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Step2247 [10]
3 years ago
13

When a group 7 element reacts with a group 1 element, what is the effect on the group 1 atom

Chemistry
1 answer:
a_sh-v [17]3 years ago
4 0

Answer:

Explanation:

group 1 element is oxidized, group 7 element is reduced .Covalent bond is formed so both elements can gain noble gas configuration.  

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8 0
3 years ago
What are some examples of mixtures?
Flura [38]

Here are 5 examples of suspensions mixtures:

<span>1-mercury shaken in oil</span>

<span>2-oil shaken in water</span>

<span>3-powdered chalk in water </span>

<span>4-dust in air</span>

<span><span>5-soot in air</span></span>

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8 0
3 years ago
What mass, in grams, of aluminum hydroxide will be required to prepare the 4 L of a 1.75 M solution?
brilliants [131]

Answer: 0.53g

Explanation:

No of moles= volume ×molarity/1000

We have the volume and the molarity

Volume=4L

Molarity=1.7M

No of moles = 4×1.7/1000

No of moles= 0.0068moles

Remember also that

No of moles= mass given/molar mass

Molar mass of Al(OH)3

Al= 27

O=16

H=1

Molar mass = Al+(O+H)3

Molar mass= 27+(16+1)3

Molar mass= 27+(17)3

Molar mass = 27+51

Molar mass= 78g/mol

To get the mass

Mass given = no of moles × molar mass

Mass= 0.0068×78

Mass= 0.53g

6 0
4 years ago
I need help with this
son4ous [18]

Answer:

2nd one

Explanation:

4 0
3 years ago
If a sample of C-14 initially contains 1.5 mmol of C-14, how many millimoles will be left after 2255 years?
CaHeK987 [17]

Answer: 3.2\times 10^{-4} millimoles will be left after 2255 years.

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

a = let initial amount of the reactant  

a - x = amount left after decay process  

a)  t_{\frac{1}{2}} of carbon = 5730 years

k}=\frac{0.693}{5730}=1.21\times 10^{-4}years^{-1}

b) millimoles left after 2255 years

2255=\frac{2.303}{1.21\times 10^{-4}}\log\frac{1.5}{a-x}

\log\frac{1.5}{(a-x)}=8.44

\frac{1.5}{(a-x)}=4628.5

(a-x)=3.2\times 10^{-4}millimoles

8 0
3 years ago
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