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3 years ago

Cesio es metal o no metal?

Chemistry

2 answers:

UNO [17]3 years ago

8 0

Answer:

Explanation:

N76 [4]3 years ago

6 0

Answer:

Es un METAL ALCALINO

Explanation:

Elemento químico de número atómico 55, masa atómica 132,91 y símbolo Cs ; es un metal alcalino de color blanco plateado y blando, que se extrae de algunos minerales, se inflama en contacto con el aire, se utiliza en las células fotoeléctricas y sus isótopos radiactivos se emplean en investigaciones medicinales e industriales.

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What does a high number on the pH scale say about a solution?

erik [133]

Explanation:

A is cortect answer dsfa

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2 years ago

Using the reaction below: 2 CO2(g) + 2 H2O(l) → C2H4(g) + 3 O2(g) ΔHrxn= +1411.1 kJ What would be the heat of reaction for this

maw [93]

Answer: d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

$2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g)$ $\Delta H=+1411.1kJ$

Reversing the reaction, changes the sign of $\Delta H$

$C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)$

$\Delta H=-1411.1kJ$

On multiplying the reaction by $\frac{1}{2}$ , enthalpy gets half:

$0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)$ $\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol$

Thus the enthalpy change for the given reaction is -705.55kJ

7 0

3 years ago

Ocean tides observed at coastal locations each day are primarily caused by what?

Andru [333]

Ocean tides are caused by mostly wind but can also be caused by earthquakes

4 0

3 years ago

Read 2 more answers

In the name carbon dioxide what does the prefix of the second word indicate about a molecule of a dioxide A. It has two carbon a

brilliants [131]

Answer:

The answer is option B, that is, it has two oxygen atoms.

5 0

2 years ago

2 Points

inessss [21]

Answer: D is the correct answer

Explanation: When there is no insulator surrounding a metal wire then there is nothing to stop the electrons from flowing outside of the wire, This means that anything the wire comes in contact with could get shocked or burnt when there is a current flowing through the wire.

7 0

3 years ago