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butalik [34]
3 years ago
8

Which statement provides a reason why a scientific theory could change? * 1 point O scientists repeat the experiments associated

with the theory O scientists find new evidence that does not fit the theory O the theory is published in a scientific journal O the theory is over 100 years old​
Chemistry
1 answer:
BigorU [14]3 years ago
6 0

Answer:

B. Experiments test the scientists' ideas.

Explanation:

Experiments helps scientist test the ideas.

Experiment is simply an act of performing a controlled test about an idea.

Before an experiment is made, observations using senses must be deduced from the environment at first.

Observations leads to the formulation of hypothesis.

Hypothesis are more or less a scientific predictions.

Most hypothesis presents variables that can be tested.

The test of a hypothesis is an experiment.

Experiments help us makes controlled test about a scientific observation in a laboratory.

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True or false.<br> A bond between a metal atom and a nonmetal atom is likely an iconic bond
vlada-n [284]
It is true...obviously

5 0
4 years ago
A titanium cube contains 2.86×1023 atoms. What is the edge length l of the cube? The density of titanium is 4.50 g/cm3 . (The v
elena55 [62]

Answer:

I = 1.716 cm

Explanation:

We want the length of the cube. In this case, we know that the volume of a cube is:

V = I³

From here we can solve for I:

I = ∛V  (1)

Now, the volume can be obtained using data of density. The expression for density is:

d = m/V

Solvinf for V:

V = m/d (2)

The mass of the cube, can be obtained with the moles and molar mass of titanium:

m = n * MM (3)

And finally, the moles (n) can be obtained using avogadro number:

1 mol ----> 6.02x10²³ atoms (4)

Therefore, to get the length we need to calculate with the atoms of titanium, the moles, then mass, volume and finally the length. Let's calculate the moles of titanium using the ratio of (4):

nTi = 2.86x10²³ / 6.02x10²³ = 0.475 moles

Now, let's calculate the mass using (3) and the molecular mass of titanium which is 47.867 g/mol:

m = 0.475 * 47.867 = 22.737 g

Let's replace this value in (2) to get the volume:

V = 22.737 / 4.5 = 5.053 cm³

Finally, the length using (1):

I = ∛5.053

I = 1.716 cm

This is the length of the cube

4 0
4 years ago
Consider the following equilibrium for nitrous acid, HNO2, a weak acid: HNO2(aq) + H2O (l) —&gt;&lt;— H3O+ (aq) +NO2^-(aq) In wh
Novosadov [1.4K]

Answer:

The equilibrium will shift to the right

Explanation:

The chemical equilibrium represents a balance between direct and inverse reactions.

The Le Chatelier Principle states that variations in experimental conditions can alter this balance and displace the equilibrium position, causing more or less of the desired product to form. And in this way the system evolves in the opposite direction so as to counteract the effects of such disturbance.

The variation of one or more of the following factors are those that can alter the equilibrium condition:

  • Temperature
  • The pressure
  • The volume
  • The concentration of reactants or products

In this case:

NaOH produces OH⁻ ions. OH⁻ ion uses up H₃O⁺  through the reaction:

H₃O⁺ + OH⁻ → 2 H₂O

According to the Le Chatelier principle, the addition of NaOH consumes one of the products, decreasing its concentration. Therefore, to balance the reaction, <u><em>the equilibrium will shift to the right</em></u> in order to counteract the effect that disturbed it and recover the equilibrium state.

4 0
3 years ago
Select the correct structure that
Leni [432]

Answer:

Explanation:

its b

8 0
3 years ago
Suppose 13L of gas is known to contain .965 Mol. If the amount of gas is Increased to 3.20 mol, what new volume will result? (Av
Ostrovityanka [42]

Answer &Explanation:

From Avogadro's lawa equal volume of gas contain equal number of moles

V=N

Hence

13L=965

XL=3.2mol

Hint:as the question state is increase to iteans final mol was 3.2 but if it could state by it would mean initial moles plus adde moles ie 3.2mol)

Cross multiplication

The new volume will be

=(3.2mol×13L÷965mol)

=0.043L

8 0
3 years ago
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