All categories

3 years ago

Please check my answer! Due in a few minutes!

Chemistry

2 answers:

rewona [7]3 years ago

8 0

Answer:

Explanation:

It is A. that is the only one that really makes any sense to me.

I do hope I helped you! :)

Gwar [14]3 years ago

6 0

Answer:

write a hypothesis

Explanation:

in a lb procedure a hypothesis is most likely useful whaen doing science

You might be interested in

Help please I am so lost my teacher is no help

uranmaximum [27]

Answer:

B - CALCIUM

Explanation:

Hopes it helps

6 0

3 years ago

If a piece of cadmium with a mass of 37.60 g and a temperature of 100.0 oC is dropped into 25.00 cc of water at 23.0 oC, what wi

zlopas [31]

Answer:

$T_{eq}=28.9\°C$

Explanation:

Hello!

In this case, since it is observed that hot cadmium is placed in cold water, we can infer that the heat released due to the cooling of cadmium is gained by the water and therefore we can write:

$Q_{Cd}+Q_{W}=0$

Thus, we insert mass, specific heat and temperatures to obtain:

$m_{Cd}C_{Cd}(T_{eq}-T_{Cd})+m_{W}C_{W}(T_{eq}-T_{W})=0$

In such a way, since the specific heat of cadmium and water are respectively 0.232 and 4.184 J/(g °C), we can solve for the equilibrium temperature (the final one) as shown below:

$T_{eq}=\frac{m_{Cd}C_{Cd}T_{Cd}+m_{W}C_{W}T_{W}}{m_{Cd}C_{Cd}+m_{W}C_{W}}$

Now, we plug in to obtain:

$T_{eq}=\frac{37.60g*0.232\frac{J}{g\°C}*100.00\°C+25.00g*4.184\frac{J}{g\°C}*23.0\°C}{37.60g*0.232\frac{J}{g\°C}+25.00g*4.184\frac{J}{g\°C}}\\\\T_{eq}=28.9\°C$

NOTE: since the density of water is 1g/cc, we infer that 25.00 cc equals 25.00 g.

Best regards!

6 0

2 years ago

2. What is the current running through a toaster if the resistance is 15

pogonyaev

I’ll help you 8n a bit

8 0

2 years ago

When an aqueous solution containing hydrochloric acid is just neutralized with an aqueous solution containing sodium hydroxide,

Elza [17]

Answer:

c. salty.

Explanation:

From the question,

The reaction of an acid , i.e hydrochloric acid and a base i.e. , sodium hydroxide takes place , which is a type of neutralization reaction,

Where the acid and a base reacts to give salt along with water .

From the question,

The reaction is as follows -

2 HCl + NaOH → NaCl + H₂O

Hence, the resulting product is a salt ,

Therefore , the resulting solution would taste like salt.

3 0

3 years ago

For Neutron it’s supposed to be 36 right ?

Elena-2011 [213]

I believe so..... hmm idk

5 0

3 years ago