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vfiekz [6]
3 years ago
15

MATCH

Chemistry
2 answers:
almond37 [142]3 years ago
6 0
I wanna say it would be 1 would be A 2 would be C 3 would be D 4 would be B and 5 would be E



hope this helps
tatiyna3 years ago
6 0

Answer: 1-a, 2- e, 3- b, 4- c, 5 - d

Explanation:

Refracting telescope is used in spy camera as it uses lens to gather and focus light.

Spectrograph separates starlight into wavelengths.

Giant reflectors see behind nebulae dust.

Radio telescope helps in picking up faint lighted stars.

Giant refractors helps to see binary stars.

Hence, 1-a, 2- e, 3- b, 4- c, 5 - d

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What mass of nitrogen is required to react with 16 grams of oxygen?
damaskus [11]

Answer:

14g

Explanation:

N2 + 2O2 => 2 NO2

Molar mass of O2 = 32g/mol

No of mol= 16/32 = 0.5 mol

2 moles of Oxygen react with 1 mol of N2

1 mol of oxygen react with X mol of N2

X = 0.5mol

Molar mass of N2 = 28g/mol

No of mol = mass/molar mass

Mass = 0.5 × 28 = 14g.

8 0
3 years ago
In descriptive scientific investigations, scientists often make observations to understand the interacting parts of a complex (b
wlad13 [49]

Answer:

Complex  System

Explanation:

Given that, a descriptive scientific investigation is one of the three main types of investigation which formulates and quantify the natural phenomenon.  This natural phenomenon oftentimes involves Complex System, such as microscopic organisms, thereby, scientists often make observations to understand the interacting parts of this COMPLEX SYSTEM

Hence, the right answer is a COMPLEX SYSTEM

8 0
3 years ago
An atom that has 13 protons and 15 neutrons is isotope of the element A.) nickel B.) silicon C.) aluminum D.) phosphorus. Why?
joja [24]

An atom that has 13  protons and 15  neutrons  is isotope  of Aluminium (answer C)

<u><em>Explanation</em></u>

  • Isotope  is a form of the same element with   the equal number of protons but difference number  of neutrons  in  their nuclei.
  • In other words isotope has the same  atomic number but different mass  number.
  • Atomic  number of a element is determined by number of  protons of an element.

  • from the  periodic table   Aluminum in atomic number 13 therefore  it has 13 protons  <em>therefore an atom that  has 13  protons and 15 neutrons is   a isotope  of Aluminium. </em>
6 0
3 years ago
Read 2 more answers
The oxidation state of phosphorus is +3 in
IgorC [24]

Answer:

b) Phosphorus acid

Explanation:

To distinguish the type of acid of phosphorus with the oxidation state of +3, we need to be familiar with the chemical formula of each of the compounds:

    Orthophosphoric acid             H₃PO₄

    Phosphorus acid                       H₃PO₃

    Metaphosphoric acid               HPO₃

    Phyrophosphoric acid​               H₄P₂O₇

Now that we know the formula of the given compounds, the algebraic sum of all the oxidation numbers of all atoms in a neutral compound is zero:

Only phosphorus acid yielded an oxidation state of +3 for phosphorus in the compound.

  H₃PO₃:

   we know the oxidation state of H = +1

                                                          O = -2

         The oxidation state of P is unknown. We can express this as an equation:

                3(+1) + P + 3(-2) = 0

                    3 + P -6 = 0

                          P-3 = 0

                          P = +3

6 0
3 years ago
A gas takes up a volume of 10 liters, has a pressure of 7.5 atm, and a
Y_Kistochka [10]

Answer:

I’m trying to do something similar to that

Explanation:

3 0
3 years ago
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