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4 years ago

Can forces can be combined true or false

1 answer:

7 0

Theoretically, You can calculate the combined force, which is known as "Net force", in real life, combination of force does make sense only when you're talking about their addition [ which must be in same direction ]

Hope this helps!

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What is the passage from the mouth to the larynx and esophagus?

Paladinen [302]

The answer is the trachea

6 0

4 years ago

CaF2 + (NH4)2O --> 2 NH4F + CaO How many grams of NH4F can be formed from 34.6 grams of CaF2? (AKS 4f)

bixtya [17]

Answer:

32.83 grams of NH₄F can be formed from 34.6 grams of CaF₂

Explanation:

The balanced reaction is:

CaF₂ + (NH₄)₂O ⇒ 2 NH₄F + CaO

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following quantities participate in the reaction:

CaF₂: 1 mole
(NH₄)₂O: 1 mole
NH₄F: 2 mole
CaO: 1 mole

Being the molar mass of the compounds:

CaF₂: 78 g/mole
(NH₄)₂O: 52 g/mole
NH₄F: 37 g/mole
CaO: 56 g/mole

Then by stoichiometry, the following amounts of mass participate in the reaction:

CaF₂: 1 mole* 78 g/mole= 78 g
(NH₄)₂O: 1 mole* 52 g/mole= 52 g
NH₄F: 2 mole* 37 g/mole= 74 g
CaO: 1 mole* 56 g/mole= 56 g

You can apply the following rule of three: if 78 grams of CaF₂ form 74 grams of NH₄F by stoichiometry, 34.6 grams of CaF₂ will form how much mass of NH₄F?

$mass of NH_{4} F=\frac{34.6 grams of CaF_{2} *74 grams ofNH_{4} F}{78grams of CaF_{2} }$

mass of NH₄F= 32.83 grams

<u><em>32.83 grams of NH₄F can be formed from 34.6 grams of CaF₂</em></u>

5 0

3 years ago

Calculate the mass percentage of Na2SO4 in a solution containing 10.9 g Na2SO4 in 482 g water.

boyakko [2]

Answer:

The answer to your question is 2.21 %

Explanation:

Data

mass of Na₂SO₄ = 10.9 g

mass of H₂O = 482 g

Formula

Percent by mass = $\frac{mass of solute}{total mass}$ x 100

Substitution

$Percent by mass = \frac{10.9}{10.9 + 482}$ x 100

Simplification and result

$Percent by mass = \frac{10.9}{492.9}$ x 100

Percent by mass = 0.022 x 100

Percent by mass = 2.21

3 0

4 years ago

Read 2 more answers

What is the difference between a proton, neutron, and electron?

jok3333 [9.3K]

Answer:

proton :

a particale or atom containing a postive charge

nuutron

a particale or atom that contains a negative charge

electron :

a particale or atom with a negative chrage.

Explanation:

proton:

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

nuetron:

a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

elcetron:

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

7 0

3 years ago

Write the balanced equation for the ionization of the weak base pyridine, c5h5n , in water, h2o. Phases are optional.

Lelu [443]

The balanced equation for the ionization of the weak base pyridine,C5H5N in water, H2O

C_5H_5N ( aq.) + H2O ( l) ---------> C5H5NH+ (aq.) + OH- (aq.)

<h3>What is the balanced equation for the ionization?</h3>

Generally, Pyridine is characterized by a ring structure, in this characteristic ring structure N is sp2 hybridized, hence creating a lone pair present on N so s - character is more, as well as lone pair, is present.

Therefore, Considering The following functions of the equation:weak base pyridine,C5H5N in water, H2O

We write the balanced equation for the ionization as

C_5H_5N ( aq.) + H2O ( l) ---------> C5H5NH+ (aq.) + OH- (aq.)