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Step2247 [10]
3 years ago
7

Mr. McNiece wanted to see how different types of music affected students' pulse rates. He played different types of music: heavy

metal, rap, R&B, alternative, pop, country, and classical music. Identify the dependent variable.
A. high pulse rate
B. Mr. McNiece
C. classical music resulted in the highest pulse rate
D. types of music
E. pulse rate
Chemistry
2 answers:
Yanka [14]3 years ago
6 0
The answer would be d sorry if I am wait on the answer and I am also so sorry because the other person said the answer and said it’s not difficult
adelina 88 [10]3 years ago
5 0

Answer:

Explanation:

Its D it's not difficult

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Which order shows the size of the inner planets from smallest to largest
elixir [45]

Answer:

PLUTO

MERCURY

MARS

VENUS

EARTH

NEPTUNE

URANUS

SATURN

JUPITER

Explanation:

4 0
3 years ago
Read 2 more answers
When a chemical reaction takes place, the number of atoms each element in the reactants ____ the number of atoms of each element
Rzqust [24]

Answer: is equal to

Explanation: According to law of conservation of mass, the mass can neither be created nor be destroyed. Thus the mass of products must be equal to the mass of reactants.

In order to have same mass on both sides of the chemical equation, the number of atoms of each element must be same in reactants as well as products.

2Na+Cl_2\rightarrow 2NaCl

6 0
3 years ago
Read 2 more answers
To determine the concentration of chloride ion (Cl-) in a 100 mL sample of ground water, a chemist adds a large enough volume of
Orlov [11]

Answer:

[Cl^-]=232.3\frac{mgCl^-}{L}

Explanation:

Hello,

In this case, we can represent the chemical reaction as:

Cl^-(aq)+AgNO_3(aq)\rightarrow AgCl(s)+NO_3^-(aq)

In such a way, since the mass of the obtained silver chloride is 93.9 mg, we can compute the chloride ions in the ground water by using the following stoichiometric procedure whereas the molar mass of chloride ions and silver chloride are 35.45 g/mol and 143.32 g/mol respectively:

m_{Cl^-}=93.3mgAgCl*\frac{1mmolAgCl}{143.32mgAgCl}*\frac{1mmolCl^-}{1mmolAgCl} *\frac{35.45mgCl^-}{1mmolCl^-} =23.23mgCl^-

Finally, for the given volume of water in liters (0.100L), we compute the required concentration:

[Cl^-]=\frac{23.2mgCl^-}{0.100L}\\

[Cl^-]=232.3\frac{mgCl^-}{L}

Best regards.

5 0
4 years ago
Which of the following is true of liquids and solids?
gayaneshka [121]
The answer is D. This is because liquids take up the shape of the container they are in, so it is never definite. Where as solids stay the same shape.
3 0
4 years ago
a 9.84 ounces ingot of unknown metal is heated from 73.2 degrees fahrenheit - 191.2 degrees fahrenheit this requires 3.912 calor
Gekata [30.6K]

The SI unit of specific heat is J per gram per degree Celsius. Thus it follows that specific heat could be calculated in this way:

Specific Heat = Energy / (mass x change in temperature)

Thus,

Specific Heat = 3.912 cal / (9.84 oz x (191.2 ˚F – 73.2 ˚F))

Specific Heat = 3.369 x 10^-3 cal/oz-˚F

6 0
4 years ago
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