3 years ago

What element has a mass number of 65 and 36 neutrons?

Chemistry

1 answer:

cestrela7 [59]3 years ago

7 0

According to the table of elements the answer is Zinc :)

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3) During the day at 27°C a cylinder with a sliding top contains 20.0 liters

tatiyna

Answer:

$T_2=12\°C$

Explanation:

Hello there!

In this case, according to the Charles' law equation which help us to understand the directly proportional relationship between volume and temperature:

$\frac{T_2}{V_2}=\frac{T_1}{V_1}$

Thus, by solving for the final temperature, T2, and making sure we use the temperatures in Kelvin, we can calculate the final temperature as shown below:

$T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{(27+273)K*19L}{20.0L}\\\\T_2=285-273\\\\T_2=12\°C$

Best regards!

4 0

2 years ago

I need help doing this please. It’s an image

Ne4ueva [31]

Answer:

Ba2+

Al3+

K+

S2-

you may think that if it has a + it would be bigger, but it is actually the opposite.

5 0

3 years ago

Hydrofluoric acid, hf(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the

Trava [24]

1) Chemical equation

Na2 SiO3 (s) + 8 HF (aq) ---> H2 Si F6 (aq) + 2 Na F (aq) + 3H2O (l)

It is balanced

2) Molar ratios

1 mol Na2 SiO3 : 8 mol HF.

3) Proportion

0.340 mol Na2 SiO3 * 8 mol HF / 1mol Na2SiO3 = 2.72 mol HF.

Answer: 2.72 mol HF

5 0

3 years ago

If 65 grams of sodium carbonate powder is reacted with excess sulfuric acid, then how many mL of gas over water are collected at

shtirl [24]

Answer:

Explanation:

7 0

3 years ago

How many oxygen atoms are present in 22.6 grams of sulfur trioxide (SO,)?<br> (Show work)

s2008m [1.1K]

Answer:

Well,

oxygen atoms..

Explanation:

Where

≡

Avogadro's number

≡

6.022

⋅

−

And so if wl1

oxygen atoms...

i.e.

18.066×

1023

⋅

oxygen atoms..

8 0

2 years ago