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valina [46]
3 years ago
14

Convection is the up and down movement of what?

Chemistry
1 answer:
Fynjy0 [20]3 years ago
3 0
Convection is the up and down movement of heat. Usually air, but convection also occurs in the ocean.
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Which solution turns litmus paper blue <br> A.acidic<br> B.basic<br> C.neutral<br> D.none
Wittaler [7]

Question: Which solution turns litmus paper blue

Answer: basic

Explanation:compound dissolves in water which cause the solution to become alkaline

question answered by

(jacemorris04)

8 0
3 years ago
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One end of a molecule has a positive charge and the other end of the same molecule has a negative charge. What is the best term
klasskru [66]
An ion is an element that bears only one electric charge, either positive or negative. An isotope is an element with the same number of protons but a different number of neutrons. An electron is a negatively charged subatomic particle. A dipole fits the characteristics. Hence, the answer is B.
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3 years ago
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At a temperature of -25 °C, a sample of gas in a rigid container exerts a pressure of 55.8 kPa. At what temperature will the pre
never [62]
<h3>Given:</h3>

P_{1} = \text{55.8 kPa}

T_{1} = -25^{\circ}\text{C + 273 = 248 K}

P_{2} = \text{145 kPa}

<h3>Unknown:</h3>

T_{2}

<h3>Solution:</h3>

\dfrac{P_{1}}{T_{1}} = \dfrac{P_{2}}{T_{2}}

T_{2} = T_{1} \times \dfrac{P_{2}}{P_{1}}

T_{2} = \text{248 K} \times \dfrac{\text{145 kPa}}{\text{55.8 kPa}}

\boxed{T_{2} = \text{644 K}}

4 0
3 years ago
A compound with an empirical formula of CH3 has a molar mass of 60.2 g/mol. What is its molecular formula?
disa [49]

Answer:

C₄H₁₂

Explanation:

The empirical formula gives you your smallest whole number ratio for the elements in the compound. Find the molar mass using a periodic table. We have one carbon (12.01 g/mol) and three hydrogens (1.008 g/mol). Therefore our molar mass for the empirical formula is 12.01 + 3(1.008) = 15.034 g/mol. To find the molecular formula divide the given molar mass by the empirical formula's molar mass 60.2/15.034 = 4.004257017 = 4. This number is the amount to multiply the empirical formula by to get the molecular formula, therefore your molecular formula is C₄H₁₂

5 0
3 years ago
When a sample of atoms is heated and releases light of certain wavelengths, it is called what?
rjkz [21]

The answer is emission spectrum. It is the range of frequencies of electromagnetic radiation produced because of an atom or molecule generating a transition from a high energy state to a lower energy state. The photon energy of the produced photon is equivalent to the energy change between the two states. There are many conceivable electron changes for each atom, and each change has a precise energy difference. 

8 0
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