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8090 [49]
3 years ago
13

Which is the best description of description of speed?

Chemistry
2 answers:
mezya [45]3 years ago
8 0

Answer:

B

Explanation:

Maksim231197 [3]3 years ago
5 0
The answer is B how fast the objects are
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La luna es materia? ayuda pisos es para yaaaaaaa!! ;)​
Valentin [98]

Answer:

La Luna ? Deberia ser materia

Explanation:

6 0
2 years ago
Which of the following is a direct result of global warming that is causing endangerment of polar bears?
frez [133]

increased warmth causing glaciers to melt

you're welcome! :)

3 0
2 years ago
1 how many moles of sodium bicarbonate are needed to neutralize 0.9ml of sulphuric acid at stp​
Natali5045456 [20]

Answer:

8.0356 * 10^-5 moles of NaHCO3

Explanation:

Sulphuric acid = H2SO4

Sodium bicarbonate = NaHCO3

The reaction between both compounds is given by;

2NaHCO3(aq) + H2SO4(aq) → Na2SO4(aq) + 2CO2(g) + 2H2O(l)

In the reactin above;

2 mol of NaHCO3 neutralizes 1 mol of H2SO4

At stp, 1 mol occupies 22.4 L;

1 mol = 22.4 L = 22400 mL

x mol = 0.9 mL

x = 0.9 / 22400 = 4.0178 * 10^-5 moles of H2SO4

Since 2 mol = 1 mol from the equation;

x mol = 4.0178 * 10^-5

x mol = 2 * 4.0178 * 10^-5

x = 8.0356 * 10^-5 moles of NaHCO3

3 0
3 years ago
The vapor pressure of a substance is measured over a range of temperatures. A plot of the natural log of the vapor pressure vers
Gala2k [10]

Answer:

28.7664 kJ /mol

Explanation:

The expression for Clausius-Clapeyron Equation is shown below as:

\ln P = \dfrac{-\Delta{H_{vap}}}{RT} + c

Where,

P is the vapor pressure

ΔHvap  is the Enthalpy of Vaporization

R is the gas constant (8.314×10⁻³ kJ /mol K)

c is the constant.

The graph of ln P and 1/T gives a slope of - ΔHvap/ R and intercept of c.

Given :

Slope = -3.46×10³ K

So,

- ΔHvap/ R = -3.46×10³ K

<u>ΔHvap = 3.46×10³ K × 8.314×10⁻³ kJ /mol K = 28.7664 kJ /mol</u>

<u></u>

6 0
2 years ago
1. During primary ecological succession, the initial formation of soil helps establish —
Art [367]
To think the answer is grasses
6 0
2 years ago
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