3 years ago

Name an element or elements in the periodic table that you would expect to be chemically similar to potassium.

1 answer:

6 0

Potassium (K) is in Group I of the periodic table, and elements in the same column (period) are similar. Sodium (Na), or lithium (Li) are similar.

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Which ecosystem is most resilient to change due to its high diversity?

devlian [24]

Answer:

coral reef

Explanation:

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2 years ago

In physical change the make up of matter is changedWho or false

Harrizon [31]

Answer:

False

That is a chemical change

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Read 2 more answers

A student carefully placed 15.6 g of sodium in a reactor supplied with chlorine gas. When the reaction was complete, the student

BabaBlast [244]

Answer:

24.09 grams of chlorine gas reacted.

Explanation:

$2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)$

Moles of sodium chloride = $\frac{39.7 g}{58.5 g/mol}=0.6786 mol$

According to reaction, 2 moles of NaCl are formed from 1 mole chlorine gas.

Then 0.6786 moles of NaCl will be formed from;

$\frac{1}{2}\times 0.6786 mole=0.3393 mol$

Mass of 0.3393 moles of chlorine gas:

0.3393 mol × 71 g/mol = 24.09 g

24.09 grams of chlorine gas reacted.

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3 years ago

If the concentrated form of blood expander is 9.0 mol/L and one of your companions, a nurse, tells you that you need to have a f

I am Lyosha [343]

Answer:

0.032 L or 32 mL

Explanation:

Use the dilution equation M1V1 = M2V2

M1 = 9.0 M

V1 = This is what we're looking for.

M2 = 0.145 M

V2 = 2 L

Solve for V1 --> V1 = M2V2/M1

V1 = (0.145 M)(2 L) / (9.0 M) = 0.032 L

3 0

2 years ago

What are three things that are considered a chemical change

kodGreya [7K]

Answer:

Color change, precipitation, bubbling

Explanation:

Chemical change changes the chemical composition and undergoes a process in which it results as a new substance.

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2 years ago