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blagie [28]
3 years ago
13

What do you know about a chemical compound by looking at its chemical formula?

Chemistry
2 answers:
defon3 years ago
8 0
B. 
"The number and kinds of atoms in the compound." 

coldgirl [10]3 years ago
4 0
The type of bonds present in the compound. and the type of structure it has and the elements that are presents and the number of moles of each element in one mole of the compound.
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Why are cations positive?
dsp73

Answer:

A cation has more protons than electrons, consequently giving it a net positive charge.

7 0
2 years ago
Read 2 more answers
Water has a heat of fusion of about 300J/gram and a heat capacity for liquid water of a about 4J/gC. How much heat is needed to
amm1812

Answer:

The total heat required is 3.4 kJ

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. So, the amount of heat a body receives or transmits is determined by:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case you know;

  • Q= ?
  • c= 4 \frac{J}{g*C}
  • m= 10 g
  • ΔT= Tfinal - Tinitial= 10 C - 0 C= 10 C

Replacing:

Q= 4\frac{J}{g*C} *10 g * 10 C

Solving:

<em>Q1= 400 J</em>

On the other hand, you must determine the heat required to convert 0 ∘ C of ice to 0 ∘ C of liquid water by:

Q2=m*heat of fusion

Q2=10 g* 300 \frac{J}{g}

<em>Q2= 3,000 J</em>

The total heat required is:

Q= Q1 + Q2= 400 J + 3,000 J

Q= 3,400 J= 3.4 kJ (1 kJ= 1,000 J)

<u><em>The total heat required is 3.4 kJ</em></u>

5 0
3 years ago
The average weather conditions over a long period of time is known as
frosja888 [35]

Answer: it’s climate

Explanation:

5 0
2 years ago
Balance the nuclear reaction equation for the beta minus decay of nickel-63 by completing the missing numbers.
Marta_Voda [28]

Answer: 63 & 29

Explanation:

7 0
2 years ago
Plasma is often in stars, which are likely to contain?
elena-s [515]
Below are the choices that can be found from other sources:

<span>A) elements 
B) ions 
C) molecules 
D) neutrons

the answer is ions. 

</span>A Star<span> and hence our Sun, is an almost entirely ionized ball of </span>plasma<span>, consisting of electrons and ions, in which there is hardly any gas (neutral atoms). The movement of the </span>plasma<span> produces strong magnetic fields and corresponding electric currents.</span>
6 0
3 years ago
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