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icang [17]
3 years ago
11

Helllppp meee!! Please

Chemistry
2 answers:
Mashcka [7]3 years ago
8 0
I believe it’s C I might be wrong
neonofarm [45]3 years ago
3 0

Answer:

a bus moves on a straight road then makes a right turn

Explanation:

yes

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What is oxydation number of s for H2S ? ( hydrogen sulphide )​
siniylev [52]

Answer:

the oxidation number is zero because H=+1. S=-2

Explanation:

so two hydrogen and one sulphur so total no is zero

4 0
3 years ago
6 NH4Cl<br> How many hydrogen atoms are shown?
kvasek [131]

Answer:

24

Explanation:

6*4=24

4 0
3 years ago
What is the purpose of control set up
Archy [21]
The purpose<span> of preparing </span>Set-up<span> _ is to act as a </span>control set-up<span> to ensure that the (measured variable) is only caused by the(changed variable) and not any other variables in the experiment.</span>
3 0
4 years ago
How many moles of CaO will be produced from 23.9 g of Ca?<br>2Ca(s) + O2(g) – 20:0(3)<br>mol​
inessss [21]

Answer:

0.6 moles of CaO will produced.

Explanation:

Given data:

Mass of calcium = 23.9 g

Moles of CaO produced = ?

Solution:

Chemical equation:

2Ca + O₂ → 2CaO

Number of moles of calcium:

Number of moles = mass/ molar mass

Number of moles = 23.9 g / 40 g/mol

Number of moles = 0.6 mol

Now we will compare the moles of calcium and CaO.

            Ca         :          CaO

              2          :          2

            0.6         :        0.6

 0.6 moles of CaO will produced.

4 0
3 years ago
Question 1<br> Review<br> Which laboratory equipment is correctly paired with the unit it measures?
Bad White [126]

Answer:

Cilindros graduados

Explanation:

Son una herramienta de medición primaria para el volumen de un líquido, y tiene varias marcas hacia arriba y hacia abajo a lo largo del contenedor con incrementos específicos. Los cilindros graduados vienen en muchos tamaños; entre más pequeños sean de diámetro, más específicas serán las mediciones de volumen. Al leer el volumen de un cilindro graduado, notarán que el líquido parece tener una muesca; el líquido alrededor de los bordes será más alto que el líquido en el centro, inclinándose hacia abajo como los lados de un trampolín cuando alguien está parado en el medio. Esto se llama el menisco. Alineen el punto más bajo del menisco con la marca más cercana, manteniendo el nivel del cilindro para leer correctamente el volumen.

6 0
3 years ago
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