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3 years ago

Is number 1 right and what does a chemical formula include

Chemistry

1 answer:

kifflom [539]3 years ago

7 0

Hi Nick,
The answer to #1 should be c.
Oxy-acids ending in -ous have one less oxygen than ones ending in -ic. For example, Sulfuric acid is H2SO4, and Sulfurous acid is H2SO3.

Problem #2: b. the subscripts indicate the number of each atom or ion. For example, in H2SO4, there are two H atoms and 4 O atoms for every one S atom.

Please throw me a 'brainliest' if you can! :-)

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The balloon Spirit of Freedom, flown around the world by American Steve Fossett in 2002, contained 550,000 cubic feet of helium.

Elodia [21]

Assuming the balloon initially has volume of 0 when deflated, the total P(deltaV) = (1.00 atm)(550,000 ft^3) = 550,000 atm-ft^3. To convert into work units, we can first convert ft^3 to L:
(550,000 atm-ft^3)(1 m/3.28 ft)^3
= (15,586.2 atm-m^3)
Then we convert to L:
(15,586.2 atm-m^3)(1000 L/m^3)
= 15,586,200 atm-L
Then we convert to J:
(15,586,200 atm-L)(101.325 J / 1 atm-L)
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3 years ago

How many moles are in 2.8x10^23 atoms of Calcium?

Zielflug [23.3K]

Answer: 1 mole ➡️ 6.022×10²³ atoms of si.

X mole ➡️ 2.8×10²⁴ atoms of si.

X = 2.8×10×10²³/6.022×10²³

= 28/6.022

= 4.65 moles.

Explanation:

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3 years ago

Which of the following is an example of chemical energy changing into radiant energy?

tatyana61 [14]

Answer:

D. A coil of a toaster glowing when the toaster is switched on

Explanation:

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3 years ago

What happens in a stationary front?

lions [1.4K]

Answer:

c a cold air mass and a warm air mass meet with neither moving

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3 years ago

Characteristics of α, β, and γ rays

Allisa [31]

Answer:

1. it is symbolized as 4/2 He : Alpha rays

2. it has the weakest penetrating power : Alpha rays

3. It is a high-speed electron : beta rays

4. It possesses neither mass nor charge : gamma rays

5. it has the strongest penetrating power : beta rays

6. its is symbolized as 0/-1e : beta rays

7. it is the most massive of all the components: alpha rays

Explanation:

Let us consider the characteristics of each of the given rays.

α rays: These are helium nucleus so are symbolized by $He^{4}_{2}$

Due to two protons and two neutrons unlike beta and gamma rays these are the most massive and thus have least penetrating power among the three given rays.

β rays: These are actually high speed electrons and are symbolized as $^{0}_{-1}e$ . Due to lesser mass than alpha rays they are more penetrating than them however less penetrating than gamma rays.

γ rays : They carry no charge or mass. Due to least massive among the three rays they have highest penetrating power.

7 0

4 years ago