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3 years ago

Why is the "coming up" list on the dashboard useful?

1 answer:

6 0

I'm teaching with Canvas. On my dashboard, under the Coming Up section, none of the assignments that are on the calendar (populated b/c they are "assignments") are displaying. The next one is due in 36 hours so I think it should display and it is listed on the calendar.

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Identify the reactant and products in the following chemical reaction: CH4 + 2O2 ➡ CO2 + 2H2O

kap26 [50]

The reactants are methane and oxygen.

The products are carbon dioxide and water.

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3 years ago

Which is greater, the moons period of rotation or its period of revolution?

balu736 [363]

C. they are equal

This is because it takes about the same amount of time for the moon to rotate around its axis that it does to rotate around the Earth.

3 0

3 years ago

Read 2 more answers

Which subatomic particle will be attracted by a positively charged object?

anyanavicka [17]

Protons are Positively charged

Electrons are Negatively charged

Electrons are attracted to Protons

C) Electron

Hope this Helps!!!

4 0

3 years ago

I have 2 samples of solid chalk (aka calcium carbonate). Sample A has a total mass of 4.12 g and Sample B has a total mass of 19

IRINA_888 [86]

Answer:

A) Sample B has more calcium carbonate molecules

Explanation:

M = Molar mass of calcium carbonate = 100.0869 g/mol

$N_A$ = Avogadro's number = $6.022\times 10^{23}\ \text{mol}^{-1}$

For the 4.12 g sample

Moles of a substance is given by

$n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{4.12}{100.0869}\\\Rightarrow n=0.0411\ \text{mol}$

Number of molecules is given by

$nN_A=0.0411\times 6.022\times 10^{23}=2.48\times 10^{22}\ \text{molecules}$

For the 19.37 g sample

$n=\dfrac{19.37}{100.0869}\\\Rightarrow n=0.193\ \text{mol}$

Number of molecules is given by

$nN_A=0.193\times 6.022\times 10^{23}=1.16\times 10^{23}\ \text{molecules}$

$1.16\times 10^{23}\ \text{molecules}>2.48\times 10^{22}\ \text{molecules}$

So, sample B has more calcium carbonate molecules.

The ratio of the elements of carbon, oxygen, calcium atoms, ions, has to be same in both the samples otherwise the samples cannot be considered as calcium carbonate. Same is applicable for impurities. If there are impurites then the sample cannot be considered as calcium carbonate.

7 0

3 years ago

At what height the acceleration due to gravity of the earth become half ?

Serggg [28]

Answer:

Acceleration due to gravity is reduced to half its value on the earth's surface at an altitude of 2.65×106 m

3 0

3 years ago

Why is the "coming up" list on the dashboard useful?​

Why is the "coming up" list on the dashboard useful?