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2 years ago

Pls solvequestion attached as image

Chemistry

1 answer:

patriot [66]2 years ago

8 0

Answer:

a) formula for citric acid is - C6 H8 o7

b) lime water turns opaque after adding co2 due to the formation of calcium carbonate.

c) reaction 3 is displacement reaction where a high reactive metal displace a less reactive from its salt solution.

d) reaction 1) is combination reaction where two reactant combines to give a single product whereas reaction 2) is decomposition reaction where a single reactant splits into more that 1 products.

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How many moles are in 1.23 X 1050 atoms of calcium carbonate, CaCO3?

pav-90 [236]

Answer:

Explanation:1 mole is equal to 1 moles CaCO3, or 100.0869 grams.

8 0

2 years ago

What reaction type is depicted by the following equation? 2C2H2 + 5O2 4CO2 + 2H2O

Nonamiya [84]

The answer is combustion

3 0

3 years ago

In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.

mamaluj [8]

Answer:

Explanation:

We know that the

reaction catalyzing power of a catalyst ∝ surface area exposed by it

Given

volume V1= 10 cm^3

⇒ $\frac{4}{3} \pi r^3= 10$

hence r= 1.545 cm

also, surface area S1= $4\pi r^2$

now when the sphere is broken down into 8 smaller spheres

S2= 8×4πr'^2

now, equating V1 and V2 ( as the volume must remain same )

$\frac{4}{3}\pi r^3=8\times\frac{4}{3} \pi r'^3$

and solving we get

r'= r/2

therefore, S2= $8\times4\pi\frac{r}{2}^2$

S2= $2\times4\pi r^2$

S2= 2S1

hence the correct answer is

. The second run has twice the surface area.

8 0

3 years ago

Apart from cases of nuclear processes (including fission), elements cannot be broken down to form other substances.

Shtirlitz [24]

Explanation:

Element is ur answer

hope it helps u

plz mark as brainlist

7 0

3 years ago

Which of these characteristics do these elements have in common?

Over [174]

C) They each form similar compounds when combined with oxygen.

Explanation:

The given elements have a common characteristics as they each form similar compounds when combined with oxygen.

Beryllium, magnesium and calcium all are located in the alkaline earth group.

Elements in the same group have the same chemical properties.

Density and melting point are physical properties of matter which varies down a group on the periodic table.
Their reaction with oxygen denotes a statement of their chemical properties.
Chemical properties of matter is a function of their valency.
Group two elements have a valency of two. They have two electrons in their outermost shell.
Therefore, they all form ionic bonds when they react with oxygen.

learn more:

Periodic table brainly.com/question/2690837

#learnwithBrainly

6 0

2 years ago

Pls solvequestion attached as image​

Pls solvequestion attached as image