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
MariettaO [177]
4 years ago
12

2. Why did Portugal receive Brazil?

Chemistry
1 answer:
Studentka2010 [4]4 years ago
6 0

Answer:

Brazil and Portugal share a privileged relationship,[2] as evidenced in aligned political and diplomatic coordination, as well as economic, social, cultural, legal, technical and scientific cooperation.[3]

According to a 2011 BBC poll, 76% of Portuguese people view Brazil's influence positively, with 8% viewing it negatively, the most favorable perception of Brazil for any other surveyed country in the world.[4]

Explanation:

You might be interested in
When a firecracker explodes, stored chemical energy turns into sound and light energy. What other type of energy is also release
Inga [223]
Heat energy because combustion is an exothermic reaction.
6 0
3 years ago
Which alkane is the isomer of butane called 2-methylpropane? A skeletal model of a 4-carbon chain has a straight line extending
solmaris [256]

Answer:

A three-carbon chain has a straight line extending from the center carbon.

Explanation:

Isomers are compounds having the same molecular formula but different structural formulas.

Butane and 2-methylpropane are constitutional isomers. Constitutional isomers differ in the way that the constituent atoms are connected to each other.

Butane is a straight chain compound while the compound 2-methylpropane consists of a three-carbon chain which has a straight line extending from the center carbon.

8 0
3 years ago
Read 2 more answers
Which temperature is equal to 120. K?<br> (1) -153°C (3) +293°C<br> (2) -120.°C (4) +393°C
Marysya12 [62]
First of all, the formula for finding Kelvin is Celsius + 273
Therefore, if we subtract 273, we get the temperature in degrees
120 - 273 = - 153

Therefore, the answer is (1), or -153 degrees Celsius

Hope this helped!! :D
3 0
3 years ago
How does a sample of water at 38 °C compare to a sample of water at 295 K?
Sidana [21]

Converting the temperature, 295 K from Kelvin to Celsius scale:

295 K - 273 = 22^{0} C

Water has a boiling point of 100^{0}C and a melting point of 0^{0} C

When we compare water at two different temperatures, 22^{0}C and 38^{0}C we can say that water is in liquid form at both these temperatures as both of them are quite below the boiling temperature and above the melting temperature.

The temperature difference between water at the given two temperatures = 38^{0}C - 22^{0}C = 16^{0}C

Water at 38^{0}C is at a higher temperature and so is warmer than water at a lower temperature of 22^{0}C (or 295 K).


7 0
3 years ago
How many moles of oxygen must be placed
umka21 [38]

Answer: 0.245 moles of oxygen must be placed in the container to exert the given pressure at the given temperature. The Ideal Gas Law equation gives the relationship among the pressure, volume, temperature, and moles of gas.

Further Explanation:

The Ideal Gas Equation is:  

PV = nRT  

where:  

P - pressure (in atm)  

V - volume (in L)  

n - amount of gas (in moles)  

R - universal gas constant 0.08206 \frac{L-atm}{mol-K}  

T - temperature (in K)  

In the problem, we are given the values:  

P = 2.00 atm (3 significant figures)

V = 3.00 L  (3 significant figures)

n = ?

T = 25.0 degrees Celsius (3 significant figures)  

We need to convert the temperature to Kelvin before we can use the Ideal Gas Equation. The formula to convert from degree Celsius to Kelvin is:  

Temperature \ in \ Kelvin = Temperature\ in \ Celsius \ + \ 273.15  

Therefore, for this problem,  

Temperature\ in \ K = 25.0 +273.15\\Temperature\ in \ K = 298.15  

Solving for n using the Ideal Gas Equation:  

n \ = \frac{PV}{RT}\\n \ = \frac{(2.00 \ atm) \ (3.00 \ L)}{(0.08206 \ \frac{L-atm}{mol-K})( 298.15 \ K)}  \\n \ = 0.245 \ mol

The least number of significant figures is 3, therefore, the final answer must have only 3 significant figures.

Learn More  

1. Learn more about Boyle's Law brainly.com/question/1437490  

2. Learn more about Charles' Law brainly.com/question/1421697  

3. Learn more about Gay-Lussac's Law brainly.com/question/6534668

Keywords: Ideal Gas Law, Volume, Pressure

4 0
4 years ago
Other questions:
  • When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a​
    13·1 answer
  • Which of these parts of a reflecting telescope is used to gather and focus light?
    14·2 answers
  • Which of the following chemical equations corresponds to the standard molar enthalpy of formation of Na_2CO_3(s)?
    14·1 answer
  • 1 or 2 please answer
    13·1 answer
  • For the following reaction, 27.5 grams of hydrochloric acid are allowed to react with 56.7 grams of barium hydroxide.
    8·1 answer
  • A soft drink contains 46 g of sugar(sucrose C12H22O11) how many sugar molecules are present?
    7·2 answers
  • g If a small amount of a strong acid is added to a buffer made up of a weak acid, HA, and the sodium salt of its conjugate base,
    13·1 answer
  • How are stars and comets different?
    11·1 answer
  • Select the correct answer.
    11·2 answers
  • How does the motion of particles compare between different phrases of matter?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!