Juan measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 ml
What is the density of the piece of metal?

Answer:

I believe Si12H26+02 is the coefficient I might be wrong, Sorry if I am.

Answer:

magma

Explanation:

magma is the stuff under the earth's surface, from the greek word mágma, which means thick unguent.

magma has been found on other planets!

The balanced equation for the reaction of acetylene (C₂H₂) and oxygen (O₂) is; 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g) + heat

The coefficients in the balanced equation represent the stoichiometric ratio of the reactants and products in the chemical reaction. In this case, 2 molecules of acetylene (C₂H₂) react with 5 molecules of oxygen (O₂) to produce 4 molecules of carbon dioxide (CO₂) and 2 molecules of water (H₂O), along with the release of heat.

The balanced equation shows that the number of atoms of each element is the same on both the sides of the equation, in accordance with the law of conservation of mass.

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Sally is wrong because copper is less electropositive than hydrogen, thus, can not displace hydrogen from dilute acids.

The reactions to prepare copper (ii) chloride are:

the chlo­ri­na­tion of cop­per sul­fide at a high tem­per­a­ture

reaction of copper (ii) oxide with dilute hydrochloric acid

The equations of the given reactions are as follows:CuS + Cl₂ ---> CuCl₂ + SCuO + 2HCl ----> CuCl₂ + H₂O

Reactive metals are metals that readily give up their electrons to form positive ions.

Reactive metals displace hydrogen from dilute acids. They are found in group 1A and 2A of the periodic table. Copper is not a reactive metal and will not displace hydrogen from acids.

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Sally is wrong because copper chloride is not made from the reaction of copper and dilute hydrochloric acid.

2. Copper (ii) chloride can be prepared as follows:

3. the equations of the reaction are:

Single replacement reactions are reactions in which a more reactive atom replaces another atom in a compound.

An example of a single replacement reaction is the reaction of chlorine gas with copper sulfide at high temperatures to form copper chloride.

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Despite having similar minerals plagioclase feldspar and pyroxene and chemical compositions, gabbro and basalt are two distinct igneous rocks.

Dacite is a fine-grained extrusive rock that is similar to andesite in general but has more quartz and less calcic plagioclase than andesite; Many claim that it is granodiorite's extrusive counterpart.

Andesite and diorite are comparable rocks. They are found in the same places and contain the same minerals. Their cooling rates and grain sizes are what differentiate them. Within the Earth, diorite slowly crystallized.

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Answer: The answer is incus

For the equilibrium Fe³⁺ (aq) + SCN⁻(aq) → FeSCN²⁺ (aq) + heat equations for the reactions is describe as below:

Since, it is an equilibrium if you apply any stress (concentration of product or reactant, heat and pressure) on the reaction. it will adjust itself in order to reduce the applied stress.

a. FeCl solution, 0.10 M

FeCl → 3 Fe³⁺ +3Cl³⁻

it increases the concentration of Fe³⁺ hence, equilibrium is shifted towards right.

b. KSCN solid

KSCN → K⁺ +SCN⁻

it increases the concentration of SCN (reactant) hence, equilibrium is shifted towards right.

c. Fe(NO₃) ₃ solution, 0.10 M

Fe(NO₃)₃  → Fe³⁺ + 3NO₃⁻

it increases the concentration of Fe³⁺, hence, equilibrium is shifted towards right

d. Na₂HPO₄, solution, 0.10 M

Na₂(HPO₄) → 2Na⁺ + HPO₄²⁻

HPO₄²⁻ +Fe³⁺ → Fe₂ (HPO₄)₃

since, it reduces the concentration of Fe³⁺ equilibrium will shifted towards left side

e. Na₂HPO₄ solid

since, it reduces the concentration of Fe³⁺ equilibrium will shifted towards left side.

f. Deionized water

It will reduce the formed heat, and the heat required for the backward reaction is not available. equilibrium will stay on right.

(will not affect)

g. Ice

It will reduce the formed heat and the heat required for the backward reaction is not available, equilibrium will stay on right.

So, this is the explanations for the given reaction.

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Answer:

Explanation:

Discussion

When Pressure increases  equilibrium shifts to the side with the smallest number of moles. But which side is that?

N2(g) + 3H2(g) ⇌ 2NH3(g)

The left side has 1 mol of nitrogen (N2) and 3 moles of Hydrogen = 4 mols

on the left side.

The right side has 2 mols of NH3 = 2 mols on the right.

Conclusion: You tell the number of mols by the Balance numbers to the left of each chemical in an equation.

Since the left side N2 + 3H2 = 4 mols, the equilibrium does NOT shift left.

2NH3 is only two mols.

The equilibrium shifts Right

Answer

D

Answer:

%Sgr = 1% (1 sig.fig.)

Explanation:

mass water = 350ml x 0.975g/ml = 341.25g

mass sugar added = 4g

solution mass = 341.25g + 4g = 345.25g

%sugar = (4g/345.25g)·100% = 1.1586% ≅ 1% (1 sig.fig)

The percent composition by the mass of the sugar solution is:

e. 1.16 %

This can be calculated by using mass of sugar.

Mass of water = 350ml x 0.975g/ml = 341.25g

Mass of sugar added = 4g

Total solution's mass = 341.25g + 4g = 345.25g

%sugar = (4g/345.25g)·100%

%sugar= 1.1586% ≅ 1.16 %

Thus, the percent composition of sugar is 1.16%. Hence, option E is correct.

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Answer:

Tangible

Explanation:

Tangible alone means it is "perceptible by touch," meaning you physically observe the object with your sense of touch.

Having tangible motivation is like working for money or a trophy.

Answer:

A rock is solid, Water is liquid and smoke is a gas

The particles of gas can move around freely because of how spaced out the are and how fast the move throughout the air.

Water can move easily because of it being a liquid the molecules can move around more freely then a solid. The molecules are more spread apart and move a bit faster than a solid.

Temperature and pressure

Explanation:

Answer:

They make oxygen!! :))

Explanation:

Hope this helps <3333

Answer:

Energy

Explanation:

Plants make energy through the process of photosynthesis. They are the producers, so they produce energy for the other organisms. When the consumer eats the plants, they get energy.

Hope this helped a little!

Answer:

3.0 M

Explanation:

The molarity formula is M = n/v

where M is the molarity, n is the number of moles, and v is the volume in litres.

step 1: convert the grams of KNo3 to moles. To convert grams to moles, divide by the molar mass.

(30 g divided by 101.103 g/mol) = 0.296 moles

step 2: convert the volumes to Litres. 100 mL is 0.1 L

step 3: apply the formula. Molarity = (0.296 mol / 0.1 L) = 2.96 mol/L

We will round our answer to 3.0 M

The venom of a snake, the horns of cattle, the wax-producing glands of bees, and the bright plumage of birds all are physical adaptations that increase an organism's chances of physically defending itself.

Physical adaptations do develop over many generations. The shape of a bird's beak, the thickness or thinness of the fur, and the shape of the nose or ears are examples of physical adaptations.

Adaptation can be described as a characteristic that provides defense for an animal to survive in its habitat. All animals should be able to get food and water, protect themselves from harm, and climate, and reproduce young species.

Horns and antlers can be used to protect themselves, fight for territory, or to attract a mate. The leaves are coated in the wax which reduces water loss and stops the plant from drying out. Some butterflies and birds have bright, vivid colors that provide them stand out from their surroundings and serve as a warning to predators.

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Answer:

74.87% Carbon

Explanation:

The molecular mass of CH4 is 16.042 g/ mole.

X=(100 × 12.01) / 16.042= 74.87%  

Answer:

\(\boxed {\boxed {\sf 74.87 \% \ C}}\)

Explanation:

We want to find the mass percent composition of carbon in methane: CH₄

First, we must calculate the gram formula mass, also called the molar mass. Use the values for mass found on the Periodic Table. Look for carbon and hydrogen.

There is no subscript after C, so there is just 1 atom. There is a subscript of 4 after H, so there are 4 atoms of hydrogen. We must multiply hydrogen's mass by 4.

Calculate the percent composition.

\(\frac {mass \ of \ part}{mass \ of \ whole} *100\)

The part is the carbon, or 12.011 grams.

The whole is the entire compound, CH₄, or 16.043 grams.

\(\frac { 12.011 \ g }{ 16.043 \ g} *100\)

\(0.748675435*100\\74.8675435\)

Let's round to the nearest hundredth. The 7 in the thousandth place tells us to round the 6 to a 7.

\(74.87 \% \ C\)

The mass percent of carbon is 74.87%

Answer:

Answer 'A' is correct

Explanation:

For any reaction to occur, 4 events must occur simultaneously. These are...

1. reacting compounds must be at concentrations that allow them to find on another. Such is concentration dependent and is referred to as Kinetic Feasibility.

2. reacting compounds must collide in very specific orientations for bonding to occur. The reacting compounds have unique molecular geometries such that bonding only occurs if the compounds collide in a required orientation.

3. The reacting compounds must have a natural tendency to react and form chemical bonds.

4. The reacting system must be at sufficient temperature (which delivers sufficient energy (ΔEₐ) such that events 1, 2 and 3 have the highest probability of occurring simultaneously. This occurs at the activation energy point (k = A·e^(-ΔEₐ/RΔT) => lnΔk = lnA - ΔEₐ/RΔT) =>  The Arrhenius Equation of Kinetic Reactivity.

Answer:

Na3N

Explanation:

cuzdoodlikeimsosure

(a) Condensation reaction is a reaction whereby two molecules combine to form a single molecule. During this reaction, water is removed. For example, two amino acids combine by a covalent bond, water molecule is then removed as a second product. Esterification is a type of condensation reaction, whereby an ester is formed from an alcohol and a carboxylic acid. Another example of condensation reaction is saponification which describes the alkaline hydrolysis reaction of an ester.

(b) Addition reaction is a reaction whereby a double bond is broken by additing an element. Unsaturated organic molecules participate in addition reactions, this is because unsaturated organic molecules are those that have double bonds.

For example addition of hydrogen: Addition of hydrogen to a carbon-carbon double bond is called hydrogenation, which results in the removal of the double bond.

The volume of the base that we are going to require in the process would be 28.5 mL

A neutralization reaction is a chemical reaction that occurs when an acid reacts with a base to form a salt and water. It is called a neutralization reaction because the resulting solution is neutral, with a pH of around 7.

We have that;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

VB = CAVANB/CBNA

VB = 0.132 * 12 * 2/0.111 * 1

VB = 28.5 mL

We are going to use the base that would have a volume of 28.5 mL

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Answer:

403.2 grams of oxygen

Explanation:

According to the balanced chemical equation, 2C2H6 + 7O2 —> 4CO2 + 6H2O, 4 moles of carbon dioxide (CO2) are produced for every 7 moles of oxygen (O2) that react. Therefore, if 7.2 moles of carbon dioxide are produced, the number of moles of oxygen that react is (7.2 moles CO2) * (7 moles O2 / 4 moles CO2) = 12.6 moles O2.

Since the molar mass of oxygen is approximately 32 g/mol, the mass of oxygen that reacts is (12.6 moles O2) * (32 g/mol) = 403.2 g. Therefore, 403.2 grams of oxygen react in order to produce 7.2 moles of carbon dioxide.

When one element in the compound has been swapped out for another, the single replacement reaction can be recognized. Option C is right as a result.

The replacement reaction is the process in which a compound is formed after a highly reactive element has replaced a low reactive element.

The reaction is listed as follows:

AX + Y X + AY

The highly reactive X causes Y to replace Y in the complex, creating the compound AX.

One element in a compound is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.

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The concentration in weight percent is 40%

The following data were obtained from the question:

Concentration in weight percent = (mass of sugar / total mass) × 100

Concentration in weight percent = (6.000 / 15.000) × 100

Concentration in weight percent = 0.4 × 100

Concentration in weight percent = 40%

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Answer:

A canyon has formed.

Explanation:

Answer:

Examples of physical changes are boiling, melting, freezing, and shredding. Many physical changes are reversible, if sufficient energy is supplied. The only way to reverse a chemical change is via another chemical reaction.

Answer:

the wall pushes back on you with a FORCE equal in strength to the force you exerted.

NaCl has a lower melting point than MgS.

No diagram is given above but to determine the value of melting point we need to understand the fact that NaCl has a lower melting point than MgS.

Reasons are; (1) sodium ion (+1) in the first group of the periodic table is characterized by its softness and low melting point and, (2). Is that it has a lower melting point than MgS because the COULUMBIC ATTRACTIONS between its singly charged sodium ions(+1) and the chlorine ions(-1) are weaker than those between the ions in MgS.

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--The complete question is, The ionic compounds NaClNaCl and MgSMgS are represented by the diagrams above. Which statement correctly identifies diagram 1 and identifies the compound with the lower melting point, explaining why?--

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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