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3 years ago

Question 6 I need help

Chemistry

1 answer:

avanturin [10]3 years ago

5 0

The answer is zero also I suggest googling the questions there is a quizlet with the answers

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Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in amm

9966 [12]

Answer: Option E. There are covalent bonds between the hydrogen atoms

Explanation:

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3 years ago

7. The picture below shows a girl with a widow's peak. Widow's peak She has a widow's peak because of her -

Akimi4 [234]

Answer:

genes (c)

Explanation:

since traits are passed down genetically, so her mother or father must have one (or even one of her grandparents)

hope this helps!:)

3 0

1 year ago

Read 2 more answers

Please help thaank youu

krek1111 [17]

First, let's start off by finding the mass of this whole hydrate.
(Note: the unit of measurement for mass will be amu)

Let's find the molecular mass of each element.
$Co=58.933$
$Cl=35.45$
$H=1.008$
$O=15.999$

Now, let's find the mass of each compound.

$CoCl_2=58.933+2(35.45)=129.833$
$H_2O=2(1.008)+15.999=18.015$

We have 6 molecules of H2O, so multiply 18.015 by 6 then add that with the weight of CoCl2.

$6(18.015)=108.09$
$129.833+108.09=237.923$

Now divide 108.09 (mass of all the H2O in the hydrate) by 237.923 (total mass of hydrate).

$\dfrac{108.09}{237.923}$

$\approx0.45431$

Turn that into a percentage and you get 45.431%.
Hope this helps! :)

6 0

2 years ago

For the following questions, use a periodic table and your atomic calculations to find the unknown information about each isotop

mafiozo [28]

Answer:

Option B is correct.

Explanation:

We know that an atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example, if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

In given problem we are given with 2 neutrons of helium. We know that the atomic number of He is 2. Thus Mass number of He is,

Number of neutrons + number of proton

2 + 2 = 4

Thus, option B is correct.

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3 years ago

What should be included in a science conclusion

QveST [7]

A science conclusion should simply have a statement identifying whether your experiment’s aim turned out to be true or false

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1 year ago