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White raven [17]
3 years ago
14

Which label belongs in the area marked W?

Chemistry
1 answer:
Goryan [66]3 years ago
7 0

Answer:

A) are called "true" bacteria

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What is the charge of Fe?
ki77a [65]
It depends on the context iorn is a transition metal so it can hold a charge from 1-8
7 0
4 years ago
If an atom has three shell and number of valence electrons are two. Is this element metal
cluponka [151]

Answer:

Metal

Element: Calcium

Valency: 2

Explanation:

To find the element, let's use the periodic table. (Look below)

We already went past 3 shells, just need the 2 electrons after it.

Just skip to the 4th row and count 2 to the right

We end up at Calcium.

Calcium is a metal and we're also on the alkaline earth metals column.

Calcium will need to lose 2 electrons to reach stability, so the valency is 2.

3 0
3 years ago
Please help!!<br><br> What colors do acids and bases turn litmus paper?
Yakvenalex [24]

Answer:

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3 0
4 years ago
Read 2 more answers
If 2.00 moles of H₂ and 1.55 moles of O₂ react how many moles of H₂O can be produced in the reaction below?
jekas [21]

Answer:

2 mol H₂O

Explanation:

With the reaction,

  • 2H₂(g) + O₂(g) → 2 H₂O(g)

1.55 moles of O₂ would react completely with ( 2*1.55 ) 3.1 moles of H₂. There are not as many moles of H₂, thus H₂ is the limiting reactant.

Now we <u>calculate the moles of H₂O produced</u>, <em>starting from the moles of limiting reactant</em>:

  • 2.00 mol H₂  * \frac{2molH_2O}{2mol H_2} = 2 mol H₂O
5 0
3 years ago
How many moles of gold, a U, are in 3.60×10^-5 G of gold?
ch4aika [34]

Answer:

See Below.

Explanation:

This is a conversion problem:

Using the molar mass of Gold (given in a periodic table) which is 196.97g/mol

you have

(3.60*10^-5 g) *\frac{1moles}{196.97g}

you always arrange the equation in a way to cancel whatever you don't want (grams) and leave what you do want (moles). Here grams cancel (top and bottom), so you're left with:

\frac{(3.60*10^-5 g) *(1)}{196.97} = 1.83*10^-7 moles of Gold

8 0
4 years ago
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