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2 years ago

The picture below shows a flower experiencing phototropism, a type of growth movement.

Chemistry

2 answers:

Ratling [72]2 years ago

6 0

I think it’s a.
the plant, Simulated by light through the window

lakkis [162]2 years ago

4 0

The correct answer is A

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Which BEST describes the difference between speed and velocity? A) Velocity is instantaneous.

aleksandrvk [35]

Answer:

Option D describe the best this statement .

Explanation:

As velocity is the quantity which includes the rate of change as well as direction

3 0

3 years ago

Read 2 more answers

A solution has a hydrogen ion concentration of 0.001 M, what is the pH of the solution

LenKa [72]

PH= −log
10

[H
+
]
= −log
10

(0.001)
= −log
10

(10
−3
)
= −(−3)log
10

10
pH=3.
01

4 0

2 years ago

40. Write a balanced equation and a net ionic equation for combining AgNO3(aq) and Na2CO3(aq)

ki77a [65]

2AgNO3 (aq) + Na2CO3 (aq) --> Ag2CO3 (s) + 2NaNO3 (aq)

2Ag(+) (aq) + CO3(2-) (aq) --> Ag2CO3 (s)
hope it helps

3 0

3 years ago

How many moles are in 7.2x10^15 atoms of Pb?

fiasKO [112]

<h3>Answer:</h3>

1.2 × 10⁻⁸ mol Pb

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 7.2 × 10¹⁵ atoms Pb

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 7.2 \cdot 10^{15} \ atoms \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ atoms \ Pb})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 1.19562 \cdot 10^{-8} \ mol \ Pb$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

1.19562 × 10⁻⁸ mol Pb ≈ 1.2 × 10⁻⁸ mol Pb

6 0

2 years ago

Heat moves from what source by convection and radiation?

Alona [7]

Answer:

heat can move from any source but if we are being legitimate it moves from convection

Explanation:

8 0

3 years ago