1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lisabon 2012 [21]
3 years ago
12

Could someone please help me out???

Chemistry
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

<u>Time</u><u> </u><u>is</u><u> </u><u>2</u><u>.</u><u>2</u><u> </u><u>seconds</u><u>.</u><u> </u>

Explanation:

Time:

{ \boxed{ \bf{time =  \frac{distance}{speed} }}}

Substitute into the formula:

speed = 715 km/h = 198.61 m/s

{ \tt{time =  \frac{435}{198.61} }} \\ { \tt{time = 2.2 \: seconds}}

You might be interested in
Consider melting ice cream. When it melts, it takes heat away from the environment and so the reaction is endothermic. When you
ANEK [815]
Hi!

First of all, the melting of ice cream is not a chemical reaction, because there is no change in the components of the ice cream and if you freeze the ice cream again, you will get the same ice cream that you had previously.

The melting of ice cream is an example of a physical change, in which a substance goes from solid to liquid state, and it is an endothermic physical change.

When you freeze ice cream, the heat is removed from the ice cream, making it an exothermic process, when heat is liberated to the environment and it's taken away from the substance, in this case, the ice cream.


7 0
3 years ago
Burning magnesium.<br> Mg + O2 →
Aleksandr-060686 [28]
Can you tell question nicely i didn’t understand the question
6 0
2 years ago
What is the theoretical yield of aluminum that can be produced by the reaction of 60.0 g of aluminum oxide with 30.0 g of carbon
Varvara68 [4.7K]

Answer: 31.8 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Al_2O_3=\frac{60.0g}{102g/mol}=0.59moles

\text{Moles of} C=\frac{30.0g}{12g/mol}=2.5moles

Al_2O_3+3C\rightarrow 2Al+3CO  

According to stoichiometry :

1 mole of Al_2O_3 require 3 moles of C

Thus 0.59 moles of Al_2O_3 will require=\frac{3}{1}\times 0.59=1.77moles  of C

Thus Al_2O_3 is the limiting reagent as it limits the formation of product and C is the excess reagent as it is present in more amount than required.

As 1 mole of Al_2O_3 give = 2 moles of Al

Thus 0.59 moles of Al_2O_3 give =\frac{2}{1}\times 0.59=1.18moles  of Al

Mass of Al=moles\times {\text {Molar mass}}=1.18moles\times 27g/mol=31.8g

Thus 31.8 g of Al will be produced from the given masses of both reactants.

5 0
3 years ago
What is the definition of a Lewis acid?
Vedmedyk [2.9K]

Answer:

Explanation:

Un ácido de Lewis es una especie química que contiene un orbital vacío que es capaz de aceptar un par de electrones de una base de Lewis para formar un aducto de Lewis

3 0
2 years ago
Explain why decomposition of sugar on heating is an irreversible change.
Elena L [17]

Sugar, sucrose (C12H22O11: a disaccharide, composed of the two monosaccharides: glucose and fructose), is odorless, that is, it lacks odor. When heated a phase change occurs resulting in melting of a thick syrup.

5 0
3 years ago
Other questions:
  • How do I identify the ions present in K2HPO4?
    13·1 answer
  • Which chemical is added to many municipal water supplies to help prevent tooth decay?
    12·2 answers
  • Calcule el porcentaje de soluto (%vv) en una disolución preparada con 45,2 mL de ácido nítrico en 205 mL de agua.
    6·1 answer
  • Balance CH3CHO + O2 → CO2 + H2O
    15·1 answer
  • How many moles of mgci2 are there in 332 g of the compound
    7·1 answer
  • Can someone help me ASAP THIS IS IS A IMPORTANT GRADE
    10·2 answers
  • Give me lil reasoning so I know your not lying for points
    11·1 answer
  • This woman comes to the clinic with high blood pressure,
    5·1 answer
  • Which of these statements best describes an Alkali? *
    15·1 answer
  • What happens when you drop a feather and hammer on the moon and why
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!