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3 years ago

Convert: 950 g to kg

Chemistry

1 answer:

scZoUnD [109]3 years ago

4 0

Answer:your answer is 0.95

Explanation:

Because you put the number down if it is in the hundreds then put into a decimal that it is in the hundredths:)

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irakobra [83]

1. I think it is true?
2. Low melting points
3. True
4. Atomic number, I think it’s periods?
5. Groups?

Sorry, I might not get all of them right :(

Hope this helps you in any way!!

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3 years ago

Match the characteristics and elements to their group.

Luba_88 [7]

Answer:

Kr is a Noble Gas. Na is an alkali metal. F is halogen.

Group 17 is halogens. Inert is Noble Gases. Odourless and colourless is Noble Gases. Alkali metals do not occur freely in nature. Alkali metals are malleable

Explanation:

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3 years ago

Below is the Lewis structure of the hydrogen cyanide molecule.

lianna [129]

Answer :

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $HCN$

As we know that carbon has '4' valence electrons, hydrogen has '1' valence electrons and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in $HCN$ = 1 + 4 + 5 = 10

According to Lewis-dot structure we conclude that, there are 8 number of bonding electrons and 2 number of non-bonding electrons.

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

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3 years ago

Is baking soda acid?

otez555 [7]

Baking soda has a ph of 9. any # that has less than 7 as a ph is acid, any number that has a ph of 7 is neutral, and any number with a ph greater than seven is a base. so baking soda is not an acid but a base.

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3 years ago

Use the standard enthalpies of formation for the reactants and products to solve for the ΔHrxn for the following reaction. (The

Rudiy27

<span>
1. Remember (sum of products) - (sum of reactants)
So ΔHrxn = 2 ΔHf [H2(g)] + ΔHf [Ca(OH)2(s)] - 2 ΔHf [H2O(l)] - ΔHf [Ca(s)]
= 2*0 + -986.09 kJ/mol - 2*(-285.8 kJ/mol) - 0

Do the math and you'll have the answer. BTW the ΔHf [H2(g)] and ΔHf [Ca(s)] were 0 because these are elements in their standard states.

</span>HOPE THIS HELPS ;)

8 0

3 years ago

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