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Natasha2012 [34]
3 years ago
10

How many neutrons are present in an atom with atomic number 9 and mass number 19?​

Chemistry
2 answers:
katovenus [111]3 years ago
8 0
10 what Eddie said is correct
Kaylis [27]3 years ago
5 0

Answer:

10 neutrons

Explanation:

N=Z-A ie. number of neutrons=mass number-atomic number

N=19-9=10

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Oxana [17]

Lead can cause

D.) brain damage

Explanation:

Lead poisoning is a sort of metal poisoning generated by lead in the body. The brain is the most sensitive. Symptoms may comprise abdominal pain, illness, headaches, irritability, thought problems, inability to have children, and tingling in the hands and feet. It causes almost 10% of the intelligent weakness of otherwise unknown cause also can result in behavioral problems. Some of the outcomes are strong. In severe cases, anemia, convulsions, coma, or death may occur.

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3 years ago
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What is the energy of a photon emitted with a wavelength of 448 nm?
DIA [1.3K]

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i think D is correct

Explanation:

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3 years ago
Sound waves move the slowest through which medium :<br> water<br> ice<br> air<br> wood
sasho [114]

Answer

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Cacl2+na3po4 ca3po42 + nacl
Alex787 [66]
<h3>Answer:</h3>

3CaCl₂ + 2Na₃PO₄→ Ca₃(PO₄)₂ + 6NaCl

<h3>Explanation:</h3>

We are given the Equation;

CaCl₂ + Na₃PO₄→ Ca₃(PO₄)₂ + NaCl

Assuming the question requires us to balance the equation;

  • A balanced chemical equation is one that has equal number of atoms of each element on both sides of the equation.
  • Balancing chemical equations ensures that they obey the law of conservation of mass in chemical equations.
  • According to the law of conservation of mass in chemical equation, the mass of the reactants should always be equal to the mass of the products.
  • Balancing chemical equations involves putting appropriate coefficients on the reactants and products.

In this case;

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3CaCl₂ + 2Na₃PO₄→ Ca₃(PO₄)₂ + 6NaCl

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3 years ago
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Tree root systems have a handful of large roots that branch out into a network of smaller roots that often extend out far beyond their branches do. These root systems prevent erosion by holding the soil in place and improving drainage which helps water get absorbed into the soil instead of just running over the top.

Hope this helps

All the love, Ya boi Fraser :)

7 0
2 years ago
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