AB G C F G Y OBLAD

If Bromine has a density of 7.52 g/ml, which of the following will float in Bromine?

givi [52]

A: gold 19.32 g/ml

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8 0

3 years ago

Assign oxidation numbers to each element in this compound. NO

algol13

<u>Answer:</u>

NO ---> N +2 and O -2

<u>Explanation:</u>

Oxidation numbers are assigned to the elements of a compound to keep a track of the number of electrons each atom has.

Here we have a compound NO (Nitrogen Oxide). The Nitrogen is assigned an oxidation number of +2 while Oxygen in this compound is assigned an oxidation number of -2.

So the algebraic sum of the oxidation numbers of the elements in the compound NO is equal to zero.

5 0

3 years ago

Read 2 more answers

How many moles of nitrogen gas will occupy a volume of 5L at 3.85 atm and 27c?

Olegator [25]

Answer:

$n=0.78mol$

Explanation:

Hello there!

In this case, according to the given information, it possible for us to realize that this problem is solved via the ideal gas equation:

$PV=nRT$

By which we solve for n (moles) as shown below:

$n=\frac{PV}{RT}$

Then, we plug in the given pressure, volume and temperature (in K) to obtain:

$n=\frac{3.85atm*5L}{0.08206\frac{atm*L}{mol*K}*(273+27)K} \\\\n=0.78mol$

Regards!

7 0

3 years ago

how do you tell if an element has positive or negative charge. And how do you know when the valence electrons have to be shared

Eva8 [605]

Answer:

A normal atom has a neutral charge. When you are missing electrons it has a positive charge. When you have extra electron, you have a negative charge. I am not sure what the answer to your second question is, sorry.

Explanation:

7 0

4 years ago

Why can the grasses now grow when they couldn’t earlier?

andrew-mc [135]

Grasses can grow where they could not earlier because the soil conditions, water volume, or rate of sunlight have evolved.

Each species of plant requires specific conditions to thrive. These conditions include:

Nutrients from the soil.
Sunlight
Specific amount of water.

This implies that if the conditions for a specific species are not provided in terms of sunlight, radiation, and water, the plant will not grow in that specific zone. In the same way, if the conditions of a zone change and they are not suitable for a plant species the plant will grow even if this was not possible before.

This key idea is the reason why some plants including grasses can now grow in zones where they did not exist before. Some of the factors that have contributed to this are:

Fertilization: This provides soils with necessary nutrients.
Climate change: This has affected climate patterns, and therefore it can increase or decrease radiation.
Irrigation: This increases the amount of water available for plants.

Learn more about grass in: brainly.com/question/3671945

3 0

3 years ago