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Valentin [98]
3 years ago
6

resistor has a resistance of 1.8 W. How much current passes through the resistor if there is a potential difference of 3.0 V acr

oss the resistor?
Chemistry
1 answer:
valentinak56 [21]3 years ago
3 0

Answer:

4.0 V?

Explanation

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During a qualitative analysis experiment a student found his unknown salt to contain mn2 and po43- ions. write the chemical form
MrMuchimi

The ions in the unknown salt are:

Mn^{2+} and PO_{4}^{3-}

The chemical formula of the salt is determined as shown in the picture.

The chemical formula of the salt is Mn_3(PO_{4})_{2}.


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3 years ago
Explain how heat moves from one end of a metal rod to the other. (use terms small particles/ atoms, collide, transfer of energy,
lisabon 2012 [21]

Answer:

I only know number one answer hope it is helpful

Conduction is the transfer of heat through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know there is thermal motion of the atoms and molecules at any temperature above absolute zero.) Heat transferred from an electric stove to the bottom of a pot is an example of conduction.

Some materials conduct thermal energy faster than others. For example, the pillow in your room may the same temperature as the metal doorknob, but the doorknob feels cooler to the touch. In general, good conductors of electricity (metals like copper, aluminum, gold, and silver) are also good heat conductors, whereas insulators of electricity (wood, plastic, and rubber) are poor heat conductors.

3 0
3 years ago
Balance the reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1.
Ilia_Sergeevich [38]

Answer:

2H₂O₂ → 2H₂O + O₂

Explanation:

H₂O₂ → H₂O + O₂

The above equation can be balance as illustrated below:

H₂O₂ → H₂O + O₂

There are 2 atoms of O on the left side and a total of 3 atoms on the right side. It can be balance by putting 2 in front of H₂O₂ and 2 in front of H₂O as shown below:

2H₂O₂ → 2H₂O + O₂

Now, the equation is balanced.

**** check ****

Element >>> Left Side >>> Right Side

H >>>>>>>>> 4 >>>>>>>>> 4

O >>>>>>>>> 4 >>>>>>>>> 4

6 0
3 years ago
What kind of nuclear reaction occurs in the following reactions?
KatRina [158]

Answer:

No 1 is fission

while no 2 is fusion

Fission is splitting on nucleus while fusion is forming heavier nucleus with nuclei

8 0
3 years ago
If the pKa value for a given acid is low, what does that say about the acid (is it weak or strong)?
Dmitry [639]

Answer:

If the pKa of the acid is low (negative), then the acid is strong.

Explanation:

Ka, <em>the acid ionization constant,  </em>measures the strength of an acid in a solution. Stronger acids have higher Ka values.

We defined: pKa = -log[Ka]

This function is a decreasing function, meaning that pKa will be getting smaller and smaller,  while increasing Ka (high values of Ka will have negative pKa values). Therefore, stronger acids (high values of Ka), will have low (negative) pKa values.

3 0
3 years ago
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