(10th grade adv chem dimensional analysis 1)

To find the mass of Ca(NO3)2 you would add up ___ Calcium, ___ Nitrogens, and ___ Oxygens.

Varvara68 [4.7K]

The answer for the following answer is mentioned below.

Therefore the mass of calcium nitrate ( $Ca(NO_{3} )_{2}$

Explanation:

To find the mass of calcium nitrate ( $Ca(NO_{3} )_{2}$ ) is :

No of calcium are 1

No of nitrogen are 2

No of oxygen are 6

$( NO_{3} ){2}$ = $N_{2} O_{6}$

So therefore;

No of nitrogen are 2

No of oxygen are 6

Mass of ( $Ca(NO_{3} )_{2}$ ) :

molecular mass of calcium =40

molecular mass of nitrogen = 14

molecular mass of oxygen = 16

$N_{2} O_{6}$ = (14×2) + (16×6)

= 28 + 96

= 124

$Ca(NO_{3} )_{2}$ = 40 + 124

$Ca(NO_{3} )_{2}$ = 164 grams

Therefore the mass of calcium nitrate ( $Ca(NO_{3} )_{2}$ ) is 164 grams

3 0

3 years ago

Who know the answer

bekas [8.4K]

First, let's explain the variables. F means force, m means mass, and a means acceleration. F is measured in Newotns [N], mass is measured in kilograms [kg], and acceleration in measured in meters per squared second [m/s²].

Now let's mover on the first problem.

Given

m = 1000 kg

a = 3 m/s²

According to the second law of Newton, the force is equal to the acceleration multiplied by the mass.

$F = am\\F = 3 * 1000\\F = 3000 N$

The answer is 3000 N.

The second problem is smiliar.

Given

m = 70 kg

F = 250 N

We use the same formula from before, and use a bit of algebra to adapat it to our needs.

$F = ma\\\frac{F}{m} = a\\a = \frac{F}{m}\\a = \frac{250}{70} \\a = 24\frac{1}{7} m/s^{2}$

The answer is 24 1/7 s/m^2.

6 0

4 years ago

A fisher is a small but ferocious predator that feeds on mice, chipmunks, young deer foals, and porcupines. Which of the followi

anzhelika [568]

A. a wide variety of hunting techniques

Explanation:

To help the fisher population to survive in a changing environment, they have to develop a wide variety of hunting techniques.

The new fisher population have to develop a wide range of strategies to satisfy its carnivorous instincts.

Most predators are carnivores with a wide range of hunting skills
They must be fast, subtle, good sighted and well adapted body part to hunt of preys.
As they transcends different environments, they must have good and diverse hunting skills to give them a competitive advantage.

Learn more:

Animal domestication brainly.com/question/3807452

#learnwithBrainly

5 0

3 years ago

How many atoms is 45 moles of silicon (Si)?

TEA [102]

I think it’s 270.9. Hope this help

8 0

3 years ago

Which equation represents a change that results in an increase in disorder?(1 ) I2(s)=>I2(g)

ankoles [38]

Answer : The correct option is, (1) $I_2(s)\rightarrow I_2(g)$

Explanation :

Entropy : It measures the disorderedness or randomness of the molecule.

That means higher the disorderedness, higher will be the entropy.

As we are going from solid state to liquid state, liquid state to gaseous state, the disorderedness increases due to the less inter-molecular interaction between the molecules.

And, as we are going from gaseous state to liquid state, liquid state to solid state, the disorderedness decreases due to the more inter-molecular interaction between the molecules.

(1) $I_2(s)\rightarrow I_2(g)$

In this reaction, the disorderedness increases because the state changes from solid to liquid.

(2) $CO_2(g)\rightarrow CO_2(s)$

In this reaction, the disorderedness decreases because the state changes from gaseous to solid.

(3) $2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)$

In this reaction, the disorderedness decreases because the state changes from gaseous to solid.

(4) $2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

In this reaction, the disorderedness decreases because the state changes from gaseous to liquid.

Hence, the correct option is, (1) $I_2(s)\rightarrow I_2(g)$

8 0

3 years ago

Read 2 more answers