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vekshin1
3 years ago
7

Which of the following is NOT true of white dwarfs?

Chemistry
2 answers:
ella [17]3 years ago
8 0
The answer is they are cold because white dwarfs are hot when they form.
liq [111]3 years ago
6 0

Answer:

A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains. ... That means a white dwarf is 200,000 times as dense.

Explanation:

they are cold

they are about the size of Earth

these both are not true

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Which is an unnecessary rule for writing chemical formulas?
balandron [24]
The correct answer are

identify the positive ion and charge
balance the charges
identify the negative ion and charge
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3 years ago
Potassium chlorate is a white, crystalline solid. It can be broken down into potassium chloride (a salt)
lions [1.4K]

Answer:

Notice that the number of atoms of

K

and

Cl

are the same on both sides, but the numbers of

O

atoms are not. There are 3

O

atoms on the the left side and 2 on the right. 3 and 2 are factors of 6, so add coefficients so that there are 6

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atoms on both sides.

2KClO

3

(

s

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+ heat

→

KCl(s)

+

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2

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g

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Now the

K

and

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KCl

.

2KClO

3

(

s

)

+ heat

→

2KCl(s)

+

3O

2

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g

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The equation is now balanced with 2

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7 0
3 years ago
Read 2 more answers
Friction is generated when _____ interfere with each other on sliding surfaces. solids molecules forces fluids
9966 [12]
Friction is generated when sliding
5 0
2 years ago
Which ecosystem is the most diverse ecosystem?
Mashcka [7]

Answer:

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Explanation:

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3 0
3 years ago
What is the density of CHCL3 vapor at 1.00atm and 298K?
Advocard [28]

Answer:

4.8 g/mL is the density of chloroform vapor at 1.00 atm and 298 K.

Explanation:

By ideal gas equation:

PV=nRT

Number of moles (n)

can be written as: n=\frac{m}{M}

where, m = given mass

M = molar mass

PV=\frac{m}{M}RT\\\\PM=\frac{m}{V}RT

where,

\frac{m}{V}=d which is known as density of the gas

The relation becomes:

PM=dRT    .....(1)

We are given:

M = molar mass of chloroform= 119.5 g/mol

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of the gas = 298K

P = pressure of the gas = 1.00 atm

Putting values in equation 1, we get:

1.00atm\times 119.5g/mol=d\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 298K\\\\d=4.88g/L

4.8 g/mL is the density of chloroform vapor at 1.00 atm and 298 K.

7 0
3 years ago
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