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sertanlavr [38]
2 years ago
7

I just need help with these 2 questions I accidentally answered the first one

Chemistry
1 answer:
Anni [7]2 years ago
7 0

Answer:

i think the pool

Explanation:

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complete the name of an alkali that could react with phosphoric acid to make sodium hydrogen phosphate
elena-s [515]
The answer is sodium hydroxide
7 0
3 years ago
the half-life of chromium 51 is 28 days if the sample contained 510 grams how much chromium would remain after 86 days​
Anni [7]

Answer: 3.285714285714286 I believe this is what it is

Explanation:

You have to divide 50 by 28 then times it by 510 then divide by 86

5 0
3 years ago
¿qué propiedades tomó en cuenta John Newlands para clasificar los elementos de la tabla periódica?
liubo4ka [24]

Answer:

John Newlands propuso su ley de octavas en 1864 en la que organizó todos los elementos conocidos en ese momento en una tabla en orden de masa atómica relativa. Cuando hizo esto, descubrió que cada elemento era similar al elemento ocho lugares más adelante.

8 0
3 years ago
If the heat capacity of a ceramic cup is 0.820 j°c-1, how much heat is required to raise the temperature of the cup from 25.0°c
Aleksandr [31]
The  heat  required  to raise   the  temperature  of  the  cup  from  25 c   to  50  c  is  calculated  as  follows
Q (heat)  =   c   x  delta  T
c =  specific  heat  capacity  =  0.  820   j/c
  delta T  =  change   in temperature  (  50 c-  25  c  =  25c

=  0.820 j /c  x  25 c  =  20.5  j

4 0
3 years ago
Read 2 more answers
This is a sign of a chemical reaction that involves the production of bubbles or fizzing
Leviafan [203]

Answer:

gas production

Explanation:

8 0
3 years ago
Read 2 more answers
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