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3 years ago

What is the total number of oxygen atoms on the right-hand side of this chemical equation?

Chemistry

1 answer:

vivado [14]3 years ago

8 0

The chemical equation is

Cu(s) +4HNO3(aq) ⇒ Cu(NO3)2(aq) + 2NO2(g) + 2H2O(g)

Answer:

Explanation:

In the right hand side of the equation, there are three compound which contains O2, which are;

Cu(NO3)2 , number of oxygen atoms =3*2 =6

2NO2, number of oxygen atoms = 2*2=4

2H2O, number of oxygen atoms =2*1=2

Total number of oxygen atoms on the right side of equation = 6+4+2 =12

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Philip finds this information while doing research about margarine, which is a synthetic food product.

klemol [59]

Answer:

Research shows conflicting evidence of the effect of trans fats on human health.

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3 years ago

Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 year

melomori [17]

Answer:

$m_{o} \approx 3.247\times 10^{-7}\,g$

Explanation:

The mass of radioactive isotope at a certain time is given by the following expression:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

Time constant can be calculed in terms of half-life:

$\tau = \frac{t_{1/2}}{\ln 2}$

$\tau = \frac{1.26\times 10^{9}\,yr}{\ln 2}$

$\tau = 1.818\times 10^{9}\,yr$

The initial mass is:

$m_{o} = \frac{2.73\times 10^{-7}\,g}{e^{-\frac{3.15\times 10^{8}\,yr}{1.818\times 10^{9}\,yr} }}$

$m_{o} \approx 3.247\times 10^{-7}\,g$

8 0

3 years ago

Which unit is used to measure mass in the metric system

erastova [34]

The answer is Gram :) hope this helps

4 0

3 years ago

Read 2 more answers

In this task, you’ll observe a chemical reaction between baking soda and vinegar in water. write a hypothesis to predict the rel

Archy [21]

Answer:

Increase in the concentration of the reactants (vinegar and baking soda) leads to an increase in the rate of reaction (more volume of CO2 is evolved within a shorter time)

Explanation:

The chemical reaction between baking soda and vinegar in water is shown in the chemical reaction equation below;

NaHCO3(aq) + CH3COOH(aq) ----->CO2(g) + H2O(l) + CH3COONa(aq)

The chemical name of baking soda is sodium bicarbonate (NaHCO3) while vineager is a dilute acetic acid (CH3COOH) solution. This reaction provides a very easy set up in which we can study the effect of concentration on the rate of chemical reaction.

We must have it behind our minds that increase in the concentration of reactant species increases the rate of chemical reaction. Secondly, the rate of the reaction between baking soda and vinegar can be monitored by observing the volume of CO2 evolved and how quickly it evolves from the reaction mixture.

We can now postulate a hypothesis which states that; 'increase in the concentration of the reactants (vinegar and baking soda) leads to an increase in the rate of reaction (more volume of CO2 is evolved within a shorter time).'

If we go ahead to subject this hypothesis to experimental test, it will be confirmed to be true because a greater volume of CO2 will be evolved within a shorter time as the concentration of the reactants increases.

3 0

4 years ago

What kind of energy does an unlit match have?

Harman [31]

Answer:

Potential Energy

Explanation:

Right now, the match is giving off no energy to it's environment.

Light it.

Now it's giving off a few kinds:

Thermal energy (heat)
Light energy

The match has the potential to have energy, but it currently has none.

3 0

3 years ago