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3 years ago

I need help. ASAP! Look at the picture below.

Chemistry

1 answer:

valina [46]3 years ago

4 0

From the group I A of the periodic table of the element can the chemist infer the element.

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Using the Periodic Table, predict which elements will have similar chemical properties or reactivity

tekilochka [14]

Answer:

Elements in the same vertical column on the periodic table will have similar chemical properties and behave similarly in chemical reactions. These vertical columns can also be called groups/families.

Explanation:

6 0

3 years ago

N yogurt de 125 g muestra en su etiqueta el contenido de algunas de sus sustancias nutricionales:¿Cuál es la composición en tant

poizon [28]

Answer:

Sustancia Masa (g) Composición (% m/m)

Proteínas 5,5 4,4

Azúcares 5,0 4,0

Sodio 0,06 0,048

Potasio 0,15 0,12

Explanation:

Para calcular la composición porcentual en masa de las sustancias debemos usar la siguiente ecuación:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100$

En donde:

$m_{s}$ es la masa de la sustancia

$m_{sol}$ es la masa del yogurt = 125 g

Para las proteínas:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100 = \frac{5,5 g}{125 g} \times 100 = 4,4 \%$

Para los azúcares:

$\%_{m/m} = \frac{5,0 g}{125 g} \times 100 = 4,0 \%$

Para el sodio:

$\%_{m/m} = \frac{0,06 g}{125 g} \times 100 = 0,048 \%$

Para el potasio:

$\%_{m/m} = \frac{0,15 g}{125 g} \times 100 = 0,12 \%$

Espero que te sea de utilidad!

6 0

3 years ago

HELP! An atom of vanadium

Zigmanuir [339]

An atom of vanadium (V) has 23 electrons.

Given :

A vanadium (V) atom with 23 protons and has a net charge of 0.

To find:

The number of electrons in a vanadium atom

Solution:

Number of protons in vanadium atom = 23

The 0 net charge on the atom indicates that the atom has an equal number of protons and electrons which makes it a neutral atom.

Number of electrons in vanadium atom = Number of protons in vanadium atom = 23

An atom of vanadium (V) has 23 electrons.

Learn more about subatomic particles here:

brainly.com/question/7221719?referrer=searchResults

brainly.com/question/489853?referrer=searchResults

6 0

3 years ago

Chemical energy is released when bonds blank in a chemical reaction

Afina-wow [57]

Answer:

form

Explanation:

4 0

3 years ago

Lab 27. stoichiometry and chemical reactions: which balanced chemical equation best represents the thermal decomposition of sodi

Cloud [144]

Answer:
Sodium Bicarbonate on decomposition produces Carbon dioxide gas and Water vapors.

 2 NaHCO₂ → Na₂CO₃ (s) + CO₂ (g) + H₂O (g)

Explanation:
Let suppose you burn 168 g ( 2 moles ) of NaHCO₃, a gas will produced and product is left behind. On measuring the product formed it will be almost equal to 105 g. This shows that the product is Na₂CO₃ and 1 mole of it is being produced after decomposition of sodium bicarbonate.

5 0

3 years ago