All categories

3 years ago

Hey please help me in this.....

Chemistry

1 answer:

Brilliant_brown [7]3 years ago

3 0

Answer:

5.Hey Order of reaction is :-

Y>Z>X

6.Phosphorus is soft, waxy and reactive. It reacts with moist air and gives out light. It ignites spontaneously at about 350C and that's why it is stored under kerosene to prevent its reaction in the atmosphere.

it can be also stored in sealed bottles..

Explanation:

mark me as brainliest ❤️

You might be interested in

Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of

daser333 [38]

Answer:

Yes. The two elements can combine to form different compounds.

Explanation:

Two elements can combine at different ratios.

Consider CO and CO₂. Both are made from carbon and oxygen. However, C and O combine at a 1:1 ratio in CO but at a 1:2 ratio in CO₂. CO is a fuel; it burns in the air. CO₂ does not burn in the air; it is used to put out fires and is found in extinguishers. CO and CO₂ are two distinct compounds.

There are many ways for the elements to combine with each other. As a result, the first twenty elements on the periodic table alone can produce a large number of compounds.

6 0

3 years ago

Metamorphic rock is formed from the weathering, erosion and cementing of sediments.

Alex Ar [27]

Answer:

False

Explanation:

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

This question is reffering to sedimentary rocks, so it's false.

3 0

3 years ago

Read 2 more answers

What is the charge of Cl2?

Studentka2010 [4]

Answer:

Cl2 does not have any charge

Explanation:

But when it is present in its ionic form then chlorine have -1 charge on it. But charge on chlorine varies from -1 to +7

8 0

3 years ago

What is the atomic number of carbon?

7nadin3 [17]

Atomic number of an element is the number of protons present in that element. It is unique for each element. The atomic number of carbon is 6.

5 0

3 years ago

In the reaction below 25.00 g of MnC1, is reacted with 100.0 g of PbO2, excess KCl, and excess

HACTEHA [7]

Answer:

31.44 g KMnO4

Explanation:

M(MnCl2) = M(Mn) + 2M(Cl) = 54.9 + 2*35.5 =125.9 g/mol

25.00 g /125.9 g/mol =0.1990 mol MnCl2

M(PbO2) = M(Pb) + 2M(O2) = 207.2 +2*16.0 =239.2 g/mol

100g/139.2 g/mol = 0.7184 mol PbO2

2 KCl + 2 MnCl2 + 5 PbO2 + 4 HCl → 2 KMnO4 + 5 PbC12 + 2 H2O

from reaction 2 mol 5 mol

given 0.1990mol 0.7184 mol

for 2 mol MnCl2 ----- 5 mol PbO2

for 0.1990 mol MnCl2 ---- x mol PbO2

x = (0.1990 *5)/2 = 0.4975 mol PbO2

So, for 0.1990 MnCl2 we need 0.4975 mol PbO2, but we have 0.7184 mol PbO2. That means that we have excess of PbO2, and we are going to use for further calculation 0.1990 mol MnCl2

2 KCl + 2 MnCl2 + 5 PbO2+ 4 HCl → 2 KMnO4 + 5 PbC12 + 2 H2O

from reaction 2 mol 2 mol

given 0.1990 mol

gotten 0.1990 mol

We got 0.1990 mol KMnO4.

M(HMnO4) = M(K) + M(Mn) +4M(O) = 158.0 g/mol

m(KMnO4) = 0.1990 mol*158.0 g/mol = 31.44 g

7 0

3 years ago