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Aleksandr [31]
2 years ago
6

thủy phân hoàn toàn 11,44 gam este no,đơn chức , mạch hở X với 100ml dung dịch NaOH 1,3M ( vừa đủ ) thu được 5,98 gam một ancol

Y. Tên gọi của X là gì ?
Chemistry
1 answer:
Yakvenalex [24]2 years ago
8 0

Answer:

bat ting so it rit now

Explanation:

pohvcvbjbv

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A 45.0 g sample of a metal at 85.6 °C is placed in 150.0 g of water at 24.6 °C. The final temperature of the system is 28.3 °
earnstyle [38]

Answer:

904.014 j/kgk

Explanation:

Mass of metal = 45g

Temperature of metal = 85.6°

Mass of water = 150

Temperature of water = 24.6

Final temperature of system = 28.3

Heat lost by metal = Heat gained by water

m1 * c1 * dt = m2 * c2 * dt

Q = quantity of heat

Q = m*c*dt

dt = change in temperature

dt of water = 28.3 - 24.6 = 3.7

dt of metal = 85.6 - 28.3 = 57.3

Specific heat capacity of water, c = 4200

(45 * 10^-3) * c * 57.3 = (150 * 10^-3) * 4200 * 3.7

2.5785c1 = 2331

c1 = 2331 / 2.5785

= 904.01396

= 904.014 j/kgk

3 0
3 years ago
What is the density of a substance that weighs 100g and has a volume of 68cm3?
exis [7]
D= mass/volume so it's 100/68 which equals 1.47cm3
4 0
3 years ago
Which word(s) below is represented by the word “period” on the periodic table?
Bogdan [553]
A believe it’s called a “group”

Correct me if I’m wrong!
3 0
3 years ago
Read 2 more answers
Cómo se denomina el calor que ponen en juego los sistemas materiales cuando cambian su temperatura? Seleccione una: a. Calor cin
Law Incorporation [45]

Answer:

La respuesta correcta es: b. Calor sensible

Explanation:

Al absorber calor, un sistema puede: aumentar su temperatura o cambiar de fase (es decir, pasar de un estado de agregación a otro). Los cambios de fase se producen a temperatura constante, por lo que el calor involucrado se denomina calor latente. Por ejemplo, cuando el agua líquida pasa a vapor por calentamiento a la temperatura de ebullición, esta temperatura se mantiene constante hasta que toda la masa de agua pasa al estado vapor. En cambio, cuando el sistema absorbe calor cambiando su temperatura pero permaneciendo en el mismo estado de agregación (por ejemplo, cuando calentamos agua líquida por debajo de la temperatura de ebullición), el calor involucrado se denomina calor sensible.

6 0
3 years ago
How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 4.14 g
Neko [114]

Answer:

Explanation:

Given that:

The mass of sodium crystal = 4.14 g

As a result, the number of atoms in the sodium crystal is:

=4.14 \g \times \dfrac{ 1 \ mol}{23.0 \ g }\times \dfrac{6.023 \times 10^{23} \ atoms}{1 \ mol}

= 1.084 × 10²³ atoms

In the valence orbital of the sodium atom, there is just one electron.

As a result, the number of molecular orbitals produced by these atoms is= 1.084 × 10²³ molecular orbital

Because valence bands are created from occupied molecular orbitals, the number of valence bands created from the aforementioned molecular orbitals is:

= \dfrac{ 1.084 \times 10^{23}}{2}

= 5.420 × 10²² orbitals.

6 0
3 years ago
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