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3 years ago

What force opposes you when you are trying to push a stove acroos a floor? ASAP HELP please

Chemistry

1 answer:

Kitty [74]3 years ago

8 0

Answer:

gravaity is the force that helps you

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2 A 3-meter-long ramp was used to lift gold into railroads for transfers. The railroads were 1 meter off the ground. What was th

Nataliya [291]

Answer:

Explanation:

For an ideal ramp, M.A/V.R = 1 where M.A = mechanical advantage and V.R = velocity ratio.

Now, V.R = distance moved by effort, d'/distance moved by load, d = d'/d

Now, d' = 3 m and d = 1 m.

So, V.R = d'/d = 3 m/1 m = 3

From M.A/V.R = 1

M.A = V.R = 3

So, the ideal mechanical advantage of the ramp M.A = 3

6 0

3 years ago

A particular reactant decomposes with a half‑life of 109 s when its initial concentration is 0.280 M. The same reactant decompos

Sophie [7]

Answer:

The order of reaction is 2.

Rate constant is 0.0328 (M s)⁻¹

Explanation:

The rate of a reaction is inversely proportional to the time taken for the reaction.

As we are decreasing the concentration of the reactant the half life is increasing.

a) For zero order reaction: the half life is directly proportional to initial concentration of reactant

b) for first order reaction: the half life is independent of the initial concentration.

c) higher order reaction: The relation between half life and rate of reaction is:

Rate = $\frac{1}{k[A_{0}]^{(n-1)}}$

Half life = $K\frac{1}{[A_{0}]^{(n-1)} }$

$\frac{(halflife_{1})}{(halflife_{2})}=\frac{[A_{2}]^{(n-1)}}{[A_{1}]^{(n-1)} }$

where n = order of reaction

Putting values

$\frac{109}{231}=\frac{[0.132]^{(n-1)}}{[0.280]^{(n-1)}}$

$0.472=(0.472)^{(n-1)}$

Hence n = 2

$halflife=\frac{1}{k[A_{0}]}$

Putting values

$231=\frac{1}{K(0.132)}$

K = 0.0328

4 0

3 years ago

What is the word equation for atoms of magnesium reacting with molecules of oxygen to produce magnesium oxide?

Kazeer [188]

Answer:

The "word equation" is Magnesium + Dioxygen → Magnesium Oxide

Explanation: This is also the same as Mg + O₂ → MgO.

5 0

2 years ago

Elements riddle: Without my next door neighbor, I wouldn’t be worth 6 cents. Who am I?

zalisa [80]

If I understand this right, the two elements are Nickel and Copper, elements 28 and 28, respectively. A nickel is worth 5 cents, and a penny, originally comprised of copper, is worth one - the total being six cents.

7 0

3 years ago

Which of the following is NOT an example of proxy data?

Tomtit [17]

Answer:

itz e

Explanation:

8 0

4 years ago