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marin [14]
3 years ago
6

Density = Mass

Chemistry
1 answer:
MissTica3 years ago
8 0

Answer:

what is it all about???

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Which atom would have the largest radius?
ryzh [129]

Answer:

D, Rubidium

Explanation

Rubidium- 290 pm

Cobalt- 200 pm

Beryllium- 153 pm

Helium- 140 pm

5 0
3 years ago
What is the standard heat of reaction for the following reaction?
8090 [49]

Answer:

The correct answer to the question is

The standard heat of reaction for the reaction is

a. 216.8 kJ released per mole

Explanation:

The heat of reaction is given by [Heat of formation of products] - [Heat of formation of reactants]

In the question we have, heat of formation of the products Zn+2 (aq) = -152.4 kJ/mole and the heat of formation of the reactants = 64.4 kJ/mole

Therefore, the heat of formation of the reaction = (-152-64.4) kJ/mole or

-216.8 kJ/mole released

5 0
3 years ago
2. A golden-colored cube is handed to you. The person wants you to buy it for
lara31 [8.8K]

Answer:

Volume of the cube is 2*2*2 = 8cm^3.

Divide the weight (40g) over the volume (8cm^3).

Density is 5g/cm^3. Definitely not gold.

Explanation:

4 0
3 years ago
At rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of
pshichka [43]

Answer:

a. Remaining at rest requires the use of ATP.

Explanation:

The resting membrane potential is maintained by the sodium-potassium pump. The sodium potassium pump does this by actively pumping sodium ions out of the cell and potassium ions inside the cell in a ratio of 3:2. This movement of ions by the sodium-potassium pump is against their concentration gradient. In a neuron at rest, there are more sodium ions outside the cell than there are inside the cell. Also, there are are more potassium ions inside the cell than there are outside the cell. However, there are ion channels through which these ions enter and leave the cell. Sodium ion channels allow sodium to enter the cell following its concentration gradient, whereas, potassium ion channels allow potassium to leave the cell following its concentration gradient. However, more potassium ions leave the cell than do sodium ions enter the cell because of the higher permeability of the cell to potassium ions.

In order to maintain the resting membrane potential, the sodium potassium pump powered by the hydrolysis of an ATP molecules pumps sodium ions out of the cell and potassium ions into the cell.

<em>Therefore, the correct option is A, as ATP is needed by the sodium-potassium pump in order to maintain the resting membrane potential.</em>

6 0
3 years ago
How can math tools help you detect errors or inaccuracies in data?
elena-14-01-66 [18.8K]
There are a lot of math tools that can be used to detect inaccuracies of data. Math tools usually used to collect, to organize, to analyse and to present data. Math tools are also used to estimate and find the accurate, precise and signification answers to every study. With Math tools, it is easy to detect if there is inaccurate data, like for example measuring the liquid substances, it needs measuring cup to check if the substance you put is precise.



4 0
3 years ago
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