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3 years ago

11

How do astronomers explain the formation of the milky way galaxy

1 answer:

nadezda [96]3 years ago

3 0

Galaxy Formation. One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies.

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Which organ detects stimuli from the environment and is part of the nervous system?

sleet_krkn [62]

It's the eye because it's the organ of sight

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3 years ago

What type of bond is NH3?<br> Ionic, Polar covalent, nonpolar covalent, or metallic

laila [671]

Polar covalent because it is 2 nonmetals and the molecule has a net dipole movement.

8 0

3 years ago

PLEASE HELP When I combine Sprite with a sour candy, it starts to bubble a lot. Is this a physical or chemical change?

maksim [4K]

Answer:

B. chemical

Explanation:

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4 0

2 years ago

Read 2 more answers

A 10.0 mL sample of HNO3 was exactly neutralized by 13.5 mL of 1.0 M KOH. What is the molarity of the HNO3? Use the titrations f

Kruka [31]

Answer: Thus molarity of $HNO_3$ is 1.35 M

Explanation:

To calculate the volume of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $HNO_3$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=1\\M_1=?M\\V_1=10.0mL\\n_2=1\\M_2=1.0M\\V_2=13.5mL$

Putting values in above equation, we get:

$1\times M_1\times 10.0=1\times 1.0\times 13.5\\\\M_1=1.35M$

Thus molarity of $HNO_3$ is 1.35 M

7 0

3 years ago

When the equation below is balanced, what is the coefficient for oxygen?<br> C3H8+O2=CO2+H2O

Nataly [62]

Se for no balanceamento e 5.

5 0

3 years ago