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4 years ago

Can someone please help me with this

Chemistry

2 answers:

Alexxx [7]4 years ago

4 0

The second is the answer.

Gekata [30.6K]4 years ago

3 0

Answer:

b Mass +1 charge 0

Explanation: protons are neutral, so neutrons do not have charge

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A protein has an isoelectric point (pI) of 9. Which of the following statements best describes the state of this protein in aque

Brums [2.3K]

Answer:

The correct option is D

Explanation:

From the question we are told that

The pH of the aqueous solution is $pH = 7$

The isoelectric point is $pl = 9$

From the data given we see that the

$pH$ is below $pl$

So the protein will have a net positive charge

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4 years ago

Consider the unbalanced equation for the oxidation of aluminum. _Al + _O2 mc031-1.jpg _Al2O3 Which sequence of coefficients shou

sdas [7]

The options are
2, 3, 1
1, 3, 2
4, 3, 2
3, 2, 3

when balancing equation the masses should be balanced. In other words the same number of atoms of the same element should be on either side of the equation

the balanced equation for the oxidation of aluminium is as follows

4Al + 3O₂ ---> 2Al₂O₃
coefficients are the numbers in front of the respective compounds.
the coefficients in the correct sequence are 4,3 and 2

answer is 4, 3, 2

3 0

4 years ago

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Write 2 typical properties that are only common to transition metals

Vinil7 [7]

Answer:

Properties of transition elements

they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling points, and are good conductors of heat and electricity.

6 0

3 years ago

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Chemical formula for magnesium phosphide

TEA [102]

The chemical symbol is Mg3P2

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3 years ago

Determine the formula of chromic acid.

Katyanochek1 [597]

Answer: The formula of chromic acid is $H_2CrO_4$

Explanation:

We are given an ionic compound named as chromic acid. This acid is formed by the combination of hydrogen ion and chromate ion.

An acid is defined as the substance which releases hydrogen ion when dissolved in water.

Hydrogen is the 1st element of periodic table having electronic configuration of $1s^1$ .

This element will loose 1 electron to form $H^{+}$ ion.

Chromate ion is a polyatomic ion having chemical formula of $CrO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is $H_2CrO_4$

Thus, the formula of chromic acid is $H_2CrO_4$

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3 years ago