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3 years ago

An atom that undergoes radioactive decay and has a large nucleus most likely contains..

1 answer:

5 0

An atom that undergoes radioactive decay and has a large nucleus most likely contains....<span>- More protons than electrons.</span>

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HELP ME PLZ ITS REALLY IMPORTANT! PLEASE TRY TO DO ALL!!

poizon [28]

1. holding a tray in the cafeteria line
2.
3. joule divided by a second
4.
5. the force a simple machine applies to an object

7 0

3 years ago

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.155 g of this subunit w

olga_2 [115]

Answer : The molar mass of protein is, $1.38\times 10^4g/mol$

Explanation :

Formula used :

$\pi =CRT\\\\\pi=\frac{w\times 1000}{M\times V}RT$

where,

$\pi$ = osmotic pressure = 0.138 atm

C = concentration

R = solution constant = 0.0821 L.atm/mol.K

T = temperature = $28^oC=273+28=301K$

w = mass of protein subunit = 0.155 g

M = molar mass of protein subunit = ?

V = volume of solution = 2.00 mL

Now put all the given values in the above formula, we get:

$\pi=\frac{w\times 1000}{M\times V}RT$

$0.138atm=\frac{0.155g\times 1000}{M\times 2.00ml}\times (0.0821L.atm/mole.K)\times (301K)$

$M=13878.17g/mol=1.38\times 10^4g/mol$

Therefore, the molar mass of protein is, $1.38\times 10^4g/mol$

6 0

3 years ago

Sodium metal and water react to form hydrogen and sodium hydroxide. If 1.99 g of sodium react with water to form 0.087 g of hydr

zavuch27 [327]

Answer:

1.56 g of water was involved in the reaction

Explanation:

From the stoichiometric equation

2Na + 2H2O = 2NaOH + H2

NB : Mm Na= 23, Mm H2O = ( 2+16)= 18

2(23) of Na requires 2(18) of water

Hence 1.99g of Na will require 1.99×2×18/2(23) of water = 1.56 g of water

7 0

4 years ago

Read 2 more answers

Write a balanced equation for the neutralization reaction between the following (you do not need to include states of matter):

givi [52]

Answer:

Both have the same balance on a weight with. 2 dimensional figures on the area formula

Explanation:

8 0

2 years ago

A train in Japan can travel 813.5 miles in 5 hours

Anastaziya [24]

Answer:

162.7miles/hr

Explanation:

Given parameters:

Distance covered by the train = 813.5miles

Time taken = 5hours

Unknown:

Speed of the train = ?

Solution:

Speed is a physical quantity.

It is mathematically expressed as;

Speed = $\frac{distance}{time}$

So, input parameters and solve;

Speed = $\frac{813.5}{5}$ = 162.7miles/hr

8 0

3 years ago