromine has been the limiting reactant.

The theoretical yield of the reaction will be based on the concentration of Bromine.

Thus, 1 mol of Bromine forms 1 mol of Bromobenzene.

0.457 mol of Bromine will form 0.457 mol of bromobenzene.

The theoretical yield of the reaction has been 0.457 mol.

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Answer:

I think it is D

Explanation:

If you pull the box your weight is doing the work not your strength.

Answer:

b. Van der Waals

Explanation:

Non-bonding intermolecular interaction is simply the same as intermolecular forces between molecules.

One such example from the given choice is the van der waals forces.

All the elements such as carbon, oxygen, and hydrogen found in ethanol but when they are seperated from ethanol they have totally different compound. They are pure element and ethanol is a mixture.

Ethanol is a colourless liquid which catches fire easily and it is produced by the process of natural fermentation of sugars or alcohol.

The chemical formula of ethanol is C2H5OH, molar mass is 46.07 g/mol and its boiling point is 78.37 °C with density 789 kg/m cube.

Ethanol is also known as alcohol which is colourless and slightly toxic chemical compound and ethanol forms water as well as carbon dioxide.Ethanol is a colourless liquid which catches fire easily and it is produced by the process of natural fermentation of sugars or alcohol.

Therefore, All the elements such as carbon, oxygen, and hydrogen found in ethanol but when they are seperated from ethanol they have totally different compound. They are pure element and ethanol is a mixture.

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Answer:

A chemical element exhibiting the symbol F and atomic number 9 is fluorine. It prevails as an extremely toxic pale yellow diatomic gas at normal circumstances and is the lightest halogen. It is exceptionally reactive as it reacts with all the other elements except for helium, argon, and neon, and is the most electronegative element.

Fluorine like halogens produces an anion with a charge of -1 to acquire stability. The symbol for this ion is F-, and the name given to the ion is fluoride ion. The atomic number of fluorine is 9, therefore, the number of electrons in this anion is 9+1 = 10.

Answer: warmer because its an  exothermic reaction.

Explanation: the passage states as the products form thermal energy is absorbed thermal means heat also carbon dioxide creates bubbles

Answer:

T₂  = 550.60 K

Explanation:

Given data:

Initial temperature = 16.3°C (16.3+273 = 289.3 K)

Initial pressure = 9.30 atm

Final temperature = ?

Final pressure = 17.7 atm

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

9.30 atm / 289.3 K = 17.7 atm/T₂

T₂ =  17.7 atm × 289.3  K / 9.30 atm

T₂  = 5120.61 atm. K /9.30 atm

T₂  = 550.60 K

Answer:

Number of moles = 0.153 mol

Explanation:

Given data:

Mass of sulfur = 5 g

Number of moles of sulfur atom = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of sulfur is 32. 065g/mol.

By putting values,

Number of moles = 5 g/ 32.06 g/mol

Number of moles = 0.153 mol

Answer:

19g

Explanation:

The mass of the steam produced in this phase change process will also be 19g. This is in compliance with the law of conservation of mass.

Answer:

Xavier boiled 14 grams of water. If all of the water changed into a gas, what would be the mass of the steam?

A.

28 g

B.

0 g

C.

24 g

D.

14g

Explanation:

Answer:

C

Explanation:

Answer:

Hey, you have to solve it by Stichiometry.....answer is option A.... I have explained every option for your understanding.

Explanation:

(a.)**For option A, the volume of CO2 produced at STP will be 5.6 not 30.8 by solving equation for part I

By Stichiometry,

moles of CO2, n=11.2/22.4 = 0.5

Volume of CO2, V=11.2×0.5 =5.6

(b.)**For option B, the statement is correct

n(moles) of O2 =32/32 = 1 mol

we have to use stichiometry to find moles of CO2

n= 1/2 × 1 (coefficient of CO2/coefficient of O2) × mol of O2 (coz O2 is limiting reagent in 2nd option)

n= 0.5 mol

Mass= n × Molecular Mass

Mass= 0.5 × 44

Mass= 22g

(c.)**option C, is correct acc. to statement

(d.)**option D, is correct acc. to statement

(e.)**option E, is correct acc. to statement

Answer to this question is A part.

Hope it helps......

Answer:

chemical symbol

Explanation:

The enthalpy of the chemical reaction: ΔH rxn = -1075 kJ/mol

Based on the principle of Hess's Law, the change in enthalpy of a reaction will be the same even though it is through several stages or ways

Reaction

CS₂ (l) + 3O₂(g) ---> CO₂(g) + 2SO₂ (g)

1. C(s)+O₂(g)⇒CO₂(g) ΔH=-393.5 kJ/mol

2. S(s)+O₂(g)⇒SO₂(g)  ΔH=-296.8 kJ/mol x 2

2S(s)+2O₂(g)⇒2SO₂(g)  ΔH=-593.6 kJ/mol

3. C(s)+2S(s)⇒CS₂(l)  ΔH=+87.9 kJ/mol

Reverse

CS₂(l)⇒C(s)+2S(s)  ΔH=-87.9 kJ/mol

Add all and remove the same compound on different sides

C(s)+O₂(g)⇒CO₂(g) ΔH=-393.5 kJ/mol

2S(s)+2O₂(g)⇒2SO₂(g)  ΔH=-593.6 kJ/mol

CS₂(l)⇒C(s)+2S(s)  ΔH=-87.9 kJ/mol

---------------------------------------------------------------+

CS₂ (l) + 3O₂(g) ---> CO₂(g) + 2SO₂ (g) ΔH=-1075 kJ/mol

Answer:

68g/mol

Explanation:

The formula of ammonium sulfide is:

 Ammonium sulfide  = (NH₄)₂S

 The molar mass of a compound is the mass in gram of one mole of the substance. In a compound, it is expressed gram formula mass or gram-molecular weight.

 It is determined by the addition of the component atomic masses and then expressed in grams;

     Atomic mass of N = 14, H  = 1 and S = 32

 (NH₄)₂S  = 2[14 + 4(1)] + 32  = 36 + 32  = 68g/mol

Answer:

The answer is D

Explanation:

for a p e x

The ideal gas law describes the behavior of gases under ideal conditions.

It is a law that explains that an ideal gas is considered as part of the group of theoretical gases because it is composed of point particles that move randomly and do not interact with each other.

According to classical thermodynamics, this law is a formula that allows us to relate the properties of gases, such as pressure, the volume occupied by the gas and its temperature.

Therefore, we can conclude that the ideal gas law describes the behavior of gases under ideal conditions.

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Answer:

C) 3.3 x 104 grams

Explanation:

1 mole of water contains 6.02 × 10^23 atoms

1.1 × 10^27 atoms will contain;

1.1 × 10^27 ÷ 6.02 × 10^23

= 0.1827 × 10^( 27 - 23)

= 0.1827 × 10^(4)

= 1.827 × 10³ moles of water.

To convert mole to mass in grams, we use the formula;

mole (n) = mass (m) ÷ molar mass (MM)

Molar mas of water (H2O) = 1(2) of H + 16 of O = 18g/mol

mole = mass/molar mass

1.827 × 10³ = mass / 18

mass = 1.827 × 10³ × 18

mass = 32.886 × 10³

mass = 3.286 × 10⁴

mass = 3.3 × 10⁴ grams

Answer:

The kinetic energy increases

Explanation:

As a metal such as lead is heated past its melting point, the average kinetic energy of the atoms increases.

When temperature is increased the kinetic energy of the atoms increase which also increases the random movement of the atoms.

When such happens the distance between the atoms is usually decreased which leads to the elastic collision that occurs.