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2 years ago

What should you do if your bunsen burner does not light after a few tries with the striker?

1 answer:

8 0

If the burner doesn't light after several strikes, turn the gas off at the source. Verify that you are generating sparks when striking the striker, and check that the barrel is all the way down and the needle valve is open by the specified amount. If these check out, the problem may be insufficient gas flow.

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Please help! will give a thanks

kiruha [24]

Answer:

Scientific Law

Explanation: Earth will ALWAYS attract objects to the center of itself because of gravity. This will never be disproven.

7 0

3 years ago

In which reaction will the point of equilibrium shift to the left when the pressure on the system is increased

Travka [436]

The correct answer for the question that is being presented above is this one: "CaCO3(s) <-> CaO(s) + CO2(g)." In this reaction will the point of equilibrium shift to the left when the pressure on the system is increased: <span>CaCO3(s) <-> CaO(s) + CO2(g)</span>

8 0

3 years ago

Read 2 more answers

What volume of 0.05 mol/L HCl is required to react with 5.00g of manganese dioxide according to this equation?

adell [148]

217 ml of 0.05 M HCl will be required to react with 5 gm of MnO2 according to the equation given.

Explanation:

The balanced chemical equation is given as:

4HCl(aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g)

This shows that 4 moles of HCl reacts with 1 mole of MnO2

the mass of Manganese oxide is given as 5 grams

molar mass of MnO2 = 86.93 grams/mole

number of moles of MnO2 is given by

number of moles = $\frac{mass}{atomic mass of one mole}$

number of moles= $\frac{5}{86.93}$

= 0.0575 moles of MnO2

From the equation:

4 moles of HCl reacts with 1 mole of MnO2

x moles of HCl reacts with $\frac{0.0575}{x}$ moles of MnO2

$\frac{1}{4}$ = $\frac{0.0575}{x}$

= 0.23 moles of HCl will react

atomic mass of HCl = 36.46 Grams/mole

mass = 0.23 x 36.46

= 8.3858 grams.of HCl

molarity of HCl = $\frac{number of moles}{volume in liters}$

volume is 1 litre

so molarity is 0.23 M

Using the formula

M1V1 = M2V2

0.05 x 1 = 0.23 X x

x = 0.217 litre

so 217 ml of 0.05 M HCl will be required to react with 5 gm of MnO2.

4 0

3 years ago

How do scientists do background research on topics they have question about

Aliun [14]

They use information from other things that relate to that topic and then use that to do their research

3 0

4 years ago

How many significant figures are in 136,000 ml?

WINSTONCH [101]

Answer:

There are 3 sig figs

Explanation:

Sig figs are the amount of figures counting from the left side of the number until you reach the first zero. Starting from the left, I counted one, three, and six. That's 3 numbers, and therefore, that's how we got our answer. The only exception is when there is a decimal. Then all the numbers before the decimal, despite whether or not they're zeros, are sig figs.

8 0

3 years ago

Read 2 more answers