2 years ago

What is a substance consisting of two or more elements?

1 answer:

5 0

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound<span>. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Hope this helps.</span>

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As we move UP a energy pyramid, the amount of energy available to each level of consumers

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Explanation:

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2 years ago

potassium, k, has an atomic number of 19 and an atomic mass of 39 how many electrons does a neutral atom of K have?

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A neutral atom of potassium has 19 electrons.

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3 years ago

How many atoms are in 1.00 mol of calcium

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Explanation:

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A scientist needs to collect a 0.050 mole sample of helium, but needs to know how large his helium container should be. What vol

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We can use the ideal gas equation:

PV = nRT

P = 202.6kPa = 202600 Pa (You have to multiply by 1000)

n = 0.050 mole

R = 0.082 atm*l/(K*mol)

T = 400K

We will have to convert from Pa to atm or viceversa.

101325 Pa________1 atm

202600 Pa________x = 2.00 atm

2atm*V = 0.050 mole*0.082 atm*l/(K*mol)* 400K

V = 0.050 mole*0.082 atm*l/(K*mol)* 400K/2atm = 0.82 liters = 820 mililiters

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3 years ago