Ask question

Ask question

All categories

I am Lyosha [343]

2 years ago

5

Please help chemistry timed test

2 answers:

Artist 52 [7]2 years ago

8 0

Answer:

Barrium nucleus has 56 protons and 137−56=81 neutrons.

Atomic Mass 137.327 atomic mass units

Number of Protons 56

Number of Neutrons 81

Number of Electrons 56

lakkis [162]2 years ago

7 0

Answer:

54

Barium atomic number is 56, this means that it has 56 protons in its nucleus and put it as a period 6 element. an uncharged barium atom would have 56 electron also. However as a group 2 element barium easily loses 2 electron to form the +2 cation. the ions has 56-2=54

You might be interested in

Which would be the first of the two magnetic mentals in the mixture to be Melted? A. Copper B. Iron C. Nickel D. Yin

marissa [1.9K]

Answer:D. Tin

Explanation:

3 0

3 years ago

Choose the products that complete the reaction . The chemical equation may not be balanced . Al+H 2 SO 4 ? Al 2 (SO 4 ) 3 +H 2 O

alexandr402 [8]

Answer: Al2 (SO4)3 + H2

Explanation:

option C

5 0

3 years ago

A/An ______ bond occurs when 2 atoms share electrons.

allsm [11]

Answer:

convalent???????

Explanation:

sowwy if it wrong

8 0

2 years ago

SOLVE The density of a gas is 0.68 g/mL. What amount of space would 23.8 g of this gas occupy?

Contact [7]

Answer:

<h2>The answer is 35 mL</h2>

Explanation:

Density of a substance can be found by using the formula

$Density(\rho) = \frac{mass}{volume}$

From the question we are finding the amount of space the gas will occupy that's the volume of the gas

Making volume the subject we have

$volume = \frac{mass}{Density}$

From the question

mass = 23.8 g/mL

Density = 0.68 g/mL

Substitute the values into the above formula and solve

That's

$volume = \frac{23.8}{0.68}$

We have the final answer as

<h3>35 mL</h3>

Hope this helps you

6 0

3 years ago

The gas phase decomposition of sulfuryl chloride at 600 K SO2Cl2(g)SO2(g) + Cl2(g) is first order in SO2Cl2. During one experime

krok68 [10]

Answer: The rate constant for the reaction is $3.96\times 10^{-3}min^{-1}$

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample = 559 min

a = let initial amount of the reactant = $2.83\times 10^{-3}$

a - x = amount left after decay process = $3.06\times 10^{-4}$

$559min=\frac{2.303}{k}\log\frac{2.83\times 10^{-3}}{3.06\times 10^{-4}}$

$k=\frac{2.303}{559}\log\frac{2.83\times 10^{-3}}{3.06\times 10^{-4}}$

$k=3.96\times 10^{-3}min^{-1}$

The rate constant for the reaction is $3.96\times 10^{-3}min^{-1}$

6 0

3 years ago