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Stolb23 [73]
3 years ago
11

A _____ change occurs when a substance changes phase

Chemistry
1 answer:
Lilit [14]3 years ago
4 0
When a substance changes phase it is called a PHYSICAL change
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One gallon of gasoline in an automobiles engine produces on average 9.50 kg of carbon dioxide, which is a greenhouse gas; that i
vagabundo [1.1K]

Answer:

The value is U  =1.3908 *10^{11} \  kg

Explanation:

From the question we are told that

mass of carbon dioxide produced by one gallon of gasoline is m  =  9.50 \  kg

The number of cars is N =  40 \  million =  40 *10^{6} \  cars

The distance covered by each car is d =  7930 \ mi

The rate is R  =  23.6 \  mi/ gallon

Generally the amount of gasoline used by one car is mathematically represented as

G  =  \frac{d}{R}

=> G  =  \frac{7930}{23.6}

=> G  =   366 \  gallons

Generally the amount of gasoline used by N cars is

H  =  N  *  G

=> H  =  40*10^{6}  *  366

=> H  = 1.464*10^{10} \  gallons

Generally the annual production of carbon dioxide is mathematically represented as

U  =  m *  H

=> U  =9.50 *   1.464*10^{10}

=> U  =1.3908 *10^{11} \  kg

8 0
4 years ago
The smallest unit of an element that still retains the distinctive behavior of that element is an.
Tju [1.3M]

The smallest unit of an element that still retains the distinctive behavior of that element is an: atom

<h3 />

A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of a chemical element

<h3>What is an atom?</h3>

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

Learn more about the atom at: brainly.com/question/17545314

#SPJ4

6 0
2 years ago
Help me please i nedd hep
mojhsa [17]

Answer:

7 to 5

Explanation:

power of 500 to 5

3 0
2 years ago
What is k in the rate law equation?
REY [17]

Answer:

B. A rate constant

Explanation:

The mathematical expression of rate law is given below,

Rate = K[A]m[B]n

This rate law show the relationship between the rate of chemical reaction and concentration of reactants.

In given equation [A] and [B] are molar concentration of reactants while K represent rate constant.

The value of K is specific for particular reaction at particular temperature,

m and n are represent exponents and determine experimentally. The value of K is not depend upon the concentrations of reactant but depend upon the surface area and temperature

5 0
3 years ago
Read 2 more answers
What are solenoids......????​
MrRissso [65]

Yo sup??

Solenoids are a kind of bar magnet.

The have low coercivity and low retentivity

The are made by taking a soft iron core and covering it with a coil.

Hope this helps.

6 0
3 years ago
Read 2 more answers
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