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8_murik_8 [283]
3 years ago
11

Andromeda is an example of a/n _______ galaxy.

Chemistry
2 answers:
stellarik [79]3 years ago
6 0
<span>spiral galaxy. A spiral galaxy is characterized by a massive concentration of stars, dust, and gas that take the shape of a rotating disk. They are named this way because their fringes take a spiral formation that gradually connects to a dense cluster of stars at the center.</span>
Morgarella [4.7K]3 years ago
3 0
The answer is spiral
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a solution contains 4.5 times 10 to the negative 3 M HCI. Determine the hydroxide concentreation of the solution.
frosja888 [35]
HCl ----------> H(+) + Cl(-)
0,0045-x.........x...........x
0..................0,0045...0,0045

pH = -log[H+]
pH = -log[0,0045]
pH = 2,347

pOH = 14-pH
pOH = 14-2,347
pOH = 11,653

pOH = -log[OH-]
[OH-] = 10^-pOH
[OH-] = 10^-11,653
[OH-] = 2,2233·10^-12 mol/dm³
3 0
3 years ago
A rock sample has a mass of 125 grams and a volume of 50 mL. What is the density of this rock sample?
iris [78.8K]

Answer:

2.5g/ mll

Explanation:

d=m/v

5 0
3 years ago
A weather balloon is filled with helium that occupies a volume of 3.93 104 L at 0.995 atm and 32.0°C. After it is released, it r
user100 [1]

Answer: Thus the volume of the balloon at that new location is 4.65\times 10^4L

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.995 atm

P_2 = final pressure of gas = 0.720 atm

V_1 = initial volume of gas = 3.93\times 10^4L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 32.0^oC=273+32.0=305.0K

T_2 = final temperature of gas = -11.7^oC=273-11.7=261.3K

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

\frac{0.995\times 3.93\times 10^4}{305.0}=\frac{0.720\times V_2}{261.3}

V_2=4.65\times 10^4L

Thus the volume of the balloon at that new location is 4.65\times 10^4L

4 0
3 years ago
What is the molecular shape and bond angle at the indicated carbon?
aliina [53]

Answer:

bond angles of 120 degrees.

7 0
3 years ago
You have 2 moles of NaOH how many molecules of NaOH?
kaheart [24]

Answer:

12.044 X 10^23 molecules of NaOH

Explanation:

because NaOH is an ionic bond, we should be asking how many <em>formula units </em> are in 2 moles of NaOH, there are 0 molecules since NaOH is measured in formula units.

but for the sake of the problem I'll assume NaOH is measured in molecules

for every mol of something there are 6.022 X 10^23 of something of that something.

so there are 6.022 X 10^23 molecules for every mol of NaOH

that means we have 2 X 6.022 X 10^23 molecules in 2 moles of NaOH = 12.044 X 10^23 molecules of NaOH

4 0
3 years ago
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