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ankoles [38]
3 years ago
9

For every pound a company spends on advertising, it spends £0,75 on its website. Express the

Chemistry
1 answer:
vodomira [7]3 years ago
6 0
It will have a ratio of 4:3
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Analysis of 20.0 g of a compound containing only calcium and bromine indicates that 4.00 g of calcium are present. What is the e
Leto [7]

Answer:

d. Ca_5Br_2

Explanation:

Mass of calcium = 4.00 g

Molar mass of calcium = 40.078 g/mol

<u>Moles of calcium = 4.00 / 40.078 moles = 0.9981 moles</u>

Given that the compound only contains calcium and bromine. So,

Mass of bromine in the sample = Total mass - Mass of calcium

Mass of the sample = 20.0 g

<u>Mass of bromine in sample = 20.0 - 4.00 g = 16.0 g</u>

Molar mass of bromine = 79.904 g/mol

<u>Moles of Bromine  = 16.0 / 79.904  = 0.2002 moles </u>

Taking the simplest ratio for Ca and Br as:

0.9981 : 0.2002  = 5 : 1

The empirical formula is = Ca_5Br_2

3 0
3 years ago
Which is a negative result of eating too many lipids?
Shtirlitz [24]
Answer: C-Fat deposits put a strain on the body.
6 0
3 years ago
Read 2 more answers
Given the balanced reaction: Zn + 2HCl H2 + ZnCl2 How many grams of zinc are needed to produce 5 grams of H2?
kumpel [21]

Answer:

161.9gZn

Explanation:

Hello there!

In this case, according the given balanced chemical reaction:

Zn + 2HCl\rightarrow  H_2 + ZnCl_2

It is possible to evidence the 1:1 mole ratio of hydrogen (molar mass = 2.02 g/mol) to zinc (atomic mass = 65.41 g/mol) which is used to calculate the grams of the latter needed for the production of 5 grams of the former via stoichiometry:

5gH_2*\frac{1molH_2}{2.02gH_2}*\frac{1molZn}{1molH_2} *\frac{65.41gZn}{1molZn}\\\\=161.9gZn

Best regards!

5 0
2 years ago
Do u eat poop and is it good for you
Olenka [21]

Answer:

no

Explanation:

no, because it will make me sick. And my doctor said that just because something is brown and squishy it isn't chocolate.

8 0
2 years ago
Read 2 more answers
Which of the following is NOT a type of nuclear decay? *<br> Alpha<br> Beta<br> Gamma<br> Delta
wolverine [178]

Answer:

Delta

Explanation:

Delta is a not a type of nuclear decay. Most times, the delta sign is used to denote a change between the initial and final states of a reaction.

There are three main types of nuclear decay which are:

  • Alpha decay
  • Beta decay
  • Gamma decay
  1. Alpha decay results in the formation of alpha particles.
  2. Beta decay produces electron like particles.
  3. Gamma decay produces gamma radiations.
8 0
2 years ago
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