A plant's growth response to water is called ____

Question 1 (1 point) How many significant figures are in the number 2,000 ?

Flauer [41]

Answer:

One

Explanation:

Trailing zeros in a number are not significant unless they follow a decimal point.

If you want to specify a different number of significant figures, you can use a decimal point.

For example,

2.0 × 10³ = two significant figures

2.00 × 10³ = three significant figures

2.000 × 10³ = four significant figure

2000. = four significant figures

5 0

3 years ago

The process by which ice widens and deepends cracks in rock is called

sertanlavr [38]

The process by which ice widens and deepens cracks in rock is called Ice welding.

6 0

3 years ago

As you move down a group, you will recall that the radius increases. Why do you think an increase in atomic radius would result

Assoli18 [71]

Answer:

Because as we move down the group size/ radius of atom increases due to increase in shells and screening effect. The hold of nucleus on valence electrons decreases and effective nuclear charge decreases so it is easy to remove electron from greater sized atoms as compared to smaller sized aroms.

Energy required to remove electron is ionization energy so greater sized atoms have low ionization energy.

Explanation:

8 0

3 years ago

Calculate the vapor pressure (in torr) at 298 K in a solution prepared by dissolving 46.8 g of the non-volatile non-electrolye g

Rainbow [258]

Answer: The total partial pressure of the solution is 131.37 torr.

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

For glucose:

Given mass of glucose = 46.8 g

Molar mass of glucose = 180 g/mol

Plugging values in equation 1:

$\text{Moles of glucose}=\frac{46.8g}{180g/mol}=0.26 mol$

For methanol:

Given mass of methanol = 117 g

Molar mass of methanol = 32 g/mol

Plugging values in equation 1:

$\text{Moles of methanol}=\frac{117g}{32g/mol}=3.66 mol$

Mole fraction is defined as the moles of a component present in the total moles of a solution. It is given by the equation:

$\chi_A=\frac{n_A}{n_A+n_B}$ .....(2)

where n is the number of moles

Putting values in equation 2:

$\chi_{methanol}=\frac{3.66}{0.26+3.66}=0.934$

Raoult's law is the law used to calculate the partial pressure of the individual gases present in the mixture. The equation for Raoult's law follows:

$p_A=\chi_A\times p_T$ .....(3)