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docker41 [41]
2 years ago
8

its not letting me answer questions at all when it wants me to log in it says its not it. So what do ??

Chemistry
2 answers:
Nady [450]2 years ago
5 0

Your account has probably been reported/locked. Someone probably reported account several times, and after several warnings, they will lock your account. You'll have to create a new account.

Another problem could be that you submitted a request to delete your account, and it just got accepted.

~theLocoCoco

Elenna [48]2 years ago
4 0

Answer:

Ion think you have enough coins or make a account!

Explanation:

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Which of the following best describes the location of element Tin?
Tomtit [17]

Answer:

The location of element tin is

Group 14, Period 5

Explanation:

7 0
3 years ago
Read 2 more answers
A reaction that combines simpler reactants to form a new compound is called a
uranmaximum [27]

Answer:

A reaction that combines simpler reactants to form a new compound is called a

<h2>Synthesis reaction.</h2>
6 0
3 years ago
If 12.5 grams of the original sample of cesium-137 remained after 90.6 years, what was the mass of the original sample?
myrzilka [38]

Answer:

Mass of original sample = 100 g

Explanation:

Half life of cesium-137 = 30.17 years

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac{\ln2}{t_{1/2}}

k=\frac{\ln2}{30.17}\ year^{-1}

The rate constant, k = 0.02297 year⁻¹

Time = 90.6 years

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

Initial concentration [A_0] = ?

Final concentration [A_t] = 12.5 grams

Applying in the above equation, we get that:-

12.5\ g=[A_0]e^{-0.02297\times 90.6}

[A_0]=\frac{12.5}{e^{-0.02297\times 90.6}}\ g=100\ g

<u>Mass of original sample = 100 g</u>

8 0
2 years ago
A 44.8 g rhodium sample contains how many rhodium atoms
Tresset [83]

Answer:

2.63*10^23

Explanation:

1 mol rhodium = 102.91

44.8g/1 mol * 1 mol/ 102.91mol * 6.022*10^23/1 mol =

2.63*10^23

6 0
3 years ago
Why does galium melt
levacccp [35]

Answer:

Like most other metals, Gallium is solid at room temperature (or liquid if it is too hot in your room). But, if it is held [in hands] for long enough, it melts in your hands, and doesn't poison you like Mercury would. This is because of its unusually low melting point of (~29 degree Centigrade).

- It melts once it reaches its melting point.

:)

7 0
2 years ago
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