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3 years ago

Can someone answer 3’for me please?

Chemistry

2 answers:

abruzzese [7]3 years ago

6 0

b is the correct answer

Nimfa-mama [501]3 years ago

5 0

The correct is B, the ball in her hands has potential energy. When it falls, the potential energy changes to kinetic energy.

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Chemical composition and function of iodized salt

Nutka1998 [239]

Answer:

What is the chemical composition of iodized salt?

Iodized salt is a very cheap and good way of getting the necessary iodine. Ordinary table (cooking) salt is a chemical compound called "sodium chloride" (its chemical formula is NaCl). "Sodium iodide" (NaI) is added to the NaCl to make iodized salt.

Salt that has been iodized contains trace levels of sodium or potassium iodide. It's just regular salt sprinkled with potassium iodate. It has the same appearance and flavor! The bulk of table salt used currently is iodized, which has a number of advantages.

function of iodized salt
Iodized salt aids in the production of hormones that control heart rate and blood pressure. It also aids in the burning of unwanted fat deposits that may lead to heart disease. Salt maintains a healthy amount of hydration and electrolyte balance.

7 0

2 years ago

what is the new pressure acting on a 2.5 l balloon if its original volume was 5.8 l at 3.7 ATM of pressure

Ivan

Answer : The new pressure acting on a 2.5 L balloon is, 8.6 atm.

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$

or,

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure = 3.7 atm

$P_2$ = final pressure = ?

$V_1$ = initial volume = 5.8 L

$V_2$ = final volume = 2.5 L

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

$3.7atm\times 5.8L=P_2\times 2.5L$

$P_2=8.6atm$

Thus, the new pressure acting on a 2.5 L balloon is, 8.6 atm.

8 0

4 years ago

For the following aqueous reaction, complete and balance the molecular equation and write a net ionic equation, making sure to i

lozanna [386]

Answer :

The complete net ionic equation is :

$2OH^-(aq)+2H^+(aq)\rightarrow 2H_2O(l)$

Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The balanced molecular equation will be,

$Ca(OH)_2(aq)+2HNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+2H_2O(l)$

The complete ionic equation in separated aqueous solution will be,

$Ca^{2+}(aq)+2OH^-(aq)+2H^+(aq)+2NO_3^{-}(aq)\rightarrow Ca^{2+}(aq)+2NO_3^{-}(aq)+2H_2O(l)$

In this equation the species, $Ca^{2+}^\text{ and }NO_3^{-}$ are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The complete net ionic equation is:

$2OH^-(aq)+2H^+(aq)\rightarrow 2H_2O(l)$

7 0

3 years ago

CH4 + O2 → CO2 + H2O what is the balacnced chemical reaction

adelina 88 [10]

Answer:

The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants

4 0

3 years ago

Carbon is found in all organic molecules. <br> a. True<br> b. False

VARVARA [1.3K]

Yes because an organic compound is any member of large class of gaseous liquid or solid chemical compound whose molecules contains carbon

8 0

3 years ago