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3 years ago

A bird sits on her eggs to keep them warm

Chemistry

1 answer:

Troyanec [42]3 years ago

5 0

Answer:

This would be Conduction

Explanation:

Conduction is the transfer of heat between two surfaces in contact with each other like the bird and the eggs.

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What is polymeric chemistry?

Papessa [141]

Answer:

It is the branch of chemistry that deals specially with the study of polymerization and the products obtained through the process of polymerization such as plastics,synthetic fibers,papers e.t.c.

Explanation:

5 0

3 years ago

Hydroxylamine hydrochloride is a powerful reducing agent which is used as a polymerization catalyst. It contains 5.80 mass % H,

nika2105 [10]

Answer: The molecular formula will be $H_{16}NOCl$

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of H = 5.80 g

Mass of N = 20.16 g

Mass of O = 23.02 g

Mass of Cl = 51.02 g

Step 1 : convert given masses into moles.

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{5.80g}{1g/mole}=5.80moles$

Moles of N = $\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{20.16g}{14g/mole}=1.44moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{23.02g}{16g/mole}=1.44moles$

Moles of Cl = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{51.02g}{35.5g/mole}=1.44moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For H = $\frac{5.80}{1.44}=4$

For N = $\frac{1.44}{1.44}=1$

For O = $\frac{1.44}{1.44}=1$

For Cl = $\frac{1.44}{1.44}=1$

The ratio of H: N: O: Cl= 4: 1: 1: 1

Hence the empirical formula is $H_4NOCl$

The empirical weight of $H_4NOCl$ = 4(1)+1(14)+ 1(16) + 1(35.5)= 69.5 g.

The molecular weight = 278 g/mole

Now we have to calculate the molecular formula.

$n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{278}{69.5}=4$

The molecular formula will be= $4\times H_4NOCl=H_{16}NOCl$

7 0

3 years ago

For the reaction at equilibrium: 2 NO(g) + O2(g) → 2 NO2(g) Which change will increase the amount of NO2(g)? a. Remove NO gas b.

MAVERICK [17]

Answer:

b. Add NO gas

Explanation:

According with Le Chatelier´s principle, when a reactant is added the equilibrium is displaced to the product(s), to achieve the equilibrium again. Therefore, if NO is added in the reaction, it will be produced more of NO2(g).

3 0

4 years ago

Which of the following statements are TRUE?I. Models are always wrong unless they are proved by a theoryII. Elements, such as le

BartSMP [9]

Answer:

II and IV.

Explanation:

I. (INCORRECT). A model is a tentative to determinate a thing that can't be proved, and it's made based on evidence. If the model can explain the observation in nature, it is considered right, although it can be proved by a theory.

II. (CORRECT). The most accepted model of atoms says that they're formed by tiny particles, protons, neutrons, and electrons, with the first two on the nucleus, and the other surrounding it in an open space.

III. (INCORRECT). A heterogeneous mixture is a mixture of substances that is possible to identify phases of them, such as in oil and water. In the air, isn't possible to identify the constituents, and it's a homogeneous mixture.

IV. (CORRECT). Silver has atomic number 47, which is its number of protons. The atomic mass is the sum of protons and neutrons, so the number of neutrons is 108 - 47 = 61.

5 0

4 years ago

**PLEASE ANSWER QUICK, I'LL GIVE BRAINLIEST TO THE RIGHT ANSWER !!**

rewona [7]

Answer:

Explanation:

the correct answer would be answer c

6 0

2 years ago