CHEMISTRY HIGH SCHOOL

It has been proposed that North America is moving west at about 2 cm per year. How many kilometers would it move in 5,000 years? (Note: 2 cm is a measurement so your final answer should have significant figure rules applied.)

Answers

Answer 1

Answer:

Answer: 0.1 km

Explanation:

1) Multiply the rate (speed) by the time: 2 cm / year × 5,000 year = 10,000 cm

2) Convert cm to km, using these well know conversion factors:

1 km = 1,000 m

1 m = 100 cm

⇒ 10,000 cm × [1 m / 100 cm] × [1 km / 1,000 m] = 0.1 km

Answer 2

Answer: Well it would move 10,000cm so converting that into km would be it would move 0.1km

Related Questions

Which of the following species has the greatestnumber of electrons?1. Cl1−2. Co4+3. Fe2+4. V5. Sc2−
Find the oxidation number of each sulfur in the molecule H2S4, which has a linear arrangement of its atoms.
What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?
100 Points and Brainliest to the correct answer, if you type a random answer I will reportHow can matter and energy be described and conserved in a variety of systems? Hypotheses: As you view each scenario, make a prediction about what will occur when prompted by the video. The Iced Tea Debate The Salty Soup Predictions—What do you think will happen? Materials: 1. Demonstrations: “The Iced Tea Debate” and “The Salty Soup.” Procedures: 1. Observe and analyze the following video demonstrations: “The Iced Tea Debate” and “The Salty Soup.” 2. Use the data table to record observations on physical and chemical change, and the conservation of matter and energy. Variables: List the variables for The Iced Tea Debate: Independent: Dependent: Control: List the variables for The Salty Soup: Independent: Dependent: Control: Data and Observations: Record your detailed observations and draw some brief conclusions in the table below. The Iced Tea Debate The Salty Soup Describe the physical changes you observed. Describe the chemical changes you observed. Describe the instances of conservation of matter and energy in each demonstration. Questions and Conclusion 1. How was matter and energy conserved in each demonstration? 2. What phase changes did you observe? 3. What kind/s of energy transfers did you notice in each scenario? 4. Identify an example of matter and energy conservation in the world around you. Conclusion: How did your observations support or contradict your predictions? Describe an experiment that could further explore physical or chemical change.
What happens to a water bottle in a freezer and why

What is the most common salt found in ocean water?

Answers

Hello.

The answer i believe would be sodium.

Have a great day.

Name three acids and three bases and a list an industrial or household use of each

Answers

Acid: Lemon, vinegar, grapefruits
Base: Soap, oven cleaner, ammonia
The bases are cleaners, and the acids are fruits, bases have a bitter taste, and acids have a sour taste. Hope this helps!

Three acids
Sulfuric Acid
Hydroflouric Acid
Phosphoric Acid

Three bases
Sodium Hydroxide
Calcium Hydroxide
Potassium Hydroxide

Sulfuric Acid is used as a catalyst in the alkalation reaction section. The alkalation unit in a refinery produces alkylate which is used to give distilled raw gasoline a higher octane rating.

Hydroflouric Acid is also used in a different type of alkalation unit which is currently being phased out due to Hydroflouric Acid dangerous nature.

Phosphoric Acid is used in industrial cooling towers to aid in controlling scale inside piping in cooling water systems.

Sodium Hydroxide is also used in crude oil refinery settings to aid in neutralizing low pH systems in the refinery process .

Calcium hydroxide is used to eliminate moisture in propane systems in the alkalation process.

Potassium hydroxide is used to clean refinery vessel used in the crude refining process.

Given the lattice energy of NaCl = 787 kJ/mol, the ionization energy of Na = 496 kJ/mol and the electron affinity of Cl = −349 kJ/mol, calculate the ΔH o for the reaction: Na(g) + Cl(g) → NaCl(s)

Answers

Answer : The value of $\Delta H_f^o$ for the reaction is, -640 KJ/mole

Explanation :

The steps involved in the formation of $NaCl$ :

(1) Conversion of gaseous sodium atoms into gaseous sodium ions.

$Na(g)\overset{\Delta H_I}\rightarrow Na^(+1)(g)$

$\Delta H_I$ = ionization energy of sodium = 496 kJ/mol

(2) Conversion of gaseous chlorine atoms into gaseous chlorine ions.

$Cl(g)\overset{\Delta H_E}\rightarrow Cl^-(g)$

$\Delta H_E$ = electron affinity energy of chlorine = -349 kJ/mol

(3) Conversion of gaseous cations and gaseous anion into solid sodium chloride.

$Na^(1+)(g)+Cl^-(g)\overset{\Delta H_L}\rightarrow NaCl(s)$

$\Delta H_L$ = lattice energy of sodium chloride (always negative) = -787 kJ/mol

To calculate the overall energy the equation used will be:

$\Delta H_f^o=\Delta H_I+\Delta H_E+\Delta H_L$

Now put all the given values in this equation, we get:

$\Delta H_f^o=496KJ/mole+(-349KJ/mole)+(-787KJ/mole)$

$\Delta H_f^o=-640KJ/mole$

Therefore, the value of $\Delta H_f^o$ for the reaction is, -640 KJ/mole

Explain different ways you could increase the reaction rate, and/or decrease the reaction rate

Answers

ways to increase reaction rate:
*increase the total surface area per volume ratio
*increase the temperature
*increase the pressure
*decrease the size of particles

What ion must be present for a compound to be considered a base?

Answers

it is OH- (hydroxide ion)

Which substance can not be decomposed by a chemical change?A. Ammonia

B. Copper

C. Propanol

D. Water

(P.s, tysm )

Answers

The substance that cannot be decomposed by a chemical change is: B. Copper

What is copper

Copper is an element, and elements cannot be broken down into simpler substances through chemical changes. Chemical changes involve the rearrangement of atoms in molecules, leading to the formation of new substances.

However, in the case of an element like copper, it is composed of only one type of atom (Cu), and it cannot be further broken down into simpler substances by a chemical reaction.

Read mroe on copper here brainly.com/question/26449005

#SPJ2

B. Copper since the rest of the choices are compounds. Copper is an element.

Other Questions

In this model of a molecule of ammonia, NH3, how many covalent bonds are represented?

I've been waiting for like 10 mins. Please answer this.Which of these equations describes photosynthesis? A. 6CO2 + C6H12O6 --> 6H2O + 6O2 B. 6CO2 + 6H2O --> C6H12O6 + 6O2 C. C6H12O6 + 6O2 --> 6CO2 + 6H2O D. 6CO2 + 6O2 --> C6H12O6 + 6H2O

Which information about a chemical reaction is provided by a potential energy diagram?(1) the oxidation states of the reactants and products(2) the average kinetic energy of the reactants and products (3) the change in solubility of the reacting substances (4) the energy released or absorbed during the reaction

How would the equilibrium change if NO2 were added to SO2(g) + NO2(g) NO(g) + SO3(g) + heat?A. The equilibrium constant would increase. B. The amount of NO and SO3 would decrease. C. The amount of NO and SO3 would increase. D. The amount of NO2 and SO2 would increase.