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3 years ago

I’m general,what was would a scientist do after forming a testable question

Chemistry

1 answer:

vaieri [72.5K]3 years ago

8 0

<em>Develop a hypothesis.</em>

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In the reaction __S+3O2→2SO3, what coefficient should be placed in front of the S to balance the reaction?

AleksAgata [21]

Answer:

Explanation:

because on the product side you have 2 sulfurs so you need 2 on the reactant side.

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3 years ago

HELP with these 2 questions asap

katovenus [111]

Answer:

number 1 is b and and number two d

Explanation:

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4 years ago

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The pH of a solution is 8.83±0.048.83±0.04 . What is the concentration of H+H+ in the solution and its absolute uncertainty?

slava [35]

Answer:

The concentration of $H^{+}$ is 1.48 × $10^{-9}$ M

The absolute uncertainty of $[{H^{+}]$ is ±0.12 × $10^{-9}$ M

The concentration of $H^{+}$ is written as 1.48(±0.12) × $10^{-9}$ M

Explanation:

The pH of a solution is given by the formula below

pH = $-log_{10}[{H^{+}]$

∴ $[H^{+}] = 10^{-pH}$

where $[{H^{+}]$ is the $H^{+}$ concentration

From the question,

pH = 8.83±0.04

That is,

pH =8.83 and the uncertainty is ±0.04

First, we will determine $[{H^{+}]$ from

$[H^{+}] = 10^{-pH}$

$[{H^{+}] = 10^{-8.83}$

$[{H^{+}] = 1.4791$ × $10^{-9}$ M

$[{H^{+}] = 1.48$ × $10^{-9}$ M

The concentration of $H^{+}$ is 1.48 × $10^{-9}$ M

The uncertainty of $[{H^{+}]$ ( $U_{[H^{+}] }$ ) from the equation $[H^{+}] = 10^{-pH}$ is

$U_{[H^{+}] } = 2.303 \\$ × ${[H^{+}] }$ × $U_{pH }$

Where $U_{[H^{+}] }$ is the uncertainty of $[{H^{+}]$

$U_{pH }$ is the uncertainty of the pH

Hence,

$U_{[H^{+}] }$ = 2.303 × 1.4791 × $10^{-9}$ × 0.04

$U_{[H^{+}] }$ = 1.36 × $10^{-10}$ M

$U_{[H^{+}] }$ = 0.12 × $10^{-9}$ M

Hence, the absolute uncertainty of $[{H^{+}]$ is ±0.12 × $10^{-9}$ M

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4 years ago

If sock type A is pulled first, sock type B second, and sock type C third, the fourth sock type must match one of A, B, or C.

alexandr1967 [171]

Answer:

Explanation:

sock type a is first then other sock types

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3 years ago

Which of the following is the best name for NO3?

ANTONII [103]

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4 years ago