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3 years ago

As we move from left to right across the periodic table, what is the general trend?

Chemistry

2 answers:

nignag [31]3 years ago

8 0

Answer:

electronegtivity increases

Explanation:

a p e x

Montano1993 [528]3 years ago

4 0

Answer:

Each element is made of more atoms

Explanation:

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Which of the following is a type of cell organelle?

icang [17]

Answer:

C . Dna

Explanation:

8 0

3 years ago

How many grams of sugar must be dissolved in 150 ML of water to make a solution that has a concern traction of .6 g/ml

grandymaker [24]

Hey there!:

Density = 0.6 g/mL

Volume = 150 mL

Mass = ?

therefore:

D = m / V

0.6 = m / 150

m = 0.6 x 150

m = 90.0 g of sugar

Hope this helps!

5 0

3 years ago

What type of reaction is this: 2CaO - 2Ca + O2

ruslelena [56]

Answer:

White or gray, odorless lumps or granular powder.

8 0

3 years ago

An oxygen molecule consists of two oxygen atoms, (O2), whose total mass is 5.3 × 10–26 kg and whose moment of inertia about an a

Katena32 [7]

Answer : The distance between the two atoms is $1.2\times 10^{-10}m$

Explanation :

The The formula used for moment of inertia for one atom is:

$I=(\frac{m}{2})r^2$

The formula used for moment of inertia for two atom is:

$I=2(\frac{m}{2})r^2$

where,

I = moment inertia = $1.9\times 10^{-46}kg.m^2$

r = distance of atom from axis of rotation

m = mass of atom = $5.3\times 10^{-26}kg$

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

$I=2(\frac{m}{2})r^2$

$1.9\times 10^{-46}kg.m^2=2(\frac{5.3\times 10^{-26}kg}{2})r^2$

$r=6.0\times 10^{-11}m$

Now we have to calculate the distance between the two atoms.

Formula used :

$d=2r$

where,

d = distance between the two atoms

$d=2\times 6.0\times 10^{-11}m=1.2\times 10^{-10}m$

Therefore, the distance between the two atoms is $1.2\times 10^{-10}m$

3 0

4 years ago

A sealed piston contains 400 mL of air at standard ambient pressure. The piston is

nydimaria [60]

Answer:

324.24 kPa

Explanation:

Given that;

Initial pressure P1 = 101325 Pa

V1= 400 ml

P2 = ?

V2= 125mL

From Boyle's law;

P1V1 = P2V2

P2 = P1V1/V2

P2= 101325 × 400/125

P2= 324.24 kPa

5 0

3 years ago