at least three everyday things that exist or occur because of science.

Answers

Answer 1

Answer:  

1.A POWER DRILL COULD SET YOUR HOUSE ON FIRE, IN THEORY.

2.STICKY NOTES COME OFF EASILY BECAUSE THEIR ADHESIVE IS UNEVEN. ...

3.GUM IS CHEWY BECAUSE IT'S MADE OF RUBBER. ...

4.OFFICE BUILDINGS ARE EVER-SO-SLIGHTLY TALLER AT NIGHT. ...

5.A LEGO BRICK CAN SUPPORT 770 POUNDS OF FORCE. ...

6.POLISHING SHOES IS LIKE FILLING IN A ROAD'S POTHOLES.

Explanation:


Related Questions

what is the name of the compound represented by the formula SI2BR6

Answers

Answer:

Disilicon Hexabromide

Explanation:

A compound H2O is named – Dihydrogen monoxide. Its common name is of course water. A compound of Si2Br6 is named – Disilicon Hexabromide. 2.

What product(s) are formed during this chemical reaction? (There will be two correct answers)

Ca + Na3PO3 rightwards arrow


CaNaPO3


Ca3(PO4)2


Ca2(PO4)3


Ca(PO3)2


Na


Na3


CaNa


No Reaction

Answers

Answer:

Ca3(PO4)2 and Na

Explanation:

The reaction equation is;

3Ca + 2Na3PO3 -------> Ca3(PO3)2 + 6Na

We must remember that calcium is above sodium in the electrochemical series. This implies that calcium can displace sodium from its solution. Calcium has a reduction potential of -2.87 V while sodium has a reduction potential of -2.71 V. The ion with the more negative reduction potential can easily displace the other in aqueous solution.

This explains why the reaction above is possible.

Can someone help? Ill give brainliest!

Directions: count each side of the reaction then Circle yes or no if it follows the law of conservation of mass

Answers

Answer:

Explanation:

before the reaction you have K=2 and Cl=4

after the reaction K=2 and Cl=2 so it does not follow the law of conservation

When 2.5 moles of N2 react according to the reaction below, how many moles of NH3 will be produced?
N2 + 3 H2 --> 2 NH3
O 2.5 moles NH3
0 2.0 moles NH3
O 1.3 moles NH3
5.0 moles NH3

Answers

Answer:

5 mol

Explanation:

by stoichiometry

nN2/1=nNH3/2

2.5=nNH3/2

nNH3=2.5×2

nNH3= 5 mol

Answer: I got 5.0 moles

Explanation:

1. Find the number of protons, neutrons, electrons and electronic structure of flourine 919F.

2. Write the chemical formula of following compound.

Magnesium hydroxide


3. Balance the following equation

_H2 + _O2 --------> __H2O

Answers

1. ₉¹⁹F

2. Mg(OH)₂

3. 2H₂ + O₂ ⇒ 2H₂O

Further explanation

1. Fluorine, atomic number : 9 , mass number = 19

Symbol : ₉¹⁹F

protons=electrons=atomic number = 9

neutrons = mass number - atomic mass

[tex]\tt n=19-9=10[/tex]

Configuration : [He] 2s² 2p⁵

2. Magnesium hydroxide is an ionic compound and is a strong base consisting of 2 ions:

Positive ion: Magnesium: Mg²⁺

negative ion: Hydroxide: OH⁻

The charges of the two are crossed, so that the compound becomes:

Mg(OH)₂

3. Reaction :

H₂ + O₂ --------> H₂O

give coefficient :

aH₂ + bO₂ --------> H₂O

H, left = 2a, right 2⇒2a=2⇒a=1

O, left = 2b, right 1⇒2b=1⇒b=0.5

Reaction becomes :

H₂ + 0.5O₂ --------> H₂O x 2

2H₂ + O₂ --------> 2H₂O

Which best explains why aluminum is a nonrenewable resource?

A)It cannot be quickly replaced.
B)It is expensive to process.
C)It conducts electricity.
D)It is useful to humans.

Answers

Answer:

A.) It cannot be quickly replaced.

Explanation:

Aluminum is extremely useful to humans but is semi-difficult to produce. Because of this, your answer will be numero uno. (Or A.)

An independent variable is....
A: What we measure
B: What we change
C: What stays the same
D: What we conclude

Answers

Answer:

B - What we change

Explanation:

Dependent Variable - What we measure

Control Variable - what stays the same

Conclusion - what we conclude

Hope this can Help!

:D

A sample of CO2 weighing 86.34g contains how many molecules?

Answers

Answer:

1.181 × 10²⁴ molecules CO₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

86.34 g CO₂

Step 2: Identify Conversion

Avogadro's Number

Molar Mass of C - 12.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of CO₂ - 12.01 + 2(16.00) = 44.01 g/mol

Step 3: Convert

[tex]86.34 \ g \ CO_2(\frac{1 \ mol \ CO_2}{44.01 \ g \ CO_2} )(\frac{6.022 \cdot 10^{23} \ molecules \ CO_2}{1 \ mol \ CO_2} )[/tex] = 1.18141 × 10²⁴ molecules CO₂

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

1.18141 × 10²⁴ molecules CO₂ ≈ 1.181 × 10²⁴ molecules CO₂

01:44:12
Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state
compare with the temperature at the end of the change?
Temperature vs. Time
140
4
100
80
Temperature (°C)
3
30
40
20
2
0
20
Time (min)
The temperature is always lower
The temperature is always the same
The temperature is usually lower
The temperature is usually higher

Answers

The answer is c because it is temp and it moves time

Which of the following most likely happens when thermal energy is removed from a chemical reaction?

Answers

Answer:

fewer collisions occur between particles or lowering the temperature

Explanation:

Which states of matter can form solutions?
A. Gas-liquid
B. Solid-solid
C. Solid-liquid
D. All of the above

Answers

Answer:

c

Explanation:

spongebob cheese pants

Answer:

I believe D

Explanation:

im not super sure but I'm pretttyyy sure

When 0.25 moles of NH3 are produced according to the reaction below, how many moles of H2 must have reacted?
N2 + 3 H2 --> 2 NH3
O 1.5 moles H2
O 0.38 moles H2
O 0.25 moles H2
O 0.17 moles H2

Answers

Answer:

Explanation:

by stoichiometry

nNH3/2=nH2/3

0.25/2=nH2/3

nH2=0.25×3/2

nH2=0.375 mol

so its 0.38 mol

Answer:

I have this quiz rn I will try 0.38 if it is right I’ll edit this and say that

Explanation:

How many grams of glucose are in 4.5x1023 molecules of glucose?:

Answers

Answer:

[tex].5865 \\ \\ \\ \\ \\ \5865[/tex]

[tex] \\ \\ 5865 \inf \inft \cos( \\ \) [/tex]


Hannah added a silvery white metal to a beaker of cold water and noticed that
gas bubbles were given off and a different substance formed. When she
repeated the activity with hot water she noticed the gas bubbles were released
much more rapidly. Which statement best explains why the reaction occurred
faster in hot water?
A ) Hot water increases the collision rate of the molecules, causing the
reaction to occur faster.
B ) Hot water changes the concentration of the chemicals, causing the
reaction to occur faster.
C ) Hot water increases the surface area of the molecules, causing the reaction
to occur faster.
D ) Hot water changes the chemical composition of the water molecules,
causing the reaction to occur faster.

Answers

Answer:

A. Hot water increases the collision rate of the molecules, causing the

reaction to occur faster.

Explanation:

Hot water molecules move faster than cold water molecules.

explain why the reaction between lead (II) nitrate and concentrated sulphuric (VI) acid starts and stops immediately?​

Answers

Answer:

The reaction produces insoluble lead (II) sulphate which coats the surface of lead (II) nitrate  [Pb(NO3)]

Help me with homework.

Answers

The chemical equation is said to be balanced if the number of atoms in the reactants and products is the same

Further explanation

Equation balanced ⇒ total number of atoms in reactants(on the left)= total number of atoms in products(on the right)

H₂+O₂---> H₂O

Reactants : H₂, O₂

Products : H₂O

not balanced

H₂O₂ ---> H₂O+O₂

Reactants : H₂O₂

Products : H₂O, O₂

not balanced

Na+O₂ ---> Na₂O

Reactants : Na, O₂

Products :  Na₂O

not balanced

N₂+H₂ ---> NH₃

Reactants : N₂, H₂

Products :  NH₃

not balanced

P₄+O₂---> P₄O₁₀

Reactants : P₄, O₂

Products :  P₄O₁₀

not balanced

Fe+H₂O ----> Fe₃O₄ + H₂

Reactants : Fe, H₂O

Products :  Fe₃O₄

not balanced

K20
Molar Mass (g/mole)
2(39.10) + 16.00 = 94.20 g/mole
Moles
5.85 moles
Mass (grams)
Particles

Answers

Answer:

yes

Explanation:

that is the answer

Select ALL of the following statements that are incorrect.

Solids, liquids, and gases are all able to act as solutes in a solution.
Solids, liquids, and gases are all able to act as solvents in a solution.
Solids are not able to act as a solvent if a gas is the solute.
Gases are not able to act as a solvent if a solid is the solute.

Answers

Answer:the 4th one is incorrect,and the 1st one is incorrect hope this helps.

Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.

Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.

On the other hand, gases can also act as a solvent if a solid is the solute.

Explanation:

Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.

Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.

On the other hand, gases can also act as a solvent if a solid is the solute.For example, air present in the surrounding acts as a solvent and solid substances present in the surrounding acts as a solute.

Hence, the statement gases are not able to act as a solvent if a solid is the solute, is false.

Thus, we can conclude that following are the statements which are incorrect.

Solids are not able to act as a solvent if a gas is the solute.

Gases are not able to act as a solvent if a solid is the solute.

What is the term
chemistry​

Answers

Answer:

Chemistry is the scientific study of the structure of substances, how they react when combined and how they behave under different situations.

Answer:

The branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

Explanation:

Hope this helps!!!!!!

:)



In lab you reacted 60 grams of propane (C3H8) with 13 grams of oxygen gas (O2). Your

reaction made 63 grams of water (H2O). The reaction is shown below:

How much carbon dioxide (CO2) is released into the air?

C3H8 + 5O2 ------> 3CO2 + 4H2O

10 g

73 g

120 g

1368

Answers

Answer:

120g

Explanation:

Based on the reaction, when 1 mole of propane and 5 moles of oxygen react, 3 moles of CO2 and 4 moles of H2O are produced. The ratio of production is 3 moles of CO2 per 4 moles of H2O.

Thus, we need to convert mass of water to moles using its molar mass:

Moles H2O (Molar mass: 18g/mol):

63g H2O * (1mol / 18g) = 3.5 moles H2O

Converting to moles of CO2:

3.5 moles H2O * (3 moles CO2 / 4 moles H2O) = 2.625 moles CO2

Mass CO2 (Molar mass: 44g/mol):

2.625 moles CO2 * (44g / mol) = 115.5g of CO2 are released

120g

Which of these products was made using a renewable resource?
O A. Paper plate
O B. Aluminum can
O C. Copper pan
O D. Plastic bag

Answers

Answer:

paper plate

Explanation:

A renuable source is a source that would replenish in ones lifetime. Trees make paper and grow in the span of a average human life.

Help please! A gas occupies 500 mL at 270 mm Hg and 55°C. If the pressure is changed to 1.8 atm and the temperature is
increased to 100°C, what is the new volume? Be sure to show the setup and the final answer and unit.
Show Your Work

Answers

Answer:

V₂ = 112.14 mL

Explanation:

Given data:

Initial volume = 500 mL

Initial pressure = 270 mmHg (270/760 =0.355 atm)

Initial temperature = 55 °C (55 +273 = 328 K)

Final temperature = 100°C (100+273 = 373 K)

Final volume = ?

Final pressure = 1.8 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 0.355 atm × 500mL × 373 K / 328 K × 1.8 atm

V₂ = 66207.5 atm .mL. K /  590.4 K.atm

V₂ = 112.14 mL

Which of the following is an indication of a physical change?
O A. The formation of a new substance
O B. Giving off a smell
O C. A change in the shape of a substance
O D. The production of gas and heat

Answers

I would like to say c

Answer:

A change in the shape of a substance

Explanation:

Because when ths shape of a sunstance changes , its physical appearance changes .A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.

Construct the chemical formulas for the ionic compounds.

Answers

Ionic compounds are formed from metal and non-metal elements

Further explanation

The chemical formula of compounds (especially ionic compounds) can be determined from the charge of each ion.

Determination of the ionic charge of the constituent elements of the compound can be seen from the electron configuration to achieve stability according to the octet rule

The charge of each ion will be crossed in the compound

Aluminum bromide

Al³⁺ + Br⁻ ⇒ AlBr₃

Magnesium bromide

Mg²⁺ + Br⁻ ⇒ MgBr₂

Sodium sulfide

Na⁺ + S²⁻ ⇒ Na₂S

Sodium nitride

Na⁺ + N³⁻ ⇒ Na₃N

How many moles of Cl2 are needed in order to produce 100.0 grams of FeCl3 given the following
equation: 2 Fe + 3 Cl2 → 2 FeCl3
B
T

Answers

Answer:

0.92moles

Explanation:

Given reaction:

              2Fe + 3Cl₂ →  2FeCl₃

Mass of FeCl₃  = 100g

Unknown:

Number of moles of Cl₂  needed = ?

Solution:

To solve this problem, we work from the known specie to the unknown.

From the mass of the FeCl₃ given, we can solve for the number of moles of the unknown.

Number of moles of FeCl₃;

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of  FeCl₃ = 56 + 3(35.5) = 162.5g/mol

   Number of moles  = [tex]\frac{100}{162.5}[/tex]  = 0.62mole

From the reaction expression;

           2 mole of FeCl₃ is produced from 3 moles of  Cl₂  

           0.62 mole of FeCl₃ will be produced from [tex]\frac{0.62 x 3}{2}[/tex]   = 0.92mole

The number of moles of Cl₂  = 0.92moles

Air that has been removed from a bell jar will NOT allow _____________ waves to travel through the jar. Question 4 options: sound light water

Answers

Answer:

Sound.

Explanation:

Sound requires a medium such as air to travel.

P and Q are two substances such that the melting point of P and the boiling point of Q are the same. If P is a solid at a certain temperature, what state will Q be in at the same temperature?

Answers

Answer:

Explanation:

Firstly, it should be noted that melting and freezing points are the same. Thus, when a substance melts at a certain temperature, it means it can also start freezing/solidifying at that same temperature. That been said, when the substance P is a solid at a certain temperature, the other compound Q will boil at that same temperature and hence will be a gas at that same temperature.

If P is solid, it simply means that Q must still be in the liquid state.

From the question, we can see that, the melting point of P and the boiling point of Q are the same. The melting point of a substance is the temperature at which the solid turns to liquid while the boiling point of a substance is the temperature at which a liquid turns to a gas.

If P is solid, it simply means that Q must still be in the liquid state. It has not yet started boiling since the melting point of P and the boiling point of Q are the same.

Learn more: https://brainly.com/question/8553652

someone help me please i’ll give brainly

Answers

Answer:

b

Explanation:

i looked it up on Google

State the career function of mechanical engineering​

Answers

Answer:

Mechanical engineers design power producing machines, like electric generators, internal combustion engines, and steam and gas turbines, also power using machines, such as refrigeration and air-conditioning systems. Mechanical engineers design other machines inside buildings, such as elevators and escalators.

Explanation:

At the Beltway Outlet store, you buy x computer games for 13$ each and a magazine for 4$. Write an expression in simplest form that represents the total amount of money you spend. Someone please help

Answers

Answer:

y  = 13x + 4

Explanation:

Given parameters:

number of computer games bought  = x

cost of each games  = $13

number of a magazine  = 1

cost of magazine  = $4

Unknown:

Total amount of money spent = ?

Solution:

The total amount spent;

  let total amount  = y

 y  = total cost of magazine + total cost of computer games

 total cost of magazine  =$4

 total cost of computer games  = 13x

y  = 13x + 4

Other Questions
The pancreas is a human body organ that produces digestive enzymes and two very important hormones : insulin and glucagon. These two hormones work together to regulate the level of the sugar glucose in the bloodstream. If glucose levels in the bloodstream are too low, the pancreas secrets glucagon which causes the glucose level to increase. if blood levels are too high, the hormone insulin will lower the glucose level. if a person has just eaten a meal containing a large amount of sugar and other carbohydrate, which statement best describes how the pancreas will respond. explain what the purpose of a gene is!!!!*20* What can happen if we do not keep ourselves clean?our communities or workplaces clean If government spending increases in China, what will the effect on their GDP be? help please! will mark brainliest! Which statement best completes the diagram? Cause Effect ? Ashoka decides to promote Buddhist ideals in the Mauryan Empire. A. Ashoka the Great sends representatives to foreign countries. B. Ashoka the Great leads an extremely bloody battle. C. Ashoka the Great meets with Alexander the Great. D. Ashoka the Great is defeated by Buddhist armies. Differences between Central Banks and Commercial Banks (In english) In 5 points Waterway Industries purchased machinery for $905000 on January 1, 2017. Straight-line depreciation has been recorded based on a $52000 salvage value and a 5-year useful life. The machinery was sold on May 1, 2021 at a gain of $13000. How much cash did Waterway receive from the sale of the machinery? "A claim is simply a statement of opinionyour point of view regarding a topic. However, a strong claim in an argument should be significant." Which sentence contains the most significant claim.PLEASE HELP QUICK!!!!!!!!!!!!!!!!!!!!! What is the answer? Please Where are Christians allowed to assemble? please help me thanks EXERCISE 52 Prepare a Cost-Volume-Profit (CVP) Graph LO52 Karlik Enterprises distributes a single product whose selling price is $24 per unit and whose variable expense is $18 per unit. The companys monthly fixed expense is $24,000. Required: 1. Prepare a cost-volume-profit graph for the company up to a sales level of 8,000 units. 2. Estimate the companys break-even point in unit sales using your cost-volume-profit graph. Does anyone know any good resources for Spanish? Select the correct answer from the drop-down menu.Chrissie shirks the additional work given to her.She lacks the trait of WILL MARK BRAINIEST PLEASE HELP!! Read this passage from Through the Looking-Glass. "My NAME is Alice, but "It's a stupid enough name! Humpty Dumpty interrupted impatiently. "What does it mean? "MUST a name mean something? Alice asked doubtfully. "Of course it must, Humpty Dumpty said with a short laugh: "MY name means the shape I amand a good handsome shape it is, too. With a name like yours, you might be any shape, almost. The tone of this excerpt shows that Humpty Dumpty is A inexperienced B jealous. D impatient. D uncomfortable. How do I get the fractional form for cos 4/3? PLS NEED HELP IM BEHIND BAD During geometry class, students are told that TSR USV. Marcus states that TSR is mapped to USV by performing a rotation about point S. Sam states that TSR is mapped to USV by a reflection across the line that goes through point S. Determine if either student is correct.