Identifica los elementos y la cantidad de átomos de cada uno qué hay en la fórmula de los siguientes compuestos

shtirl [24]

science of love

,EXPLANATION:

The initial happy feelings of being in love is stimulated by 3 chemicals in the brain: noradrenaline that stimulates adrenaline production causing that racing heart and sweaty palms; dopamine, the feel-good chemical; and phenylethylamine that is released when we're near our crush, giving us butterflies in our tummies.

hope this will help u..and plz mark this as brainliest

6 0

2 years ago

Which of the following samples has the greatest population density? a. 125,000 organisms in 2.5 mi2028-02-04-03-00_files/i017000

Mazyrski [523]

The answer is D i just took the test

6 0

3 years ago

Read 2 more answers

What heavier element is created when hydrogen atoms fuse together in the sun’s core?

sergey [27]

Answer:

Helium is created from hydrogen in the sun's core.

Four hydrogen-1 nuclei fuse to produce

one helium-4 nucleus, two neutrons,
two positrons, and
two electron neutrinos.

Explanation:

Step One:

${\rm ^1_1 H + ^1_1 H\to ^2_1 H + e^{+}} + v_e$ .

Two hydrogen-1 nuclei fuse. One proton will convert to a neutron. The products will be

one hydrogen-2 nucleus,
one positron, and
one electron neutrino.

Step Two:

$\rm ^1_1 H +^2_1 H \to ^3_2 He$ .

There are plenty of hydrogen-1 nuclei available in the core of the sun. The hydrogen-2 nucleus from step one will fuse with a hydrogen-1 nucleus. The product is

one helium-3 nucleus.

Step Three

$\rm ^3_2 He + ^3_2 He \to ^4_2 He + ^1_1 H + ^1_1 H$ .

Two helium-3 nuclei from step two react with each other. The products are:

one helium-4 nucleus, and
two hydrogen-1 nuclei.

The overall reaction will be:

${\rm 6\; ^1_1 H \to ^4_2 He + 2\; ^1_1 H+2\; e^{+}}+v_\text{e}$ .

${\rm 4\; ^1_1 H \to ^4_2 He + 2\; e^{+}} + v_\text{e}$

In other words, hydrogen nuclei in the core of the sun fuse together to form helium.

6 0

3 years ago

14. A piece of titanium at 100.0°C was dropped into 50.0 g of water at 20.0°C. The final temperature of the system was 22.6°C. W

Gemiola [76]

Answer:

$m_{Ti}=13.0g$

Explanation:

Hello,

In this case, based on the given, we can infer that as titanium is hot and water cold, it cools down whereas the water is heated up, therefore, in terms of heat, we have that the heat lost by the titanium is gained by the water:

$-Q_{Ti}=Q_{H_2O}$

That in terms of mass, specific heat and temperatures is:

$-m_{Ti}Cp_{Ti}(T_2-T_{Ti})=m_{H_2O}Cp_{H_2O}(T_2-T_{H_2O})$

In such a way, for computing the mass of titanium, considering the heat capacity of water 4.18 J/g°C, we have:

$m_{Ti}=\frac{m_{H_2O}Cp_{H_2O}(T_2-T_{H_2O})}{-Cp_{Ti}(T_2-T_{Ti})} \\\\m_{Ti}=\frac{50.0g*4.18\frac{J}{g\°C}(22.6-20.0)\°C}{-0.54\frac{J}{g\°C}*(22.6-100.0)\°C} \\\\m_{Ti}=13.0g$

Regards.

8 0

3 years ago

(2pts) Post-lab Questions (1pts) 1. Do you expect the solubility of Borax to increase or decrease as temperature increases? Sele

saw5 [17]

Answer:

1. Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger.

2. To ensure the dissolution process was at equilibrium.

Explanation:

Given that;

ΔG°= -RTlnK

and

ΔG° = ΔH° - TΔS°

So;

-RTlnK = ΔH° - TΔS°

lnK = ΔH°/-RT - TΔS°/-RT

lnK = -(ΔH°/RT) + ΔS°/R

K = e^-(ΔH°/RT) + ΔS°/R

Hence, Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger.

2.

Since solubility is an equilibrium process, it means that some undissolved solute must be present in order to determine the solubility product correctly.

6 0

3 years ago