Help asap please! Four options are below

Answer:What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant

The correct option is (b)

Explanation:

A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).

A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.

Explanation:

The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. ... This method is most useful when there are only two reactants. The limiting reagent can also be derived by comparing the amount of products that can be formed from each reactant.

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Answer:

C

Explanation:

cell theory states:

all living things are made of 1 or more cells

all cells come from pre-existing cells

the cell is the basic unit of structure

Answer:

um air-

Explanation:

something in the air u welcome

The second quantum number (l) describes which sublevel the electron is in

Answer:

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Explanation:

Answer:

10.3125 grams of carbon dioxide will be formed.

Explanation:

The balanced reaction is:

C₃H₈ + 5 O₂→ 3 CO₂ + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles participate in the reaction:

Being the molar mass of the compounds:

then by stoichiometry of the reaction, the following amounts of mass participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: If by reaction stoichiometry 44 grams of propane react with 160 grams of oxygen, 7.2 grams of propane react with how much mass of oxygen?

[tex]mass of oxygen=\frac{7.2 grams of propane*160 grams of oxygen}{44 grams of propane}[/tex]

mass of oxygen= 26.18 grams

But 26.18 moles of O₂ are not available, 12.5 grams are available. Since you have less mass than you need to react with 7.2 grams of propane, oxygen O₂ will be the limiting reagent.

Then you can apply the following rule of three: if by stoichiometry of the reaction 160 grams of oxygen form 132 grams of carbon dioxide, 12.5 grams of oxygen will form how much mass of carbon dioxide?

[tex]mass of carbon dioxide=\frac{12.5 grams of oxygen*132 grams of carbon dioxide}{160 grams of oxygen}[/tex]

mass of carbon dioxide= 10.3125 grams

10.3125 grams of carbon dioxide will be formed.

Answer:

Sn (s) + 2 Cl2 (g) → SnCl4 (l)

This is an oxidation-reduction (redox) reaction:

4 Cl0 + 4 e- → 4 Cl-I

(reduction)

Sn0 - 4 e- → SnIV

(oxidation)

Cl2 is an oxidizing agent, Sn is a reducing agent.

Reactants:

Sn

Names: Tin source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Sn source: wikidata, accessed: 2019-09-07, Element 50 source: wikidata, accessed: 2019-09-07

Appearance: White crystalline powder source: ICSC, accessed: 2019-09-04; Gray to almost silver-white, ductile, malleable, lustrous solid. source: NIOSH NPG, accessed: 2019-09-02

Cl2

Names: Chlorine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular chlorine source: NIOSH NPG, accessed: 2019-09-02

Appearance: Greenish-yellow compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02

Products:

SnCl4 – Tetrachlorostannane source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Tin tetrachloride source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Tin(IV) chloride source: wikipedia, accessed: 2019-09-28

Other names: Stannic chloride source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Tin(iv) chloride (anhydrous) source: ICSC, accessed: 2019-09-04

Appearance: Colorless to slightly yellow fuming liquid source: wikipedia, accessed: 2019-09-28; Colourless or slightly yellow fuming liquid with pungent odour source: ICSC, accessed: 2019-09-04

Answer:

Pangea

Explanation:

Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and began to break apart about 175 million years ago. Forming into what we have today :)

Answer:

16.6 g of Al are produced in the reaction of 82.4 g of AlCl₃

Explanation:

Let's see the decomposition reaction:

2AlCl₃ →  2Al  + 3Cl₂

2 moles of aluminum chloride decompose to 2 moles of solid Al and 3 moles of chlorine gas.

We determine the moles of salt:

82.4 g . 1mol/ 133.34g = 0.618 moles

Ratio is 2:2. 2 moles of salt, can produce 2 moles of Al

Then, 0.618 moles of salt must produce 0.618 moles of Al.

Let's convert the moles to mass → 0.618 mol . 26.98g /mol = 16.6 g

Answer:

propanoic acid

Explanation:

i hope this helps!

Answer:

Explanation:

1. New substances such as carbondioxide and water is formed.

2. There is evolution of gas bubbles. Gases are released.

3. There is either the absorption of energy or release of energy in form of light and energy.

4. The reaction is irreversible i.e it cannot be reversed, it is permanent once the reaction take place.

5. There is a change in both odor and smell.

A chemical change is a change where new substances are formed due to changes in the properties.

Explanation:

i have done

see the picture

and please mark me brainiest

Answer:

Yes it is a colligative Property

Explanation:

There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering

Answer:

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

(b) Zinc + Silver nitrate → Zinc nitrate + Silver

(c) Aluminium + Copper chloride → Aluminium chloride + Copper

(d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chlorid

Explanation:

Answer:

my probably best answer is B

Answer:

True :)

Explanation:

Answer:

T2 = 2843.1   oK. This is a huge temperature.  Check it for errors.

Explanation:

Remark

This is the same question as the other one I've answered. Only the numbers have been altered.

Givens

v1 = 56 mL

P1 = 1 atm

T1 = 273o K

v2 = 162

P2 = 3.6 atm

T2 = ?

Formula

Vi * P1 / T1 = V2 * P2/T2

Solution

Rearrange the formula so T2 is on the left

T2 = V2 P2 * T1 / (V1 * P1)          Now just put the numbers in.

T2 = 162 * 3.6* 273 / (56 *1)

T2  =  159213.6/56

T2 = 2843.1                  

Answer: C planets dont travel in perfect circles and they do not orbit earth they orbit the sun and they ellipse around the sun. this is the correct answer do not lsiten to the other person

Explanation:

The statement which is correct about planetary orbits is the planets travel in ellipses around the sun.

Orbits is the path of the motion, in which planets do revolutionary motion in a particular sequence.

In the solar system, sun is present at the center and all the planets do revolution around the sun in their orbits which are ellipse in their shape. Elliptical shape of the orbits is due the large distance of planets from the sun which reduces the speed due to less gravitational force of sun on that object.

Hence, option (C) is correct i.e. The planets travel in ellipses around the sun.

To know more about orbits, visit the below link:
https://brainly.com/question/855117

Answer:

The correct answer is - root hairs.

Explanation:

Root hairs or absorbent hair are the very small tubular outgrowth present in the epidermis of the roots of the plant that helps plants in absorbing the water from the soil pores into the plants. Water is an essential reactant in the photosynthesis process.

By their elongation increases the surface of exchange between plants and soil for better absorption. The major function of the root hairs to absorb the water and the nutrients from the soil to the plant.

Answer:

Draw the example below

Hope this helps

Hope it helps.

If you have any query, feel free to ask.

Answer:

The answer is B

Explanation:

A solution that contains a relatively low concentration of solute is called dilute, and one with a relatively high concentration is called concentrated. If we add more salt to a saturated solution of salt, we see it fall to the bottom and no more seems to dissolve.

Answer:

Overuse of resources makes them exhausted or entirely used up and may take centuries to replenish

Answer:

40.078 atomic mass units

Explanation:

Answer:

hi

Explanation:

Answer:

b

Explanation:

because the sun it's already the biggest planet

Answer:

a) pH = 9.82     b) pH = 1.65

a) pOH = 7.8     b) pOH = 4.45

Explanation:

pOH + pH = 14 for all of these solutions.

pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

3.a)Given;

pOH = 4.18

To Find;

pH = ?

We know that

pH + pOH = 14

pH = 14 – pOH

pH = 14 – 4.18

pH = 9.82

Thus, The pH of the solution is 9.82

b)Given;

pOH = 2.35

To Find;

pH = ?

We know that

pH + pOH = 14

pH = 14 – 2.35

pH = 14 – 2.35

pH = 11.65

Thus, The pH of the solution is 11.65

4. a)

Given;

pH = 6.2

To Find;

pOH = ?

We know that

pH + pOH = 14

pOH = 14 – pH

pOH = 14 – 6.2

pOH = 7.8

Thus, The pOH of the solution is 7.8

4. b)

Given;

pH = 9.55

To Find;

pOH = ?

We know that

pH + pOH = 14

pOH = 14 – pH

pOH = 14 – 9.55

pOH = 4.45

Thus, The pOH of the solution is 4.45

Learn more about pH here:

https://brainly.com/question/27228757

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