several balls and sticks glued together to represent a molecule

Answers

Answer 1

Answer:

The different elements are represented by their symbols one line shows a single bond and two lines show a double bond. This written representation is called a structural diagram


Related Questions

What are the environmental impacts of chemical industries using distillation to separate chemical solutions?

Answers

Answer:

The production process often produces offensive odours and may also create by-products that can contaminate air and ground water. Many industrial separation processes have requirements and consequences that influence where they are located.

Explanation:

hope it's helpful to you

Given that 0.40 mols of NaCl was dissolved in water to create a
0.250 m solution, what is the mass of water in grams?. g

Answers

2.86 is the rong answer

The Cabbage Indicator

Your hypothesis about how to indicate various levels of pH, both acid and base with an indicator:

What liquids were used in the investigation?

Vinegar is an acid. Which liquids produced colors like vinegar?

Baking soda is a base. Which liquids produced colors like baking soda?

Did you see any that did not fit into either color group? If so which one(s)?

Could you determine the relative pH of the liquids by the varying color of the cabbage indicator?

Do you think you could add drops of a base solution into an acid solution until they indicate neutral?
How would you be able to tell when a neutral pH was obtained?


What did you find out from this investigation? Be thoughtful in your answer.

Answers

.A solution that serves as a pH indicator may be made using red cabbage, which is frequently available in homes. In essence, the color of the cabbage depends on the acidity of the solution and a pigment molecule called flavin or anthocyanin.

To determine whether a material is an acid or a base, red cabbage indicator is a purple-colored solution

Vinegar is an acid and its pH value is less than 7 and hence

Red color is produced

Baking soda is base and its pH value is greater than 7 and between 8-9  

and the color produced is sky blue

Bleach is the green which is also a basic and because the pH value is 10-11

Householder cleaner is having pH 11-13 which is basic and hence the yellow is the color of household cleaner .

A basic solution goes away from being basic and toward the center of the pH scale when an acid is introduced. The base is "neutralized" in this manner.

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Given the balanced equation representing a
reaction:
2NO+ O₂ → 2NO₂ + energy
1. The mole ratio of NO to NO₂ is
(1) 1 to 1
(2) 2 to 1
(3) 3 to 2
(4) 5 to 2

Answers

Answer: it would be a 1 to 1 ratio

Explanation: originally it would be 2 to 2 but you have to reduce

There are 4.78 g of dry LICIO4 and
2.43 g H₂O in the sample.

Step 2: Determine the moles of water and anhydrous compound.

Li = 6.94 g/mol, Cl = 35.45 g/mol,
H = 1.01 g/mol, O = 16.00 g/mol
How many moles of LICIO4 are present?

[?] mol LICIO4

Answers

Answer:

The number of moles of H₂O is 0.135 mol.

The number of moles of LiClO₄ is 0.0449 mol.

Explanation:

Mole is an important standard unit used for the measurement of large quantities of atoms, molecules, or other particles. One mole is equal to 6.022×10²³ units.

The number of moles of a substance is calculated by:

[tex]\frac{mass of substance}{molecular weight of substance}[/tex]

To find the number of moles of H₂O:

Mass of H₂O in the sample = 2.43g

The molecular weight of H₂O = 18.02g

Number of moles = [tex]\frac{2.43}{18.02}[/tex] = 0.135 mol.

To find the number of moles of LiClO₄:

Mass of LiClO₄ given = 4.78g

The molecular weight of LiClO₄ = 106.39g

Number of moles = [tex]\frac{4.78}{106.39}[/tex] = 0.0449 mol.

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Answer:

0.0449

Explanation:

No probelm

10 uses of metals in daily life

Answers

Answer:For jewellery and ornaments, gold, platinum and silver are being used.


For building purposes, iron and steel can be used.Iron and aluminium are used as utensils.

The thermometer uses mercury and helps to monitor the temperature.

The insulation wires are made of aluminium.

Aluminium foils are being used as wrappers for food.In sweets, a silver foil is being used.

To avoid rusting, zinc is used for galvanizing.In vehicles, iron is being used.

For making cable wires, copper is being used.

Explanation:

Answer:

1. For jewellery and ornaments, gold, platinum and silver are being used.

2. For building purposes, iron and steel can be used.

3. Iron and aluminium are used as utensils.

4. The thermometer uses mercury and helps to monitor the temperature.

5. The insulation wires are made of aluminium.

6. Aluminium foils are being used as wrappers for food.

7. In sweets, a silver foil is being used.

8. To avoid rusting, zinc is used for galvanizing.

9. In vehicles, iron is being used.

10. For making cable wires, copper is being used.

Explain one way in which facilitated diffusion is the same as simple diffusion.

Answers

Answer:

they both transport molecules along or down the concentration gradient of the solute and tdo not require energy from an outside source.

what can we use to help us predict the results of reaction when we put metals into competition?

Answers

The activity series of metals as well as the electrode potential of metals can be used to compare the reactivity of metals.

What is used in comparing reactivity of metals?

The reactivity of metals can be compared using their electrode potentials which is a measures of the ability of the metal to donate electrons to another metal.

When comparing the reactivity of metals, the metal with the lesser negative electrode potential will be more reactive than another with a greater negative or positive electrode potential.

Therefore, the activity series of metals as well as the electrode potential of metals can be used to compare the reactivity of metals.

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Convert 951.9 to scientific notation. for this question, a superscript is displayed using ^ (ex.
108 would be e^8).

Answers

Answer:

9.519e^-2

Explanation:

To accurately show the number in scientific notation, you need to move the decimal place to the left 2 spaces. Because you are moving the decimal place to the left, the exponent will be a negative number. Because the decimal place moves 2 units to the left, the exponent will be a -2.

Therefore, the answer in correct scientific notation is:

951.9 ----------> 9.519e^-2

If you take a 10.0 mL portion of a 14.8 M solution of NH3 and dilute it to a total solution volume of 0.500 L, what will be the concentration of the final solution

Answers

Answer:

no idea about this question sorry

What is the color of bromcresol green indicator in a solution with a ph value of 2. 0?.

Answers

Answer:

yellow

Explanation:

Question 6 of 10
What happens in a single-replacement reaction?
O A. Two reactants combine to form one product.
OB. One reactant replaces an element in another reactant.
OC. Two reactants exchange elements with each other.
D. One reactant breaks apart to form new compounds.
SUBMIT

Answers

Answer:D

Explanation:

A single-replacement reaction occurs when one element replace another in a single compound.

Answer:

B. One reactant replaces an element in another reactant.

Explanation:

Chemical reactions occur when reactants bond or break apart to form new substances known as the products.

Types of Reactions

There are a few main types of reactions:

SynthesisDecompositionSingle ReplacementDouble Replacement

All of these are different ways chemical reactions can occur.

Synthesis

Synthesis occurs when two different reactants form one product. This would be a match for answer choice A.

An example includes: [tex]C+O_{2}[/tex] → [tex]CO_{2}[/tex]

Decomposition

Decomposition occurs when one reactant breaks down, usually through heat, to form 2 different products, which matches answer choice D.

One example is: NaCl → Na + Cl

Single Replacement

Single replacement occurs when there are 2 reactants, a substance and an element, and the singular elements replaces one of the elements in the substance to form new products. Since this matches answer choice B, this is the correct answer.

For example, K + NaCl → KCl + Na

Double Replacement

Finally, double replacement is when there are 2 reactants and each switches an element with the other. This is seen in answer choice C.

One example includes: [tex]3KNO_{3} +AlCl_{3}[/tex] → [tex]Al(NO_{3})_{3} +3KCl[/tex]

For this example remember that [tex]NO_{3}[/tex] is a polyatomic ion and acts as a singular element.

Which of these is a mineral?
Folate
Vitamin A
Calcium
Sugar

Answers

Calcium is a mineral.
The answer is C,
Calcium.

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water
. What mass of oxygen gas is consumed by the reaction of 9.98 g of ammonia?
Round your answer to 3 significant digits.

Answers

9.98 g of NH₃ reacts with 23.4 g of O₂ (up to 3 significant figure).

What is Significant figures ?

The digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit.

The given chemical equation ;

4NH₃ + 5O₂ ---> 4NO + 6H₂O

Therefore,

4 moles of NH₃ reacts with 5 moles of O₂.

i.e,

68 g of NH₃ reacts with 160g of O₂.

Therefore,

9.98 g of NH₃ reacts with :

      = 160/68 x 9.98

      = 23.4 g of O₂ (up to 3 significant figure)

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Give the formula of the compound formed from the following sets of elements,
- Calcium and Fluorine
- Hydrogen and Sulfur
- Nitrogen and Hydrogen
- Carbon and Chlorine
- Sodium and Oxygen

Answers

[tex]1) \text{ } \text{CaF}_{2}\\\\2) \text{ } \text{H}_{2}\text{S}\\\\3) \text{ } \text{NH}_{3}\\\\4) \text{ } \text{CCl}_{4}\\\\5) \text{ } \text{Na}_{2}\text{O}[/tex]

Which type of electromagnetic wave has less energy than a microwave?
OA. Ultraviolet wave
OB. Radio wave
O C. An X-ray
OD. Infrared wave

Answers

Radio waves.

From lowest to highest it is radio wave, microwave, infrared, visible light, ultraviolet, x ray, and then gamma.

Explain light as the condition required for chemical change with few examples.​

Answers

Chemical reactions can be done through: 1. Physical contact 2. Solution of reactants 3. Electricity 4. Heat 5. Light 6. CatalystSunlight is important not only for us but also for plants as welll. As you know photosynthesis is a process in which light energy from the sun is used by the plants to prepare starch from carbon dioxide and water. Example: The sunlight uses the chemical reaction between carbon dioxide and water, which finally ends up in the production of starch (photo means light and synthesis means production). These chemical reactions is used by light are called as photochemical reactions.

Hich statement about scientific consensus is true? a. it represents the beliefs of most scientists. b. it is the only way to prove a theory true. c. it is necessary to form a hypothesis. d. it is an assurance that the interpretations of a study are correct. e. it is necessary before research can be published in a science journal.

Answers

The Answer should be A. A consensus is defined as a general agreement so it is something most scientists would believe.

Which best describes two ways in which hydrogen is involved in photosynthesis?
O1-Hydrogen is stored in leaves of plants.
2-Hydrogen combines with carbon dioxide to make glucose.
O1-Hydrogen is stored in leaves of plants.
2- Hydrogen combines with oxygen to make water.
O 1-Hydrogen enters plants as a component of water.
2-Hydrogen combines with carbon dioxide to make glucose.
O1-Hydrogen enters plants as a component of water.
2- Hydrogen combines with oxygen to make carbon dioxide.

Answers

Answer:

1- Hydrogen enters plants as a component of water.

2-Hydrogen combines with carbon dioxide to make glucose.

Explanation:

Hydrogen enters the plant bonded with Oxygen as water (H2O).

The water molecule splits and the Hydrogen combines with carbon dioxide to make glucose.

Answer:

1 - Hydrogen enters plants as a component of water.

2 - Hydrogen combines with carbon dioxide to make glucose.

Explanation:

What is the common uses of bases

Answers

To neutralize acids.

A thermodynamically-controlled process describes a reaction that ________.

Answers

A thermodynamically-controlled process describes a reaction that the most stable or more stable of two products is formed.

What is a  thermodynamically-controlled process?

A  thermodynamically-controlled process is a reaction in which the ratio of the product formed is determined by the relative stability of the products.

Thermodynamic control ensures that the most stable or more stable of two products is formed.

Therefore, a thermodynamically-controlled process describes a reaction that the most stable or more stable of two products is formed.

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You are trying to determine the
mass of sodium chloride required to
create a 0.875 m solution in 534 g of water. How many moles of NaCl are required?
[?] mol NaCl

Answers

The number of mole of NaCl required to prepare the solution is 0.467 mole

What is molality?

The molality of a solution is simply defined as the mole of solute per kilogram of water. It is expressed mathematically as

Molality = mole / mass (Kg) of water

How to determine the mole of NaCl requiredMolality = 0.875 MMass of water = 534 g = 534 / 1000 = 0.534 KgMole of NaCl =?

Molality = mole / mass (Kg) of water

0.875 = mole of NaCl / 0.534

Cross multiply

Mole of NaCl = 0.875 × 0.534

Mole of NaCl = 0.467 mole

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54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4A1+30₂ → 2Al2O3
Al: 26.98 g/mol Al2O3: 101.96 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[?] g Al₂O3

Answers

Answer:

102 g Al₂O₃

Explanation:

To find the mass of Al₂O₃, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Al₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given values.

Molar Mass (Al): 26.98 g/mol

Molar Mass (Al₂O₃): 101.96 g/mol

4 Al + 3 O₂ ---> 2 Al₂O₃

54.0 g Al          1 mole             2 moles Al₂O₃         101.96 g
--------------  x  -----------------  x  -----------------------  x  ----------------  =  102 g Al₂O
                        26.98 g               4 moles Al            1 mole

Answer: 102 for 54.0 and 136 for 64.0

Explanation:

A car manufacturer needs to assemble the maximum number of cars using the following equation: 1 body frame + 4 wheels + 2 headlights + 2 brakes + 1 engine It has 48 body frames, 64 headlights, 80 wheels, 60 brakes and 30 engines. What is the limiting reactant in this case?

Answers

The wheels will be completely used up and  it is the limiting reactant in this case.

What is a limiting reactant?

The limiting reactant is the reactant that is completely used up in a reaction, and thus determines when the reaction stops.

60 breaks will be used for 30 engines and 30 body frame80 wheels will be used for 20 engines and 20 body frame64 headlights will be used for 32 engines and 32 body frame

The wheels will be completely used up and  it is the limiting reactant in this case.

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First twenty element with electronic configuration​

Answers

Hydrogen (H) 1s1
2 Helium (He) 1s2
3 Lithium (Li) [He] 2s1
4 Beryllium (Be) [He] 2s2
5 Boron (B) [He] 2s2 2p1
6 Carbon (C) [He] 2s2 2p2
7 Nitrogen (N) [He] 2s2 2p3
8 Oxygen (O) [He] 2s2 2p4
9 Fluorine (F) [He] 2s2 2p5
10 Neon (Ne) [He] 2s2 2p6
11 Sodium (Na) [Ne] 3s1
12 Magnesium (Mg) [Ne] 3s2
13 Aluminium (Al) [Ne] 3s2 3p1
14 Silicon (Si) [Ne] 3s2 3p2
15 Phosphorus (P) [Ne] 3s2 3p3
16 Sulphur (S) [Ne] 3s2 3p4
17 Chlorine (Cl) [Ne] 3s2 3p5
18 Argon (Ar) [Ne] 3s2 3p6
19 Potassium (K) [Ar] 4s1
20 calcium (ca) [Ar] 4s2

the mr-vp tests are part of a battery of tests called imvic tests. these tests are useful in identifying and differentiating:

Answers

the mr-vp tests are part of a battery of tests called imvic tests. these tests are useful in identifying and differentiating  Gram-positive cocci.

What is mr-vp tests?

mr-vp tests can be regarded as a test that is used in the determination of fermentation pathway that is required in glucose.

It is used in mixed acid fermentation pathway and can be used in  identifying and differentiating  Gram-positive cocci.

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What are distilled chemicals used for and what are the environmental impacts?

Answers

Answer:

Cryogenic distillation is the commercially viable separation; however, it consumes over 20 Gigajoules of energy for every ton of ethylene produced. This energy consumption is associated with significant greenhouse gas emission and depletion of non-renewable energy resources

Explanation:

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The 225 g FeCl2 is about 1.8 moles.
What is the molar concentration of
the solution if the total volume is
450 mL?

Answers

Answer:

[tex]4 \frac{mol}{l} [/tex]

Explanation:

From the question, we have been asked to find the molarity of FeCl2 having a volume of 450 mL,

We have been provided with 225 g which is proportional to 1.8 moles.

We know that molarity of any solution should be in mol/L.

1 mole contained in 1 L means it has a molarity of 1 mol/L

Let's convert 450 mL to Litres which is,

[tex] \frac{450}{1000} litres[/tex]

= 0.450 L

Thus,

1 mole is contained in 1L

x moles are contained in 0.450 L

Hence,

x mole/molarity = {1 mole x 1 L}/{0.450 L}

= 4 mol/L

Therefore 4 mol/L is the molar concentration.

Whose view that matter is infinitely divisible was considered correct for most of the last two millennia?.

Answers

Aristotle and Democritus (to some extent) view that matter is infinitely divisible was considered correct for most of the last two millennia

What is Matter ?

Anything that occupies space and have some mass is known as matter.

Aristotle believed that everything was comprised of earth, air, water, and fire, which were infinitely divisible.

Democritus stated that matter was subdivided into indivisible and immutable particles that created the appearance of change when they joined and separated from others.

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When you have added as much solute as can dissolve in solvent the solution is called

Answers

Solubility limit. that's the answer

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