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MrMuchimi
3 years ago
7

Pleaseee helpppp ASAP will mark brainliest!!! :)

Chemistry
2 answers:
miskamm [114]3 years ago
6 0

Answer:Well sorry if I am wrong but I think the answer is

A: The number of electrons bromine has 35

B: The number of valence electrons bromine has 7

C:The number of protons bromine has 35

D:The number of neutrons bromine has 45

————————————————————————————

So the answer is B (I think)

Tasya [4]3 years ago
5 0

Answer:

B, this is a representation of the shell of electrons. Then open spot is where is would share an electron to made a bind. This picture, shows the valence electrons in that ring. Bromine has 7 in this zone, seeking 1 additional.

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What is the formula of nickel(ll) nitrate hexahydrate? (a) NiNO3 .6H2O (b) Ni2NO3 .6H2O (c) Ni(NO3)2 .6H2O (d) NiNO3 .12H2O e) N
kakasveta [241]

Answer:

Explanation:

The formula of nickeI(II)nitrate hexahydrate is

Ni(NO3)2.6H2O

So option (c) is correct.

8 0
4 years ago
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The __________ system is made of a series of glands that release chemicals directly into the bloodstream.
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The endocrine system is made of a series of glands that release chemicals directly into the bloodstream. 
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3 years ago
Impacts of Erosion and Deposition
VikaD [51]

Answer: Plants

Explanation:

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7 0
2 years ago
NH4NO3 + Na3PO4 → (NH4)3PO4 + NaNO3
Papessa [141]

Based on the equation of the reaction and the data provided,

  • NH4NO3 is the limiting reactant
  • mass of Na3PO4 left is 29.375 g
  • 18.75 g of (NH4)3PO4 is produced
  • 31.875 g of NaNO3 is produced

<h3>What are limiting reactants?</h3>

A limiting reactant is a reactant which is used up in a reaction after which the reaction stops.

In the given reaction:

3 NH4NO3 + Na3PO4 → (NH4)3PO4 + 3 NaNO3

The limiting reactant is determined from the stoichiometry of the eqaution.

Moles of reactant = mass/molar mass

Molar mass of NH4NO3 = 80 g/mol

Molar mass of Na3PO4 = 165 g/mol

Molar mass of (NH4)3PO4 = 150 g/mol

Molar mass of NaNO3 = 85 g/mol

From the equation of the reaction, 240 g (3 × 80) of NH4NO3 is required to react with 165 g of Na3PO4

There are only 30.0 g of NH4NO3 reacting with 50.0 g of Na3PO4

30 g of Na3PO4 will react with 30 × 165/240 = 20.625 g of Na3PO4

Therefore, NH4NO3 is the limiting reactant

Na3PO4 is the excess reactant

mass of Na3PO4 left = 50 - 20.625

mass of excess reactant left = 29.375 g

moles of NH4NO3 in 30 g = 30/80 = 0.375 moles

3 moles of NH4NO3 produces 1 mole of (NH4)3PO4

0.375 moles of NH4NO3 will produce 0.375 × 1/3 = 0.125 moles of (NH4)3PO4

mass of 0.125 moles of (NH4)3PO4 = 0.125 × 150

mass of (NH4)3PO4 produced = 18.75 g of (NH4)3PO4

3 moles of NH4NO3 produces 3 moles of NaNO3

0.375 moles of NH4NO3 will produce 0.375 moles of NaNO3

mass of 0.375 moles of NaNO3 = 0.375 × 85

mass of NaNO3 produced = 31.875 g of NaNO3

Learn more about limiting reactant at: brainly.com/question/24945784

4 0
2 years ago
What is the concentration of a solution that has 15.0 g NaCl dissolved to a total of 750 ml?
Oksana_A [137]

<u>Answer:</u> The concentration of solution is 0.342 M

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

We are given:

Mass of solute (Sodium chloride) = 15 g

Molar mass of sodium chloride = 58.5 g/mol

Volume of solution = 750 mL

Putting values in above equation, we get:

\text{Molarity of solution}=\frac{15g\times 1000}{58.5g/mol\times 750mL}\\\\\text{Molarity of solution}=0.342M

Hence, the concentration of solution is 0.342 M

6 0
3 years ago
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