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Leya [2.2K]
3 years ago
11

What types of elements are responsible for the colors of fireworks?

Chemistry
1 answer:
AfilCa [17]3 years ago
3 0
Transition metals usually 
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If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?
GaryK [48]

Horizontal if I am correct

3 0
4 years ago
How many grams of Ca are contained in 113 mL of 0.52 M Ca (OH)2 solution
Kay [80]
<span>113 ml = 0.113L

0.52M = 0.52 mol/L

(0.52 mol/L) x 0.113L = 0.059 mol x (molar mass of Ca) = your answer. </span>
8 0
3 years ago
How do isotopes affect the average atomic mass of an element?
kirill [66]

Answer:

The versions of an element with different neutrons have different masses and are called isotopes. The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth.

Explanation:

7 0
3 years ago
A sample of gas has a pressure of 100.0 KPa and 25C. Calculate the pressure if the temperature is changed to 125C while the volu
atroni [7]

Answer:

133.56kPa

Explanation:

Applying Pressure Law,

P/T = P'/T'....................... Equation 1

Where P = Initial pressure, T = Initial Temperature, P' = Final pressure, T' = Final Temperature.

From the question, we were asked to calculate P'

There, we make P' the subject of the equation

P' = PT'/T...................... Equation 2

Given: P = 100kPa, T = 25°C = (273+25) = 298K, T' = 125°C = (273+1250K = 398 K

Substitute these values into equation 2

P' = (100×398)/298

P' = 133.56kPa

Hence the pressure is 133.56kPa

6 0
3 years ago
65 million years ago there was a mass extinction that is best kno
polet [3.4K]

Answer:

K-T extinction

Explanation:

This is when all of the non-avian dinosaurs were all wiped out

4 0
3 years ago
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